TY  - JOUR
AU  - Ma, Bo
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Pang, Wancheng
AU  - Liu, Bang
AU  - Zhu, Xiaozhe
AU  - Cao, Ying
AU  - Zhao, Chenchen
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6880
AB  - The heterogeneous-homogeneous coupled Fenton (HHCF) processes combine the advantages of rapid reaction and the catalyst reuse, which makes them attractive for wastewater treatment. Nevertheless, the lack of both, cost-effective catalysts and the desirable Fe3+/Fe2+ conversion mediators limit the development of HHCF processes. This study investigates a prospective HHCF process, in which solid waste copper slag (CS) and dithionite (DNT) act as catalyst and mediator of Fe3+/Fe2+ transformation, respectively. DNT enables controlled leaching of iron and a highly efficient homogeneous Fe3+/Fe2+ cycle by dissociating to SO2- • under acidic conditions,
leading to the enhanced H2O2 decomposition and •OH generation (from 48 μmol/L to 399 μmol/L) for pchloroaniline (p-CA) degradation. The removal rate of p-CA in the CS/DNT/H2O2 system increased by 30 times in comparison with the CS/H2O2 system (increased from 1.21 × 10-3 min-1 to 3.61 × 10-2 min-1). Moreover, batch dosing of H2O2 can greatly promote the yield of •OH (from 399 μmol/L to 627 μmol/L), by mitigating the side reactions between H2O2 and SO2- •. This study highlights the importance of the iron cycle regulation for improvement of the Fenton efficiency and develops a cost-effective Fenton system for organic contaminants elimination in wastewater.
PB  - Elsevier
T2  - Journal of Hazardous Materials
T1  - Dithionite accelerated copper slag heterogeneous-homogeneous coupled Fenton degradation of organic pollutants
VL  - 457
SP  - 131797
DO  - 10.1016/j.jhazmat.2023.131797
ER  - 

@article{
author = "Ma, Bo and Yao, Jun and Šolević Knudsen, Tatjana and Pang, Wancheng and Liu, Bang and Zhu, Xiaozhe and Cao, Ying and Zhao, Chenchen",
year = "2023",
abstract = "The heterogeneous-homogeneous coupled Fenton (HHCF) processes combine the advantages of rapid reaction and the catalyst reuse, which makes them attractive for wastewater treatment. Nevertheless, the lack of both, cost-effective catalysts and the desirable Fe3+/Fe2+ conversion mediators limit the development of HHCF processes. This study investigates a prospective HHCF process, in which solid waste copper slag (CS) and dithionite (DNT) act as catalyst and mediator of Fe3+/Fe2+ transformation, respectively. DNT enables controlled leaching of iron and a highly efficient homogeneous Fe3+/Fe2+ cycle by dissociating to SO2- • under acidic conditions,
leading to the enhanced H2O2 decomposition and •OH generation (from 48 μmol/L to 399 μmol/L) for pchloroaniline (p-CA) degradation. The removal rate of p-CA in the CS/DNT/H2O2 system increased by 30 times in comparison with the CS/H2O2 system (increased from 1.21 × 10-3 min-1 to 3.61 × 10-2 min-1). Moreover, batch dosing of H2O2 can greatly promote the yield of •OH (from 399 μmol/L to 627 μmol/L), by mitigating the side reactions between H2O2 and SO2- •. This study highlights the importance of the iron cycle regulation for improvement of the Fenton efficiency and develops a cost-effective Fenton system for organic contaminants elimination in wastewater.",
publisher = "Elsevier",
journal = "Journal of Hazardous Materials",
title = "Dithionite accelerated copper slag heterogeneous-homogeneous coupled Fenton degradation of organic pollutants",
volume = "457",
pages = "131797",
doi = "10.1016/j.jhazmat.2023.131797"
}

Ma, B., Yao, J., Šolević Knudsen, T., Pang, W., Liu, B., Zhu, X., Cao, Y.,& Zhao, C.. (2023). Dithionite accelerated copper slag heterogeneous-homogeneous coupled Fenton degradation of organic pollutants. in Journal of Hazardous Materials
Elsevier., 457, 131797.
https://doi.org/10.1016/j.jhazmat.2023.131797

Ma B, Yao J, Šolević Knudsen T, Pang W, Liu B, Zhu X, Cao Y, Zhao C. Dithionite accelerated copper slag heterogeneous-homogeneous coupled Fenton degradation of organic pollutants. in Journal of Hazardous Materials. 2023;457:131797.
doi:10.1016/j.jhazmat.2023.131797 .

Ma, Bo, Yao, Jun, Šolević Knudsen, Tatjana, Pang, Wancheng, Liu, Bang, Zhu, Xiaozhe, Cao, Ying, Zhao, Chenchen, "Dithionite accelerated copper slag heterogeneous-homogeneous coupled Fenton degradation of organic pollutants" in Journal of Hazardous Materials, 457 (2023):131797,
https://doi.org/10.1016/j.jhazmat.2023.131797 . .

