Hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacin
This study presents a successful synthesis of natural magnetic silica (NMM@SiO2) materials modified with hydrophobic groups for the adsorption of two antibiotics, chloramphenicol (CAP) and ciprofloxacin (CIP). The NMM@SiO2 was prepared using natural magnetic material (NMM) isolated from iron sand, s...
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Elsevier
2024-12-01
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| Series: | Case Studies in Chemical and Environmental Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S266601642400272X |
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| author | Johnson Nune Naat Suyanta Suyanta Nuryono Nuryono |
| author_facet | Johnson Nune Naat Suyanta Suyanta Nuryono Nuryono |
| author_sort | Johnson Nune Naat |
| collection | DOAJ |
| description | This study presents a successful synthesis of natural magnetic silica (NMM@SiO2) materials modified with hydrophobic groups for the adsorption of two antibiotics, chloramphenicol (CAP) and ciprofloxacin (CIP). The NMM@SiO2 was prepared using natural magnetic material (NMM) isolated from iron sand, silica extracted from quart sand, and methyltrimethoxysilane (MTMS) as the hydrophobic precursor. The synthesized materials were characterized using various analytical techniques, including FTIR, XRD, VSM, TGA, TEM, and SEM-EDX-Mapping. Subsequently, the synthesized materials were used to adsorb antibiotics from an aqueous solution using a batch system, and the antibiotic concentration in the solution was measured with UV-VIS spectrophotometry. The characterization results confirmed the successful incorporation of MTMS onto NMM@SiO2. The adsorption studies indicated that the optimum pH for CAP and CIP adsorption were 5 and 6, respectively, with the optimum contact time being 120 min for CAP and 90 min for CIP, and the initial antibiotic concentrations of 200 mg L−1. The NMM@SiO2 (1.5 g) modified with 0.4 g (3.0 mmol) of MTMS to obtain NMM@SiO2/C1(3) exhibit the highest adsorption capacities for both antibiotics (58.46 mg g−1 for CAP and 106.81 mg g−1 for CIP). For both antibiotics tested, the kinetics and the adsorption isotherms followed pseudo-second-order and Freundlich models, respectively. The thermodynamic study indicated a negative ΔH (exothermic), positive ΔS (increase in randomness), and negative ΔG (spontaneous) for CAP and CIP. These results highlight the successful performance of this hydrophobic-based natural material adsorbent and demonstrate its potential as an effective adsorbent for antibiotic adsorption in aquatic environments. |
| format | Article |
| id | doaj-art-7dcc2181eb0d40c1a4e508bc2d718d68 |
| institution | DOAJ |
| issn | 2666-0164 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Case Studies in Chemical and Environmental Engineering |
| spelling | doaj-art-7dcc2181eb0d40c1a4e508bc2d718d682025-08-20T02:50:43ZengElsevierCase Studies in Chemical and Environmental Engineering2666-01642024-12-011010087810.1016/j.cscee.2024.100878Hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacinJohnson Nune Naat0Suyanta Suyanta1Nuryono Nuryono2Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia; Department of Chemistry Education, Faculty of Teacher Training and Education, Universitas Nusa Cendana, Kupang, 85001, NTT, IndonesiaDepartment of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, IndonesiaDepartment of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia; Corresponding author.This study presents a successful synthesis of natural magnetic silica (NMM@SiO2) materials modified with hydrophobic groups for the adsorption of two antibiotics, chloramphenicol (CAP) and ciprofloxacin (CIP). The NMM@SiO2 was prepared using natural magnetic material (NMM) isolated from iron sand, silica extracted from quart sand, and methyltrimethoxysilane (MTMS) as the hydrophobic precursor. The synthesized materials were characterized using various analytical techniques, including FTIR, XRD, VSM, TGA, TEM, and SEM-EDX-Mapping. Subsequently, the synthesized materials were used to adsorb antibiotics from an aqueous solution using a batch system, and the antibiotic concentration in the solution was measured with UV-VIS spectrophotometry. The characterization results confirmed the successful incorporation of MTMS onto NMM@SiO2. The adsorption studies indicated that the optimum pH for CAP and CIP adsorption were 5 and 6, respectively, with the optimum contact time being 120 min for CAP and 90 min for CIP, and the initial antibiotic concentrations of 200 mg L−1. The NMM@SiO2 (1.5 g) modified with 0.4 g (3.0 mmol) of MTMS to obtain NMM@SiO2/C1(3) exhibit the highest adsorption capacities for both antibiotics (58.46 mg g−1 for CAP and 106.81 mg g−1 for CIP). For both antibiotics tested, the kinetics and the adsorption isotherms followed pseudo-second-order and Freundlich models, respectively. The thermodynamic study indicated a negative ΔH (exothermic), positive ΔS (increase in randomness), and negative ΔG (spontaneous) for CAP and CIP. These results highlight the successful performance of this hydrophobic-based natural material adsorbent and demonstrate its potential as an effective adsorbent for antibiotic adsorption in aquatic environments.http://www.sciencedirect.com/science/article/pii/S266601642400272XAdsorptionChloramphenicolCiprofloxacinHydrophobicNatural magnetic materialsAnd silica |
| spellingShingle | Johnson Nune Naat Suyanta Suyanta Nuryono Nuryono Hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacin Case Studies in Chemical and Environmental Engineering Adsorption Chloramphenicol Ciprofloxacin Hydrophobic Natural magnetic materials And silica |
| title | Hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacin |
| title_full | Hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacin |
| title_fullStr | Hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacin |
| title_full_unstemmed | Hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacin |
| title_short | Hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacin |
| title_sort | hydrophobic modification of naturally magnetic silica with methyltrimethoxysilane for enhanced adsorption of chloramphenicol and ciprofloxacin |
| topic | Adsorption Chloramphenicol Ciprofloxacin Hydrophobic Natural magnetic materials And silica |
| url | http://www.sciencedirect.com/science/article/pii/S266601642400272X |
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