Waste expanded polystyrene modified with H2SO4/biodegradable chelating agent for reuse: As a highly efficient adsorbent to remove fluoroquinolone antibiotic from water

doi:10.1016/j.chemosphere.2021.132619

中山醫學大學機構典藏 CSMUIR > 中山醫學大學研究成果 > 期刊論文 > Item 310902500/23966

Please use this identifier to cite or link to this item: https://ir.csmu.edu.tw:8080/ir/handle/310902500/23966

Title:	Waste expanded polystyrene modified with H2SO4/biodegradable chelating agent for reuse: As a highly efficient adsorbent to remove fluoroquinolone antibiotic from water
Authors:	Chang, SH;Lu, CC;Lin, CW;Wang, KS;Lee, MW;Liu, SH
Keywords:	Waste expanded polystyrene;[S,S]-ethylenediamine-N,N '-disuccinic acid (EDDS);Fluoroquinolone antibiotic;Adsorption;Regeneration
Date:	2021
Issue Date:	2022-08-05T09:45:42Z (UTC)
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
ISSN:	0045-6535
Abstract:	Untreated wastewater containing fluoroquinolone antibiotics poses serious hazards to aquatic species and human health; therefore, treatment of waste expanded polystyrene (EPS) is a crucial environmental matter. In this study, waste EPS was modified with a H2SO4/biodegradable chelating agent, [S,S]-ethylenediamine-N,N'-disuccinic acid (EDDS), and used for highly efficient adsorption of the fluoroquinolone antibiotic ciprofloxacin. When ciprofloxacin of 25 mg/L was used, the H2SO4-modified EPS (EPSH2SO4) adsorbed 60.5% of the ciprofloxacin. During sulfonation, adding a low dose of EDDS markedly improved the adsorption ability of EPSH2SO4+EDDS. The optimal modification conditions were 95% H2SO4, 0.002 M EDDS, 80 degrees C, and 40 min. The increased adsorbent doses enhanced the adsorption. Approximately 0.2 g/L of EPSH2SO4+EDDS could effectively adsorb 97.8% of the ciprofloxacin (554.3 mg/g) within 30 min. Solution pH(0) greatly influenced the adsorption, and the most suitable pH o was 6. The Langmuir isotherm accurately described the adsorption behaviors of both EPSH2SO4 and EPSH2SO4+EDDS (R-2 = 0.997-0.998). The adsorption ability of ERSH2SO4+EDDS (q(max) = 1250 mg/g) was 32 times higher than that of EPSH2SO4 (q(max) = 38.6 mg/g). A total of 1 M HCl effectively regenerated the exhausted adsorbent. The optimal solid/liquid ratio and time were 0.08 g/20 mL and 60 min, respectively. The regenerated EPSH2SO4+EDDS maintained a high adsorption ability (87.2%) after 10 regeneration cycles. The results thus indicate that the EPSH2SO4+EDDS adsorption-regeneration process is a potential approach to remove ciprofloxacin from water.
URI:	http://dx.doi.org/10.1016/j.chemosphere.2021.132619 https://www.webofscience.com/wos/woscc/full-record/WOS:000734125000009 https://ir.csmu.edu.tw:8080/handle/310902500/23966
Relation:	CHEMOSPHERE ,2022,v288
Appears in Collections:	[中山醫學大學研究成果] 期刊論文

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