MIL-101高效吸附测定土壤气中三氯乙烯并用于健康风险评估的研究

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MIL-101高效吸附测定土壤气中三氯乙烯并用于健康风险评估的研究
郭晓欣¹, 张超艳², 张瑞环^3,3, 姜林^3,3, 周友亚², 王淑萍¹, 颜增光², 白利平²
1.河北师范大学化学与材料科学学院;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;3.北京市环境保护科学研究院

摘要:

研究了MIL-101、ZIF-8、UIO-66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HiSiv1000和HiSiv3000分子筛等3类8种吸附剂对三氯乙烯的吸附效果,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三氯乙烯. 并将基于实测土壤气中三氯乙烯浓度计算的风险值与J E模型和Johnson-Ettinger联合Dual-Equilibrium Desorption (JE-DED)模型计算的风险值进行比较,结果表明,在居住情景室外呼吸暴露途径及低浓度条件下,潮土和黑土中基于实测土壤气中三氯乙烯浓度计算的风险值与JE-DED模型计算的风险值更为接近,均低于J E模型计算的风险值1-2个数量级. 采用实测土壤气VOCs浓度和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.

关键词: MIL-101 三氯乙烯土壤气风险评估

DOI：

分类号:X53

基金项目:环保部公益项目(201509034)；河北省自然科学(No. B2011205037) ；国家自然科学(NO.21075114)

Determination of trichloroethylene in soil gas by MIL-101 adsorption and its application in health risk assessment

GUO Xiaoxin¹, ZHANG Chaoyan², ZHANG Ruihuan³, JIANG lin³, ZHOU Youya², WANG Shuping¹, YAN Zengguang², BAI Liping²

1.College of Chemistry ＆ Material Science,Hebei Normal University;2.Chinese Research Academy of Environmental Sciences;3.Beijing Municipal Research Insititute of Environmental Protection

Abstract:

After studied 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 ZIF-8, UIO-66, UIO-66, MOF-801, spherical activated carbon, graphic electrode, HiSiv1000 and HiSiv3000 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 J E model and Johnson-Ettinger Dual-Equilibrium Desorption (JE-DED) model. It was showed that under the condition of low concentration exposure of outdoor inhalation pathways in a residential scenario, the risk of trichloroethylene based on measurement in soil gas in fluvo-aquic soil and black soil was comparable that based on the calculation with JE-DED model, but 1-2 orders lower than that based on the calculation with J Emodel. 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 J Emodel, and objectively reflect the pollution states of the site and avoid over-remediation, as well as the waste of resources.

Key words: MIL-101 trichloroethylene soil gas risk assessment