工业废弃场地再开发的环境评估:Ⅱ健康风险评估

Environmental Site Assessment for Brownfield Redevelopment:Ⅱ. Health Risk Assessment

工业废弃场地往往受到严重的土壤地下水污染,再开发往往会给公众带来潜在健康风险。对河南某城市一工业废弃污染场地进行了健康风险评估。根据未来土地利用状况,分别对居住场景和建筑场景的健康风险进行了评估。在居住场景下,总石油烃会引起较高的非致癌风险,而苯会通过口腔摄入和呼吸摄入导致较高的致癌风险。假如长期饮用MW-1附近区域的地下水时,苯和总石油烃会给居民带来不可接受的非致癌风险,同时苯还会带来较高的致癌风险。在建筑场景下,由于较短的暴露周期,场地污染不会带来不可接受的风险。为保护未来居民的健康,应当在场地开发为住宅小区前进行污染区域的修复。

Due to soil and groundwater contamination in Brownfield, the redevelopment of contaminated Brownfield may often pose health risk to public. To effectively manage the Brownfield, health risk assessment was conducted for a Brown.field located in one of Cities in Henan province. According to the future land use plan and pattern, health risk was evaluated for residential and construction scenario. Under residential scenario, TPH can pose unacceptable non - cancer risk to human and the unacceptable cancer risk will be resulted from soil ingestion and inhalation by benzene. There will be unacceptable non - cancer risk from TPH and benzene if the onsite groundwater is to be used as tap water. Furthermore, unacceptable cancer risk will be posed to human from benzene by onsite groundwater consumption. Under construction scenario, there is no unacceptable risk to the construction workers due to the short - term exposure and ingestion. To protect the future resident health, site remediation should be conducted for the locations with unacceptable risk before site redevelopment.