Influence of immobilization of bacterial cells and TiO2 on phenol degradation

Title
Influence of immobilization of bacterial cells and TiO2 on phenol degradation
Authors
박미리김동주최재우임대순
Keywords
Phenol degradation; Suspended cells; Immobilized cells; Immobilized TiO2
Issue Date
2013-03
Publisher
Water, air, and soil pollution
Citation
VOL 224, NO 3, 1473-1-1473-9
Abstract
We investigated the influence of immobilization of bacterial cells and photocatalytic material TiO2 on the degradation of phenol by conducting batch microcosm studies consisting of suspended, immobilized cells and immobilized TiO2 at various initial phenol concentrations (50-1000 mg l-1). Results showed that both suspended and immobilized cells were concentration-dependent, exhibiting the increasing degradation rate with the concentration up to 500 mg l-1 above which it declined. The degradation rate of 0.39-3.47 mg l-1 h-1 by suspended cells was comparable with those of the literature. Comparison of the degradation rates between suspended, immobilized cells and immobilized TiO2 revealed that immobilized cells achieved the highest degradation rate followed by immobilized TiO2 and suspended cells due to the toxicity of phenol at the high concentration of 1000 mg l-1. This indicates that immobilization of bacterial cells or photocatalytic materials can serve a better alternative to offer the higher degradation efficiency at high phenol concentrations.
URI
http://pubs.kist.re.kr/handle/201004/44495
ISSN
00496979
Appears in Collections:
KIST Publication > Article
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