Effect of Granular Activated Carbon on the Enhancement of Cometabolic Biodegradation of Phenol and 4-Chlorophenol  

作　　者：李轶 饶婷 刘志刚 

机构地区：[1]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, College of Environmental Science and Engineering, Hohai University [2]State Key Laboratory of Pollution Control and Resources Reuse, Nanjing University

出　　处：《Tsinghua Science and Technology》2010年第5期580-585,共6页清华大学学报（自然科学版（英文版）

基　　金：Supported by the State Key Laboratory of Pollution Control andResources Reuse of Nanjing University (No PCRRF08015);the National Natural Science Foundation of China (No 50830304);the Fundamental Research Funds for the Central Universities (No 2009B16814)

摘　　要：Enhancement of the cometabolic biotransformation of 4-chlorophenol（4-cp） and phenol were studied using chemically and thermally granular activated carbons（GACs）.It was found that both chemically activated and thermally activated GAC effectively adsorb phenol and 4-cp.More than 80% adsorped substrates were later desorpted,showing a reversible sorption behaviour in the GAC.For each activated carbon type,4-cp was preferentially adsorbed over phenol and the desorption efficiencies of both phenol and 4-cp were found to increase linearly with the initial mass of adsorbate in the adsorbent.The biodegradation of 500 mg/L phenol by Pseudomonas putida took 24 h while the biodegradation of 4-cp took 32 h.Inhibitions during the cometabolic biodegradation of 4-cp and phenol were alleviated by the addition of the GACs.The system with chemically-activated coconut type GAC had better system stability over thermally-activated peat type GAC.The results show that GAC can be regenerated by the cells enhancement of the cometabolic biotransformation of 4-cp and phenol can be accomplished using chemically-activated coconut type GAC.Enhancement of the cometabolic biotransformation of 4-chlorophenol（4-cp） and phenol were studied using chemically and thermally granular activated carbons（GACs）.It was found that both chemically activated and thermally activated GAC effectively adsorb phenol and 4-cp.More than 80% adsorped substrates were later desorpted,showing a reversible sorption behaviour in the GAC.For each activated carbon type,4-cp was preferentially adsorbed over phenol and the desorption efficiencies of both phenol and 4-cp were found to increase linearly with the initial mass of adsorbate in the adsorbent.The biodegradation of 500 mg/L phenol by Pseudomonas putida took 24 h while the biodegradation of 4-cp took 32 h.Inhibitions during the cometabolic biodegradation of 4-cp and phenol were alleviated by the addition of the GACs.The system with chemically-activated coconut type GAC had better system stability over thermally-activated peat type GAC.The results show that GAC can be regenerated by the cells enhancement of the cometabolic biotransformation of 4-cp and phenol can be accomplished using chemically-activated coconut type GAC.

关 键 词：activated carbon activation method COMETABOLISM 4-CHLOROPHENOL reversible adsorption PHENOL 

分 类 号：X703[环境科学与工程—环境工程]