Titanium dioxide catalyzed photocatalytic degradation of carboxylic acids from waste water: A review

被引：24
作者：
Gandhi, Vimal [1 ]
Mishra, Manish [1 ]
Joshi, P.A. [1 ]
机构：
[1] Department of Chemical Engineering, Shah-Schulman Center for Surface Science and Nanotechnology, Dharmsinh Desai University, Nadiad-387 001, Gujarat, College Road
来源：
Materials Science Forum | 2012年 / 712卷
关键词：
Carboxylic acids; Deactivation; Degradation pathways; Effect of adsorption; Heterogeneous photocatalysis;
D O I：
10.4028/www.scientific.net/MSF.712.175
中图分类号：
学科分类号：
摘要：
Among the new oxidation methods in advanced oxidation processes, heterogeneous photocatalysis based on UV/ titanium dioxide is one of the emerging technologies for degrading and totally mineralizing toxic and highly stable carboxylic acids from waste water has attracted great attention in last decade. The aliphatic and aromatic carboxylic acids are widely used as reactants or produced as main products or byproducts in various chemical process industries. These chemical process industries generates waste water containing significant amount of carboxylic acids, which need to be removed from waste water before disposal to natural water bodies due to the environmental restrictions and their hazardous effects on flora and fauna. This paper reviews photocatalytic degradation (PCD) process for various carboxylic acids in detail, including basic mechanism of titanium dioxide, effect of carboxylic acid structure and various reaction parameters like effect of initial concentration and kinetic study, catalyst loading, pH, adsorption and deactivation of the photocatalyst. A critical analysis of the available literature has been made and some general conclusions have been drawn related to the above mentioned parameters. The photocatalytic degradation pathways for carboxylic acids are also discussed to understand this process thoroughly. © (2012) Trans Tech Publications, Switzerland.
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页码：175 / 189
页数：14
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