电吸附去除水中Fe^(3+)研究

A Study on Electro-adsorption of Fe^(3+) in Water

采用活性炭纤维电极电吸附水中Fe^(3+),研究电压、Fe^(3+)初始浓度、pH值、温度对电吸附去除水中Fe^(3+)效果的影响。实验结果表明:随着电压升高,Fe^(3+)去除率升高;Fe^(3+)初始浓度越大,Fe^(3+)去除率降低,但活性炭纤维的吸附容量增大;溶液的pH值偏碱性时,Fe^(3+)的去除率较高;温度越高,Fe^(3+)去除率也越高,但是温度高于40℃时,由于溶液蒸发,Fe^(3+)浓度降低较慢。此外,活性炭纤维电极再生实验结果表明,活性炭纤维电吸附Fe^(3+)之后电极具有良好的再生性。

In this study,the activated carbon fiber electrodes are used to remove Fe^3＋ in water by electro-adsorption and the influence of voltage,initial concentration of Fe^3＋,pH value,and temperature on the removal ratio of Fe^3＋ is investigated.The results show that,with the increasing voltage,the Fe^3＋ removal ratio increases,that the bigger the initial concentration of Fe^3＋ is,the smaller the Fe^3＋removal ratio is,but the adsorption capacity of the activated carbon fiber increases,that when the pH of the solution is alkaline,Fe^3＋removal ratio increase with rising temperature,but when the temperature is higher than 40℃,Fe3 ＋concentration decreases slowly due to the evaporation of the solution.In addition,testing of the regeneration of activated carbon fiber indicates that the activated carbon fiber electrode,after used for electro-adsorption of Fe^3＋,has good reproducibility.