Journal of Ecology and Rural Environment ›› 2023, Vol. 39 ›› Issue (11): 1504-1514.doi: 10.19741/j.issn.1673-4831.2023.0143

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

GU Wen, WANG Zhen, LIANG Meng-yuan, FAN De-ling, XING Wei-long, SUN Shuai, ZHANG Bing, WANG Lei, SHI Li-li   

  1. Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China
  • Received:2023-03-02 Online:2023-11-25 Published:2023-11-21

Abstract: This study aimed to evaluate the pollution characteristics and risks of phthalate esters (PAEs) in typical chemical 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 13 757 ng·L-1, 78.4 to 2 618 μg·kg-1, and 56.7 to 1 329 μg·kg-1, respectively. The average PAEs concentrations in water, sediment, and soil were 1 369 ng·L-1, 661 μg·kg-1, and 442 μg·kg-1, respectively. High concentrations of PAEs were detected in surface water and drinking water in Nantong and Taizhou, and in sewage treatment plant effluent in Taizhou. High concentrations of PAEs were also detected 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 presented a moderate to high degree of risk. High risk was presented by PAEs in sewage treatment plants. A health risk evaluation show that the PAEs health risk entropy in drinking water and water sources around chemical industrial parks in Jiangsu Province ranged from 0 to 0.191 2. 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 above moderate levels; therefore, pollution in these areas should receive high attention. Further analysis is required to identify 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.

Key words: phthalate ester, chemical industry park, pollution characteristic, risk assessment

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