Soil structures and immobilization of typical contaminants in soils in response to diverse microplastics
文献类型： 外文期刊
作者： Chen, Liying 1 ; Han, Lanfang 1 ; Feng, Yanfang 3 ; He, Jiehong 1 ; Xing, Baoshan 4 ;
作者机构： 1.Guangdong Univ Technol, Sch Ecol Environm & Resources, Guangdong Prov Key Lab Water Qual Improvement & Ec, Guangzhou 510006, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou 511458, Peoples R China
3.Inst Agr Resources & Environm, Jiangsu Acad Agr Sci, Key Lab Agroenvironm Downstream Yangtze Plain, Minist Agr & Rural Affairs, Nanjing 210014, Peoples R China
4.Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA
关键词： Microplastics; Dissolved organic carbon; Soil aggregation; Phenanthrene; Lead
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：14.224； 五年影响因子：12.984 ）
ISSN： 0304-3894
年卷期： 2022 年 438 卷
页码：
收录情况： SCI
摘要： Microplastics (MPs) accumulation in soil ecosystems has become a worldwide issue. The influence of MPs on soil structures and contaminant transport has not been clearly unraveled. This study conducted soil column experiments covering four different treatments: soil without MPs (CK), soil with 0.5 wt% polyethylene (S+PE), soil with 0.5 wt% polyacrylonitrile (S+PAN), and soil with 0.5 wt% polyethylene terephthalate (S+PET). The interconnections between changes in soil structures and shifts in sorption efficiency for typical hydrophobic organic contaminants (e.g., phenanthrene (PHE)) and heavy metal (e.g., lead (Pb (II)) by soils induced by MPs were explored. MPs-added soils contained fewer macro-aggregates and lower aggregate stability compared to CK. Three MPs, particularly PE, promoted PHE sorption by soils but reduced Pb (II) sorption, which occurred in soils with or without dissolved organic carbon. The comparison between experimental and predicted sorption capacity, as well as the one-point sorption data of different aggregate sizes, showed that such variations in PHE and Pb (II) sorption were related to the shifts in soil aggregates besides from the physical mixture of soils with MPs.
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