生态环境学报 ›› 2022, Vol. 31 ›› Issue (11): 2263-2274.DOI: 10.16258/j.cnki.1674-5906.2022.11.018

• 综述 • 上一篇    

微塑料模拟老化及其对污染物吸附行为影响研究进展

姜晶1,2(), 阮呈杰1, 陈霄宇1,2, 吴仪1, 汪永创1   

  1. 1.苏州科技大学环境科学与工程学院,江苏 苏州 215009
    2.苏州科技大学城市生活污水资源化利用国家地方联合工程实验室,江苏 苏州 215009
  • 收稿日期:2022-09-09 出版日期:2022-11-18 发布日期:2022-12-22
  • 作者简介:姜晶(1986年生),男,讲师,博士,研究方向为重金属污染修复研究。E-mail: jiangjing@usts.edu.cn
  • 基金资助:
    国家自然科学基金青年项目(42007131);江苏省高等学校自然科学研究面上项目(20KJB610004);城市生活污水资源化利用国家地方联合工程实验室(苏州科技大学)开放课题(KF202102);江苏省研究生科研与创新实践计划项目(SJCX22_1552)

Research Progress on Simulated Aging of Microplastics and Its Effects on Pollutant Adsorption

JIANG Jing1,2(), RUAN Chengjie1, CHEN Xiaoyu1,2, WU Yi1, WANG Yongchuang1   

  1. 1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, P. R. China
    2. National and Local Joint Engineering Laboratory for The Utilization of Urban Domestic Sewage, Suzhou, 215009, P. R. China
  • Received:2022-09-09 Online:2022-11-18 Published:2022-12-22

摘要:

微塑料在环境中被广泛检出,进入环境中的微塑料普遍发生着缓慢而复杂的老化过程,影响其与环境中其他污染物的相互作用。该文从微塑料的老化方法、理化性质变化、污染物吸附能力及相互作用机制等几个方面进行了归纳总结。微塑料的老化方法主要涉及物理方法、化学方法、生物方法等。物理老化方法有人为作用、光催化老化、侵蚀作用等;化学老化方法主要包括酸、碱、氧化处理等;生物老化方法主要是动植物、微生物、降解酶等对微塑料的作用。不同方法具有各自的特点和适用性。各种老化处理对微塑料表面物理性质都有不同程度的影响。老化后的微塑料表面出现更多褶皱,比表面积增加,孔隙度、结晶度等都发生变化;大多老化方法对微塑料的化学性质无明显影响,但UV(紫外光)老化、自然风化等对微塑料的性质影响较大,表面含氧官能团增加,促进了其对污染物的吸附作用。老化微塑料能与环境中的重金属、有机污染物发生吸附作用,微塑料性质、老化方法、污染物性质和环境因素等都会影响微塑料的吸附行为。老化后微塑料吸附性能普遍增强,主要通过疏水作用、静电作用、络合作用、氢键、范德华力、π-π相互作用吸附其他污染物。针对目前微塑料老化及其与污染物的相互作用研究中存在的不足,提出了复合条件下微塑料老化及其对污染物的吸附、老化微塑料对重金属-有机共存污染物的吸附机制、生物体内微塑料老化及其对污染物的载体作用和生物毒害作用、微塑料老化过程中添加剂的释放及其与污染物的相互作用、老化微塑料与环境中溶解性有机质、矿物相互作用等可能的研究方向。

关键词: 微塑料, 老化, 理化性质, 吸附, 作用机制

Abstract:

Microplastics are widely detected in the environment, and microplastics entering the environment generally undergo slow and complex aging processes, affecting their interaction with other pollutants in the environment. In this paper, the aging methods, physical and chemical properties of aged microplastics, pollutant adsorption capacity and interaction mechanism were summarized. There are many aging methods for microplastics, mainly involving physical, chemical and biological methods, and different methods have their own characteristics and applicability. The microplastic surface would become rougher after aging, which results in the increase of the surface area. Meanwhile, ultraviolet and natural aging could increase the oxygen-containing functional groups on the surface and promote its adsorption to other pollutants by hydrophobic action, electrostatic action, complexation, hydrogen bond, van der Waals’ force, and π-π interaction. In view of the shortcomings of the aging of microplastics and their interaction with pollutants, some suggestions were proposed to provide support for microplastic aging and its environmental impacts research, such as microplastic aging under complex conditions and its influence on pollutants adsorption, adsorption mechanism of aged microplastic on heavy metal-organic composite pollution, aging of microplastics in living organisms and its biological toxicity, the release of plastics additives during the process of microplastics aging and its interaction with pollutants and that of aged microplastics with dissolved organic matter and minerals.

Key words: microplastic, aging, physicochemical properties, adsorption, interaction mechanism

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