Biodegradation of four phthalate esters in sludge

被引：117

作者：

Chang, B. V. ^{[1
]}

Wang, T. H. ^{[1
]}

Yuan, S. Y. ^{[1
]}

机构：

[1] Soochow Univ, Dept Microbiol, Taipei 11102, Taiwan

来源：

CHEMOSPHERE | 2007年 / 69卷 / 07期

关键词：

biodegradation; phthalic acid esters; sludge; ultrasonic pretreatment;

D O I：

10.1016/j.chemosphere.2007.04.011

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This Study investigated the effects of ultrasonic pretreatment and various treatments on the aerobic degradation of four phthalic acid esters (PAEs) such as diethyl phthalate (DEP), benzyl butyl phthalate (BBP), di-n-butyl phthalate (DBP) and di-(2-ethyl hexyl)phthalate (DEHP) in sludge. The effect on PAE degradation of treating sludge with a 20 min sonication period at a power level of 0.1 W ml(-1) was evaluated. The degradation rates of the four PAEs were DBP > BBP > DEP > DEHP. Degradation rate constants (k(1)) and half-lives (t(1/2)) for the four PAEs (50 mg kg(-1)) ranged from 0.182 to 0.379 days and 1.8 to 3.8 days, respectively. The optimal ph for PAE degradation in sludge was 7.0 at 30 degrees C. PAE degradation was enhanced by the addition of yeast extract, brij 30 or brij 35 and inhibited by the addition of hydrogen peroxide. Our results show that a combination of ultrasonic pretreatment and biodegradation can effectively remove PAE from sludge. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1116 / 1123

页数：8

共 28 条

[1] Toxicity of di-(2-ethylhexyl) phthalate on the anaerobic digestion of wastewater sludge [J].