Enlarging effects of microplastics on adsorption, desorption and bioaccessibility of chlorinated organophosphorus flame retardants in landfill soil particle-size fractions

被引:0
作者
Xuan, Yujie [1 ]
Shen, Dongsheng [1 ]
Long, Yuyang [1 ]
Shentu, Jiali [1 ]
Lu, Li [1 ]
Zhu, Min [1 ,2 ,3 ]
机构
[1] Zhejiang Gongshang Univ, Zhejiang Engn Res Ctr Nonferrous Met Waste Recycli, Sch Environm Sci & Engn, Zhejiang Prov Key Lab Solid Waste Treatment & Recy, Hangzhou 310012, Peoples R China
[2] Zhejiang Univ, Minist Educ, Key Lab Environm Remediat & Ecol Hlth, Hangzhou, Peoples R China
[3] Key Lab Pollut Exposure & Hlth Intervent Zhejiang, Hangzhou, Peoples R China
基金
中国国家自然科学基金;
关键词
Landfill; Cl-OPFRs; Microplastics; Bioaccessibility; Health risk assessment; TROPHIC TRANSFER; SORPTION; ESTERS; BEHAVIOR;
D O I
10.1016/j.jhazmat.2024.135717
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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 ClOPFRs in humus soil were higher than that in subsoil. MPs promoted the adsorption of tris(1-chloro-2methylethyl) 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 OW 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.
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页数:13
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