TY  - JOUR
AU  - Cao, Ying
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Pang, Wancheng
AU  - Ma, Bo
AU  - Li, Hao
AU  - Zhao, Chenchen
AU  - Liu, Bang
AU  - Li, Miaomiao
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6879
AB  - The growing problem of typical organic pollution in mines, and the effective utilization of increasing mine industrial wastes have been the most challenging issues in the current global situation. In this study, copper smelting slag (CSS), hydroxylamine (HA) and H2O2 were employed to construct an efficient surface heterogeneous catalyst for the degradation of organic pollutants in mines. Fayalite and its ≡Fe were proved, by multiple methods, to be the crucial ferriferous catalyst in the CSS. HA greatly increased the oxidation effectiveness of the CSS from 53.6% to ~100% by regulating the Fe2+/Fe3+ circulation within the fayalite lattice. Due to the special structural configuration of iron atoms in fayalite, the surface generation rate of •OH catalyzed by CSS was 101-106 times higher than in other iron-bearing minerals. •OH was demonstrated to be the main active radical species, and as an intermediate, O2•- also had a role in the oxidation process. In the presence of low doses of Cr, a synergistic removal of organic pollutants occurred, dominated by the electron transfer. Accordingly, this study proposes both, a new design concept for recycling the industrial solid waste from mines and a new surface catalyst system for the removal of organic pollutants from mining.
PB  - Elsevier
T2  - Journal of Cleaner Production
T1  - Synergy between fayalite-constituted waste copper smelting slag and hydroxylamine: An efficient combination for construction and application of a surface Fenton system in removal of mining organic pollutants
VL  - 425
SP  - 138649
DO  - 10.1016/j.jclepro.2023.138649
ER  - 

@article{
author = "Cao, Ying and Yao, Jun and Šolević Knudsen, Tatjana and Pang, Wancheng and Ma, Bo and Li, Hao and Zhao, Chenchen and Liu, Bang and Li, Miaomiao",
year = "2023",
abstract = "The growing problem of typical organic pollution in mines, and the effective utilization of increasing mine industrial wastes have been the most challenging issues in the current global situation. In this study, copper smelting slag (CSS), hydroxylamine (HA) and H2O2 were employed to construct an efficient surface heterogeneous catalyst for the degradation of organic pollutants in mines. Fayalite and its ≡Fe were proved, by multiple methods, to be the crucial ferriferous catalyst in the CSS. HA greatly increased the oxidation effectiveness of the CSS from 53.6% to ~100% by regulating the Fe2+/Fe3+ circulation within the fayalite lattice. Due to the special structural configuration of iron atoms in fayalite, the surface generation rate of •OH catalyzed by CSS was 101-106 times higher than in other iron-bearing minerals. •OH was demonstrated to be the main active radical species, and as an intermediate, O2•- also had a role in the oxidation process. In the presence of low doses of Cr, a synergistic removal of organic pollutants occurred, dominated by the electron transfer. Accordingly, this study proposes both, a new design concept for recycling the industrial solid waste from mines and a new surface catalyst system for the removal of organic pollutants from mining.",
publisher = "Elsevier",
journal = "Journal of Cleaner Production",
title = "Synergy between fayalite-constituted waste copper smelting slag and hydroxylamine: An efficient combination for construction and application of a surface Fenton system in removal of mining organic pollutants",
volume = "425",
pages = "138649",
doi = "10.1016/j.jclepro.2023.138649"
}

Cao, Y., Yao, J., Šolević Knudsen, T., Pang, W., Ma, B., Li, H., Zhao, C., Liu, B.,& Li, M.. (2023). Synergy between fayalite-constituted waste copper smelting slag and hydroxylamine: An efficient combination for construction and application of a surface Fenton system in removal of mining organic pollutants. in Journal of Cleaner Production
Elsevier., 425, 138649.
https://doi.org/10.1016/j.jclepro.2023.138649

Cao Y, Yao J, Šolević Knudsen T, Pang W, Ma B, Li H, Zhao C, Liu B, Li M. Synergy between fayalite-constituted waste copper smelting slag and hydroxylamine: An efficient combination for construction and application of a surface Fenton system in removal of mining organic pollutants. in Journal of Cleaner Production. 2023;425:138649.
doi:10.1016/j.jclepro.2023.138649 .

Cao, Ying, Yao, Jun, Šolević Knudsen, Tatjana, Pang, Wancheng, Ma, Bo, Li, Hao, Zhao, Chenchen, Liu, Bang, Li, Miaomiao, "Synergy between fayalite-constituted waste copper smelting slag and hydroxylamine: An efficient combination for construction and application of a surface Fenton system in removal of mining organic pollutants" in Journal of Cleaner Production, 425 (2023):138649,
https://doi.org/10.1016/j.jclepro.2023.138649 . .

