Sorption mechansim of pharmaceuticals from aqueous medium on ionic liquid modified biomass
Sorption mechansim of pharmaceuticals from aqueous medium on ionic liquid modified biomass
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DOI：
10.1002/jctb.5063
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发表时间：
2017-04
影响因子：
3.4
通讯作者：
I. Lawal;B. Moodley
中科院分区：
文献类型：
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作者：
I. Lawal;B. Moodley
背景抗生素的全球使用已经成为一个严重的问题，因为它存在于环境中时会产生各种潜在的不良影响。据报道，急性和慢性毒性、对水生生物的影响、微生物种群的破坏以及对抗生素耐药基因的传播都与药物有关。因此，本研究旨在探讨水介质中部分药物对离子液体修饰生物质的修复机理。结果研究了药物在生物体和离子液体修饰生物体上的吸附机理。用IL对Kigelia pinnata(KP)进行了修饰，形成了改性生物量(KP-IL)。考察的药物为布洛芬(IBU)、酮洛芬(KET)、氨苄西林(AMP)和双氯芬酸(DCL)。AMP的最佳吸附条件为pH 2.5，IBU、KET和DCL的最佳吸附条件为pH 5。所有药物的吸附数据均符合准二级动力学和朗缪尔吸附等温式。最大吸附容量分别为251.2、197.1、276.8和73 mg g−1。结论KP-IL是一种良好的药物修复材料，其吸附性能远好于文献报道的未修饰KP和生物体。©2016化学工业学会
BACKGROUND The global use of antibiotics has become a serious concern because of its variety of potential adverse effects when present in the environment. Acute and chronic toxicity, impact on aquatic organisms, disruption of microbial populations, and dissemination into antibiotic-resistant genes have reportedly been linked to pharmaceuticals. Therefore, the aim of this study was to investigate the mechanism of remediation of some selected pharmaceuticals in aqueous medium on ionic liquid modified biomass. RESULTS The mechanism of sorption of pharmaceuticals on biomass and biomass modified with an ionic liquid (IL) was investigated. Kigelia pinnata (KP) was modified with IL to form modified biomass (KP-IL). The pharmaceuticals investigated were ibuprofen (IBU), ketoprofen (KET), ampicillin (AMP) and diclofenac (DCL). Optimum adsorption was at pH 2.5 for AMP and pH 5 for IBU, KET and DCL. Sorption data for all the pharmaceuticals were best described by pseudo-second-order kinetics and the Langmuir adsorption isotherm. Maximum sorption capacities of 251.2, 197.1, 276.8 and 73 mg g−1 were obtained for KET, DCL, IBU and AMP, respectively. CONCLUSION The study showed that KP-IL is a good material for the remediation of pharmaceuticals, and the adsorption capacity was far better than that of the unmodified KP and biomasses previously reported in literature. © 2016 Society of Chemical Industry