玻璃负载TiO_2膜光催化降解垃圾渗滤液的研究

The study of photocatalytic degradation landfill leachate using TiO2 supported on glass

研究了以SOL=GEL法制备的TiO2膜光催化降解垃圾渗滤液的可行性，探讨了负载TiO2膜的影响因素及TiO2膜的催化活性，TiO2膜的最佳煅烧温度为450℃。测定了反应时间、进水浓度、pH值、光源强度等因素对垃圾渗滤液的CODcr和色度去除率的影响。光强越大，催化效果越好，光照时间越长，催化效果越好；溶液的初始浓度越大，降解率越低；反应液的在偏酸、碱的条件下有利于光催化氧化反应的进行。在最佳的实验条件下，TiO2膜的煅烧温度为450℃，溶液的pH值为3-4，垃圾渗滤液的初始CODcr为537mg·L^-1，光催化降解2h，CODcr和UV335的去除率分别为94．4％和96．9％。

The paper investigated the feasibility of photocatalytic degradation of organic pollutants in landfill leachate with solid-phase TiO2 film. researching the influence factors of preparing the TiO2 film and photocatalytic degradation activation, the optimum annealed temperature is 450℃. It is investigated that some factors such as. the irradiation time, initial pH of solution, initial concentration of solutions and light intensity infuluence the photocatalytic degradation rate of landfill leachate. The study showed the photocatalytic degradation rate increases with the increasing of the irradiation time and decreases with the increasing of the initial concentration, the condition of acidity and alkalescence are propitious to the action. On the optimal condition, the optimum annealed temperature is 450℃, initial pH of solution is 3-4, initial concentration of solution is 537 mg·L^-1, the irradiation time is 2h, the degradation of CODcr and UV335 are 94.4 % and 96.9 %.