摘要:
微塑料已成为新的全球性环境污染问题。作为强吸附剂,微塑料可以吸附共存的有机污染物,进而改变其环境行为和毒性;也可以通过解吸作用促进污染物在不同介质中的迁移。因而,微塑料与有机污染物的相互作用强度和机理是全面评估两者的环境风险和深度研究微塑料毒性机制的必要信息。目前微塑料研究处于快速发展的起始阶段,加之微塑料本身成分、粒径、表面风化情况的复杂性及共存有机污染物的多样性使两者的相互作用十分复杂,亟需理清微塑料吸附解吸作用的影响因素和相关机制。因而,本文详细综述了微塑料对有机污染物吸附解吸作用的研究进展,并着重从微塑料性质(成分、粒径和表面风化)、有机污染物性质和水环境介质性质方面探讨了吸附的影响因素和相互作用机制,希望为微塑料吸附有机污染物及吸附的后续影响研究提供借鉴与参考。
Abstract:
Microplastics have become a new global environmental pollution problem. As strong adsorbents, microplastics can adsorb coexisting organic pollutants, thereby changing their environmental behavior and toxicity. They also can enhance the migration of pollutants between different medium. Thus, the strength and mechanism of adsorption interactions between microplastics and organic contaminants are necessary information for the comprehensive assessment of their environmental risks and the study on toxicity mechanisms of microplastics. At present, the research on microplastics is at the initial stage of rapid development. In addition, the complexity of composition, particle size and surface weathered condition for micro-plastics and the diversity for coexisting organic pollutants make their adsorption interaction very complicated. It is urgent to clarify the influencing factors and relevant mechanisms of adsorption and desorption. Therefore, this paper reviewed the research progress of the adsorption and desorption between microplastics and organic pollutants in detail, and mainly discussed the influencing factors and mechanism of adsorption from the aspects of microplastic properties (type, particle size and surface weathering), organic pollutant properties and water environment media properties, so as to provide reference to the further research on the adsorption of microplastics and its effects.
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