中南大学学报（自然科学版）2025，Vol.56Issue(1)：44-54,11.DOI:10.11817/j.issn.1672-7207.2025.01.005
铅锌矿区冶炼地块土壤渗透性对重金属垂向分布的影响
Soil permeability on vertical distribution of heavy metals in lead/zinc smelting site
摘要
Abstract
Soil permeability on the vertical distribution of As,Cd and Pb and their infiltration and migration in a lead and zinc smelting site was studied.The results show that the soil permeability severely affects the vertical migration of As,Cd and Pb in site soils.As,Cd and Pb in the profiled soil of the smelting site are mainly concentrated in the depth range of 0-2 m,The average mass fractions of As and Pb in the depth of[0,0.5)m soil layer are 1.6 and 3.5 times of the GB36600-2018 screening values,respectively.The vertical migration of As and Pb occurs mainly in moderately permeable soils with infiltration coefficients of 1×10-4 cm/s to 1×10-2 cm/s.In contrast,Cd still migrates vertically in minimally permeable soils with permeability coefficients less than 1×10-5 cm/s.The migration capacity of heavy metals in soils is clearly correlated with their forms of deposition.The migration capacity of heavy metals in soils by infiltration is significantly correlated with their hosting patterns.The mass fraction of Cd in the exchangeable and carbonate-bound forms of the soil is 25.01%,while Pb and As are only 12.54%and 2.54%,respectively.This is consistent with the fact that the migration capacity of Cd is significantly greater than that of As and Pb in soils of the same permeability.Therefore,the improvement of soil impermeability barrier measures can effectively control the risk of infiltration and migration of heavy metals,especially Cd,in the lead and zinc smelting site soil.关键词
铅锌冶炼地块/土壤渗透性/重金属/下渗迁移Key words
lead and zinc smelting site/soil permeability/heavy metals/infiltration and migration分类
资源环境引用本文复制引用
梁学超,郭朝晖,黄驰岳,高梓伦,杨锦波..铅锌矿区冶炼地块土壤渗透性对重金属垂向分布的影响[J].中南大学学报（自然科学版）,2025,56(1):44-54,11.基金项目
国家重点研发计划项目(2018YFC1800400)(Project(2018YFC1800400)supported by the National Key R&D Program of China) （2018YFC1800400）
