钴掺杂铁酸铋活化过硫酸盐降解水中四溴双酚A的研究

采用溶胶凝胶法制备了钴掺杂的铁酸铋(xCo-BFO),以此作为多相催化剂,活化过硫酸盐(PMS),产生硫酸根自由基,在水相降解溴代阻燃剂四溴双酚A(TBBPA).研究了钴掺杂量、催化剂用量、PMS初始浓度对降解反应过程的影响.结果表明,在xCo-BFO中Co掺杂量(Co/Fe摩尔比)为0.1,用量为0.5 g.L-1,PMS浓度为2.5 mmol.L-1时,60 min内对40 mg.L-1的TBBPA的去除率可达95%以上.所得催化剂在反应中稳定,反应60 min后Co溶出量仅占总Co的0.27%,经4次重复使用仍具有较高催化活性;具有磁性,回收方便,在污水处理领域具有良好的应用前景.

Efficient Degradation of Tetrabromobisphenol A in Water by Co-doped BiFeO3

Co-doped BiFeO₃ was synthesized by the sol-gel method and used as a catalyst of persulfate (PMS) for the degradation of tetrabromobisphenol A (TBBPA).The effects of the amount of oxidizing agent, catalyst dosage, and the content of doped Co on the degradation of TBBPA were investigated.Under the optimized conditions (doping level of Co to Fe 0.1, dosage 0.5g ·L^-1, PMS concentration 2.5 mmol ·L^-1), the degradation removal of TBBPA within 60 min achieved more than 95%.Catalyst activity showed only a little loss after 4 recycles, and atomic absorption spectrometry (AAS) result showed that few Co ions were leached (0.27% of total Co).The catalyst can be recycled with magnet which shows a good application prospect in the wastewater treatment.