The influences of vitamin B12 (VB12), a biocatalyst, on the reductive degradation of 8:2fluorotelomer alcohol (8:2FTOH) in anaerobic activated sludge were investigated. VB12 could change the dynamic characteristic of reductive degradation of 8:2FTOH by anaerobic activated sludge and enhance the final removal rates of 8:2FTOH, but there were the upper and the lower dosage limits for the VB12. The final removal rates of 8:2FTOH in anaerobic activated sludge could not be enhanced while the spiked dosage of VB12 was less than or equal to 1mg/L, but no further improvement was also observed when the VB12 concentration was increased to more than or equal to 5mg/L. The final defluorination rates of 8:2FTOH could be significantly inhenced with spiking all VB12 dosages in the present study. The influences of VB12 dosages on the removal rates and defluorination rates of 8:2FTOH in the anaerobic activated sludge were inconsistent. In addition, when the anaerobic activated sludge was amended with the higher concentrations of VB12, the accumulation of intermediate degradation products (i.e. polyfluorinated compounds) was generally inhibited and the lower total molar recoveries of 8:2FTOH were observed while the molar yields of final degradation products (i.e. perfluorocarboxylates), as well as the mineralization defluorination rates of 8:2FTOH, were enhanced.
章佳琦, 李飞, 于路伟, 杨志敏, 曹威, 苑宝玲. 维生素B12对厌氧污泥还原降解8:2FTOH的影响[J]. 中国环境科学, 2020, 40(11): 4753-4761.
ZHANG Jia-qi, LI Fei, YU Lu-wei, YANG Zhi-min, CAO Wei, YUAN Bao-ling. Influence of vitamin B12 on the reductive degradation of 8:2FTOH by anaerobic activated sludge. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(11): 4753-4761.
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