Enhanced photocatalytic oxidation of As3+ using titania nanoparticles for arsenic removal from water

Kocabaş, Özlem Züleyha and Yürüm, Yuda (2010) Enhanced photocatalytic oxidation of As3+ using titania nanoparticles for arsenic removal from water. In: 3rd National Catalysis Congress (NCC), Zonguldak, Turkey

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Abstract

Excessively high arsenic concentration in natural water and industrial wastewater is now a threatening problem for many countries especially Bangladesh, India, Germany, China and Turkey [1]. Titanium dioxide, a well-known adsorbent material, has been extensively tested for arsenic removal from water. However, arsenate ions (As5+) adsorbs more strongly onto the solid phase of adsorbent than arsenite ions (As3+). Therefore, the effectiveness of TiO2 nanoparticles in removing As3+ species from water have been enhanced by the photocatalytic oxidation in the presence of oxygen in ultraviolet (UV) light. In the present study, the photocatalytic oxidation of As3+ to As5+ is investigated in UV-illuminated TiO2. Batch adsorption experiment was carried out to analyze removal capacity of the TiO2 nanoparticles with and without presence of photocatalytic oxidation reaction and the adsorption isotherms were obtained. Keywords: Arsenic; Photocatalytic oxidation; Adsorption; Titanium dioxide nanoparticles [1] D. Mohan, C.U. Pittman Jr, Arsenic, Journal of Hazardous Materials , vol.142, 2007, 1–53.
Item Type: Papers in Conference Proceedings
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Chemistry
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Faculty of Engineering and Natural Sciences
Depositing User: Yuda Yürüm
Date Deposited: 12 Nov 2010 14:56
Last Modified: 26 Apr 2022 08:57
URI: https://research.sabanciuniv.edu/id/eprint/15157

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