Effects of trace volatile organic compounds on methane oxidation

Brazilian Archives of Biology and Technology

Wilai Chiemchaisri²  Chettiyappan Visvanathan²  Shing Wu Jy¹ 

[1],Asian Institute of Technology School of Environment, Resources and Development Environmental Engineering Program,Thailand

关键词: Landfill cover soils;    methane;    methanotrophs;    methane oxidation;    volatile organic compounds (VOCs);   

DOI  :  10.1590/S1516-89132001000200005

来源: SciELO

【 摘 要 】

The effects of volatile organic compounds (VOCs) on methane oxidation in landfill cover soils were examined. The batch experiments were conducted using single and mixed VOCs, such as, dichloromethane (DCM), trichloroethylene (TCE), tetrachloroethylene (PCE), and benzene. The results from all combinations showed a decrease in methane oxidation rate with increase in VOC concentrations. Moreover, inhibition effects of TCE and DCM were found higher than benzene and PCE. The reduction of methane oxidation by benzene and PCE could be attributed to the toxicity effect, whereas TCE and DCM were found to exhibit the competitive-inhibition effect. When the soil was mixed with DCM, no methane oxidation was found. Damage to the cell’s internal membrane was found in a methanotrophic culture exposed to VOC gases which is the attachment site of a key enzyme needed for methane oxidation

【 授权许可】

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