单室微生物电解池处理含镍模拟废水

Nickel efficiency removal in single-chamber microbial electrolysis cells

为了利用废水中的有机物及降低重金属浓度,研究了单室微生物电解池对模拟废水中Ni(Ⅱ)的去除,探索了不同影响因子对镍的去除影响。在最佳外加电压0.7 V、最适初始pH 7.0、100 mmol·L^(-1)PBS下,单室微生物电解池运行48 h,对12.5 mg·L^(-1)Ni(Ⅱ)和1 000 mg·L^(-1)COD的去除率分别可达到(88.2±2.5)%和(72.2±0.9)%,有效地降低了重金属浓度,拓展了生物电化学系统系统在去除重金属离子废水方面的应用。

In order to reduce the amount of heavy metals in wastewater,the application of a single-chamber mi- crobial electrolysis cell （SMEC）for the removing Ni （ Ⅱ ）in simulated wastewater was studied, and the effect of different factors on the efficiency of nickel removal was explored. Under the conditions of an applied voltage of 0.7 V, optimal initial pH of 7.0,100 mmol · L^- 1 PBS, operating time of 48 h, the removal efficiencies of 12.5 mg· L^-1 Ni（11）and 1 000 mg · L^-1 COD were （88.2 ±2.5）% and （72.2 ±0.9）%,respectively in an SMEC. This method effectively reduces the concentration of heavy metals and broadens the application of the bio- logical electrical system （BES）in removing heavy metals with energy generation.