[PAEs in composts of municipal sludge and rice straw].
Four composting treatments for municipal sludge and rice straw were carried out, which included turning composting, inoculation-turning composting, continuous aeration, and intermittent aeration. GC/MS determination of phthalic acid esters (PAEs) in different composted composts showed that the total contents of six PAE compounds (sigma PAEs) ranged from 0.980-17.832 mg.kg-1, decreasing in the order of turning composting (17.832 mg.kg-1) > inoculation-turning composting (13.927 mg.kg-1) > intermittent aeration (10.765 mg.kg-1) > continuous aeration (9.815 mg.kg-1). DnOP was dominated in the composts. The degradation rate of sigma PAEs after composting was 1.37-45.71% (mean 27.63%), and that of diethyl phthalate (DEP), di-n-butyl phthalate (DnBP) and butylbenzyl phthalate (BBP) was 95.76-98.68%, 79.56-99.46% and 87.42-98.42%, respectively. The concentration of di-n-octyl phthalate (DnOP) was increased in the composts. Aeration-composting, and continuous aeration composting in particular, was more efficient than other treatments to degrade PAEs in municipal sludge.
College of Resources and Environmental Science, South China Agricultural University, Guangzhou 510642, China. cai.quanying@sina.com
Quanying
Q
Cai
Cehui
C
Mo
Xizhen
X
Zhu
Qitang
Q
Wu
Boguang
B
Wang
Guirong
G
Li
D001673:Biodegradation, Environmental; D003993:Dibutyl Phthalate / Q000032:analysis; D005308:Fertilizers; D012275:Oryza / Q000737:chemistry*; D010795:Phthalic Acids / Q000032:analysis* / Q000378:metabolism; D012722:Sewage / Q000032:analysis*
D005308:Fertilizers; D010795:Phthalic Acids; D012722:Sewage; D003993:Dibutyl Phthalate; C010715:di-n-octyl phthalate; C027561:butylbenzyl phthalate