Dynamic Evaluation of Heavy Metal Pollution Risk in Production Parks Based on Migration and Diffusion Processes Simulation
Heavy metal contamination in the soil-groundwater system of industrialized chemical parks poses signif-icant environmental and health risks.Current risk evaluations rely primarily on monitoring data and lack dynamic assessments based on migration and diffusion processes.This study focuses on an active industrial park.Although heavy metal concentrations in the groundwater are generally low,lead(Pb)exceeds the Class Ⅲ water quality standard at some points,with an exceedance rate of 21.42％.The coefficients of variation for heavy metal concen-trations exceed 50％,indicating substantial impacts from geological conditions and industrial activities.TOUGH-REACT,incorporating reactive processes,was used to simulate the migration and diffusion of mercury(Hg),Pb,and arsenic(As)in the groundwater.This simulation was integrated with a human health risk assessment model to evaluate health risks dynamically.The numerical model effectively identifies the transport and attenuation of Hg,Pb,and As,with coefficients of determination of 0.93,0.99,and 0.83,respectively.The groundwater health risk e-valuation,combined with process simulation,indicates that from August 2020 to March 2021,the risk of contami-nation decreased due to reactive transport.The health risks from Pb and As continued to decline during the simula-tion period.The model predicts that by April 2025,the lifetime excess cancer risk from As via drinking water will fall below 1×10-6,effectively eliminating the potential risk.
heavy metalsprocess numerical simulationhealth dynamic risksproducing chemical parkgroundwater
万方数据
维普
