江苏省典型化工园区7种邻苯二甲酸酯污染特征及风险评估

Pollution Characteristics and Risk Assessment of Seven Phthalate Esters in Typical Chemical Industry Parks in Jiangsu Province

为评价江苏省典型化工园区邻苯二甲酸酯(PAEs)污染特征及风险等级,于2022年12月对江苏常州、苏州、泰州和南通4市5个化工园区饮用水、地表水、污水处理厂进出水、土壤和沉积物进行采样,利用气相色谱-质谱仪测定各环境介质样品中PAEs浓度。结果表明,5个化工园区不同环境介质中主要检出PAEs为邻苯二甲酸二(2-乙基己基)酯(DEHP)、邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二异丁酯(DIBP)和邻苯二甲酸二辛酯(DNOP),水环境中总PAEs质量浓度范围为ND~13757 ng·L^(-1),平均质量浓度为1369 ng·L^(-1);沉积物中总PAEs范围为784~2618μg·kg^(-1),平均为661μg·kg^(-1);土壤中总PAEs范围为567~1329μg·kg^(-1),平均为442μg·kg^(-1)。南通、泰州地表水和饮用水以及泰州污水处理厂排口等点位PAEs检出浓度均较高,同时这些区域土壤和沉积物点位PAEs检出浓度也较高。基于风险熵值法的PAEs风险评估结果表明,5个化工园地表水、土壤和沉积物中PAEs呈现中、高程度风险;PAEs在污水处理厂中总体呈现高风险。健康风险评价结果表明,5个化工园区饮用水及周边水源地水体中PAEs健康风险熵(QRH)为0~01912,PAEs在南通饮用水中表现出中等健康风险,在其他地区表现为较低风险。总体来说,PAEs在南通、泰州的环境介质中污染程度最高,且具有中等以上环境风险,应引起足够重视,有必要进一步开展PAEs在这些区域的污染排放溯源,采取有效措施控制PAEs向环境过量排放。

This study aimed to evaluate the pollution characteristics and risks of phthalate esters(PAEs)in typical chem-ical industry parks in Jiangsu Province.Samples were collected of drinking water,surface water,raw water and effluent from sewage treatment plants,and soil and sediment from five chemical industry parks in Changzhou,Suzhou,Taizhou and Nantong in Jiangsu Province in December 2022.The concentrations of PAEs in the different samples were determined by gas chromatography-mass spectrometry.The main PAEs detected were bis(2-ethylhexyl)phthalate(DEHP),dibutyl phthalate(DBP),diisobutyl phthalate(DIBP),and di-n-octyl phthalate(DNOP).The total concentration ranges of PAEs in water,sediment,and soil were not from detected to 13757 ng·L^(-1),784 to 2618μg·kg^(-1),and 567 to 1329μg·kg^(-1),respectively.The average PAEs concentrations in water,sediment,and soil were 1369 ng·L^(-1),661μg·kg^(-1),and 442μg·kg^(-1),respectively.High concentrations of PAEs were detected in surface water and drinking wa-ter in Nantong and Taizhou,and in sewage treatment plant effluent in Taizhou.High concentrations of PAEs were also de-tected in soil and sediment in Nantong and Taizhou.The risk entropy method was used to assess the risk levels of the PAEs.The results show that PAEs in surface water,soil,and sediment in typical chemical parks in Jiangsu Province pres-ented a moderate to high degree of risk.High risk was presented by PAEs in sewage treatment plants.A health risk evalua-tion show that the PAEs health risk entropy in drinking water and water sources around chemical industrial parks in Jiangsu Province ranged from 0 to 01912.The PAEs in drinking water presented a moderate risk in Nantong and a low risk in other areas.Overall,samples from Nantong and Taizhou showed the highest levels of pollution and had risks that were a-bove moderate levels;therefore,pollution in these areas should receive high attention.Further analysis is required to iden-tify the sources of PAEs pollution in these areas so that effective measures can be taken to control excessive emission of such pollutants into the environment.