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一个区域质量平衡模型,用于在管理场景下空间预测在土中的临界负载

Jia Zhong¹, Linglan Kong¹, Richmond Anaman¹

¹Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China.

Journal of hazardous materials

|June 20, 2025

概括

这项研究模拟了区域土壤 (Cd) 变化和临界负载,发现清除草显著增加了临界负载,而应用则降低了临界负载,有助于防止污染.

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:

预测区域土壤 (Cd) 变化和临界负载对于预防污染至关重要.
工业城市附近的米土壤面临来自微量金属积累的风险.
了解Cd输入/输出路径是管理土壤污染的关键.

研究的目的:

开发一个区域化的土壤临界负载模型,用于估计微量金属含量和临界负载的时空变化.
评估不同管理场景对50年土壤Cd水平和临界负载的影响.
为输入流量极限提供参考资料,以支持区域土壤污染管理.

主要方法:

开发一个区域化的土壤临界负载模型.
在三种情景下对土壤中Cd含量的50年模拟:默认,石灰应用和吸管去除.
分析大气沉积,植物吸收和临界负荷的空间变化.

主要成果:

在默认情景中,土壤中的Cd含量保持稳定,随着石灰的应用而增加,随着吸管的去除而显著下降.
大气沉积和植物吸收被确定为主要的Cd输入和输出途径.
区域临界负载在空间上有所不同,受初始土壤Cd,pH和植物吸收因子 (PUF) 的影响.

结论:

清除草大大增加了土壤的临界负载,增强了对Cd污染的保护.
石灰应用减少了关键负载,需要仔细监测和管理.
开发的模型有效地可视化了Cd动态,评估了补救影响,并支持区域土壤污染管理战略.

关键词:

(Cd) 是一种关键负载的临界负载.质量平衡模型的质量平衡模型.这里是大米土壤.补救措施的补救措施.

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