宁夏土壤中PAEs污染特征及健康风险评价

张小红; 王亚娟; 陶红; 张晓丽; 马迪

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中国环境科学 ›› 2020, Vol. 40 ›› Issue (9) : 3930-3941.

土壤污染与控制

宁夏土壤中PAEs污染特征及健康风险评价

张小红^1,2, 王亚娟³, 陶红^1,2, 张晓丽¹, 马迪¹

作者信息 +

Study on pollution characteristics and health risk assessment of phthalates in soil of Ningxia

ZHANG Xiao-hong^1,2, WANG Ya-juan³, TAO Hong^1,2, ZHNG Xiao-li¹, MA Di¹

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文章历史 +

摘要

采集宁夏全区6种不同土地利用类型共87个土壤样品，使用气相色谱-质谱联用检测方法（GC-MS）检测了土壤中16种邻苯二甲酸酯（PAEs）化合物的含量，分析了不同土地利用类型土壤中PAEs污染特征和组成特征.基于主成分分析法对不同土地利用类型土壤中PAEs的可能来源进行了探讨，采用普通克里金插值法对PAEs进行空间插值分析，利用健康风险模型评价了6种PAEs单体在覆膜耕地、园地、耕地土壤中的人群健康风险.结果表明：宁夏不同土地利用类型土壤中∑₁₆PAEs含量范围为84.3~8728μg/kg，平均值为1500μg/kg，空间上表现出南北高，中间低的分布特征；在不同土地利用类型土壤中，DEHP、DnBP、DIBP是研究区土壤中最主要的污染单体，对∑₁₆PAEs总含量的平均贡献率分别为58.3%、13.9%、11.8%；主成分分析表明DnBP、DEHP、DIBP、DEP、DpHP、DMP单体之间、DBEP、BMPP单体之间具有正相关性，表明这些单体之间具有可能相似的来源；人体健康风险评价表明，6种优先控制化合物对成人和儿童产生的非致癌风险值均<1，未超过美国环保署（EPA）推荐的非致癌风险水平，对于DEHP和BBP单体，成人和儿童通过非饮食途径的致癌风险未超过美国EPA推荐的致癌风险水平，而在饮食途径下成人和儿童的致癌风险值分别为7.91×10^-6和3.08×10^-6，超过EPA推荐的致癌风险水平，应引起重视.

Abstract

A total of 87 samples were collected from the 6different types of land in Ningxia, the concentration of 16 phthalate esters (PAEs) were detected by gas chromatography and mass spectrometer (GC-MS), and the pollution characteristic and component distribution were analyzed. Based on the principal component analysis method, the resource of PAE in different types of land was discussed. The spatial analysis of PAEs was carried out by the ordinary kriging interpolation method. Finally, the health risk model was used to evaluate the population health risks of 6PAEs monomers in the mulching land, garden and cultivated land. The results showed that the total concentrations of ∑₁₆PAEs were between 84.3 and 8728μg/kg, and the mean concentrations were 1500μg/kg in soil. The spatial distribution of PAEs was high in the south and north, and low in the middle. DEHP, DnBP and DIBP were the most abundant component in the soil of the study area, which accounted for average 58.25%, 13.9% and 11.8% of total PAEs. Principal component analysis showed a positive correlation between DnBP, DEHP, DIBP, DEP, DpHP and DMP, DBEP and BMPP, which indicated that these monomers may have similar sources. Human health risk assessment indicated that non-carcinogenic risk value of 6priority control phthalates for adults and children less than 1, and did not exceed the level of non-carcinogenic risk recommended by the us environmental protection agency (EPA). For DEHP and BBP monomer, the carcinogenic risk of adults and children through non-dietary approaches did not exceed the level of carcinogenic risk recommended by the EPA, while the carcinogenic risk values of adults and children through dietary approaches was 7.91×10^-6 and 3.08×10^-6, respectively, exceeding the carcinogenic risk level recommended by the EPA, which should be received more attention.

导出引用

张小红, 王亚娟, 陶红, 张晓丽, 马迪. 宁夏土壤中PAEs污染特征及健康风险评价[J]. 中国环境科学. 2020, 40(9): 3930-3941

ZHANG Xiao-hong, WANG Ya-juan, TAO Hong, ZHNG Xiao-li, MA Di. Study on pollution characteristics and health risk assessment of phthalates in soil of Ningxia[J]. China Environmental Science. 2020, 40(9): 3930-3941

中图分类号： X131.3

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