TY  - JOUR
AU  - Cao, Ying
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Pang, Wancheng
AU  - Zhu, Junjie
AU  - Liu, Bang
AU  - Li, Hao
AU  - Li, Miaomiao
AU  - Su, Jianchao
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5580
AB  - UV-assisted advanced oxidation processes (AOPs) are widely used and studied in degradation of bisphenol A (BPA). However, detailed information on their radical chemistry and degradation mechanisms is still lacking. In this study, degradation of BPA was comparatively evaluated to investigate the radical mechanisms, products and the toxicity variation in UV/chlorine and UV/H2O2 processes. In comparison with UV/H2O2, UV/chlorine had a higher BPA degradation efficiency and higher pH-dependency due to chlorination and the synergy of •OH and RCS. The •OH and Cl• played a pivotal role as the primary radicals in BPA degradation by UV/chlorine process at all pH investigated (6–8). The relative contributions of the secondary radicals ClO• gradually decreased with a variation of pH from 6 to 8 in this process. Presence of HCO3─ and HA inhibited BPA degradation to different extents in UV/chlorine process, while the effect of Cl─ could be neglected. According to the identified transformation products, chlorination (major), hydroxylation and breakage of the isopropylidene chain were BPA decomposition pathways in the UV/chlorine system. In the UV/H2O2 system, only hydroxylation (major) and breakage of the isopropylidene chain occurred. The toxicity analysis, based on the proposed degradation pathways, indicated that the generation of chlorinated products in the UV/chlorine system led to a higher toxicity of the resulting mixture than in the UV/H2O2 system. Although UV/chlorine has an excellent BPA degradation effect and it is cost-effective, the possible environmental risk should be carefully considered when UV/chlorine system is used to remove BPA in real waters.
PB  - Elsevier BV
T2  - Chemosphere
T1  - Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2
VL  - 312
SP  - 137169
DO  - 10.1016/j.chemosphere.2022.137169
ER  - 

@article{
author = "Cao, Ying and Yao, Jun and Šolević Knudsen, Tatjana and Pang, Wancheng and Zhu, Junjie and Liu, Bang and Li, Hao and Li, Miaomiao and Su, Jianchao",
year = "2023",
abstract = "UV-assisted advanced oxidation processes (AOPs) are widely used and studied in degradation of bisphenol A (BPA). However, detailed information on their radical chemistry and degradation mechanisms is still lacking. In this study, degradation of BPA was comparatively evaluated to investigate the radical mechanisms, products and the toxicity variation in UV/chlorine and UV/H2O2 processes. In comparison with UV/H2O2, UV/chlorine had a higher BPA degradation efficiency and higher pH-dependency due to chlorination and the synergy of •OH and RCS. The •OH and Cl• played a pivotal role as the primary radicals in BPA degradation by UV/chlorine process at all pH investigated (6–8). The relative contributions of the secondary radicals ClO• gradually decreased with a variation of pH from 6 to 8 in this process. Presence of HCO3─ and HA inhibited BPA degradation to different extents in UV/chlorine process, while the effect of Cl─ could be neglected. According to the identified transformation products, chlorination (major), hydroxylation and breakage of the isopropylidene chain were BPA decomposition pathways in the UV/chlorine system. In the UV/H2O2 system, only hydroxylation (major) and breakage of the isopropylidene chain occurred. The toxicity analysis, based on the proposed degradation pathways, indicated that the generation of chlorinated products in the UV/chlorine system led to a higher toxicity of the resulting mixture than in the UV/H2O2 system. Although UV/chlorine has an excellent BPA degradation effect and it is cost-effective, the possible environmental risk should be carefully considered when UV/chlorine system is used to remove BPA in real waters.",
publisher = "Elsevier BV",
journal = "Chemosphere",
title = "Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2",
volume = "312",
pages = "137169",
doi = "10.1016/j.chemosphere.2022.137169"
}

Cao, Y., Yao, J., Šolević Knudsen, T., Pang, W., Zhu, J., Liu, B., Li, H., Li, M.,& Su, J.. (2023). Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2. in Chemosphere
Elsevier BV., 312, 137169.
https://doi.org/10.1016/j.chemosphere.2022.137169

Cao Y, Yao J, Šolević Knudsen T, Pang W, Zhu J, Liu B, Li H, Li M, Su J. Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2. in Chemosphere. 2023;312:137169.
doi:10.1016/j.chemosphere.2022.137169 .

Cao, Ying, Yao, Jun, Šolević Knudsen, Tatjana, Pang, Wancheng, Zhu, Junjie, Liu, Bang, Li, Hao, Li, Miaomiao, Su, Jianchao, "Radical chemistry, degradation mechanism and toxicity evolution of BPA in the UV/chlorine and UV/H2O2" in Chemosphere, 312 (2023):137169,
https://doi.org/10.1016/j.chemosphere.2022.137169 . .

