凹凸棒石基复合材料处理印染废水的研究

Treating Dyeing Wastewater by Attapulgite Composites

以凹凸棒石为载体,钛酸四丁酯为原料,通过溶胶-凝胶法,制成TiO2/凹凸棒石基复合材料(TiO2/ATT),并对所制得的复合材料进行了XRD和BET表征。在波长为254 nm的16 W紫外灯光照下,以活性黑KN-B印染废水为脱色对象,分别探讨了TiO2/凹凸棒石复合材料的煅烧温度、投加量、活性黑KN-B染料的初始浓度、溶液的pH值和反应温度等因素对印染废水脱色率的影响。实验结果表明:用煅烧温度500℃的TiO2/凹凸棒石基复合材料处理活性黑KN-B印染废水,催化剂的投加量为15 g/L、活性黑KN-B的初始浓度为10 mg/L、pH小于7、反应温度为20℃时,光催化反应4 h内即能达到较高的去除率,对活性黑KN-B的脱色率可达95%以上。

With attapulgite as the carrier, tetrabutyl titanate as raw material, TiOJattapulgite composites （TiO2/ATP）of different temperatures were prepared by sol-gel method. The morphology and structures were characterized by XRD and BET. Under 16 W ultraviolet lamp with the wave length of 254 nm and Reactive Black KN-B dye as the degeneration object, the effects of calcined temperature of TiO2/ATP composite, adsorbent dose, initial dye concentration, solution and reaction temperature on the decoloration rate of Reactive Black KN-B were investigated respectively. Experimental results showed with TiO2/ATT of calcination temperature 500 ℃ processing Reactive Black KN-B simulated wastewater, the amount of catalyst 15 g/L, initial concentration of Reactive Black dye 10 mg/L, pH value less than 7 and reaction temperature 20℃, the photocatalytic reaction had a higher decoloration rate in 4 h of reaction, and decoloration rate could reach 95% on Black KN-B dye.