朱正意, 薛永, 宋科, 等. 酞酸酯在农田土壤中的迁移转化行为和毒性效应[J]. 生态与农村环境学报, 2024, 40(7): 854-864. DOI: 10.19741/j.issn.1673-4831.2023.0512
    引用本文: 朱正意, 薛永, 宋科, 等. 酞酸酯在农田土壤中的迁移转化行为和毒性效应[J]. 生态与农村环境学报, 2024, 40(7): 854-864. DOI: 10.19741/j.issn.1673-4831.2023.0512
    ZHU Zheng-yi, XUE Yong, SONG Ke, et al. Fate and Toxicity Effects of Phthalic Acid Easters in Farmland Soil[J]. Journal of Ecology and Rural Environment, 2024, 40(7): 854-864. DOI: 10.19741/j.issn.1673-4831.2023.0512
    Citation: ZHU Zheng-yi, XUE Yong, SONG Ke, et al. Fate and Toxicity Effects of Phthalic Acid Easters in Farmland Soil[J]. Journal of Ecology and Rural Environment, 2024, 40(7): 854-864. DOI: 10.19741/j.issn.1673-4831.2023.0512

    酞酸酯在农田土壤中的迁移转化行为和毒性效应

    Fate and Toxicity Effects of Phthalic Acid Easters in Farmland Soil

    • 摘要: 酞酸酯又称邻苯二甲酸酯(phthalic acid esters, PAEs), 是环境激素类有机污染物, 作为添加剂被广泛应用于各种塑料、橡胶和树脂制品中。随着生产和使用量的大幅增加, PAEs已成为我国农田土壤中残留最多且关注度最高的有机污染物, 对农业生态环境和人类健康构成潜在威胁。根据现有研究, 在系统梳理我国农田土壤中PAEs的主要来源与分布情况的基础上, 综述了PAEs在农田土壤中的吸附、生物降解、迁移和挥发等环境行为的研究进展, 并分别评述了PAEs对土壤生物(包括微生物、动物和农作物)和人体的毒性效应。农膜覆盖及其残留物是引起我国农田土壤PAEs污染的最主要原因。其中, 约58.5%的PAEs主要分布在农田土壤表层0~20 cm处, 并且具有显著的地域性差异。正辛醇-水分配系数对数值(lg Kow)大、脂溶性强的PAEs主要吸附在土壤表层, 而lg Kow小、水溶性高的PAEs具有极高的迁移潜力; 有机质是阻滞PAEs向下迁移的主要原因; 微生物降解是去除农田土壤中PAEs的主要途径, 受化合物结构和土壤特性的影响。高浓度PAEs的短期暴露会对土壤生物产生不同程度的生理生化毒性乃至遗传毒性影响, 最终可通过饮食摄入危害人体(特别是儿童)健康。目前有关农田土壤PAEs的研究仍局限于土壤污染分布和赋存特征的调查性研究, 今后可在真实土壤环境中PAEs迁移转化过程、联合毒性效应以及代谢产物的行为和毒性等方面加强研究, 以期为农田土壤环境中PAEs控制标准制定和生态风险评估提供理论依据。

       

      Abstract: Phthalates or phthalic acid esters (PAEs), a class of endocrine-disrupting chemicals, widely used as additives in the manufacture of various plastic, rubber, and resin. With the increasing usage and substantial production of these products, PAEs have become the most residual and concerned organic pollutants in Chinese agricultural soil, posing potential threats to agro-ecological environment and human health. According to current references, this study summarized the research progress on the sorption, biodegradation, migration and volatilization of PAEs in agricultural soil based on the systematic summary of the main source and distribution of PAEs in agricultural soil, and the toxic effects of PAEs on soil organisms (including microorganisms, animals and crops) and human body were also respectively reviewed. The agricultural film covering and its residues were disclosed as the main causes of PAEs pollution in Chinese agricultural soil. About 58.5% of PAEs were distributed in 0-20 cm depth of agricultural soil surface, and there were significant spatial variations among different regions. The PAEs with high octanol-water partition coefficient (lg Kow) and fat solubility were mostly adsorbed on the topsoil, while the PAEs with low lg Kow and high water solubility had high migration potential. Soil organic matter was the main factor to hamper the downward migration of PAEs. Microbial degradation was the main way to remove PAEs from agricultural soil, which was affected by the chemical structure and the characteristics of soil. Short-term exposure to high concentrations of PAEs would produce different degrees of physiological, biochemical and even genotoxic effects on soil organisms, and eventually endangered human (especially children) health through dietary intake. At present, the researches on PAEs in agricultural soil are still focused on the investigation of soil pollution distribution patterns and occurrence characteristics. Studies about the migration and transformation process and combined toxic effects of several PAEs in natural soil, as well as the environmental behavior and toxicity of their metabolites, is the research trends in the future, so as to provide theoretical basis for the formulation of control standards and ecological risk assessment of PAEs in agricultural soils.

       

    /

    返回文章
    返回