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Study on Photocatalytic Decolorization of Humic Acid in Natural Waters over TiO2
Author(s): 
Pages: 591-595
Year: Issue:  6
Journal: JOURNAL OF CHEMICAL ENGINEERING OF CHINESE UNIVERSITIES

Keyword:  光催化脱色自然水体二氧化钛;
Abstract: 以125W(Emax=365nm) Hg灯为中心光源,BDH 粉末TiO2为光催化剂,研究了在圆柱状硼硅玻璃反应器中自然水体腐殖酸的光催化脱色.研究涉及的影响因素有:反应液初始浓度,反应液初始pH和催化剂用量,并对光氧化、光催化和催化过程进行了比较. 结果发现光催化是一行之有效的去除水体颜色的方法.在C0=20 mg.L-1, pH=7, TiO2=1g.L-1 实验条件下,经2.5h 的光催化反应,大于95% 的颜色被脱除.增加催化剂用量,降低初始pH,可增加脱除效果.在研究的浓度范围内(C0≤20mg.L-1),光催化氧化脱色遵循准一级动力学方程.
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