Feasibility Study of Denitrification of Drinking Water Using Photocatalytic Substrate over Ultra-High Performance Concrete
Subject Areas : Water and wastewater technologySama Tajasosi 1 , Jalil Barandoust 2 , Ramazan Vagheei 3 , Fariba Ostovar 4 , saeed poorkareem 5
1 - Senior Research Expert
2 - ُSenior Research Expert
3 - Chairman
4 - Faculty member of Environmental Institute, Academic Center for Education, Culture and Research, Guilan, Iran
5 - Expert of sanitization
Keywords: Advanced Oxidation, Cement Composite, Photocatalytic Treatment, Titanium Dioxide,
Abstract :
Denitrification of drinking water has a research history of more than three decades in the field of water treatment and is still the subject of many research projects. The main purpose of this study is to obtain or modify methods for removing nitrate from drinking water in an economic way and force minimal adverse effects on the environment. The use of photocatalytic process for denitrification is not new, but there are still many ambiguities. In this study, the feasibility of using two different photocatalysts over the ultra-high performance concrete (UHPC) substrate was discussed. This new substrate is fabricated by immobilizing the photocatalyst inside a cement matrix which acts as an active layer over the UHPC surface. Optimum long-term lifecycle and higher efficiency of this active surface is achieved without a significant drop of the photocatalyst activity near the surface. In this study, the possibility of using photocatalytic composite layers over the elements made of UHPC for applications such as water supply channels was evaluated and the challenges of using such layers on UHPC surfaces were described. According to the studies, it was found that the use of fixed cement composite bed for photocatalytic treatment has advantages over other methods of photocatalytic water treatment.
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