TY  - CONF
AU  - Bošnjaković, Jovana
AU  - Đuričković, Ivan
AU  - Milanovic, Jovana
AU  - Grujić, Dragana
AU  - Marinković, Aleksandar
AU  - Manasijević, Srećko
AU  - Milošević, Milena
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7056
AB  - In the last decades, the rapid development of industrial and agricultural activity caused the release of different organic/or nonorganic pollutants in water, earth, and air which lead to a threat to human health and the ecological environment. These pollutants contain toxic heavy metals, organic dyes, pesticides, pharmaceutics, and others (Aboua et al., 2015). Organic dyes are visible pollutants used as coloring agents in, textiles, plastics, paper, food industries, etc. For their removal from wastewater, eco-friendly treatment is needed. Among many process purification, the process of adsorption proved to be an effective method for removing pollutants that are present in water, such as pesticides, dyes, and heavy metal ions. Due to the specific properties of polluting substances, the goal is to develop a cheap, efficient, environmentally friendly material. Among them, cotton-based materials can be obtained from various natural sources and can be employed as inexpensive adsorbents. Their adsorption capacities for pollutants can be related to chemical treatment. In general, chemically modified cellulose exhibits higher adsorption capacities for various aquatic pollutants than their unmodified forms. In this aim, oxidized cotton fabric was used in this work, which was chemically modified with citric acid and ethyl lysinate, respectively. In order to activate the surface of the fabric for chemical modification and increase absorption ability, carboxyl and aldehyde functional groups were introduced using hydrogen peroxide. Then the oxidized cotton fabric was cross-linked with citric acid and ethyl lysinate (Co-CA-Et-Lys) using diisopropylcarboimide to promote ester and amide groups formation. The structure of obtained material was analyzed by using the ATR-FTIR technique. The resulting modified fabric proved to be a good adsorbent for the removal of cationic dyes malachite green (MG) and methylene blue (MB). Its adsorption behavior with respect to the pH, adsorption time, and initial concentration was investigated. Based on the obtained results, it was concluded that the adsorption equilibrium was reached after 1 h for both Malachite Green (MG) and Methylene Blue (MB). Adsorption kinetics data were satisfactorily fitted with the pseudo-second-order rate model (PSO), and adsorption data were best fitted using Langmuir model. The Langmuir maximum adsorption capacities for Co-CA-Et-Lys cross-linked fabric showed a maximum of 168.4 mg/g and 124.9 mg/g for MG and MB, respectively. Compared to other adsorbents based on natural materials, oxidized cotton fabric showed much better sorption properties.
PB  - Zvornik : Faculty of Technology
C3  - Proceedings - 8th International Congress “Engineering, Environment and Materials in Process Industry“ – EEM2023, 20-23 March 2023, Jahorina, Republic of Srpska, Bosnia and Herzegovina
T1  - Oxidized cotton fabric cross-linked with citric acid and ethyl lysinate for cationic dyes adsorption
SP  - 310
EP  - 316
UR  - https://hdl.handle.net/21.15107/rcub_cer_7056
ER  - 

@conference{
author = "Bošnjaković, Jovana and Đuričković, Ivan and Milanovic, Jovana and Grujić, Dragana and Marinković, Aleksandar and Manasijević, Srećko and Milošević, Milena",
year = "2023",
abstract = "In the last decades, the rapid development of industrial and agricultural activity caused the release of different organic/or nonorganic pollutants in water, earth, and air which lead to a threat to human health and the ecological environment. These pollutants contain toxic heavy metals, organic dyes, pesticides, pharmaceutics, and others (Aboua et al., 2015). Organic dyes are visible pollutants used as coloring agents in, textiles, plastics, paper, food industries, etc. For their removal from wastewater, eco-friendly treatment is needed. Among many process purification, the process of adsorption proved to be an effective method for removing pollutants that are present in water, such as pesticides, dyes, and heavy metal ions. Due to the specific properties of polluting substances, the goal is to develop a cheap, efficient, environmentally friendly material. Among them, cotton-based materials can be obtained from various natural sources and can be employed as inexpensive adsorbents. Their adsorption capacities for pollutants can be related to chemical treatment. In general, chemically modified cellulose exhibits higher adsorption capacities for various aquatic pollutants than their unmodified forms. In this aim, oxidized cotton fabric was used in this work, which was chemically modified with citric acid and ethyl lysinate, respectively. In order to activate the surface of the fabric for chemical modification and increase absorption ability, carboxyl and aldehyde functional groups were introduced using hydrogen peroxide. Then the oxidized cotton fabric was cross-linked with citric acid and ethyl lysinate (Co-CA-Et-Lys) using diisopropylcarboimide to promote ester and amide groups formation. The structure of obtained material was analyzed by using the ATR-FTIR technique. The resulting modified fabric proved to be a good adsorbent for the removal of cationic dyes malachite green (MG) and methylene blue (MB). Its adsorption behavior with respect to the pH, adsorption time, and initial concentration was investigated. Based on the obtained results, it was concluded that the adsorption equilibrium was reached after 1 h for both Malachite Green (MG) and Methylene Blue (MB). Adsorption kinetics data were satisfactorily fitted with the pseudo-second-order rate model (PSO), and adsorption data were best fitted using Langmuir model. The Langmuir maximum adsorption capacities for Co-CA-Et-Lys cross-linked fabric showed a maximum of 168.4 mg/g and 124.9 mg/g for MG and MB, respectively. Compared to other adsorbents based on natural materials, oxidized cotton fabric showed much better sorption properties.",
publisher = "Zvornik : Faculty of Technology",
journal = "Proceedings - 8th International Congress “Engineering, Environment and Materials in Process Industry“ – EEM2023, 20-23 March 2023, Jahorina, Republic of Srpska, Bosnia and Herzegovina",
title = "Oxidized cotton fabric cross-linked with citric acid and ethyl lysinate for cationic dyes adsorption",
pages = "310-316",
url = "https://hdl.handle.net/21.15107/rcub_cer_7056"
}

