摘要
在对上海某重金属污染场地进行调查的基础上，对该场地潜在健康风险进行了评估，结果表明：场地表层（0-20cm）和亚表层（20-80cm）土壤均受到了重金属的严重污染；场地活动和扬尘作用使得大气灰尘中具有较高浓度的重金属，其中Cu和V的浓度分别达到15455mg／kg和11385mg／kg；由于土壤V污染和场地碱性环境使得地下水中V污染严重，而地下水中Cd、Cr、Co、Cu和zn的浓度较低，未受到污染；Cd、Cr、Cu和Zn的健康风险水平较低，但是V通过口腔、呼吸摄人及饮用地下水等途径可导致较高的健康风险，同时通过呼吸摄入可以带来较高的Co暴露风险。为了保护场地工人健康和地下水环境，对具有较高风险的区域，必须实施有效的管理措施，如控制污染源和进行必要修复等。
Site investigation and health risk assessment are performed for a metal-contaminated site. Site investigation shows that there are high concentrations of Cd, Cr,Co, Cu, V and Zn in surface （20 cm） and subsurface （80 cm） soils. Furthermore,dust contamination of metals is derived from site activity and fugitive dust, and in particular, the maximum concentrations of Cu and V are 15455 mg/kg and 11 385 mg/kg respectively. Due to soil V contamination and site alkalescence condition, site groundwater is affected by V, whereas the concentrations of Cd, Cr, Co, Cu and Zn are low in site groundwater. Site health risk assessment indicates that there is no unacceptable risk for the exposure of Cd, Cr, Cu and Zn. However, unacceptable non-cancer risk might be posed from V exposure by soil ingestion,inhalation and groundwater drinking. In addition,there is unacceptable Co exposure risk by inhalation dust. To protect site workers＇ health and groundwater quality, sound management measures should be conducted, such as contamination source control and remediation.
出处
《安全与环境工程》
CAS
2010年第3期32-35,共4页
Safety and Environmental Engineering
关键词
重金属
污染
场地调查
健康风险评估
风险商
heavy metal
contamination
site investigation
health risk assessment
hazard quotient
