Typical microplastics in field and facility agriculture dynamically affect available cadmium in different soil types through physicochemical dynamics of carbon, iron and microbes
文献类型： 外文期刊
作者： Zhao, Meng 1 ; Li, Congping 4 ; Zhang, Caigui 4 ; Han, Bao 5 ; Wang, Xuexia 1 ; Zhang, Jiajia 1 ; Wang, Jiachen 1 ; Cao, Bing 1 ; Zhao, Yujie 2 ; Chen, Yanhua 1 ; Zou, Guoyuan 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Plan Nutr Resources & Environm, Beijing 100097, Peoples R China
2.Minist Agr & Rural Affairs, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China
3.Beijing Engn Technol Res Ctr Slow Controlled Relea, Beijing 100097, Peoples R China
4.Qujing Soil Fertilizer Stn, Qujing 655000, Yunnan, Peoples R China
5.Fangshan Planting Technol Promot Stn Beijing, Beijing 102412, Peoples R China
关键词： Soil type; Soil environment; Cd effective state; LDHS-DGT
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 440 卷
页码：
收录情况： SCI
摘要： Combined pollution from microplastics (MPs) and other environmental pollutants has attracted considerable attention. Few studies have investigated the effects of polyurethane (PU) and polypropylene (PP) MPs on available Cadmium(Cd) in different soil types. Here, PU and PP additions affected available Cd and reduced its concentration in soil (P > 0.05). PU and PP reduced available Cd more strongly in clay soil than that in sandy soil. PU and PP improved the soil porous structure and voids and significantly increased the Zeta potential in clay soil (P < 0.05). Dissolved organic carbon and pH in clay soil were significantly negatively correlated with available Cd after PU and PP addition, and Fe(II) was significantly negatively correlated with available Cd in sandy soil. PU and PP addition promoted the C-C, CO32-, and C-H functional groups and FeO, FeOOH, and Fe3O4 formation and influenced the effective Cd through adsorption and precipitation. CdCO3 formation and clay mineral adsorption, and iron oxide formation, influenced the effective Cd in clay and sandy soils, respectively. PU and PP influenced the effective state of Cd by affecting bacterial communities related to carbon and iron cycles. This study is significant for assessing the environmental risks of MPs combined with heavy metals in different soils and their mechanisms.
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