(구)장항제련소 매입구역의 비소 오염도와 생물학적접근성을 반영한 위해성평가 및 정화수준 결정에 관한 연구

Abstract

Metal concentrations in the former Janghang smelter area were determined and human health risk of arsenic (As) withbioaccessibility was investigated. Site investigation of the area within 1.5 km from the Janghang smelter showed the Asconcentrations of 4.8~169.8 mg/kg (avg. 37.8 mg/kg). For 85 samples out of 126 samples, As concentrations were higherthan the Worrisome Level of the Korean Soil and Environment Conservation Act, and seven samples exceeded theCountermeasure Standard. Risk assessment for As incorporated with the bioaccessibility revealed that potential humanhealth risk of the carcinogenic (1.8~5.0 × 10?5) was above the acceptable risk range (10?5~10?6) while the risk of the noncarcinogenicwas not found. Remediation goals based on risk incorporated with bioaccessibility of As ranged from 10.8 to20.0 mg/kg. Such difference in the remediation goals resulted from various bioaccessibility of As (i.e., between8.7~66.3%) at the study site.