[Degradation Processes of Biodegradable Plastics in Soil and Their Effects on Soil Animals].

Q2 Environmental Science
Li-Juan Zhang, Jie Chen, Rui-Xue Ao, Xiu-Lan Zhao
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引用次数: 0

Abstract

Biodegradable plastics are increasingly recognized as a viable alternative to conventional plastics, offering a potential solution to persistent plastic pollution. However, the efficiency of their biodegradation and the subsequent ecological impacts have garnered significant attention. These biodegradable plastics primarily consist of biodegradable polymers with minor quantities of additives such as plasticizers, dyes, photo-stabilizers, etc., to obtain greater performances and some specific physicochemical properties or functionalities. The degradation of biodegradable plastics in soil consists of three phases: biodeterioration, bio-depolymerization, and bioassimilation coupled with mineralization. These processes are decisively influenced by the properties of the biodegradable plastics, while they can face interference from the biotic and abiotic factors of the soils. During degradation, substantial quantities of microplastics, additives, oligomers, and monomers are released into the soils, which can easily be ingested by soil animals and consequently pose more serious negative effects on the behavior, growth, and reproduction of soil animals. Furthermore, biodegradable microplastics can act as carriers of soil pollutants such as heavy metals and organic pollutants, resulting in soil combined contaminations and inducing more serious detrimental effects on soil organisms. Finally, the prospects for further studies in this field are put forward.

可生物降解塑料在土壤中的降解过程及其对土壤动物的影响
可生物降解塑料越来越被认为是传统塑料的可行替代品,为持续的塑料污染提供了潜在的解决方案。然而,它们的生物降解效率及其对生态的影响引起了人们的广泛关注。这些可生物降解塑料主要由可生物降解的聚合物与少量的添加剂如增塑剂、染料、光稳定剂等组成,以获得更高的性能和一些特定的物理化学性质或功能。可生物降解塑料在土壤中的降解包括三个阶段:生物降解、生物解聚和生物同化与矿化耦合。这些过程受到可生物降解塑料特性的决定性影响,同时也会受到土壤生物和非生物因素的干扰。在降解过程中,大量的微塑料、添加剂、低聚物和单体被释放到土壤中,这些物质很容易被土壤动物摄入,从而对土壤动物的行为、生长和繁殖造成更严重的负面影响。此外,可生物降解的微塑料还可以作为重金属、有机污染物等土壤污染物的载体,造成土壤复合污染,对土壤生物产生更严重的有害影响。最后,对该领域的进一步研究提出了展望。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
环境科学
环境科学 Environmental Science-Environmental Science (all)
CiteScore
4.40
自引率
0.00%
发文量
15329
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