负载CoO催化粒子电极的制备及其对腐殖酸的降解

以活性炭粉为载体，钴氧化物为催化活性组分，经造粒后制得PAC-Co催化粒子电极，研究了用于腐殖酸（HA）降解的PAC-Co催化粒子电极的制备条件，并采用扫描电子显微镜、X射线衍射和比表面积分析仪等对粒子电极进行表征。结果显示，焙烧温度600℃、焙烧时间2 h、Co（NO3）2浸渍液浓度0.1 mol·L-1为PAC-Co最佳制备条件。在I=0.2 A、进水流量9 mL·min-1、Na2SO4电解质0.01 mol·L-1、pH=7条件下，对于初始COD0=200 mg·L-1的模拟HA废水，反应70 min后，PAC-Co对UV254、色度及COD的去除分别达到95.09、97.84与91.45%，去除率均高于普通活性炭颗粒所制备的GAC-Co粒子电极。

Preparation of electro-catalytic particle electrodes coated by CoO and its performance on humic acid degradation

Activated carbon powder (PAC) was selected as carrier and cobalt oxide was applied as catalyst. A kind of particle electrode (PAC-Co) was prepared by granulating the PAC modified with CoO to degrade humic acid. The conditions for preparation of the PAC-Co were studied for this paper. The appearance and characteristics of particle electrodes were investigated using scanning electron microscopy, X-ray diffraction, and an analyzer of specific surface area and pore size. The results showed that the optimal preparation conditions were:calcination temperature 600℃, calcination for 2 h, and 0.1 mol·L-1 Co(NO3)2 for soaking. When the initial COD of the HA simulated influent was 200 mg·L-1, the removal efficiency of UV254, colorimetry, and COD reached 95.09, 97.84, and 91.45%, respectively, after 70 min under a current of 0.2 A, influent flow rate of 9 mL·min-1, 0.01 mol·L-1 Na2SO4, and pH 7. The HA removal of PAC-Co was higher than that of conventional GAC-Co particle electrodes.