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Effects of TiO2 dosage, pH and temperature on decolorization of C.I. Reactive Red 2 in a UV/US/TiO2 system.
J Hazard Mater. 2009 Sep 30; 169(1-3):1179-83.JH

Abstract

This study elucidates the decolorization of C.I. Reactive Red 2 (RR2) in ultrasound (US), US/TiO(2), ultraviolet (UV)/TiO(2) and UV/US/TiO(2) systems. The effects of TiO(2) dosage, pH and temperature on RR2 decolorization were determined in a UV/US/TiO(2) system. The pseudo-first-order decolorization rate constants of 0.5, 1 and 2g/l TiO(2) in the UV/US/TiO(2) system were 0.45, 0.57 and 0.94 h(-1), respectively. In the UV/US/TiO(2) system, the decolorization rate of RR2 declines as pH increases, and increases as temperature increasing. At pH 7, the decolorization rates followed the order of UV/US/TiO(2) (0.94 h(-1))>UV/TiO(2) (0.85h(-1))>US/TiO(2) (0.25 h(-1))>US. The activation energy of the UV/US/TiO(2) system at pHs of 4, 7 and 10 was 6.58, 11.62 and 21.32kJ/mol, respectively. Experimental results suggest that the RR2 decolorization in the UV/US/TiO(2) system was a diffusion-controlled reaction.

Authors+Show Affiliations

Department of Environmental Engineering, Da-Yeh University, 168, University Road, Dacun, Changhua, Taiwan, ROC. chunghsinwu@yahoo.com.twNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

19450925

Citation

Wu, Chung-Hsin, and Chien-Hwa Yu. "Effects of TiO2 Dosage, pH and Temperature On Decolorization of C.I. Reactive Red 2 in a UV/US/TiO2 System." Journal of Hazardous Materials, vol. 169, no. 1-3, 2009, pp. 1179-83.
Wu CH, Yu CH. Effects of TiO2 dosage, pH and temperature on decolorization of C.I. Reactive Red 2 in a UV/US/TiO2 system. J Hazard Mater. 2009;169(1-3):1179-83.
Wu, C. H., & Yu, C. H. (2009). Effects of TiO2 dosage, pH and temperature on decolorization of C.I. Reactive Red 2 in a UV/US/TiO2 system. Journal of Hazardous Materials, 169(1-3), 1179-83. https://doi.org/10.1016/j.jhazmat.2009.04.064
Wu CH, Yu CH. Effects of TiO2 Dosage, pH and Temperature On Decolorization of C.I. Reactive Red 2 in a UV/US/TiO2 System. J Hazard Mater. 2009 Sep 30;169(1-3):1179-83. PubMed PMID: 19450925.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of TiO2 dosage, pH and temperature on decolorization of C.I. Reactive Red 2 in a UV/US/TiO2 system. AU - Wu,Chung-Hsin, AU - Yu,Chien-Hwa, Y1 - 2009/04/24/ PY - 2009/01/08/received PY - 2009/04/15/revised PY - 2009/04/15/accepted PY - 2009/5/20/entrez PY - 2009/5/20/pubmed PY - 2009/9/29/medline SP - 1179 EP - 83 JF - Journal of hazardous materials JO - J Hazard Mater VL - 169 IS - 1-3 N2 - This study elucidates the decolorization of C.I. Reactive Red 2 (RR2) in ultrasound (US), US/TiO(2), ultraviolet (UV)/TiO(2) and UV/US/TiO(2) systems. The effects of TiO(2) dosage, pH and temperature on RR2 decolorization were determined in a UV/US/TiO(2) system. The pseudo-first-order decolorization rate constants of 0.5, 1 and 2g/l TiO(2) in the UV/US/TiO(2) system were 0.45, 0.57 and 0.94 h(-1), respectively. In the UV/US/TiO(2) system, the decolorization rate of RR2 declines as pH increases, and increases as temperature increasing. At pH 7, the decolorization rates followed the order of UV/US/TiO(2) (0.94 h(-1))>UV/TiO(2) (0.85h(-1))>US/TiO(2) (0.25 h(-1))>US. The activation energy of the UV/US/TiO(2) system at pHs of 4, 7 and 10 was 6.58, 11.62 and 21.32kJ/mol, respectively. Experimental results suggest that the RR2 decolorization in the UV/US/TiO(2) system was a diffusion-controlled reaction. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19450925/Effects_of_TiO2_dosage_pH_and_temperature_on_decolorization_of_C_I__Reactive_Red_2_in_a_UV/US/TiO2_system_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)00634-7 DB - PRIME DP - Unbound Medicine ER -