TY  - JOUR
AU  - Pang, Wancheng
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Cao, Ying
AU  - Liu, Bang
AU  - Li, Hao
AU  - Li, Miaomiao
AU  - Zhu, Junjie
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5331
AB  - This work systematically studied the kinetics and mechanism of degradation of salicylhydroxamic acid (SHA), benzhydroxamic acid (BHA) and N-hydroxyphthalimide (NOP) by UVA-B/H2O2 and UVA-B/peroxodisulfate (PDS). UVA-B irradiation could induce a direct photolysis of SHA and dominated SHA destruction in both systems. BHA and NOP were effectively degraded via HO•- and SO4•−-mediated oxidation. UVA-B/PDS displayed a better degradation performance for HAAs investigated than UVA-B/H2O2. An acidic pH was more suitable for three HAAs removal in the UVA-B/H2O2 system. However, basic pH was more efficient for HAAs degradation in the UVA-B/PDS system. The degradation of BHA and NOP was predominantly driven by SO4•− at all pH levels used (5.0–9.0). The second-order rate constants for SHA, BHA and NOP reactions with HO• and SO4•− were calculated to be (4.16–5.22) × 109 M−1•s−1 and (1.19–7.22) × 109 M−1•s−1, respectively. Presence of various water constituents had different influence on HAA removal, with a enhancement in the presence of HCO3–, Fe2+ and Cu2+. When real waters were used as a background, dissolved organic carbon and Cl− were the main factors that consumed radicals and affected the degradation performance of HAAs. Analysis of the transformation products and density functional theory revealed that all of the investigated HAAs first generated amidated products but the formation mechanisms might have been different. HAAs degradation pathways mainly included hydrolysis, hydroxylation, decarboxylation and ring opening processes. Toxicity evaluation showed that the UV/AOP degradation of HAAs generated some transformation products with higher acute toxicity than the parent compounds.
PB  - Elsevier
T2  - Chemical Engineering Journal
T1  - Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation
VL  - 451
SP  - 138639
DO  - 10.1016/j.cej.2022.138639
ER  - 

@article{
author = "Pang, Wancheng and Yao, Jun and Šolević Knudsen, Tatjana and Cao, Ying and Liu, Bang and Li, Hao and Li, Miaomiao and Zhu, Junjie",
year = "2023",
abstract = "This work systematically studied the kinetics and mechanism of degradation of salicylhydroxamic acid (SHA), benzhydroxamic acid (BHA) and N-hydroxyphthalimide (NOP) by UVA-B/H2O2 and UVA-B/peroxodisulfate (PDS). UVA-B irradiation could induce a direct photolysis of SHA and dominated SHA destruction in both systems. BHA and NOP were effectively degraded via HO•- and SO4•−-mediated oxidation. UVA-B/PDS displayed a better degradation performance for HAAs investigated than UVA-B/H2O2. An acidic pH was more suitable for three HAAs removal in the UVA-B/H2O2 system. However, basic pH was more efficient for HAAs degradation in the UVA-B/PDS system. The degradation of BHA and NOP was predominantly driven by SO4•− at all pH levels used (5.0–9.0). The second-order rate constants for SHA, BHA and NOP reactions with HO• and SO4•− were calculated to be (4.16–5.22) × 109 M−1•s−1 and (1.19–7.22) × 109 M−1•s−1, respectively. Presence of various water constituents had different influence on HAA removal, with a enhancement in the presence of HCO3–, Fe2+ and Cu2+. When real waters were used as a background, dissolved organic carbon and Cl− were the main factors that consumed radicals and affected the degradation performance of HAAs. Analysis of the transformation products and density functional theory revealed that all of the investigated HAAs first generated amidated products but the formation mechanisms might have been different. HAAs degradation pathways mainly included hydrolysis, hydroxylation, decarboxylation and ring opening processes. Toxicity evaluation showed that the UV/AOP degradation of HAAs generated some transformation products with higher acute toxicity than the parent compounds.",
publisher = "Elsevier",
journal = "Chemical Engineering Journal",
title = "Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation",
volume = "451",
pages = "138639",
doi = "10.1016/j.cej.2022.138639"
}

Pang, W., Yao, J., Šolević Knudsen, T., Cao, Y., Liu, B., Li, H., Li, M.,& Zhu, J.. (2023). Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation. in Chemical Engineering Journal
Elsevier., 451, 138639.
https://doi.org/10.1016/j.cej.2022.138639

Pang W, Yao J, Šolević Knudsen T, Cao Y, Liu B, Li H, Li M, Zhu J. Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation. in Chemical Engineering Journal. 2023;451:138639.
doi:10.1016/j.cej.2022.138639 .

Pang, Wancheng, Yao, Jun, Šolević Knudsen, Tatjana, Cao, Ying, Liu, Bang, Li, Hao, Li, Miaomiao, Zhu, Junjie, "Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation" in Chemical Engineering Journal, 451 (2023):138639,
https://doi.org/10.1016/j.cej.2022.138639 . .

