城市污泥和化肥对水稻土种植的通菜中邻苯二甲酸酯（PAEs）的影响

对水稻土施用城市污泥和化肥盆栽通菜，应用GC／MS联机检测技术对通菜中6种邻苯二甲酸酯化合物(PAEs)进行分析，探讨施肥对通菜中PAEs含量的影响，结果表明，各处理通菜中6种PAEs化合物的总含量(∑PAEs)在2．129～7.111mg·kg^-1之间，依次为广州污泥+化肥(7．111mg·kg^-1)>广州污泥(4．767mg·kg^-1)>佛山污泥(3；569mg·kg^-1)>佛山污泥+化肥(3．305mg·kg^-1)>化肥(2．638mg·kg^-1)>空白对照(2．129mg·kg^-1)。显示了施肥造成通菜中∑PAEs不同程度的提高，各处理通菜中的PAEs均以个别化合物为主，其中空白对照、化肥、佛山污泥和广州污泥处理的通菜中邻苯二甲酸丁基苄基酯(BBP)占∑PAEs的40％～81％。佛山污泥+化肥处理的通菜中邻苯二甲酸正二丁酯(DnBP)占∑PAEs的56％，而广州污泥+化肥处理的通菜中邻苯二甲酸丁基苄基酯(BBP)、邻苯二甲酸正二辛酯(DnOP)和邻苯二甲酸(2-乙基己基)酯(DEHP)各占∑PAEs的30％左右，通菜中∑PAEs和多数化合物的含量不同程度地大于其在根系中的含量。

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

GC/MS determinations 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 (sigma PAEs) in Ipomoea aquatic aboveground parts ranged from 2.129 mg.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 sigma 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 sigma 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 BBP in Guangzhou sludge + chemical fertilizers accounted for approximately 30%. sigma PAEs and the contents of its most compounds were higher in the plants of Ipomoea aquatica than in its roots to a different extent.