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Title

Optimization and Modeling of Microcystin-LR Degradation by TiO۲ Photocatalyst Using Response Surface Methodology

Year: 1399
COI: JR_JEHSD-5-3_006
Language: EnglishView: 68
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Authors

Negar Jafari - Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran and Department of Environmental Health Engineering, School of Health, Isfahan University of Medica
Afshin Ebrahimi - Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran and Department of Environmental Health Engineering, School of Health, Isfahan University of Medica
Karim Ebrahimpour - Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran and Department of Environmental Health Engineering, School of Health, Isfahan University of Medica
Ali Abdolahnejad - Department of Public Health, Maragheh University of Medical Sciences, Maragheh, Iran.

Abstract:

Introduction: Microcystin-leucine arginine (MC-LR) is a toxin with harmful effects on the liver, kidney, heart, and gastrointestinal tract. So, effective removal of MC-LR from water resources is of great importance. The aim of this study was to remove microcystin-LR (MC-LR) from aqueous solution by Titanium Dioxide (TiO۲). Materials and Methods: In the present study, TiO۲, as a semiconductor, was used for photodegradation of MC-LR under ultraviolet light (UV). The Response Surface Methodology was applied to investigate the effects of operating variables such as pH (A), contact time (B), and catalyst dose (B) on the removal of MC-LR. The MC-LR concentration was measured by high-performance liquid chromatography (HPLC). Results: The results showed that single variables such as A, B, and C had significant effects on MC-LR removal (pvalue < ۰.۰۵). In other words, increase of the contact time and catalyst dose had a positive effect on enhancing the removal efficiency of MC-LR, but the effect of pH was negative. The analysis of variance showed that BC, A۲, and C۲ variables had a significant effect on the MC-LR removal (pvalue < ۰.۰۵). Finally, the maximum removal efficiency of MC-LR was ۹۵.۱%, which occurred at pH = ۵, contact time = ۳۰ minutes, and catalyst dose = ۱ g/l. Conclusion: According to the findings, TiO۲, as a photocatalyst, had an appropriate effect on degradation of the MC-LR.

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This Paper COI Code is JR_JEHSD-5-3_006. Also You can use the following address to link to this article. This link is permanent and is used as an article registration confirmation in the Civilica reference:

https://civilica.com/doc/1346743/

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Jafari, Negar and Ebrahimi, Afshin and Ebrahimpour, Karim and Abdolahnejad, Ali,1399,Optimization and Modeling of Microcystin-LR Degradation by TiO۲ Photocatalyst Using Response Surface Methodology,https://civilica.com/doc/1346743

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