TY  - JOUR
AU  - Ma, Bo
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Chen, Zhihui
AU  - Pang, Wancheng
AU  - Liu, Bang
AU  - Cao, Ying
AU  - Zhu, Xiaozhe
AU  - Zhao, Chenchen
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5369
AB  - In this study, efficient simultaneous elimination of typical mine pollutants benzotriazole (BTA) and Cr(VI) was achieved by using a copper slag (CS) activated peroxodisulfate (PDS) Fenton system, with WS2 as a co-catalyst. The combined use of these two mine-sourced materials enables excellent pollution removal efficiency. CS can continuously release ferrous ions for the advanced oxidation processes (AOPs), while WS2 as a co-catalyst has key roles in acceleration of the rate-limiting step of Fe3+/Fe2+ conversion and prevention of Fe3+ precipitation. In this process, Fe3+/Fe2+ conversion primarily occurs on the surface of WS2, whereas PDS decomposition and BTA degradation are dominated by homogeneous Fenton reactions. Dissolved Fe2+ has a main role in the activation of PDS and generation of ROS. The contributions of free radicals, singlet oxygen and Fe(IV) in BTA degradation were carefully evaluated. Fe(IV) was identified as the major ROS responsible for degradation of BTA in the CS/WS2/PDS system. This was further confirmed by the Raman spectra and the detection of BTA degradation products formed by the transfer of oxygen atoms. Kinetics calculation showed that Fe(IV) was responsible for 63.4 % of the degradation of BTA. More importantly, water matrix had a low impact on the degradation of BTA due to the high selectivity of Fe(IV). This study provides a new strategy for a cost-effective and efficient decontamination of the environment in mining areas.
PB  - Elsevier
T2  - Chemical Engineering Journal
T1  - Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI)
VL  - 451
IS  - 3
SP  - 138888
DO  - 10.1016/j.cej.2022.138888
ER  - 

@article{
author = "Ma, Bo and Yao, Jun and Šolević Knudsen, Tatjana and Chen, Zhihui and Pang, Wancheng and Liu, Bang and Cao, Ying and Zhu, Xiaozhe and Zhao, Chenchen",
year = "2023",
abstract = "In this study, efficient simultaneous elimination of typical mine pollutants benzotriazole (BTA) and Cr(VI) was achieved by using a copper slag (CS) activated peroxodisulfate (PDS) Fenton system, with WS2 as a co-catalyst. The combined use of these two mine-sourced materials enables excellent pollution removal efficiency. CS can continuously release ferrous ions for the advanced oxidation processes (AOPs), while WS2 as a co-catalyst has key roles in acceleration of the rate-limiting step of Fe3+/Fe2+ conversion and prevention of Fe3+ precipitation. In this process, Fe3+/Fe2+ conversion primarily occurs on the surface of WS2, whereas PDS decomposition and BTA degradation are dominated by homogeneous Fenton reactions. Dissolved Fe2+ has a main role in the activation of PDS and generation of ROS. The contributions of free radicals, singlet oxygen and Fe(IV) in BTA degradation were carefully evaluated. Fe(IV) was identified as the major ROS responsible for degradation of BTA in the CS/WS2/PDS system. This was further confirmed by the Raman spectra and the detection of BTA degradation products formed by the transfer of oxygen atoms. Kinetics calculation showed that Fe(IV) was responsible for 63.4 % of the degradation of BTA. More importantly, water matrix had a low impact on the degradation of BTA due to the high selectivity of Fe(IV). This study provides a new strategy for a cost-effective and efficient decontamination of the environment in mining areas.",
publisher = "Elsevier",
journal = "Chemical Engineering Journal",
title = "Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI)",
volume = "451",
number = "3",
pages = "138888",
doi = "10.1016/j.cej.2022.138888"
}

Ma, B., Yao, J., Šolević Knudsen, T., Chen, Z., Pang, W., Liu, B., Cao, Y., Zhu, X.,& Zhao, C.. (2023). Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI). in Chemical Engineering Journal
Elsevier., 451(3), 138888.
https://doi.org/10.1016/j.cej.2022.138888

Ma B, Yao J, Šolević Knudsen T, Chen Z, Pang W, Liu B, Cao Y, Zhu X, Zhao C. Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI). in Chemical Engineering Journal. 2023;451(3):138888.
doi:10.1016/j.cej.2022.138888 .

Ma, Bo, Yao, Jun, Šolević Knudsen, Tatjana, Chen, Zhihui, Pang, Wancheng, Liu, Bang, Cao, Ying, Zhu, Xiaozhe, Zhao, Chenchen, "Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI)" in Chemical Engineering Journal, 451, no. 3 (2023):138888,
https://doi.org/10.1016/j.cej.2022.138888 . .

