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大气沉积和洪水输入主导了中国南部的土积:一个多过程模型合输入和输出路径

Yutong Song¹, Meie Wang², Tian Xie²

¹State Key Laboratory of Regional and Urban Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.

Journal of hazardous materials

|January 7, 2026

概括

在中国南部 (Cd) 污染.

科学领域:

环境科学环境科学
土壤科学土壤科学
地质化学地质化学

背景情况:

在田土壤中 (Cd) 的污染是中国南部的重大食品安全问题.
地区Cd积累的主要驱动因素尚不清楚.
米种植特别容易受到Cd污染.

研究的目的:

在矿业影响的米种植地区量化时空Cd流.
为了确定主导的Cd输入和输出路径.
预测未来的Cd积累风险,并评估缓解策略.

主要方法:

开发基于质量平衡的高分辨率多过程模型.
动态合Cd输入路径 (大气沉积,灌,洪水淹没,农业输入) 和输出路径 (植物吸收,排水,水).
使用确定系数验证模型 (R2=0.71对于非洪平地,R2=0.65对于洪平地).

主要成果:

大气沉积 (2.97 mg·m−2·a−1) 和洪水诱导的输入 (13.01 mg·m−2·a−1) 是主要的Cd积累驱动因素.
Cd输出有限 (平均值:0.86 mg·m−2·a−1),导致高输入输出比率为7.6:1.
工业带和洪水平原存在持续或不断增加的Cd污染风险.

结论:

综合减缓策略,包括减排,沉积物管理和洪水控制,可以在40年内逆转Cd积累.
开发的建模框架可适应其他污染物和区域污染分析.
差异化的环境修复策略对于管理米土壤中Cd污染至关重要.

关键词:

是的组成部分.输入流是指输入的流量.质量平衡的质量平衡.多过程模型的多过程模型.输出流量是输出的流量.

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