MIL-101高效吸附测定土壤气中三氯乙烯及健康风险评估  

Determination of Trichloroethylene in Soil Gas by MIL-101 Adsorption and Health Risk Assessment

作　　者：郭晓欣 张超艳[2] 张瑞环 姜林[3] 周友亚[2] 王淑萍[1] 白利平[2] GUO Xiaoxin;ZHANG Chaoyan;ZHANG Ruihuan;JIANG Lin;ZHOU Youya;WANG Shuping;BAI Liping(College of Chemistry ＆ Material Science,Hebei Normal University,Shijiazhuang 050024,China;State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing100012,China;Beijing Municipal Research Institute of Environmental Protection,Beijing 100037,China)

机构地区：[1]河北师范大学化学与材料科学学院,河北石家庄050024 [2]中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012 [3]北京市环境保护科学研究院,北京100037

出　　处：《环境科学研究》2018年第6期1129-1137,共9页Research of Environmental Sciences

基　　金：国家环境保护公益性行业科研专项(No.201509034);河北省自然科学基金项目(No.B2011205037);国家自然科学基金项目(No.21075114)~~

摘　　要：为研究基于实测土壤气中ρ(三氯乙烯)计算风险值与Johnson-Ettinger联合Dual-Equilibrium Desorption(JE-DED)模型和J&E模型计算风险值的差异,在MIL-101、UIO-66、ZIF-8和MOF-801金属-有机骨架(MOFs)材料,球形活性炭、膨胀石墨碳吸附材料及Hi Siv1000和Hi Siv3000分子筛等3类8种吸附剂中筛选出吸附效率较高的MIL-101 MOF材料用以吸附并测定土壤气中ρ(三氯乙烯),并将基于实测土壤气中ρ(三氯乙烯)计算的风险值与J&E模型和JE-DED模型计算的风险值进行比较.结果表明:(1)对于北京潮土和黑龙江黑土,J&E模型计算的风险值比基于实测土壤气中ρ(三氯乙烯)计算的风险值高2个数量级.(2)对于w(有机碳)较低的北京潮土,基于JE-DED模型计算的风险值比基于实测土壤气中ρ(三氯乙烯)计算的风险值高1个数量级,但比基于J&E模型计算的风险值低1个数量级,表明JE-DED模型预测结果更接近实际情况,但仍偏保守.(3)w(有机碳)较高的黑龙江黑土,JE-DED模型计算的风险值与基于实测土壤气中ρ(三氯乙烯)计算的风险值更接近,JE-DED模型可以比较准确地预测三氯乙烯的风险值.研究显示,采用土壤气中ρ(三氯乙烯)实测值和JE-DED模型进行风险评价在一定程度上可以避免J&E计算过于保守的问题,可以更加真实客观地反映场地污染程度而避免过度修复产生资源浪费.To study the differences in calculated risk values based on measured concentrations of trichlorethylene in the soil gas versus the Johnson-Ettinger Dual-Equilibrium Desorption（JE-DED） model and the JE model. Through studying the effects of 8 adsorbents belonging to 3 categories（MOFs,Carbon materials,and molecular sieve） on the adsorption of trichloroethylene,MIL-101 was selected from UIO-66,ZIF-8,MOF-801,spherical activated carbon,graphic electrode,Hi Siv1000 and Hi Siv3000 to adsorb and determine the content of trichloroethylene in soil gas. Results of risk assessment based on trichloroethylene concentration measured in soil gas were compared with the results based on the calculation of JE and JE-DED models. The results showed that for the fluvo-aquic soil from Beijing and Heilongjiang black soil,the risk value calculated by JE was two orders of magnitude higher than the risk value calculatedbased on the measured vapor concentration of trichlorethylene in the soil gas. For the fluvo-aquic soil from Beijing with lower organic matter content,the calculated risk value of trichlorethylene in soil gas was one order of magnitude lower than that calculated by JE-DED model.However,for the Heilongjiang black soil with high organic matter content,the calculated risk value of JE-DED model was closer to the risk value calculated based on the measured concentration of trichlorethylene in the soil gas. Therefore,it was concluded that the risks based on the VOCs concentrations in soil gas and that based on the calculation of JE-DED model can avoid the problem of overly conservative in JE model,and objectively reflect the pollution states of the site and avoid over-remediation,as well as the waste of resources.

关 键 词：MIL-101 三氯乙烯 土壤气 J&E模型 JE-DED模型 风险评估 

分 类 号：X53[环境科学与工程—环境工程]