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Chinese Journal of Applied Ecology ›› 2003, Vol. ›› Issue (11): 2001-2005.

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Effect of municipal sludge and chemical fertilizers on phthalic acid esters (PAEs) contents in Ipomoea aquatica grown on paddy soils

CAI Quanying1, MO Cehui1, ZHU Xizhen1, WU Qitang1, WANG Boguang2, JIANG Chengai1, LI Haiqin1   

  1. 1. College of Resources and Environmental Science, South China Agricultural University, Guangzhou 510642, China;
    2. Guangzhou Environmental Monitoring Center, Guangzhou 510620, China
  • Received:2002-04-09 Revised:2002-07-09 Online:2003-11-15

Abstract: GC/MSdeterminations on six phthalic acid esters (PAEs) in Ipomoea aquatic grown on potted paddy soil fertilized with municipal sludge and chemical fertilizers showed that the total contents of PAEs (∑PAEs) in Ipomoea aquatic aboveground parts ranged from2.129mg·kg-1 to 7.111 mg·kg-1,decreasing in order of Guangzhou sludge + fertilizers (7.111 mg·kg-1)>Guangzhou sludge (4.767 mg·kg-1)>Foshan sludge (3.569 mg·kg-1)>Foshan sludge + fertilizers (3.305 mg·kg-1)>fertilizers (2.638 mg·kg-1)>control (2.129 mg·kg-1),indicating that compared with control,fertilization increased ∑PAEs in Ipomoea aquatica to a different extent. Only certain compounds of PAEs in different treatments of Ipomoea aquatica were dominant,e.g.,butylbenzyl phthalate(BBP) in control,chemical fertilizers,Foshan sludge,and Guangzhou sludge accounted for 40 % to 80% of ∑PAEs,di-n-butyl phthalate(DnBP) in Foshan sludge + chemical fertilizers accounted for 56%,while di-n-octyl phthalate(DnOP),di(2-ethylhexyl)phthalate(DEHP) and BBPin Guangzhou sludge + chemical fertilizers accounted for approximately 30%. ∑PAEs and the contents of its most compounds were higher in the plants of Ipomoea aquatica than in its roots to a different extent.

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