TY  - JOUR
AU  - Pang, Wancheng
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Cao, Ying
AU  - Liu, Bang
AU  - Li, Hao
AU  - Li, Miaomiao
AU  - Zhu, Junjie
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5546
AB  - This work systematically studied the kinetics and mechanism of degradation of salicylhydroxamic acid (SHA), benzhydroxamic acid (BHA) and N-hydroxyphthalimide (NOP) by UVA-B/H2O2 and UVA-B/peroxodisulfate (PDS). UVA-B irradiation could induce a direct photolysis of SHA and dominated SHA destruction in both systems. BHA and NOP were effectively degraded via HO•- and SO4•−-mediated oxidation. UVA-B/PDS displayed a better degradation performance for HAAs investigated than UVA-B/H2O2. An acidic pH was more suitable for three HAAs removal in the UVA-B/H2O2 system. However, basic pH was more efficient for HAAs degradation in the UVA-B/PDS system. The degradation of BHA and NOP was predominantly driven by SO4•− at all pH levels used (5.0–9.0). The second-order rate constants for SHA, BHA and NOP reactions with HO• and SO4•− were calculated to be (4.16–5.22) × 109 M−1•s−1 and (1.19–7.22) × 109 M−1•s−1, respectively. Presence of various water constituents had different influence on HAA removal, with a enhancement in the presence of HCO3–, Fe2+ and Cu2+. When real waters were used as a background, dissolved organic carbon and Cl− were the main factors that consumed radicals and affected the degradation performance of HAAs. Analysis of the transformation products and density functional theory revealed that all of the investigated HAAs first generated amidated products but the formation mechanisms might have been different. HAAs degradation pathways mainly included hydrolysis, hydroxylation, decarboxylation and ring opening processes. Toxicity evaluation showed that the UV/AOP degradation of HAAs generated some transformation products with higher acute toxicity than the parent compounds.
PB  - Elsevier
T2  - Chemical Engineering Journal
T1  - Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation
VL  - 451
SP  - 138639
DO  - 10.1016/j.cej.2022.138639
ER  - 

@article{
author = "Pang, Wancheng and Yao, Jun and Šolević Knudsen, Tatjana and Cao, Ying and Liu, Bang and Li, Hao and Li, Miaomiao and Zhu, Junjie",
year = "2023",
abstract = "This work systematically studied the kinetics and mechanism of degradation of salicylhydroxamic acid (SHA), benzhydroxamic acid (BHA) and N-hydroxyphthalimide (NOP) by UVA-B/H2O2 and UVA-B/peroxodisulfate (PDS). UVA-B irradiation could induce a direct photolysis of SHA and dominated SHA destruction in both systems. BHA and NOP were effectively degraded via HO•- and SO4•−-mediated oxidation. UVA-B/PDS displayed a better degradation performance for HAAs investigated than UVA-B/H2O2. An acidic pH was more suitable for three HAAs removal in the UVA-B/H2O2 system. However, basic pH was more efficient for HAAs degradation in the UVA-B/PDS system. The degradation of BHA and NOP was predominantly driven by SO4•− at all pH levels used (5.0–9.0). The second-order rate constants for SHA, BHA and NOP reactions with HO• and SO4•− were calculated to be (4.16–5.22) × 109 M−1•s−1 and (1.19–7.22) × 109 M−1•s−1, respectively. Presence of various water constituents had different influence on HAA removal, with a enhancement in the presence of HCO3–, Fe2+ and Cu2+. When real waters were used as a background, dissolved organic carbon and Cl− were the main factors that consumed radicals and affected the degradation performance of HAAs. Analysis of the transformation products and density functional theory revealed that all of the investigated HAAs first generated amidated products but the formation mechanisms might have been different. HAAs degradation pathways mainly included hydrolysis, hydroxylation, decarboxylation and ring opening processes. Toxicity evaluation showed that the UV/AOP degradation of HAAs generated some transformation products with higher acute toxicity than the parent compounds.",
publisher = "Elsevier",
journal = "Chemical Engineering Journal",
title = "Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation",
volume = "451",
pages = "138639",
doi = "10.1016/j.cej.2022.138639"
}

Pang, W., Yao, J., Šolević Knudsen, T., Cao, Y., Liu, B., Li, H., Li, M.,& Zhu, J.. (2023). Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation. in Chemical Engineering Journal
Elsevier., 451, 138639.
https://doi.org/10.1016/j.cej.2022.138639

Pang W, Yao J, Šolević Knudsen T, Cao Y, Liu B, Li H, Li M, Zhu J. Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation. in Chemical Engineering Journal. 2023;451:138639.
doi:10.1016/j.cej.2022.138639 .

Pang, Wancheng, Yao, Jun, Šolević Knudsen, Tatjana, Cao, Ying, Liu, Bang, Li, Hao, Li, Miaomiao, Zhu, Junjie, "Degradation of three typical hydroxamic acids collectors via UVA-B activated H2O2 and persulfate: Kinetics, transformation pathway, DFT calculation and toxicity evaluation" in Chemical Engineering Journal, 451 (2023):138639,
https://doi.org/10.1016/j.cej.2022.138639 . .

