胡双庆. 上海郊区农田土壤微塑料和6种邻苯二甲酸酯污染特征及生态风险评估[J]. 生态与农村环境学报, 2024, 40(7): 975-984. DOI: 10.19741/j.issn.1673-4831.2024.0143
    引用本文: 胡双庆. 上海郊区农田土壤微塑料和6种邻苯二甲酸酯污染特征及生态风险评估[J]. 生态与农村环境学报, 2024, 40(7): 975-984. DOI: 10.19741/j.issn.1673-4831.2024.0143
    HU Shuang-qing. Pollution Characteristics and Ecological Risk Assessment of Microplastics and Six Phthalate Esters in Farmland of Shanghai Suburb[J]. Journal of Ecology and Rural Environment, 2024, 40(7): 975-984. DOI: 10.19741/j.issn.1673-4831.2024.0143
    Citation: HU Shuang-qing. Pollution Characteristics and Ecological Risk Assessment of Microplastics and Six Phthalate Esters in Farmland of Shanghai Suburb[J]. Journal of Ecology and Rural Environment, 2024, 40(7): 975-984. DOI: 10.19741/j.issn.1673-4831.2024.0143

    上海郊区农田土壤微塑料和6种邻苯二甲酸酯污染特征及生态风险评估

    Pollution Characteristics and Ecological Risk Assessment of Microplastics and Six Phthalate Esters in Farmland of Shanghai Suburb

    • 摘要: 农田土壤中微塑料和邻苯二甲酸酯污染近年来受到高度关注。邻苯二甲酸酯是典型塑料增塑剂, 农业生产过程中使用和废弃的各种塑料制品可能是农田土壤中微塑料和邻苯二甲酸酯的重要来源。本文研究了上海郊区大棚和稻田土壤中微塑料和6种邻苯二甲酸酯(PAEs)的污染特征, 并对PAEs开展了生态风险评估。结果表明, 大棚种植蔬菜土壤和稻田种植旱稻土壤微塑料含量分别为(1.47±0.54)×105和(2.06±1.10)×105个·kg-1; 大棚土壤微塑料中聚氯乙烯和聚对苯二甲酸乙二醇酯占比较高, 稻田土壤中聚乙烯占比较高。大棚土壤样品中球形、薄膜和纤维状微塑料平均占比分别为77.1%、21.3%和1.6%, 其中, 球形和薄膜塑料以聚氯乙烯、聚对苯二甲酸乙二醇酯和尼龙为主; 而稻田土壤中球形、薄膜和纤维状微塑料平均占比分别为45.5%、54.0%和0.5%, 其中, 球形和薄膜塑料以聚乙烯、尼龙和聚丙烯塑料为主。大棚土壤中PAEs含量为151.3~2 026.3 μg·kg-1, 稻田土壤PAEs含量为186.3~503.4 μg·kg-1。邻苯二甲酸双(2-乙基己基)酯和邻苯二甲酸二丁酯是土壤中含量最高的PAEs, 平均含量分别为402.5和128.2 μg·kg-1, 其含量比其他4种PAEs高1~2个数量级。上海郊区农田土壤中PAEs生态风险总体处于低至中等水平。研究结果表明, 大棚塑料薄膜和稻田农用地膜对土壤中微塑料和PAEs含量及组成有较大影响, 后续应开展农业生产过程中塑料残留的环境归趋研究, 为制定农田土壤中微塑料和PAEs污染防治策略提供支撑。

       

      Abstract: Microplastics (MPs) and phthalate esters (PAEs) pollution in farmland soil have received great attention in recent years. Used and discarded plastic products of agricultural production process is probably important source of MPs and PAEs, as a typical plasticizer, in environment. In this study, pollution characteristics of MPs and PAEs in agricultural soil from greenhouse and filed in Shanghai suburb were investigated. The ecological risk assessment of PAEs was also performed. The results show that abundance of MPs in greenhouse and field soil were (1.47±0.54)×105 and (2.06±1.10)×105 items·kg-1, respectively. The proportions of polyvinyl chloride and polyethylene terephthalate in greenhouse soil were relatively high, while in field soil polyethylene contributed the most. In greenhouse soil, the average proportions of pellet, film and fiber MPs were 77.1%, 21.3% and 1.6%, respectively, of which the pellets and films MPs mainly composed of polyvinyl chloride, polyethylene terephthalate and nylon. In the field soil, the average proportions of pellet, film and fiber MPs were 45.5%, 54.0% and 0.5% respectively, of which the pellet and film MPs mainly composed of polyethylene, nylon and polypropylene. The concentration of PAEs in greenhouse soil and field soil ranges from 151.3 to 2 026.3 μg·kg-1 and from 186.3 to 503.4 μg·kg-1, respectively. Bis (2-ethylhexyl) phthalate and dibutyl phthalate were dominant in soil samples, with an average concentration of 402.5 and 128.2 μg·kg-1, respectively, which were one to two orders of magnitude higher than the other four PAEs. Overall, the ecological risk of PAEs in farmland in the suburbs of Shanghai is at low to medium level. The results of this study indicate that greenhouse plastic film and agricultural plastic film have a significant impact on the content and composition of MPs and PAEs in soil. Subsequent research should be conducted on the environmental fate of plastic residues during agricultural production in order to develop pollution prevention and control strategies for MPs and PAEs in farmland soil.

       

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