聚苯乙烯微塑料对苯胺污染物的吸附行为
Adsorption behavior of aniline pollutant on polystyrene microplastics.
作者信息
Chen Zhenyu, Yang Jinchan, Huang Duanyi, Wang Shuni, Jiang Kai, Sun Weimin, Chen Zhihua, Cao Zhiguo, Ren Youhua, Wang Qi, Liu Huaqing, Zhang Xin, Sun Xiaoxu
机构信息
School of Environment, Key Laboratory of Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, 453007, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Garo-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Garo-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; College of Environmental Science and Engineering, Hunan University, Changsha, 410082, China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, China.
出版信息
Chemosphere. 2023 May;323:138187. doi: 10.1016/j.chemosphere.2023.138187. Epub 2023 Feb 18.
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.
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数量也持续飙升。塑料颗粒的疏水表面能够吸附各种化学污染物，因此可能通过食物链促进毒素积累。在本研究中，对工业生产中一种优先环境污染物苯胺在聚苯乙烯微塑料（mPS）表面的吸附行为进行了研究。结果表明，mPS的最大吸附容量为0.060 mg/g。24小时后达到吸附平衡，采用准二级模型解释苯胺在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值、离子强度和环境温度在吸附过程中起着重要作用。
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