活性炭电极电吸附甲基橙废水研究

STUDY ON ELECTROSORPTION OF METHYL ORANGE ON ACTIVATED CARBON ELECTRODE

自制一种新型粘结剂(NB),并用此粘结剂与活性炭粉末(AC)混合制备活性炭电极(ACE)。利用数码相机、扫描电子显微镜(SEM)及傅立叶红外光谱仪(FTIR)对电极表面形貌、亲水性及电极表面的官能团进行分析,并用此电极进行电吸附甲基橙(MO)的操作条件及动力学研究。结果表明,电极亲水性好,并含有大量含氧官能团;在MO初始质量浓度为40 mg/L、电解质(Na2SO4)质量浓度5.0 mg/L、pH为6.5、温度为25℃时,600 mV电压下,MO的去除率达到88.35%,较开路时提高了17.18%;动力学分析表明,在AC电极上电吸附MO溶液符合Lagergren 1级吸附动力学模型。

In this paper, a novel liquid binder （NB） was synthesized for the development of activated carbon electrode （ACE）. The surface morphology, hydrophilic and surface functional groups of ACE were analyzed by digital camera, SEM and FTIR. In addition, the electrosorption behavior of methyl orange （MO） and kinetic of ACE was studied. The results showed that the ACE had good wettability and there were numerous fimctional groups including oxygen. At a temperature of 25 ~C, positive polarization of 600 mV, initial concentration of 40 mg/L, Na2SO4 of 5.0 mg/L and pH of 6.5, the removal ratio of MO could be up to 88.35%, an increase of 17.18% was got compared to that of an open circuit under the same conditions. The kinetic analysis indicated that the removal of MO by electrosorprtion could be describle by Lagergren equation.