School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai, 200090, China.
Bull Environ Contam Toxicol. 2022 Oct;109(4):600-608. doi: 10.1007/s00128-022-03469-8. Epub 2022 Feb 3.
The relationship between the migration process and speciation distribution of Cr is important for the risk assessment in the underground environment. In this work, soil columns were collected from the chromate production site, with a 40-year operation, in the groundwater depression cone area of North China plain. The relationship between chromium pollution features and the geochemical properties of soil was established, and the migration risk of Cr(VI) was assessed based on the Nemerow composite index and Hydrus-1D model. The maximum total Cr concentration in the chromium slag dumping site reached 907 mg/kg, and that in the chromate production workshop was more than 200 mg/kg across the depth. The migration of Cr might be accelerated in the soil with abundant Mn (236-1461 mg/kg) but scarce organic matters (< 0.45%). The Hydrus simulation indicated that Cr(VI) would reach a cumulative flux of 300-729 mg/cm after 50 years.
铬的迁移过程与物种分布的关系对地下环境中的风险评估很重要。本研究采集了华北平原地下水漏斗区铬酸盐生产场地 40 年运行过程中的柱状土样。建立了铬污染特征与土壤地球化学性质之间的关系，并基于 Nemerow 综合指数和 Hydrus-1D 模型评估了 Cr(VI)的迁移风险。铬渣堆放场的总铬最大浓度达到 907mg/kg，铬酸盐生产车间的总铬浓度在整个深度范围内超过 200mg/kg。土壤中丰富的锰（236-1461mg/kg）但缺乏有机物（<0.45%）可能会加速铬的迁移。Hydrus 模拟表明，Cr(VI)在 50 年内将达到 300-729mg/cm 的累积通量。
Zotero 插件