Effects of silver nanoparticles on biological nitrogen removal processes

被引：20
作者：
Jeong, E. [2 ]
Chae, S. R. [1 ]
Kang, S. T. [3 ]
Shin, H. S. [2 ]
机构：
[1] Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia
[2] Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Taejon 305701, South Korea
[3] Kyung Hee Univ, Dept Civil Engn, Yongin, Gyeonggi Do, South Korea
来源：
WATER SCIENCE AND TECHNOLOGY | 2012年 / 65卷 / 07期
关键词：
activated sludge; denitrification; inhibitory effect; nitrification; silver nanoparticles; WASTE-WATER; NANOSILVER; BEHAVIOR; RELEASE; OXYGEN;
D O I：
10.2166/wst.2012.005
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The effects of silver (Ag) nanoparticles (NPs) on activated sludge in a biological nitrogen removal (BNR) process were investigated under aerobic and anoxic conditions. We show that nitrification was more vulnerable to Ag NPs exposure than denitrification at the same Ag NPs concentration. In continuous operation of the BNR process, a higher inhibitory effect on nitrification was attributed to a smaller size of Ag NPs. About 70-90% of the Ag NPs supplied were embedded in the sludge matrix but 10-30% of the Ag NPs remained in the supernatant. This indicates that significant amounts of Ag NPs could be discharged from wastewater treatment plants and potentially impact on aquatic ecosystems.
引用
收藏
页码：1298 / 1303
页数：6
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