Bošnjaković, J., Đuričković, I., Milanovic, J., Grujić, D., Marinković, A., Manasijević, S.,& Milošević, M.. (2023). Oxidized cotton fabric cross-linked with citric acid and ethyl lysinate for cationic dyes adsorption. in Proceedings - 8th International Congress “Engineering, Environment and Materials in Process Industry“ – EEM2023, 20-23 March 2023, Jahorina, Republic of Srpska, Bosnia and Herzegovina
Zvornik : Faculty of Technology., 310-316.
https://hdl.handle.net/21.15107/rcub_cer_7056

Bošnjaković J, Đuričković I, Milanovic J, Grujić D, Marinković A, Manasijević S, Milošević M. Oxidized cotton fabric cross-linked with citric acid and ethyl lysinate for cationic dyes adsorption. in Proceedings - 8th International Congress “Engineering, Environment and Materials in Process Industry“ – EEM2023, 20-23 March 2023, Jahorina, Republic of Srpska, Bosnia and Herzegovina. 2023;:310-316.
https://hdl.handle.net/21.15107/rcub_cer_7056 .

Bošnjaković, Jovana, Đuričković, Ivan, Milanovic, Jovana, Grujić, Dragana, Marinković, Aleksandar, Manasijević, Srećko, Milošević, Milena, "Oxidized cotton fabric cross-linked with citric acid and ethyl lysinate for cationic dyes adsorption" in Proceedings - 8th International Congress “Engineering, Environment and Materials in Process Industry“ – EEM2023, 20-23 March 2023, Jahorina, Republic of Srpska, Bosnia and Herzegovina (2023):310-316,
https://hdl.handle.net/21.15107/rcub_cer_7056 .

TY  - CONF
AU  - Milošević, Milena
AU  - Jovanović, Aleksandra A.
AU  - Batinić, Petar M.
AU  - Grujić, Dragana
AU  - Knežević, Nataša
AU  - Marinković, Aleksandar
AU  - Milanović, Jovana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7338
AB  - The plants contain a large number of various compounds that exhibit significant antioxidant 
activity. Among them, polyphenols and flavonoids are the most studied compounds with different 
biological properties, including antioxidant activity. The functionalization of cotton fabric with natural compounds from plants results in the material with improved antioxidative properties. In this study, cotton fabrics treated with ethanol and water Thymus serpyllum L. (wild thyme) extracts were investigated in terms of antioxidant properties and chemical composition. In vitro antioxidant capacity of ethanol and water extracts, and the cotton fabric before and after functionalization was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH•), and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS•+) radicals scavenging capacity assays. FTIR and UV–Vis spectroscopy elucidated the structure of the cotton fabric, extracts, and functionalized cotton fabric. FTIR spectroscopy demonstrated that the structure of cellulose was dominated in cotton, and also proved the presence of a low percentage of protein, pectin, oil, fat, and wax, as well as, binding of compounds from the extract by cross-linking with long chains of structure cotton. In dry extracts, the presence of various chemical functional groups was confirmed. UV-Vis analysis identified the active components in T. serpyllum extracts. Namely, absorption values for both spectra (water and ethanol samples) at 215-253 nm, 263-384 nm, are specific for phenolic acids, and flavonoids. Also, one of the aims of the study was to investigate the influence of various extracts (water and ethanol samples) on the antioxidant activity of cotton fabric. All extracts demonstrated excellent antioxidant properties, more potent than the reference antioxidant (ascorbic acid) in both antioxidant assays (between 85-86% in DPPH and 94-96% in ABTS assays). Pure T. serpyllum water extract was the most potent in the DPPH assay (86%), while pure ethanolic extract was the most potent antioxidant in the ABTS assay (96%). The antioxidant capacity of raw cotton fabric was insufficient (4%). On the other hand, in the DPPH assay, samples of cotton fabric with extract showed moderate activity with scavenging activity of 48% and 45% for ethanol and water extracts, respectively. Additionally,
in the ABTS assay, the antioxidant activity of treated cotton fabric was 51% and 46% for ethanol 
and water extracts, respectively.
PB  - Zvornik : University of East Sarajevo, Faculty of Technology
C3  - Proceedings - VIII International Congress "Engineering, Environment and Materials in Process Industry", EEM 2023, March 20-23 2023, Jahorina
T1  - In vitro antioxidant activity of cotton fabric treated with ethanol and water Thymus serpyllum L. (wild thyme) extracts
SP  - 128
EP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_cer_7338
ER  - 

