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The combined electrochemical oxidation-solar-light/immobilized TiO2 film process was conducted to degrade an azo dye, Reactive Black 5 (RB5). The toxicity was also monitored by the Vibrio fischeri light inhibition test. The electrochemical oxidation rapidly decolorized RB5 (55, 110 μM) with a supporting electrolyte of 2 g l−1 NaCl at current density 277 A m−2 and pH 4. However, TOC mineralization and A310 removal were low. Additionally, the treated solution showed high biotoxicity. RB5 at 110 μM significantly retarded the de-colorization efficiency by using the solar-light/immobilized TiO2 film process. The combined electrochemical oxidation-solar-light/immobilized TiO2 process effectively increased the removal of color, A310, and TOC. The toxicity was also significantly reduced after 3 h of solar irradiation. The results indicated that the low-cost combined process is a potential technique for rapid treatment of RB5. 相似文献
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流化床TiO_2光催化降解乙醛气体的研究 总被引:5,自引:0,他引:5
光催化降解有害气体是一项新兴的颇有发展前途的环境友好催化新技术 ,采用溶胶 -凝胶法制得 1 0~ 30nm的二氧化钛 ,采用自制的流化床光催化气体反应器降解乙醛气体 ,流量 1 0 0mL/min ,乙醛气体浓度 1 .8~ 9mg/m3 ,降解率达到 80 %以上。 相似文献
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采用絮凝-光催化氧化工艺成功地处理了实际染料废水;研究了COD光催化降解动力学。COD和BOD5浓度分别为2169mg/L、295mg/L的染料废水,经絮凝-光催化处理后,出水COD和BOD5分别为214mg/L、18.5mg/L,去除率分别为90.1%、93.7%。向光催化体系中加入H2O2,可促进COD与BOD5的去除。该工艺可处理高浓度染料废水。 相似文献