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- Title
Organobentonite for Sorption and Degradation of Phenol in the Presence of Heavy Metals.
- Authors
Ji-Young Yoo; Jaeyoung Choi; Taeyoon Lee; Jae-Woo Park
- Abstract
An experimental study was performed to determine the feasibility of using organobentonite 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.
- Subjects
BENTONITE; SOIL absorption &; adsorption; SOIL degradation; BIODEGRADATION; HEAVY metals; POLLUTANTS; SOIL chemistry
- Publication
Water, Air & Soil Pollution, 2004, Vol 154, Issue 1-4, p225
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1023/B:WATE.0000022970.21712.64