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微塑料和重金属在地质高背景土壤中的分布特征和综合生态风险评估建模

Fupeng Li¹, Yufeng Gong², Xiuyuan Yang³

¹Key Laboratory of Kast Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China.

The Science of the total environment

|June 7, 2024

概括

这项研究评估了土壤中的微塑料 (MP) 和重金属 (HM),发现了这两种材料的高度. 一个新的模型揭示了这些污染物带来的重大生态风险.

科学领域:

环境科学环境科学
土壤科学土壤科学
生态毒理学生态毒理学

背景情况:

微塑料 (MP) 和重金属 (HM) 是新兴的土壤污染物,具有重大生态影响.
高地质背景土壤在评估综合污染风险方面提出了独特的挑战.

研究的目的:

调查MP和HM在西高地质背景土壤中的同时存在和生态风险.
开发和应用一种新的二维综合指数模型来评估组合MPs-HM污染.
建立微塑料的风险评估模型和联合污染的标准.

主要方法:

量化重金属度 (Cd,Hg,As,Pb) 和微塑料的数量和类型 (PS,纤维).
使用调整后的生态风险指数 (ARI) 进行微塑料风险评估.
应用了一个二维组合指数 (TPI) 来评估组合MPs-HM污染的生态风险.

主要成果:

土壤中高Cd度 (平均0.38毫克·公斤-1).
与SWI-CR相比,大豆-小麦交叉作物-马-玉米旋转 (SWI-PCR) 土壤中的Hg,As和Pb增加.
微塑料的丰度很高 (平均8667.66个物品·公斤-1),主要是PS和纤维,ARI表示3级风险.
TPI显示,超过率为56%,平均值为445.07,将综合污染归类为高风险 (6级).

结论:

该研究强调了与高背景土壤中微塑料和重金属共同污染相关的重大生态风险.
开发的微塑料风险评估模型和TPI为评估复杂的多重污染物场景提供了有价值的框架.
调查结果强调需要综合污染管理战略,以减轻脆弱土壤生态系统的综合风险.

关键词:

综合污染污染综合污染生态风险评估评估生态风险评估农业系统农业系统重金属是一种重金属.微塑料是一种微塑料.

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