Tan Min, Dong Jihong, Qu Junfeng, Hao Ming
School of Public Policy and Management, China University of Mining and Technology, Xuzhou 221116, China.
School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China.
Toxics. 2023 Oct 30;11(11):888. doi: 10.3390/toxics11110888.
It is crucial for effectively controlling potentially toxic element (PTE) pollution to understand the pollution situation, ecological risks, health risks, and migration patterns of PTEs. However, currently, no research has been conducted on the migration patterns of soil PTEs from coal mining subsidence areas to waterlogged areas under different restoration modes. In this study, a total of 15 sediment samples and 60 soil samples were collected from landscaped wetlands, aquaculture wetland, fish-photovoltaic complementary wetland, photovoltaic wetland, and waterlogged areas with untreated coal mining subsidence. The PTE pollution status, ecological risks, health risks, migration patterns, and the important factors influencing the migration were analyzed. The results indicated that the comprehensive pollution level of PTEs in waterlogged areas with coal mining subsidence can be reduced by developing them into landscaped wetlands, aquaculture wetlands, fish-photovoltaic complementary wetlands, and photovoltaic wetlands. Additionally, the closer to the waterlogged area, the higher the Cu content in the subsidence area soil is, reaching its peak in the waterlogged area. The Cd was influenced positively by SOC and pH. The research results were of great significance for formulating reclamation plans for waterlogged areas and controlling PTE pollution.
了解潜在有毒元素（PTE）的污染状况、生态风险、健康风险和迁移模式对于有效控制PTE污染至关重要。然而，目前尚未有关于不同修复模式下采煤塌陷区土壤PTE向涝渍区迁移模式的研究。本研究从景观湿地、水产养殖湿地、鱼光互补湿地、光伏湿地以及未治理的采煤塌陷涝渍区共采集了15个沉积物样本和60个土壤样本。分析了PTE的污染状况、生态风险、健康风险、迁移模式以及影响迁移的重要因素。结果表明，将采煤塌陷涝渍区开发为景观湿地、水产养殖湿地、鱼光互补湿地和光伏湿地可以降低其PTE的综合污染水平。此外，塌陷区土壤中Cu含量离涝渍区越近越高，在涝渍区达到峰值。Cd受土壤有机碳（SOC）和pH的正向影响。研究结果对于制定涝渍区复垦计划和控制PTE污染具有重要意义。
