Organobentonite for Sorption and Degradation of Phenol in the Presence of Heavy Metals

被引:6
|
作者
Ji-Young Yoo
Jaeyoung Choi
Taeyoon Lee
Jae-Woo Park
机构
[1] Guem River Basin Environmental Office,Monitoring and Analysis Division
[2] Rutgers University,Department of Environmental and Earth Science
[3] Korea Institute of Construction Technology Goyang,Construction Environment Research Department
[4] Hanyang University,Department of Civil Engineering
来源
Water, Air, and Soil Pollution | 2004年 / 154卷
关键词
biodegradation; cadmium; HSAB; lead; organobentonite; phenol; quaternary ammonium cations; sorption;
D O I
暂无
中图分类号
学科分类号
摘要
An experimental study was performed to determine the feasibility of usingorganobentonite modified with quarternary ammonium cations (QACs) as a reactive medium in immobilization and biodegradation barriers for mixed contaminants in the subsurface soil. Various factors, including interactions between heavy metals, organic contaminants, and soil microorganisms, were investigated when they coexisted with untreated bentonite and organobentonite. Batch sorption tests for cadmium and lead were conducted to quantify sorption selectivity of these metals on untreated bentonite and organobentonite. Metal concentrations of 50 × 10-6 M slightly reduced the growth of soil microbes and partially interfered with the biodegradation of phenol. Soil microorganisms tested with untreated bentonite grew after approximately 25 hr of lag period and degraded phenol completely within 350 hr. The results from this study demonstrate that organobentonite could be used as a reactive medium for immobilization and biodegradation of organic contaminants in the presence of heavy metals in the subsurface soil.
引用
收藏
页码:225 / 237
页数:12
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