TY  - JOUR
AU  - Ma, Bo
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Chen, Zhihui
AU  - Pang, Wancheng
AU  - Liu, Bang
AU  - Cao, Ying
AU  - Zhu, Xiaozhe
AU  - Zhao, Chenchen
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5547
AB  - In this study, efficient simultaneous elimination of typical mine pollutants benzotriazole (BTA) and Cr(VI) was achieved by using a copper slag (CS) activated peroxodisulfate (PDS) Fenton system, with WS2 as a co-catalyst. The combined use of these two mine-sourced materials enables excellent pollution removal efficiency. CS can continuously release ferrous ions for the advanced oxidation processes (AOPs), while WS2 as a co-catalyst has key roles in acceleration of the rate-limiting step of Fe3+/Fe2+ conversion and prevention of Fe3+ precipitation. In this process, Fe3+/Fe2+ conversion primarily occurs on the surface of WS2, whereas PDS decomposition and BTA degradation are dominated by homogeneous Fenton reactions. Dissolved Fe2+ has a main role in the activation of PDS and generation of ROS. The contributions of free radicals, singlet oxygen and Fe(IV) in BTA degradation were carefully evaluated. Fe(IV) was identified as the major ROS responsible for degradation of BTA in the CS/WS2/PDS system. This was further confirmed by the Raman spectra and the detection of BTA degradation products formed by the transfer of oxygen atoms. Kinetics calculation showed that Fe(IV) was responsible for 63.4 % of the degradation of BTA. More importantly, water matrix had a low impact on the degradation of BTA due to the high selectivity of Fe(IV). This study provides a new strategy for a cost-effective and efficient decontamination of the environment in mining areas.
PB  - Elsevier
T2  - Chemical Engineering Journal
T1  - Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI)
VL  - 451
IS  - 3
SP  - 138888
DO  - 10.1016/j.cej.2022.138888
ER  - 

@article{
author = "Ma, Bo and Yao, Jun and Šolević Knudsen, Tatjana and Chen, Zhihui and Pang, Wancheng and Liu, Bang and Cao, Ying and Zhu, Xiaozhe and Zhao, Chenchen",
year = "2023",
abstract = "In this study, efficient simultaneous elimination of typical mine pollutants benzotriazole (BTA) and Cr(VI) was achieved by using a copper slag (CS) activated peroxodisulfate (PDS) Fenton system, with WS2 as a co-catalyst. The combined use of these two mine-sourced materials enables excellent pollution removal efficiency. CS can continuously release ferrous ions for the advanced oxidation processes (AOPs), while WS2 as a co-catalyst has key roles in acceleration of the rate-limiting step of Fe3+/Fe2+ conversion and prevention of Fe3+ precipitation. In this process, Fe3+/Fe2+ conversion primarily occurs on the surface of WS2, whereas PDS decomposition and BTA degradation are dominated by homogeneous Fenton reactions. Dissolved Fe2+ has a main role in the activation of PDS and generation of ROS. The contributions of free radicals, singlet oxygen and Fe(IV) in BTA degradation were carefully evaluated. Fe(IV) was identified as the major ROS responsible for degradation of BTA in the CS/WS2/PDS system. This was further confirmed by the Raman spectra and the detection of BTA degradation products formed by the transfer of oxygen atoms. Kinetics calculation showed that Fe(IV) was responsible for 63.4 % of the degradation of BTA. More importantly, water matrix had a low impact on the degradation of BTA due to the high selectivity of Fe(IV). This study provides a new strategy for a cost-effective and efficient decontamination of the environment in mining areas.",
publisher = "Elsevier",
journal = "Chemical Engineering Journal",
title = "Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI)",
volume = "451",
number = "3",
pages = "138888",
doi = "10.1016/j.cej.2022.138888"
}

Ma, B., Yao, J., Šolević Knudsen, T., Chen, Z., Pang, W., Liu, B., Cao, Y., Zhu, X.,& Zhao, C.. (2023). Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI). in Chemical Engineering Journal
Elsevier., 451(3), 138888.
https://doi.org/10.1016/j.cej.2022.138888

Ma B, Yao J, Šolević Knudsen T, Chen Z, Pang W, Liu B, Cao Y, Zhu X, Zhao C. Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI). in Chemical Engineering Journal. 2023;451(3):138888.
doi:10.1016/j.cej.2022.138888 .

Ma, Bo, Yao, Jun, Šolević Knudsen, Tatjana, Chen, Zhihui, Pang, Wancheng, Liu, Bang, Cao, Ying, Zhu, Xiaozhe, Zhao, Chenchen, "Co-catalytic effect of WS2 on the copper slag mediated peroxodisulfate activation for the simultaneous elimination of typical flotation reagent benzotriazole and Cr(VI)" in Chemical Engineering Journal, 451, no. 3 (2023):138888,
https://doi.org/10.1016/j.cej.2022.138888 . .

