三维电极法处理含钴、锰废水

采用三维电极法对工业精对苯二甲酸（PTA）装置产生的含钴、锰废水进行处理。通过与传统二维电极法的处理效果进行比较,论证了三维电极法脱除Co²⁺,Mn²⁺的优越性。探究了填料类型、极板间电压、粒子电极填充比（粒子电极质量（g）与废水体积（mL）的比）、极板间距等工艺参数对Co²⁺,Mn²⁺脱除率的影响。实验结果表明,适宜的工艺条件为：采用柱状活性炭颗粒作为粒子电极,掺混柱状聚四氟乙烯（PTFE）颗粒作为绝缘粒子,极板间电压25 V,粒子电极填充比4∶8,极板间距8 cm。在此条件下处理Co²⁺,Mn²⁺初始质量浓度分别为108,208 mg/L的废水,60 min后,Co²⁺和Mn²⁺的脱除率分别高达97.1%和95.0%。而二维电极法的Co²⁺和Mn²⁺的脱除率仅分别为34.1%和15.8%。

Treatment of cobalt and manganese containing wastewater by three-dimensional electrode method

The wastewater containing cobalt and manganese from purified terephthalic acid （PTA）industrial plant was treated by three-dimensional electrode method. Compared with the treatment effect of traditional two-dimensional electrode method,the advantages of three-dimensional electrode method are demonstrated. The effects of packing type,voltage between plates,filling ratio of particle electrodes （ratio of particle electrodes mass （g）to wastewater volume （mL））and distance between plates on Co²⁺ and Mn²⁺ removal rate were studied. The results show that the suitable process conditions are as follows：using column activated carbon particles as the particle electrode,using the column polytetrafluoroethylene （PTFE）particles as the insulating particles,the voltage between plates is 25 V,the filling ratio of particle electrode is 4∶8,and the distance between plates is 8 cm. Under these conditions,the removal rates of Co²⁺ and Mn²⁺ can be as high as 97.1% and 95.0% respectively after 60 min treatment of wastewater with the initial mass concentration of Co²⁺ and Mn²⁺ of 108 and 208 mg/L. However,the removal rate of Co²⁺ and Mn²⁺ by two-dimensional electrode method is only 34.1% and 15.8%,respectively.