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Microplastics: environmental distribution and degradation by aerobic/anaerobic microorganisms
Summary
This review synthesises research on the environmental distribution of microplastics across water, soil, and atmospheric compartments and examines their degradation by aerobic and anaerobic microbial communities. The authors compare how different redox environments shape microbial community structure, metabolic pathways, and degradation efficiency, identifying key bacterial and fungal taxa capable of converting plastic polymers into environmentally benign carbon compounds.
微塑料(<5 mm)作为新型环境污染物, 广泛分布于水体、土壤及大气环境中, 对生态系统及人类健康构成严重威胁. 传统处理技术(如焚烧、填埋等)存在二次污染风险, 成本效益比低等缺点, 亟需开发绿色降解途径. 微生物具有分解高分子聚合物的代谢能力, 是微塑料降解的核心生物要素, 部分细菌和真菌已被证明能将其转化为环保的碳化合物. 在好氧与厌氧这两种典型氧化还原环境下的微生物群落结构、代谢途径及降解效率存在明显差异. 基于此, 本综述系统总结了微塑料的分布与来源, 及其物理化学性质对微生物的影响. 探讨了微生物在有氧与无氧条件下对微塑料的降解机制, 为开发高效生物降解技术, 制定微塑料污染控制策略提供重要的理论依据.