首页|土壤和地下水中重金属污染物迁移模型:以某有色金属冶炼厂为例

土壤和地下水中重金属污染物迁移模型:以某有色金属冶炼厂为例

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冶炼厂表层土壤重金属污染严重。由于数据采集和计算量的限制，大多数数值模拟将土壤和地下水分开，这与实际情况不符。本文以某冶炼厂为研究对象，将土壤和地下水视为一个整体系统，建立了土壤-地下水反应性溶质迁移三维耦合数值模型，以定量表征重金属在土壤和地下水中的迁移规律。模型采用反应系数(λ)和滞留系数(R)来描述重金属的释放和吸附能力。模型结果与现场实际污染分布一致，表明土壤-地下水修复技术对严重污染土壤和局部污染地下水均有良好的修复效果。所构建的土壤-地下水反应性溶质迁移三维耦合模型很好地描述和预测研究地点重金属的分布和迁移扩散行为。
Contaminant transport modelling of heavy metal pollutants in soil and groundwater:An example at a non-ferrous smelter site
The topsoil of smelter sites is subjected to severe contamination by heavy metals(HMs).Existing numerical simulations typically treat soil and groundwater separately owing to data limitations and computational constraints,which does not reflect the actual situation.Herein,a three-dimensional coupled soil-groundwater reactive solute transport numerical model was developed using the Galerkin finite element method with the smelter as the research object.This model treats soil and groundwater as a whole system,providing a quantitative characterization of HMs migration patterns in soil and groundwater.The model used the reaction coefficient(λ)and retention coefficient(R)to describe the release and adsorption capacities of HMs.Results from the model were consistent with actual pollution distributions in the field,indicating the efficacy of the soil-groundwater remediation technology for severe soil and localized groundwater pollution.The constructed three-dimensional coupled soil-groundwater reactive solute transport model can describe and predict the distribution and transport diffusion behavior of HMs at the study site with good efficacy.The model was also used to simulate and predict the effects of remediation technologies during the treatment of smelting site contamination,providing guidance for optimizing the treatment plan.

non-ferrous smelting sitesheavy metal pollutiontransportation and transformation mechanismsdiffusion flux predictionremediation technology simulation

张海丽、赵鹏、高文艳、肖保华、杨雪枫、宋磊、冯翔、郭林、陆永平、李海峰、孙静

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State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China

College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 101408,China

School of Metallurgy and Environment,Central South University,Changsha 410083,China

Henan Academy of Geology,Zhengzhou 450001,China

China Railway Seventh Bureau Group Nanjing Engineering Co.,Ltd.,Nanjing 210000,China

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有色金属冶炼场 重金属污染 迁移和转化机制 扩散通量预测 修复技术模拟

国家重点研发计划Guizhou"Hundred"High-level Innovative Talent Project,China

2019YFC1803601GCC[2023]038

2024

10.1007/s11771-024-5639-y

中南大学学报(英文版)
中南大学

中南大学学报(英文版)

CSTPCDEI
影响因子：0.47
ISSN：2095-2899
年,卷(期)：2024.31(4)
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