TY  - JOUR
AU  - Chen, Zhihui
AU  - Yao, Jun
AU  - Šolević Knudsen, Tatjana
AU  - Ma, Bo
AU  - Liu, Bang
AU  - Li, Haoa
AU  - Zhu, Xiaozhe
AU  - Zhao, Chenchen
AU  - Pang, Wancheng
AU  - Cao, Ying
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5267
AB  - The environmental impact of the mining industry requires efficient and eco-friendly technologies to mitigate the presence of mineral flotation reagents (MFRs) in mineral processing wastewater (MPW) prior to their discharge into the environment. In this work, for the first time, a robust, easily separable and reusable biocatalyst, Fe3O4@SiO2-NH2-Lac, was used for the degradation of a novel mineral flotation reagent 8-hydroxyquinoline (8-HQ). Under optimized conditions, Fe3O4@SiO2-NH2-Lac achieved 89.2% 8-HQ degradation efficiency within 6 h. The effect of the main constituents of MPW on 8-HQ degradation, including metal ions, organic solvents, surfactant, metal chelator and flotation frother was evaluated. The Fe3O4@SiO2-NH2-Lac also displayed favorable degradation efficiency of 8-HQ in real lead–zinc mine water. The biocatalyst could be easily recovered and had a satisfactory reusability, retaining 64.5% of 8-HQ degradation efficiency in the sixth reaction cycle. Identification of intermediate products revealed that Fe3O4@SiO2-NH2-Lac mediated reaction predominantly generated various structural 8-HQ oligomers/polymers. A potential degradation pathway for 8-HQ was speculated as follows: Fe3O4@SiO2-NH2-Lac initially catalyzed the oxidation of 8-HQ to yield the corresponding reactive radical intermediates, which subsequently undergone self-coupling reaction via C − C and C − O − C covalent coupling at their ortho and/or para positions, finally forming oligomers and polymers. The inhibition assays of marine bacterium (Vibrio fischeri) demonstrated that the toxicity of 8-HQ and its intermediate products was effectively reduced after Fe3O4@SiO2-NH2-Lac treatment. The results of this study might present an alternative immobilized laccase-based clean biotechnology for the clean-up and detoxification of 8-HQ contaminated MPW.
PB  - Elsevier
T2  - Chemical Engineering Journal
T1  - Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation
VL  - 432
SP  - 134239
DO  - 10.1016/j.cej.2021.134239
ER  - 

@article{
author = "Chen, Zhihui and Yao, Jun and Šolević Knudsen, Tatjana and Ma, Bo and Liu, Bang and Li, Haoa and Zhu, Xiaozhe and Zhao, Chenchen and Pang, Wancheng and Cao, Ying",
year = "2022",
abstract = "The environmental impact of the mining industry requires efficient and eco-friendly technologies to mitigate the presence of mineral flotation reagents (MFRs) in mineral processing wastewater (MPW) prior to their discharge into the environment. In this work, for the first time, a robust, easily separable and reusable biocatalyst, Fe3O4@SiO2-NH2-Lac, was used for the degradation of a novel mineral flotation reagent 8-hydroxyquinoline (8-HQ). Under optimized conditions, Fe3O4@SiO2-NH2-Lac achieved 89.2% 8-HQ degradation efficiency within 6 h. The effect of the main constituents of MPW on 8-HQ degradation, including metal ions, organic solvents, surfactant, metal chelator and flotation frother was evaluated. The Fe3O4@SiO2-NH2-Lac also displayed favorable degradation efficiency of 8-HQ in real lead–zinc mine water. The biocatalyst could be easily recovered and had a satisfactory reusability, retaining 64.5% of 8-HQ degradation efficiency in the sixth reaction cycle. Identification of intermediate products revealed that Fe3O4@SiO2-NH2-Lac mediated reaction predominantly generated various structural 8-HQ oligomers/polymers. A potential degradation pathway for 8-HQ was speculated as follows: Fe3O4@SiO2-NH2-Lac initially catalyzed the oxidation of 8-HQ to yield the corresponding reactive radical intermediates, which subsequently undergone self-coupling reaction via C − C and C − O − C covalent coupling at their ortho and/or para positions, finally forming oligomers and polymers. The inhibition assays of marine bacterium (Vibrio fischeri) demonstrated that the toxicity of 8-HQ and its intermediate products was effectively reduced after Fe3O4@SiO2-NH2-Lac treatment. The results of this study might present an alternative immobilized laccase-based clean biotechnology for the clean-up and detoxification of 8-HQ contaminated MPW.",
publisher = "Elsevier",
journal = "Chemical Engineering Journal",
title = "Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation",
volume = "432",
pages = "134239",
doi = "10.1016/j.cej.2021.134239"
}

Chen, Z., Yao, J., Šolević Knudsen, T., Ma, B., Liu, B., Li, H., Zhu, X., Zhao, C., Pang, W.,& Cao, Y.. (2022). Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation. in Chemical Engineering Journal
Elsevier., 432, 134239.
https://doi.org/10.1016/j.cej.2021.134239

Chen Z, Yao J, Šolević Knudsen T, Ma B, Liu B, Li H, Zhu X, Zhao C, Pang W, Cao Y. Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation. in Chemical Engineering Journal. 2022;432:134239.
doi:10.1016/j.cej.2021.134239 .

Chen, Zhihui, Yao, Jun, Šolević Knudsen, Tatjana, Ma, Bo, Liu, Bang, Li, Haoa, Zhu, Xiaozhe, Zhao, Chenchen, Pang, Wancheng, Cao, Ying, "Degradation of novel mineral flotation reagent 8-hydroxyquinoline by superparamagnetic immobilized laccase: Effect, mechanism and toxicity evaluation" in Chemical Engineering Journal, 432 (2022):134239,
https://doi.org/10.1016/j.cej.2021.134239 . .