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自然和改性粘土作为低成本和环保的材料,可以从环境组件中去除沙利诺米辛

Samiha Hamdi¹, Ainoa Míguez-González², Raquel Cela-Dablanca²

¹Department of Biotechnology, Faculty of Science and Technology of Sidi Bouzid, University of Kairouan, 9100, Sidi Bouzid, Tunisia; Department Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, 27002, Lugo, Spain; Laboratory of Nutrition - Functional Foods and Health (NAFS)-LR12ES05, Faculty of Medicine, University of Monastir, Avenue Avicenne 5019, Monastir, Tunisia.

Journal of environmental management

|August 16, 2024

概括

粘土有效吸附抗生素沙利诺米 (SAL),这是一个重要的环境污染物. 改性和原始粘土为从水和土壤中去除SAL提供了具有成本效益的解决方案,有助于环境修复.

科学领域:

环境科学环境科学
环境化学环境化学
材料科学材料科学材料科学

背景情况:

抗生素,特别是像沙利诺米辛 (SAL) 这样的离子体抗杀菌剂,由于它们的生态影响和在抗菌素耐药性中的作用,造成了严重的污染威胁.
从环境中去除这些新出现的污染物的有效方法对于减轻对生态系统和人类健康的风险至关重要.

研究的目的:

为了研究沙利诺米 (SAL) 在原始和改性粘土吸附剂上的吸附和脱吸特性.
评估这些粘土在环境中对抗生素污染的补救方面的潜力.

主要方法:

用三种不同矿物质成分的粘土 (AM,HJ1,HJ2) 进行了批量吸附/脱附实验.
在不同的pH范围 (酸性,天然性,基本性) 和SAL度 (5-100μmol L-1) 上进行了实验.
用紫外线检测 (HPLC-UV) 的高性能液体染色学用于SAL量化,并使用弗洛因利希,兰穆尔和线性模型来拟合吸附数据.

主要成果:

超过98%的SAL在低度 (5-20μmol L−1) 的情况下被大多数粘土强烈吸收,不管粘土的成分或pH值如何.
在较高的SAL度 (40-100μmol L-1),吸附表现出pH依赖的行为,自然/基质激活的pH随着增加而下降,而酸激活的pH随着降低而略有下降.
弗朗德利希模型最好地描述了SAL吸附,并且脱附率始终很低 (<10%,<20%在较高度下),特别是在酸激活的粘土中,这表明结合强.

结论:

原料和改性粘土是有效的,具有成本效益的吸附剂,用于从水溶液中去除兽医抗生素SAL.
这些粘土显示出环境修复应用的巨大潜力,包括土壤修改和水处理,以打击抗生素污染.
强吸附和低脱吸表明,这些粘土可以固定SAL,降低其环境生物利用率和传播.

关键词:

吸附方式吸附方式吸附方式克莱斯·克莱斯是什么意思脱吸方式脱吸方式新兴污染物新兴污染物环境环境环境环境沙利诺米辛是一种菌素.

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