@conference{
author = "Milošević, Milena and Jovanović, Aleksandra A. and Batinić, Petar M. and Grujić, Dragana and Knežević, Nataša and Marinković, Aleksandar and Milanović, Jovana",
year = "2023",
abstract = "The plants contain a large number of various compounds that exhibit significant antioxidant 
activity. Among them, polyphenols and flavonoids are the most studied compounds with different 
biological properties, including antioxidant activity. The functionalization of cotton fabric with natural compounds from plants results in the material with improved antioxidative properties. In this study, cotton fabrics treated with ethanol and water Thymus serpyllum L. (wild thyme) extracts were investigated in terms of antioxidant properties and chemical composition. In vitro antioxidant capacity of ethanol and water extracts, and the cotton fabric before and after functionalization was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH•), and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS•+) radicals scavenging capacity assays. FTIR and UV–Vis spectroscopy elucidated the structure of the cotton fabric, extracts, and functionalized cotton fabric. FTIR spectroscopy demonstrated that the structure of cellulose was dominated in cotton, and also proved the presence of a low percentage of protein, pectin, oil, fat, and wax, as well as, binding of compounds from the extract by cross-linking with long chains of structure cotton. In dry extracts, the presence of various chemical functional groups was confirmed. UV-Vis analysis identified the active components in T. serpyllum extracts. Namely, absorption values for both spectra (water and ethanol samples) at 215-253 nm, 263-384 nm, are specific for phenolic acids, and flavonoids. Also, one of the aims of the study was to investigate the influence of various extracts (water and ethanol samples) on the antioxidant activity of cotton fabric. All extracts demonstrated excellent antioxidant properties, more potent than the reference antioxidant (ascorbic acid) in both antioxidant assays (between 85-86% in DPPH and 94-96% in ABTS assays). Pure T. serpyllum water extract was the most potent in the DPPH assay (86%), while pure ethanolic extract was the most potent antioxidant in the ABTS assay (96%). The antioxidant capacity of raw cotton fabric was insufficient (4%). On the other hand, in the DPPH assay, samples of cotton fabric with extract showed moderate activity with scavenging activity of 48% and 45% for ethanol and water extracts, respectively. Additionally,
in the ABTS assay, the antioxidant activity of treated cotton fabric was 51% and 46% for ethanol 
and water extracts, respectively.",
publisher = "Zvornik : University of East Sarajevo, Faculty of Technology",
journal = "Proceedings - VIII International Congress "Engineering, Environment and Materials in Process Industry", EEM 2023, March 20-23 2023, Jahorina",
title = "In vitro antioxidant activity of cotton fabric treated with ethanol and water Thymus serpyllum L. (wild thyme) extracts",
pages = "128-135",
url = "https://hdl.handle.net/21.15107/rcub_cer_7338"
}

Milošević, M., Jovanović, A. A., Batinić, P. M., Grujić, D., Knežević, N., Marinković, A.,& Milanović, J.. (2023). In vitro antioxidant activity of cotton fabric treated with ethanol and water Thymus serpyllum L. (wild thyme) extracts. in Proceedings - VIII International Congress "Engineering, Environment and Materials in Process Industry", EEM 2023, March 20-23 2023, Jahorina
Zvornik : University of East Sarajevo, Faculty of Technology., 128-135.
https://hdl.handle.net/21.15107/rcub_cer_7338

Milošević M, Jovanović AA, Batinić PM, Grujić D, Knežević N, Marinković A, Milanović J. In vitro antioxidant activity of cotton fabric treated with ethanol and water Thymus serpyllum L. (wild thyme) extracts. in Proceedings - VIII International Congress "Engineering, Environment and Materials in Process Industry", EEM 2023, March 20-23 2023, Jahorina. 2023;:128-135.
https://hdl.handle.net/21.15107/rcub_cer_7338 .

