摘要
建立了污染场地风险评估模型,计算场地污染物苯、镍和苯并(a)芘的风险贡献率和模型参数敏感性比例,分析了场地人群平均体重(BW)、暴露年限(ED)、暴露频率(EF)、土壤摄入量(IRs)、空气摄入量(IRa)和场地土壤含水率(Pws)、土壤颗粒密度(ρs)、土壤容重(ρb)、土壤有机质含量(fom)的敏感性。模型评估结果表明:场地风险评估的参数敏感性与污染因子所涉及的暴露途径有较大关系,其中Pws、ρs、ρb和fom主要影响呼吸吸入途径,IRs主要影响经口摄入途径,IRa对风险计算结果影响很小,而BW、ED和EF在模型中对各个暴露途径都有影响。在风险计算模型中,当污染物为苯时,ρs和ρb极为敏感;当污染物为镍时,BW、ED和IRs表现为敏感;当污染物为苯并(a)芘时,BW、ED、IRs、EF、Pws、ρs、ρb和fom均有一定的敏感性,其中BW、ED和IRs表现最为敏感。
Taking a contaminated site as an example, a model is established for risk assessment. By calculating the risk contribution rate of benzene, nickel and benzo(a) pyrene and the sensitivity ratio of model parameters, analyze the sensitivity of site population body weight (BW), exposure duration(ED), exprosure frequency (EF), daily oral ingestion rate of soils (IRs), daily air inhalation rate (IRa) and site soil water content(Pws), density of soil particulates (ρs), soil bulk density (ρb), and organic matter content in soils (fom). The model evaluation results show that the parameter sensitivity of the site risk assessment has a great relationship with the exposure pathways involved in the pollution factors. Pws,ρs,ρb and fom mainly affect the respiratory inhalation pathway, and IRs mainly affect the oral intake pathway. IRa has a little effect on risk calculations, while BW, ED, and EF have an impact on each exposure pathway in the model. In the risk calculation model, when the pollutant is benzene,ρs and ρb are extremely sensitive;When the pollutant is nickel, BW, ED and IRs are sensitive;When the pollutant is benzo(a)pyrene, all of BW, ED, IRs, EF, Pws,ρs,ρb and fom have certain sensitivity, among which BW, ED and IRs are the most sensitive.
作者
李聪
高焕方
严欢
曹园城
刘超
杨美婵
LI Cong;GAO Huanfang;YAN Huan;CAO Yuancheng;LIU Chao;YANG Meichan(Chongqing Huiya Environmental Protection Engineering Co.,Ltd.,Chongqing 400051,China;College of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400054,china;Sichuan SEP Analytical Services Co.,Ltd.,Sichuan 610041,China;Chongqing Lifan Automobile Research Institute,Chongqing 400707,China)
出处
《环境影响评价》
2019年第3期83-87,共5页
Environmental Impact Assessment
基金
重庆市技术创新与应用示范项目(cstc2018jszx-cyzdX0019)
关键词
污染场地
风险评估
参数
敏感性
contaminated site
risk assessment
parameters
sensitivity
