Adsorption behavior of aniline pollutant on polystyrene microplastics

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere Pub Date : 2023-05-01 DOI:10.1016/j.chemosphere.2023.138187

Zhenyu Chen , Jinchan Yang , Duanyi Huang , Shuni Wang , Kai Jiang , Weimin Sun , Zhihua Chen , Zhiguo Cao , Youhua Ren , Qi Wang , Huaqing Liu , Xin Zhang , Xiaoxu Sun

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引用次数: 10

Abstract

Microplastic contamination is ubiquitous in aquatic environments. As global plastic production increases, the abundance of microplastic contaminants released into the environment has also continued to soar. The hydrophobic surfaces of plastic particles can adsorb a variety of chemical pollutants, and could therefore facilitate toxin accumulation through the food chain. In this study, the adsorption behavior of aniline, a priority environmental pollutant from industrial production, on the surface of polystyrene microplastics (mPS) was investigated. The results showed that the maximum adsorption capacity of mPS was 0.060 mg/g. Adsorption equilibrium was reached after 24 h, and the pseudo-second-order model was employed to explain the adsorption kinetics of aniline on the mPS particles. The Freundlich models could describe the adsorption isotherms. The potential adsorption mechanisms may include π-π interactions and hydrophobic interactions. pH, ionic strength, and ambient temperature of the solution played important roles in the adsorption process.

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苯胺类污染物在聚苯乙烯微塑料上的吸附行为

微塑料污染在水生环境中无处不在。随着全球塑料产量的增加，释放到环境中的微塑料污染物的丰度也在继续飙升。塑料颗粒的疏水表面可以吸附多种化学污染物，因此可以促进毒素通过食物链积累。研究了工业生产中产生的主要环境污染物苯胺在聚苯乙烯微塑料(mPS)表面的吸附行为。结果表明，mPS的最大吸附量为0.060 mg/g。24h后达到吸附平衡，采用拟二阶模型解释苯胺在mPS颗粒上的吸附动力学。Freundlich模型可以描述吸附等温线。潜在的吸附机制可能包括π-π相互作用和疏水相互作用。溶液的pH、离子强度和环境温度对吸附过程有重要影响。

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来源期刊

Chemosphere 环境科学-环境科学

CiteScore

15.80

自引率

8.00%

发文量

4975

审稿时长

3.4 months

期刊介绍： Chemosphere, being an international multidisciplinary journal, is dedicated to publishing original communications and review articles on chemicals in the environment. The scope covers a wide range of topics, including the identification, quantification, behavior, fate, toxicology, treatment, and remediation of chemicals in the bio-, hydro-, litho-, and atmosphere, ensuring the broad dissemination of research in this field.