Superior elimination of Cr(VI) using polydopamine functionalized attapulgite supported nZVI composite: Behavior and mechanism
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2022
Authors
Ma, BoYao, Jun
Chen, Zhihui
Liu, Bang
Kim, Jonghyok
Zhao, Chenchen
Zhu, Xiaozhe
Mihucz, Victor G.
Minkina, Tatiana
Šolević Knudsen, Tatjana
Article (Published version)
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In this study, a polydopamine (PDA) modified attapulgite (ATP) supported nano sized zero-valent iron (nZVI) composite (PDA/ATP-nZVI) was rapidly synthesized under acidic conditions, and employed to alleviate Cr(VI) toxicity from an aqueous solution. Kinetic studies revealed that Cr(VI) adsorption process followed the pseudo-second order model, suggesting chemisorption was the dominant adsorption mechanism. Liu isotherm adsorption model was able to better describe the Cr(VI) adsorption isotherm with the maximum adsorption capacity of 134.05 mg/g. The thermodynamic study demonstrated that the adsorption process occurred spontaneously, accompanied by the increase in entropy and endothermic reaction. Low concentrations of coexisting ions had negligible effects on the removal of Cr(VI), while high concentrations of interfering ions were able to facilitate the removal of Cr(VI). Reactive species test revealed that Fe2+ played a key role in Cr(VI) reduction by PDA/ATP-nZVI. PDA enhanced the e...limination of Cr(VI) via donation of electrons to Cr(VI) and acceleration of Fe3+ transformation to Fe2+. Furthermore, PDA was able to effectively inhibit the leaching of iron species and generation of ferric hydroxide sludge. Mechanistic study revealed that 72% of Cr(VI) elimination was attributed to reduction/precipitation, while 28% of Cr(VI) elimination was due to the surface adsorption.
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Keywords:
Adsorption / Attapulgite supported nanosized zero-valent iron / Hexavalent chromuim / Polydopamine / ReductionSource:
Chemosphere, 2022, 287, 131970-Publisher:
- Elsevier
Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM) (RS-MESTD-inst-2020-200026)
- The National Natural Science Foundation of China (41720104007)
- The National Natural Science Foundation of China ( 41430106)
- Тhe Major National R & D Projects for Chinese Ministry of Science and Technology (2019YFC1803500)
- Тhe Sino-Hungarian project under contract number 2018–2.1.14- T´ET-CN-2018-00022
DOI: 10.1016/j.chemosphere.2021.131970
ISSN: 0045-6535
PubMed: 34450370
WoS: 000704783300002
Scopus: 2-s2.0-85113401935
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IHTMTY - JOUR AU - Ma, Bo AU - Yao, Jun AU - Chen, Zhihui AU - Liu, Bang AU - Kim, Jonghyok AU - Zhao, Chenchen AU - Zhu, Xiaozhe AU - Mihucz, Victor G. AU - Minkina, Tatiana AU - Šolević Knudsen, Tatjana PY - 2022 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4759 AB - In this study, a polydopamine (PDA) modified attapulgite (ATP) supported nano sized zero-valent iron (nZVI) composite (PDA/ATP-nZVI) was rapidly synthesized under acidic conditions, and employed to alleviate Cr(VI) toxicity from an aqueous solution. Kinetic studies revealed that Cr(VI) adsorption process followed the pseudo-second order model, suggesting chemisorption was the dominant adsorption mechanism. Liu isotherm adsorption model was able to better describe the Cr(VI) adsorption isotherm with the maximum adsorption capacity of 134.05 mg/g. The thermodynamic study demonstrated that the adsorption process occurred spontaneously, accompanied by the increase in entropy and endothermic reaction. Low concentrations of coexisting ions had negligible effects on the removal of Cr(VI), while high concentrations of interfering ions were able