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以凹凸棒土和活性污泥为材料制备多孔载体,采用溶胶-凝胶法制备光催化剂TiO2和多孔吸附光催化复合材料。通过单因素实验,探究降解汞离子(Hg2+)的最优条件,研究TiO2光催化剂降解汞污染物的机制。结果表明:多孔吸附光催化复合材料质量浓度为20g/L,当pH=7.0时,在紫外光源照射10min,Hg2+的还原率达最大,Hg2+的去除率可达71.58%。最后,考察了利用多孔吸附光催化复合材料处理含甲基汞(CH3-Hg+)废水的可行性。
Porous support was prepared from attapulgite and activated sludge. Photocatalyst TiO2 and porous adsorption photocatalytic composite were prepared by sol - gel method. Through single factor experiments, explore the optimum conditions for the degradation of mercury ion (Hg2 +), to study the mechanism of degradation of mercury pollutants TiO2 photocatalyst. The results showed that the mass concentration of porous photocatalytic composite was 20g / L. When the pH value was 7.0, the reduction rate of Hg2 + reached the maximum at the irradiation time of 10min. The removal rate of Hg2 + reached 71.58%. Finally, the feasibility of treating the wastewater containing methylmercury (CH3-Hg +) by porous adsorption photocatalytic composite was investigated.