Phthalate pollution and migration in soil-air-vegetable systems in typical plastic agricultural greenhouses in northwestern China
| Autor: | Qingsong Ji, Zhikun Chen, Biao Huang, Xinkai Wang, Qiangqiang Lu, Yanxia Zhang, Ming Zhong, Ya'nan Fan, Xiaofei Liu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Pollution
China Environmental Engineering Soil test media_common.quotation_subject Phthalic Acids Greenhouse Seasonal variations Soil chemistry.chemical_compound Dry weight Phthalate migration Diethylhexyl Phthalate Plastic greenhouses Vegetables Soil Pollutants Environmental Chemistry Waste Management and Disposal media_common business.industry Significant difference Phthalate Impact factors Esters Dibutyl Phthalate chemistry Agriculture Environmental chemistry Air temperature Environmental science Soil-air-vegetable systems business Plastics |
| Zdroj: | Wang, X, Zhang, Y, Huang, B, Chen, Z, Zhong, M, Lu, Q, Fan, Y, Liu, X & Ji, Q 2022, ' Phthalate pollution and migration in soil-air-vegetable systems in typical plastic agricultural greenhouses in northwestern China ', Science of the total Environment, vol. 809, 151101 . https://doi.org/10.1016/j.scitotenv.2021.151101 |
| Popis: | Phthalate pollution in plastic greenhouses (PGs) has aroused concerns. However, mechanisms and factors of vegetables planted in PGs (VPGs) accumulating phthalates from soil and air are unclear. To fill the gap, 19 PGs in Shaanxi, the largest vegetable production province in northwestern China, were selected to probe this issue. 35 soil samples, 48 air samples, and 26 VPG samples were collected in winter and summer. Medians of sum of 7 phthalate concentrations (∑7 PAEs) in PG soil, air, and VPGs were 73.9 μg kg−1, 5300 ng m−3, and 1053 μg kg−1 dry weight, respectively. ∑7 PAE concentrations in PG environmental media in winter were higher than summer, with the significant difference in VPGs. Sum concentrations of bis (2-ethylhexyl) phthalate (DEHP) and di-n-butyl phthalate (DnBP) accounted for 76.8% and 82.3% of the ∑7 PAEs in soil and VPGs. DnBP and DEHP concentrations in VPGs were significantly correlated to those in air and soil, with correlation coefficients (R) of 0.89 and 0.96 to air and 0.68 and 0.59 to soil. Log-transformed soil-air partition coefficient (log KSA) and fugacity fraction (log ff) of DnBP decreased while log KSA and log ff of DEHP increased from winter to summer, though DnBP in soil volatilized to air while DEHP in air sank to soil within the year. These issues were caused by air temperature changes and the application of plastic films. Furthermore, DnBP concentrations in VPGs were positively correlated to KSA values of DnBP (R = 0.87) while those of DEHP were negative (R = −0.82). Therefore, VPGs could uptake more phthalates from air than from soil, especially for edible parts of leafy and solanaceous VPGs. Applying phthalates free agricultural films and precision management such as adjusting air temperature in PGs could be considered to ensure VPG safeties. |
| Databáze: | OpenAIRE |
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