Journal of Ecology and Rural Environment ›› 2017, Vol. 33 ›› Issue (4): 308-316.doi: 10.11934/j.issn.1673-4831.2017.04.003

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Distribution Characteristics of Phthalic Acid Esters in Soil and Vegetables Under Greenhouse in Different Areas of Jiangsu Province, China

FENG Yan-hong1,2, ZHANG Ya1,2, ZHENG Li-ping1,2, YING Rong-rong1,2, LIN Yu-suo1,2, WANG Guo-qing1,2   

  1. 1. Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China;
    2. State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing 210042, China
  • Received:2016-09-27 Online:2017-04-25 Published:2017-04-01

Abstract:

Used widely as plasticizers in facilitated farming, phthalic acid esters (PAEs) have become primary risk pollutants. 50 top soil samples and 50 vegetable samples were collected from vegetable greenhouses in different areas of Jiangsu Province, for analysis of content of PAEs with GC-MS, to investigate and assess pollution level and distribution characterstics of PAEs in the soils and vegetables. PAEs were detected in all the soil samples (100%), ranging from 42.46-276.76 μg·kg-1 and averaging 116.7 μg·kg-1 in content of the total. DBP and DEHP were the dominant PAEs in the soils, accounting for 64.49% and 23.92% of the total; In terms of average PAEs in the soil, the four major vegetable producing areas of Jiangsu displayed a decreasing order of Suzhou > Huai'an >Yancheng > Suqian. DBP contents in the 24% of the soil samples exceeded the US EPA criteria for the six priority controlled PAEs. PAEs were detected in all the vegetable samples (100%), too, with the content of total PAEs varying in the range from 38.31-241.87 μg·kg-1 and averaging 104.25 μg·kg-1. DEHP and DnOP were the dominant pollutants in the vegetable samples, accounting for 25.34% and 24.59%; In terms of average PAEs in vegetable, the four areas followed a decreasing order of Suzhou > Yancheng > Huai'an > Suqian. However, the contents of PAEs in all the vegetable samples were lower than the recommended criteria for intake in the USA and Europe. In the soil-vegetable system, concentrations of PAEs, DBP and DEHP were found significantly related. And the vegetables studied varied sharply in capacity of enriching the six PAEs compounds, but their enrichment coefficients all approached 1. Therefore, in evaluating soil quality of facilitated vegetable fields, it is essential to pay adequate attention to effects of the properties of the vegetables per se on PAEs absorption and accumulation.

Key words: phthalic acid esters (PAEs), vegetable greenhouses, vegetable, pollution level, bioaccumulation

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