新型污染物邻苯二甲酸(2-乙基己基)酯在非正规生活垃圾填埋场原状土壤中赋存水平及环境风险评估  

The pollution level and environmental risk assessment of new pollutant DEHP(bis(2-ethylhexyl)phthalate)on undisturbed soil of informal landfill

作　　者：梁丽琛 张后虎 许元顺 王莉莉 王丹 涂海峰 蒋浩 严小飞 LIANG Lichen;ZHANG Houhu;XU Yuanshun;WANG Lili;WANG Dan;TU Haifeng;JIANG Hao;YAN Xiaofei(Nanjing Institute of Environmental Sciences,MEE,Nanjing,210042,China)

机构地区：[1]生态环境部南京环境科学研究所,南京210042

出　　处：《环境化学》2024年第10期3342-3354,共13页Environmental Chemistry

基　　金：中央级公益性科研院所基本科研业务专项(GYZX230411)资助.

摘　　要：邻苯二甲酸(2-乙基己基)酯(DEHP)是一种环境新型有机污染物,作为最常见的增塑剂被广泛应用于生产生活中.本研究选择某非正规生活垃圾填埋场不同土层的原状土壤作为研究对象,采集土壤样品共168份,分析其DEHP赋存水平,比对现有环境质量标准,初步判断其环境风险,并采用熵值法和USEPA模型评估DEHP产生的生态风险及人体健康风险.结果表明,送检样品中只有1份土壤样品超出GB36600-2018中第一类用地筛选值,67份样品超出美国土壤控制标准.使用熵值法模拟研究区原状土壤中,DEHP含量对敏感受体藻类、甲壳类及鱼类的生态风险,统计结果表明整体以中、高生态风险为主.通过USEPA模型计算得出,研究区送检土壤样品中DEHP的非致癌风险均可接受,致癌风险成人不可接受率高达10.7%,儿童高达17.1%,且上层土壤致癌风险普遍高于中下层.因此,非正规生活垃圾填埋场原状土层中DEHP环境风险明显需予以重视.DEHP(bis-(2-ethylhexyl)phthalate)is a commonly used plasticizer in daily life and manufacturing,and it is an increasing organic contaminant in the environment.The research object in this study was undisturbed soil from informal landfill sites at varying depths.To examine the amounts of DEHP occurrence,168 soil samples with varying landfill ages and layer depths were gathered.The dangers to human health and the environment posed by DEHP were evaluated using the USEPA model and the entropy technique.According to the results,67 of the submitted samples surpassed US soil control criteria,and one soil sample exceeded the first category land screening value in GB36600-2018.In the undisturbed soil layer of the research region,the ecological risk of DEHP was mostly medium to high when fish,crustaceans,and algae were chosen as sensitive receptors.Through the USEPA model calculation,the non-carcinogenic risk of DEHP was determined to be acceptable;the unacceptable risk of cancer in adults was as high as 10.7%,and in children,it was as high as 17.1%.Additionally,compared to the middle and bottom soil layers,the top soil layer often had a greater cancer risk.It is important to consider the environmental effects of DEHP on the undisturbed soil layer of informal landfill sites.

关 键 词：邻苯二甲酸 (2-乙基己基) 酯 非正规生活垃圾填埋场 熵值法 USEPA 模型. 

分 类 号：X-1[环境科学与工程] O6[理学—化学]