阴离子浓度对三维粒子电极光电催化含盐染料废水的影响  

Effect of Anion Concentration on Photoelectrocatalysis of Salt-containing Dye Wastewater With the Three-dimensional Particle Electrode

作　　者：薛东宇 苏会东[1] 孙志伟[1] XUE Dong-yu;SU Hui-dong;SUN Zhi-wei(School of Environmental and Chemical Engineering,Shenyang Ligong University,Liaoning Shenyang 110159,China)

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳110159

出　　处：《当代化工》2018年第11期2273-2276,共4页Contemporary Chemical Industry

摘　　要：采用溶胶—凝胶法制备玻璃珠负载TiO_2粒子(TiO_2/玻璃珠),与铁屑组成粒子电极,以钛网为主电极,石墨片为阴极,以亚甲基蓝与不同浓度的氯化钠、磷酸钠、碳酸钠、硅酸钠、硫酸钠等盐溶液模拟含盐染料废水,利用三维粒子电极光电催化作用对含盐染料废水进行降解研究,结果表明:当染料废水浓度为5mg/L亚甲基蓝50 mL,粒子电极配比为0.2 g的铁屑和0.8 g的TiO_2/玻璃珠,主电极间距1.5 cm,外加电压2 V,以20 W紫外灯为光源,紫外灯距离废水液面高度为20 cm,三维光电体系光催化90 min染料废水的降解率达到24.42%。盐度对三维光电体系的影响比较大,不同的盐溶液不同的浓度对降解率的影响也不相同,氯化钠、磷酸钠、碳酸钠、硅酸钠、硫酸钠五种高盐度时对降解率的影响,最好的降解率分别为15.29%、21.26%、20.78%、24.42%、15.82%。TiO2/glass bead particles were prepared by sol-gel method,and then the particles electrodes of TiOz/glass beads were obtained by mixing iron particles with TiO2/glass bead particles.Taking titanium mesh as anode and graphite as cathode,simulated salt-containing dye wastewater with methylene blue and NaC1,Na3PO4,Na2CO3,Na2Si03, Na2SO4was degraded by three-dimensional particles electrode photoelectrocatalytic system.The photoelectrocatalytic experiment showed that,when iron particles was 0.2g,TiO2/glass beads was 0.8g,electrode distance was 1.5 era,external voltage was 2V,methylene blue solution concentration was 5mg/L,the light source was 20W UV lamp and illumination height was 20cm,the degradation rate of methylene blue reached 24.42%in 90min.The effect of salinity on three-dimensional photoelectric system was great,and the effect of different concentration of salt solution on degradation rate was different.The best degradation rates of NaC1,Na3PO4,Na2CO3,Na2SiO3,NazSO4were 15.29%, 21.26%,20.78%,24.42%and 15.82%respectively.

关 键 词：阴离子 三维粒子电极 光电催化 含盐染料废水 

分 类 号：O643.32[理学—物理化学] TQ032[理学—化学]