Milošević, Milena, Jovanović, Aleksandra A., Batinić, Petar M., Grujić, Dragana, Knežević, Nataša, Marinković, Aleksandar, Milanović, Jovana, "In vitro antioxidant activity of cotton fabric treated with ethanol and water Thymus serpyllum L. (wild thyme) extracts" in Proceedings - VIII International Congress "Engineering, Environment and Materials in Process Industry", EEM 2023, March 20-23 2023, Jahorina (2023):128-135,
https://hdl.handle.net/21.15107/rcub_cer_7338 .

TY  - JOUR
AU  - Grujić, Dragana
AU  - Savić, Aleksandar
AU  - Papuga, Saša
AU  - Milošević, Milena
AU  - Kolar, Mitja
AU  - Milanović, Predrag
AU  - Milanović, Jovana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7196
AB  - The study aimed to estimate the influence of temperature, time, and ultrasound application during desizing and scouring of cotton with α-amylase and pectinase, respectively, on the weight loss, breaking force and color difference between raw and bio-scoured cotton, to obtain purified and hydrophilic cotton, with a simultaneous slight decrease in mechanical properties. Under the optimal conditions, determined by the application of Response Surface Methodology (time – 30 min, temperature – 59.4 °C, with ultrasound treatment), a weight loss of 4.97%, color difference of 3.86, and a breaking force of 730.22N were obtained. The bio-scoured cotton fabric was also characterized in terms of electrokinetic and sorption properties, chemical composition and morphology of the cotton surface by zeta-potential measurement, wicking and contact angle determination, FTIR and SEM characterization, respectively. The developed enzymatic scouring process leads to obtaining purified, whiter and hydrophilic cotton, with slight changes in mechanical properties, which makes bio-scoured cotton fabric suitable for further wet processing.
PB  - Publishing House of the Romanian Academy
T2  - Cellulose Chemistry and Technology
T1  - Optimization of Enzymatic Desizing and Scouring of Cotton Fabric by Response Surface Methodology
VL  - 57
IS  - 1-2
SP  - 167
EP  - 184
DO  - 10.35812/CelluloseChemTechnol.2023.57.17
ER  - 

@article{
author = "Grujić, Dragana and Savić, Aleksandar and Papuga, Saša and Milošević, Milena and Kolar, Mitja and Milanović, Predrag and Milanović, Jovana",
year = "2023",
abstract = "The study aimed to estimate the influence of temperature, time, and ultrasound application during desizing and scouring of cotton with α-amylase and pectinase, respectively, on the weight loss, breaking force and color difference between raw and bio-scoured cotton, to obtain purified and hydrophilic cotton, with a simultaneous slight decrease in mechanical properties. Under the optimal conditions, determined by the application of Response Surface Methodology (time – 30 min, temperature – 59.4 °C, with ultrasound treatment), a weight loss of 4.97%, color difference of 3.86, and a breaking force of 730.22N were obtained. The bio-scoured cotton fabric was also characterized in terms of electrokinetic and sorption properties, chemical composition and morphology of the cotton surface by zeta-potential measurement, wicking and contact angle determination, FTIR and SEM characterization, respectively. The developed enzymatic scouring process leads to obtaining purified, whiter and hydrophilic cotton, with slight changes in mechanical properties, which makes bio-scoured cotton fabric suitable for further wet processing.",
publisher = "Publishing House of the Romanian Academy",
journal = "Cellulose Chemistry and Technology",
title = "Optimization of Enzymatic Desizing and Scouring of Cotton Fabric by Response Surface Methodology",
volume = "57",
number = "1-2",
pages = "167-184",
doi = "10.35812/CelluloseChemTechnol.2023.57.17"
}

Grujić, D., Savić, A., Papuga, S., Milošević, M., Kolar, M., Milanović, P.,& Milanović, J.. (2023). Optimization of Enzymatic Desizing and Scouring of Cotton Fabric by Response Surface Methodology. in Cellulose Chemistry and Technology
Publishing House of the Romanian Academy., 57(1-2), 167-184.
https://doi.org/10.35812/CelluloseChemTechnol.2023.57.17

Grujić D, Savić A, Papuga S, Milošević M, Kolar M, Milanović P, Milanović J. Optimization of Enzymatic Desizing and Scouring of Cotton Fabric by Response Surface Methodology. in Cellulose Chemistry and Technology. 2023;57(1-2):167-184.
doi:10.35812/CelluloseChemTechnol.2023.57.17 .

Grujić, Dragana, Savić, Aleksandar, Papuga, Saša, Milošević, Milena, Kolar, Mitja, Milanović, Predrag, Milanović, Jovana, "Optimization of Enzymatic Desizing and Scouring of Cotton Fabric by Response Surface Methodology" in Cellulose Chemistry and Technology, 57, no. 1-2 (2023):167-184,
https://doi.org/10.35812/CelluloseChemTechnol.2023.57.17 . .