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
Contaminant transport modelling of heavy metal pollutants in soil and groundwater:An example at a non-ferrous smelter site
张海丽 1赵鹏 1高文艳 2肖保华 3杨雪枫 1宋磊 1冯翔 4郭林 4陆永平 5李海峰 5孙静3
作者信息
- 1. 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
- 2. School of Metallurgy and Environment,Central South University,Changsha 410083,China
- 3. State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China
- 4. Henan Academy of Geology,Zhengzhou 450001,China
- 5. China Railway Seventh Bureau Group Nanjing Engineering Co.,Ltd.,Nanjing 210000,China
- 折叠
摘要
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.
Abstract
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.
关键词
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Key words
non-ferrous smelting sites/heavy metal pollution/transportation and transformation mechanisms/diffusion flux prediction/remediation technology simulation引用本文复制引用
基金项目
国家重点研发计划(2019YFC1803601)
Guizhou"Hundred"High-level Innovative Talent Project,China(GCC[2023]038)
出版年
2024
NETL
NSTL
万方数据