Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO2 Photocatalytic Processes
This study discussed the photoreduction of Cr(VI) ions in aqueous solutions by UV/TiO2 photocatalytic processes under various operational factors. Experimental results showed that the removal rate of Cr(VI) increased with decreasing solution pH values and with increasing dosages of organic compounds...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2012/381971 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850167209313173504 |
|---|---|
| author | Chih Ming Ma Yung Shuen Shen Po Hsiang Lin |
| author_facet | Chih Ming Ma Yung Shuen Shen Po Hsiang Lin |
| author_sort | Chih Ming Ma |
| collection | DOAJ |
| description | This study discussed the photoreduction of Cr(VI) ions in aqueous solutions by UV/TiO2 photocatalytic processes under various operational factors. Experimental results showed that the removal rate of Cr(VI) increased with decreasing solution pH values and with increasing dosages of organic compounds, indicating that the recombination rate of electrons and h+ can be retarded in the reaction systems by the addition of the scavenger, thus raising the reaction rate of Cr(VI). The relationship of the chemical reaction rate of Cr(VI), TiO2 dosage, and changes of Cr(VI) concentration was expressed by the pseudo-first-order kinetic equation. Comparing the experimental results of two different doping metals in modified TiO2 photoreduction systems, the removal rate of Cr(VI) by the Ag/TiO2 process is larger, possibly because the electron transferring ability of Ag is superior to that of Cu. However, the photoreduction rates of Cr(VI) by modified UV/TiO2 processes are worse than those by a nonmodified commercial UV/TiO2 process. |
| format | Article |
| id | doaj-art-e27dc8a481b84b139a224bc0557c9d02 |
| institution | OA Journals |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-e27dc8a481b84b139a224bc0557c9d022025-08-20T02:21:14ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/381971381971Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO2 Photocatalytic ProcessesChih Ming Ma0Yung Shuen Shen1Po Hsiang Lin2Department of Cosmetic Application and Management, St. Mary’s Medicine Nursing and Management College, Yi-Lan 266, TaiwanHolistic Education Center, Mackay Medical College, Taipei 252, TaiwanDepartment of Environmental Engineering, Da-Yeh University, Changhwa 512, TaiwanThis study discussed the photoreduction of Cr(VI) ions in aqueous solutions by UV/TiO2 photocatalytic processes under various operational factors. Experimental results showed that the removal rate of Cr(VI) increased with decreasing solution pH values and with increasing dosages of organic compounds, indicating that the recombination rate of electrons and h+ can be retarded in the reaction systems by the addition of the scavenger, thus raising the reaction rate of Cr(VI). The relationship of the chemical reaction rate of Cr(VI), TiO2 dosage, and changes of Cr(VI) concentration was expressed by the pseudo-first-order kinetic equation. Comparing the experimental results of two different doping metals in modified TiO2 photoreduction systems, the removal rate of Cr(VI) by the Ag/TiO2 process is larger, possibly because the electron transferring ability of Ag is superior to that of Cu. However, the photoreduction rates of Cr(VI) by modified UV/TiO2 processes are worse than those by a nonmodified commercial UV/TiO2 process.http://dx.doi.org/10.1155/2012/381971 |
| spellingShingle | Chih Ming Ma Yung Shuen Shen Po Hsiang Lin Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO2 Photocatalytic Processes International Journal of Photoenergy |
| title | Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO2 Photocatalytic Processes |
| title_full | Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO2 Photocatalytic Processes |
| title_fullStr | Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO2 Photocatalytic Processes |
| title_full_unstemmed | Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO2 Photocatalytic Processes |
| title_short | Photoreduction of Cr(VI) Ions in Aqueous Solutions by UV/TiO2 Photocatalytic Processes |
| title_sort | photoreduction of cr vi ions in aqueous solutions by uv tio2 photocatalytic processes |
| url | http://dx.doi.org/10.1155/2012/381971 |
| work_keys_str_mv | AT chihmingma photoreductionofcrviionsinaqueoussolutionsbyuvtio2photocatalyticprocesses AT yungshuenshen photoreductionofcrviionsinaqueoussolutionsbyuvtio2photocatalyticprocesses AT pohsianglin photoreductionofcrviionsinaqueoussolutionsbyuvtio2photocatalyticprocesses |