Groundwater Risk Assessment Based on DRASTIC and Special Vulnerability of Solidified/Stabilized Heavy-Metal-Contaminated Sites
نویسندگان
چکیده
Solidification/stabilization technology is commonly used in the remediation of heavy-metal-contaminated sites, which reduces leaching capacity heavy metals, but total amount metals soil not reduced, there still a risk metal re-release and contamination groundwater, groundwater solidified/stabilized sites needs to be assessed. Through analysis system structure combined with integration method pollution sources—the vadose zone-aquifer, based on DRASTIC model special vulnerability solidification/stabilization site, assessment index including 4 influencing factors such as site hazard, pollutant aquifer vulnerability, natural conditions 18 evaluation indexes was constructed. Each graded assigned scoring value Analytic Hierarchy Process (AHP) calculate weights. The comprehensive weights contaminant stability, were 0.1894, 0.3508, 0.1090, respectively. isometric classify into five levels (very low [0, 2), [2, 4), medium [4, 6), high [6, 8), very [8, 10]), established. applied actual site. results showed that under scenario direct landfill remediated soil, for As Cd 4.55 4.58, respectively, both risk. When surrounding protective measures supplemented, 3.98 4.02, remained In scenarios, greater than because stability higher Cd. average percentage score reached 45.50%, weight inherent 35.08%, indicating original hydrogeological are fragile, vulnerable contamination, situ at order further reduce risk, topographic slope increased, thereby increasing surface drainage capacity, reduced 3.94 3.90, This study provides new assessing sites. It also has reference significance selecting parameters
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ژورنال
عنوان ژورنال: Sustainability
سال: 2023
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su15042997