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为了去除冶金工业废水中的有害成份,研究活性炭纤维(ACF)电吸附技术。以SCN-为模型物,采用三电极电解池以紫外分光光度法(UV)检测电化学极化对吸附SCN-的影响。实验结果表明,正极化可以强化ACF对SCN-的吸附,而负极化减弱对SCN-的吸附,这一电吸附现象在一定程度上具有可逆性。L angm u ir方程可以描述ACF对SCN-的吸附和电吸附的平衡线。吸附动力学实验表明,与未极化比较,电吸附时ACF在开始阶段(30m in内)能够较快地达到较高的吸附量,使溶液中的SCN-浓度迅速降低。再生过程正极化还可以使活性炭纤维的孔径增大,从而增强活性炭纤维的吸附量。
In order to remove the harmful components in metallurgical industrial wastewater, activated carbon fiber (ACF) electrosorption technology was studied. Using SCN- as a model, the effect of electrochemical polarization on the adsorption of SCN- was examined by UV spectrophotometry (UV) using a three-electrode electrolytic cell. The experimental results show that the positive polarization can enhance the ACF adsorption of SCN-, while the negative polarization weakened the adsorption of SCN-, this phenomenon of electrosorption to a certain extent, has reversibility. L angm u ir equation describes the equilibrium line of ACF adsorption and electrosorption on SCN-. Adsorption kinetics experiments show that compared with the unpolarized, the ACF can reach a higher adsorption capacity quickly in the initial stage (within 30m in) during electrosorption, so that the SCN-concentration in the solution decreases rapidly. The positive polarization of the regenerative process can also increase the pore size of the activated carbon fiber, thereby enhancing the adsorption capacity of the activated carbon fiber.