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Lifetime and regeneration of immobilized titania for photocatalytic removal of aqueous hexavalent chromium.
J Hazard Mater. 2005 Sep 30; 124(1-3):53-8.JH

Abstract

Immobilized titania (TiO2) batch reactors reduced hexavalent chromium (Cr(VI)) in the form of potassium dichromate (K2Cr2O7) to trivalent chromium (Cr(III)) in aqueous solution at pH 3 under 171 W/m2 light intensity. The light source was a 125-W ultraviolet (UV) lamp. The Cr(VI) reduction showed zero-order kinetics (k0), while the Cr(VI) adsorption fitted with first-order kinetics (k(1st)). Adsorption capacity increased with increasing initial Cr(VI) concentration, and the area of immobilized TiO2 limited the reduction efficiency. The lifetime of fresh immobilized TiO2 was approximately 14 h. In addition, the regeneration of TiO2 with 3M sodium hydroxide (NaOH) was necessary to improve adsorption reaction.

Authors+Show Affiliations

Environmental Engineering Department, Kasetsart University, 50 Phaholyothin Rd., Chatuchak, Bangkok 10900, Thailand. seree4008@ram1.ru.ac.thNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16046253

Citation

Tuprakay, Seree, and Winai Liengcharernsit. "Lifetime and Regeneration of Immobilized Titania for Photocatalytic Removal of Aqueous Hexavalent Chromium." Journal of Hazardous Materials, vol. 124, no. 1-3, 2005, pp. 53-8.
Tuprakay S, Liengcharernsit W. Lifetime and regeneration of immobilized titania for photocatalytic removal of aqueous hexavalent chromium. J Hazard Mater. 2005;124(1-3):53-8.
Tuprakay, S., & Liengcharernsit, W. (2005). Lifetime and regeneration of immobilized titania for photocatalytic removal of aqueous hexavalent chromium. Journal of Hazardous Materials, 124(1-3), 53-8.
Tuprakay S, Liengcharernsit W. Lifetime and Regeneration of Immobilized Titania for Photocatalytic Removal of Aqueous Hexavalent Chromium. J Hazard Mater. 2005 Sep 30;124(1-3):53-8. PubMed PMID: 16046253.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Lifetime and regeneration of immobilized titania for photocatalytic removal of aqueous hexavalent chromium. AU - Tuprakay,Seree, AU - Liengcharernsit,Winai, PY - 2004/11/19/received PY - 2005/03/09/revised PY - 2005/03/14/accepted PY - 2005/7/28/pubmed PY - 2006/1/18/medline PY - 2005/7/28/entrez SP - 53 EP - 8 JF - Journal of hazardous materials JO - J Hazard Mater VL - 124 IS - 1-3 N2 - Immobilized titania (TiO2) batch reactors reduced hexavalent chromium (Cr(VI)) in the form of potassium dichromate (K2Cr2O7) to trivalent chromium (Cr(III)) in aqueous solution at pH 3 under 171 W/m2 light intensity. The light source was a 125-W ultraviolet (UV) lamp. The Cr(VI) reduction showed zero-order kinetics (k0), while the Cr(VI) adsorption fitted with first-order kinetics (k(1st)). Adsorption capacity increased with increasing initial Cr(VI) concentration, and the area of immobilized TiO2 limited the reduction efficiency. The lifetime of fresh immobilized TiO2 was approximately 14 h. In addition, the regeneration of TiO2 with 3M sodium hydroxide (NaOH) was necessary to improve adsorption reaction. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/16046253/Lifetime_and_regeneration_of_immobilized_titania_for_photocatalytic_removal_of_aqueous_hexavalent_chromium_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(05)00146-9 DB - PRIME DP - Unbound Medicine ER -