to facilitate the removal of Cr(VI). Reactive species test revealed that Fe2+ played a key role in Cr(VI) reduction by PDA/ATP-nZVI. PDA enhanced the elimination of Cr(VI) via donation of electrons to Cr(VI) and acceleration of Fe3+ transformation to Fe2+. Furthermore, PDA was able to effectively inhibit the leaching of iron species and generation of ferric hydroxide sludge. Mechanistic study revealed that 72% of Cr(VI) elimination was attributed to reduction/precipitation, while 28% of Cr(VI) elimination was due to the surface adsorption. (1-4) in order to obtain adherence, e.g., PB - Elsevier T2 - Chemosphere T1 - Superior elimination of Cr(VI) using polydopamine functionalized attapulgite supported nZVI composite: Behavior and mechanism VL - 287 SP - 131970 DO - 10.1016/j.chemosphere.2021.131970 ER -
@article{ author = "Ma, Bo and Yao, Jun and Chen, Zhihui and Liu, Bang and Kim, Jonghyok and Zhao, Chenchen and Zhu, Xiaozhe and Mihucz, Victor G. and Minkina, Tatiana and Šolević Knudsen, Tatjana", year = "2022", abstract = "In this study, a polydopamine (PDA) modified attapulgite (ATP) supported nano sized zero-valent iron (nZVI) composite (PDA/ATP-nZVI) was rapidly synthesized under acidic conditions, and employed to alleviate Cr(VI) toxicity from an aqueous solution. Kinetic studies revealed that Cr(VI) adsorption process followed the pseudo-second order model, suggesting chemisorption was the dominant adsorption mechanism. Liu isotherm adsorption model was able to better describe the Cr(VI) adsorption isotherm with the maximum adsorption capacity of 134.05 mg/g. The thermodynamic study demonstrated that the adsorption process occurred spontaneously, accompanied by the increase in entropy and endothermic reaction. Low concentrations of coexisting ions had negligible effects on the removal of Cr(VI), while high concentrations of interfering ions were able to facilitate the removal of Cr(VI). Reactive species test revealed that Fe2+ played a key role in Cr(VI) reduction by PDA/ATP-nZVI. PDA enhanced the elimination of Cr(VI) via donation of electrons to Cr(VI) and acceleration of Fe3+ transformation to Fe2+. Furthermore, PDA was able to effectively inhibit the leaching of iron species and generation of ferric hydroxide sludge. Mechanistic study revealed that 72% of Cr(VI) elimination was attributed to reduction/precipitation, while 28% of Cr(VI) elimination was due to the surface adsorption. (1-4) in order to obtain adherence, e.g.,", publisher = "Elsevier", journal = "Chemosphere", title = "Superior elimination of Cr(VI) using polydopamine functionalized attapulgite supported nZVI composite: Behavior and mechanism", volume = "287", pages = "131970", doi = "10.1016/j.chemosphere.2021.131970" }
Ma, B., Yao, J., Chen, Z., Liu, B., Kim, J., Zhao, C., Zhu, X., Mihucz, V. G., Minkina, T.,& Šolević Knudsen, T.. (2022). Superior elimination of Cr(VI) using polydopamine functionalized attapulgite supported nZVI composite: Behavior and mechanism. in Chemosphere Elsevier., 287, 131970. https://doi.org/10.1016/j.chemosphere.2021.131970
Ma B, Yao J, Chen Z, Liu B, Kim J, Zhao C, Zhu X, Mihucz VG, Minkina T, Šolević Knudsen T. Superior elimination of Cr(VI) using polydopamine functionalized attapulgite supported nZVI composite: Behavior and mechanism. in Chemosphere. 2022;287:131970. doi:10.1016/j.chemosphere.2021.131970 .
Ma, Bo, Yao, Jun, Chen, Zhihui, Liu, Bang, Kim, Jonghyok, Zhao, Chenchen, Zhu, Xiaozhe, Mihucz, Victor G., Minkina, Tatiana, Šolević Knudsen, Tatjana, "Superior elimination of Cr(VI) using polydopamine functionalized attapulgite supported nZVI composite: Behavior and mechanism" in Chemosphere, 287 (2022):131970, https://doi.org/10.1016/j.chemosphere.2021.131970 . .