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| Distribution Characteristics of Phthalic Acid Esters in Soils and Vegetables in Vegetable Producing Areas of Shantou City, China |
| Received:April 27, 2015 |
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| KeyWord:phthalic acid esters(PAEs);soil;vegetable;pollution distribution;bioaccumulation |
| Author Name | Affiliation | E-mail | | WU Shan | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | | | LI Bin | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | | | LIANG Jin-ming | Zhongshan Agricultural Science and Technology Promotion Center, Zhongshan 528400, China | | | PENG Si-qing | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | | | ZHANG Tian-bin | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | | | TANG Chao | Shandong Energy Zibo Mining Group, Shaanxi Zhengtong Coal Co.Ltd, Xianyang 713699, China | | | LIANG Wen-li | Zhongshan Agricultural Science and Technology Promotion Center, Zhongshan 528400, China | | | YANG Guo-yi | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | gyyang@soil.cn |
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| Abstract: |
| Pathalic acid easters(PAEs) are widely-used plasticizers and have become primary risk pollutants. In this study, 63 topsoil and 26 agricultural product samples were collected from vegetable producing areas of Shantou City, Guangdong Province, China, to investigate and assess the pollution level and distribution characteristics of PAEs in soils and vegetables. The content of total PAEs(∑PAEs) in soils ranged from 0.018 to 9.303 mg·kg-1 and averaged 0.721 mg·kg-1, with the detection rate of 100%. Average ∑PAEs in soils of Shantou City decreased in order of Chaoyang >Longhu >Denghai >Chaonan >Jinping. The content of dimethyl phthalate(DMP), diethyl phthalate(DEP), di-n-butyl phthalate(DBP) and butyl benzyl phthalate(BBP) in soils exceeded the U.S. EPA control limits of PAEs in American soil by 38.1%, 6.3%, 6.3% and 3.2%, respectively. The content of ∑PAEs in vegetables ranged from 0.454 to 19.193 mg·kg-1, with an average of 7.158 mg·kg-1. The pollution potential of PAEs in vegetables in Shantou City was in order of Chaoyang >Denghai >Chaonan >Jinping >Longhu. The DBP concentrations in vegetables in Chaoyang and Chaonan districts were higher than the standards suggested by USA and Europe, thus posing high health risk. DBP was the highest percentage of PAEs in both agricultural soils and vegetables in Shantou City, thus a main component of PAE pollution. The ∑PAEs, DEHP and di-n-octyl phthalate(DnOP) in vegetables revealed significantly positive correlation with those in soils, with Pearson coefficients(r) being 0.7(P=0.016), 0.825(P=0.002) and 0.813(P=0.002), respectively. Although the accumulation of single PAE compound was different among various vegetables, the ∑PAEs bioconcentration factors were above 1 for all vegetables investigated. Therefore, the accumulation characteristic of PAEs in vegetables should be fully considered when assessing the quality of vegetable soils. |
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