Pollution Characteristics and Health Risk Assessment of Phthalates in Melon Field Soil
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Abstract:
In order to assess the pollution characteristics of Phthalate esters (PAEs) in the melon fields of Xinjiang and their risks to human health, 33 surface soil samples were collected in the assessment area and detected by gas chromatography-mass spectrometry. The content and main components of the 11 PAEs compounds detected in the soil were analyzed, compared with the control and treatment standards for PAEs in the soil, and the five types of detection were tested by the model recommended by the US Environmental Protection Agency (US EPA), and PAEs with priority control were evaluated for human health risks. The test results showed that total of 11 PAEs compounds were detected in the melon field soil in the assessment area, the content ranging from 57.30 to 3272.70 μg/kg, with the average value of 253.10 μg/kg; bis-iso-butyl ester (DIBP), bis-ethyl ester (DEP) andbis-2-ethylhexyl ester (DEHP) are the main pollutants, accounting for more than 90% of the total content of PAEs compounds; DEP contents in 6 soil samples exceed the control standard (not exceeding the governance standard), the rate of exceeding the standard is 18%, the remaining samples does not exceed the control standard and the governance standard; priority control of the non-carcinogenic risk (HQ) value of the compound to the human body is less than 1.0. Both benzylbutyl ester (BBP) and DEHP carcinogenic risk (CR) values are less than 1.0×10-6, within the acceptable range. Based on the above analysed results, it can be concluded that the PAEs pollution phenomenon in the soil samples of the melon fields in the assessment area is relatively low compared with the PAEs content of soils in otherurban facilities. The soil PAEs content in this study is relatively low, and its pollution degree, carcinogenic risk and non-carcinogenic risks are within the acceptable range.
