土壤环境中内分泌干扰物的行为、归趋与生态效应研究进展

Research progress on the behavior, fate and ecological effects of endocrine-disrupting chemicals in soil environment

  • 摘要: 内分泌干扰物(EDCs)是一类具有激素干扰活性的环境污染物,其土壤环境行为与生态风险已成为我国新污染物治理的重点方向。本文基于近10年来国内外研究成果,对EDCs生物干扰机制、土壤赋存特征、环境行为调控因子及生态效应进行系统综述。结果表明:EDCs因与内源性激素结构相似,可通过受体介导、酶活调控及表观遗传修饰等途径干扰机体生理功能;其土壤赋存具有显著的土地利用依赖性,农业区受农膜和农残影响呈区域浓度差异、工业区以高浓度多污染物累积为特征,城市土壤则呈低剂量复合型污染;有机质、pH、微生物、氧化还原电位等关键环境因子通过疏水分配、氢键络合、静电作用及生物代谢等途径协同调控其吸附解吸、迁移转化与生物有效性;EDCs可通过氧化损伤、微生物群落重构等路径干扰土壤生态系统结构与功能。本文旨在为土壤EDCs的污染防控和生态风险评估提供理论依据。

     

    Abstract: Endocrine-disrupting chemicals (EDCs) are a class of environmental pollutants with endocrine-disrupting activity, whose soil environmental behaviors and ecological risks have become a key priority in China's governance of emerging contaminants. Based on national and international research findings over the past decade, this paper systematically reviews the biological disruption mechanisms, soil occurrence characteristics, factors governing environmental behaviors, and ecological effects of EDCs. The results demonstrate that owing to their structural similarity with endogenous hormones, EDCs interfere with physiological functions via receptor-mediated pathways, enzyme-activity regulation, and epigenetic modifications. The occurrence of EDCs in soil exhibits significant dependence on land-use types, with agricultural lands showing regional concentration variations driven by agricultural plastic films and pesticide residues, industrial sites exhibiting high-concentration multi-pollutant accumulation, and urban soils presenting low-dose complex pollution. Key environmental factors, such as organic matter, pH, microorganisms, and redox potential, synergistically regulate the adsorption-desorption, migration and transformation, and bioavailability of EDCs through hydrophobic partitioning, hydrogen bonding complexation, electrostatic interactions, and biological metabolism. EDCs disrupt the structure and functions of soil ecosystems via pathways such as oxidative damage and microbial community restructuring. This study aims to provide a theoretical basis for pollution prevention and control of EDCs in soil and their ecological risk assessment.

     

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