6Humic acid-assisted biotransformation of tetrabromobisphenol-A by Shewanella species
Tetrabromobisphenol-A (TBBPA) was widely used in electronic equipments,plastics,textiles and many other applications duo to its good flame retardants.TBBPA has primarily been detecteded in air,soil,water,sewage sludge,or sediment,and showed high toxicity to aquatic animals and humans.It was demonstrated that TBBPA could reduced by anaerobic sludge,but little is known about its environmental fate and process mechanism.Here we investigated the effects of humic acid on biodegradation of TBBPA.The results showed that many kinds of humic acids could accelerate the anaerobic biodegradation of TBBPA.After 72 h,approximately 44% of TBBPA (initial concentration of 80 mg/L) was removed from the medium in cultures of Shewanella sp.with 90 mg L-1 humic acids extracted from activated sludge and 20 mM sodium lactate as electron donor.No evidence of TBBPA reduction were achieved without humic acids and better results were observed with higher humic acids concentration.It was also found that the humic acids could improve TBBPA solubility in water and have redox activities,which could act as electron shuttles for accelerating TBBPA biotransformation.
Zhenzhen Fu Jing Wang Guangfei Liu Hong Lv Ning Guo
Key Laboratory of Industrial Ecology and Environmental Engineering,State Key Laboratory of Fine Chemicals,School of Environmental Science and Technology,School of Chemical Engineering,Dalian University of Technology,116024,Dalian,Liaoning Province,P.R.of China
国内会议
大连
英文
211-211
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）