Xuan Yujie, Shen Dongsheng, Long Yuyang, Shentu Jiali, Lu Li, Zhu Min
School of Environmental Science and Engineering, Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, Zhejiang Gongshang University, Hangzhou 310012, China.
School of Environmental Science and Engineering, Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling, Zhejiang Gongshang University, Hangzhou 310012, China; Key Laboratory of Environment Remediation and Ecological Health (Zhejiang University), Ministry of Education, China; Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, China.
J Hazard Mater. 2024 Nov 5;479:135717. doi: 10.1016/j.jhazmat.2024.135717. Epub 2024 Sep 3.
Chlorinated organophosphorus flame retardants (Cl-OPFRs) and microplastics (MPs) are emerging pollutants in landfills, but their synergistic behaviors and triggering risks were rarely focused on, impeding the resource utilization of landfill soils. This study systematically investigated the adsorption/desorption behaviors, bioaccessibility and human health risks of Cl-OPFRs in landfill soil particle-size fractions coexisted with MPs under simulated gastrointestinal conditions. The results showed that the adsorption capacity and bioaccessibility of Cl-OPFRs in humus soil were higher than that in subsoil. MPs promoted the adsorption of tris(1-chloro-2-methylethyl) phosphate (TCPP) and tris(1,3-dichloro-2-propyl) phosphate (TDCPP) in landfill soils by up to 34.6 % and 34.1 % respectively, but inhibited the adsorption of tris(2-chloroethyl) phosphate (TCEP) by up to 43.6 %. The bioaccessibility of Cl-OPFRs in landfill soils was positively correlated with MPs addition ratio but negatively correlated with the K of Cl-OPFRs, soil organic matter and particle size. MPs addition increased the residual concentration of Cl-OPFRs and significantly increased the bioaccessibility of TCEP and TDCPP by up to 33.1 % in landfill soils, resulting in higher carcinogenic and noncarcinogenic risks. The study presents the first series of the combined behavior and effects of MPs and Cl-OPFRs in landfill soils, and provides a theoretical reference for landfill risk management.
氯化有机磷阻燃剂（Cl-OPFRs）和微塑料（MPs）是垃圾填埋场中新兴的污染物，但它们的协同行为和引发的风险很少受到关注，这阻碍了垃圾填埋场土壤的资源利用。本研究系统地研究了在模拟胃肠道条件下，与微塑料共存的垃圾填埋场土壤粒径组分中Cl-OPFRs的吸附/解吸行为、生物可及性和人类健康风险。结果表明，腐殖土中Cl-OPFRs的吸附能力和生物可及性高于底土。微塑料分别促进了垃圾填埋场土壤中磷酸三（1-氯-2-甲基乙基）酯（TCPP）和磷酸三（1,3-二氯-2-丙基）酯（TDCPP）的吸附，增幅分别高达34.6%和34.1%，但抑制了磷酸三（2-氯乙基）酯（TCEP）的吸附，降幅高达43.6%。垃圾填埋场土壤中Cl-OPFRs的生物可及性与微塑料添加比例呈正相关，但与Cl-OPFRs的K值、土壤有机质和粒径呈负相关。添加微塑料增加了垃圾填埋场土壤中Cl-OPFRs的残留浓度，并显著提高了TCEP和TDCPP的生物可及性，增幅高达33.1%，导致更高的致癌和非致癌风险。该研究首次展示了微塑料和Cl-OPFRs在垃圾填埋场土壤中的联合行为和影响，为垃圾填埋场风险管理提供了理论参考。
