Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV
Due to the present water shortage and environmental problems associated with industrial effluent, investigation of novel treatment technologies is an essential approach. Being a highly toxic chemical of asphyxiating characteristics, cyanide is seen as a major environmental pollutant in a wide range...
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| Format: | Article |
| Language: | English |
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Kurdistan University of Medical Sciences
2015-08-01
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| Series: | Journal of Advances in Environmental Health Research |
| Subjects: | |
| Online Access: | http://jaehr.muk.ac.ir/article_40203_af11ed1a5a7fabb09c0ea6fd8ec53a4c.pdf |
| _version_ | 1819089312739753984 |
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| author | Shima Rezaei Hadi Rezaei Meghdad Pirsaheb Saeb Ahmadi Hooshyar Hossini |
| author_facet | Shima Rezaei Hadi Rezaei Meghdad Pirsaheb Saeb Ahmadi Hooshyar Hossini |
| author_sort | Shima Rezaei |
| collection | DOAJ |
| description | Due to the present water shortage and environmental problems associated with industrial effluent, investigation of novel treatment technologies is an essential approach. Being a highly toxic chemical of asphyxiating characteristics, cyanide is seen as a major environmental pollutant in a wide range of industrial effluents. The present study aimed to address the adsorption and photocatalytic degradation of cyanide using activated fly ash and TiO2/UV. To investigate the removal efficiency of cyanide, two sets of experiments were designed. First, cyanide was absorbed by activated fly ash and degraded via a photocatalytic process, individually. Second, simultaneous adsorption and degradation was examined. The removal efficiency of cyanide by modified fly ash (MFA), TiO2/UV, and their combination (MFA-TiO2/UV) was 76.1%, 81%, and 86.6%, respectively. Optimal conditions for the combination of activated fly ash AFA-TiO2/UV were contact time of 6 hours, temperature of 100 °C, and AFA: TiO2 ratio (w/w) of 1:1. Under these conditions, a maximum removal rate of 92.4% was obtained when 1.2 g of MFA/TiO2 was used with a pH value of 3 in the presence of UV light. Based on the results of cyanide removal, it can be concluded that the combination of adsorption and photocatalytic degradation with MFA-TiO2/UV can be utilized to improve the removal of cyanide from wastewater. |
| first_indexed | 2024-12-21T22:05:56Z |
| format | Article |
| id | doaj.art-42ee902c70c14fe2bf092bc61a01824b |
| institution | Directory Open Access Journal |
| issn | 2345-3990 2345-3990 |
| language | English |
| last_indexed | 2024-12-21T22:05:56Z |
| publishDate | 2015-08-01 |
| publisher | Kurdistan University of Medical Sciences |
| record_format | Article |
| series | Journal of Advances in Environmental Health Research |
| spelling | doaj.art-42ee902c70c14fe2bf092bc61a01824b2022-12-21T18:48:42ZengKurdistan University of Medical SciencesJournal of Advances in Environmental Health Research2345-39902345-39902015-08-013319620310.22102/jaehr.2015.4020340203Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UVShima Rezaei0Hadi Rezaei1Meghdad Pirsaheb2Saeb Ahmadi3Hooshyar Hossini4Department of Environmental Health Engineering, Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, IranSanandaj Health Center AND Department of Environmental Health Engineering, School of Public Health, Kurdistan University of Medical Sciences, Sanandaj, IranDepartment of Environmental Health Engineering, School of Health, Kermanshah University of Medical Sciences, Kermanshah, IranDepartment of Chemical Engineering, School of Chemical Engineering, Tarbiat Modares University, Tehran, IranDepartment of Environmental Health Engineering, School of Health, Kermanshah University of Medical Sciences, Kermanshah, IranDue to the present water shortage and environmental problems associated with industrial effluent, investigation of novel treatment technologies is an essential approach. Being a highly toxic chemical of asphyxiating characteristics, cyanide is seen as a major environmental pollutant in a wide range of industrial effluents. The present study aimed to address the adsorption and photocatalytic degradation of cyanide using activated fly ash and TiO2/UV. To investigate the removal efficiency of cyanide, two sets of experiments were designed. First, cyanide was absorbed by activated fly ash and degraded via a photocatalytic process, individually. Second, simultaneous adsorption and degradation was examined. The removal efficiency of cyanide by modified fly ash (MFA), TiO2/UV, and their combination (MFA-TiO2/UV) was 76.1%, 81%, and 86.6%, respectively. Optimal conditions for the combination of activated fly ash AFA-TiO2/UV were contact time of 6 hours, temperature of 100 °C, and AFA: TiO2 ratio (w/w) of 1:1. Under these conditions, a maximum removal rate of 92.4% was obtained when 1.2 g of MFA/TiO2 was used with a pH value of 3 in the presence of UV light. Based on the results of cyanide removal, it can be concluded that the combination of adsorption and photocatalytic degradation with MFA-TiO2/UV can be utilized to improve the removal of cyanide from wastewater.http://jaehr.muk.ac.ir/article_40203_af11ed1a5a7fabb09c0ea6fd8ec53a4c.pdfadsorptionmfa-tio2/uvcyanidephotocatalytic degradation |
| spellingShingle | Shima Rezaei Hadi Rezaei Meghdad Pirsaheb Saeb Ahmadi Hooshyar Hossini Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV Journal of Advances in Environmental Health Research adsorption mfa-tio2/uv cyanide photocatalytic degradation |
| title | Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV |
| title_full | Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV |
| title_fullStr | Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV |
| title_full_unstemmed | Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV |
| title_short | Simultaneous degradation and adsorption of cyanide using modified fly Ash and TiO2/UV |
| title_sort | simultaneous degradation and adsorption of cyanide using modified fly ash and tio2 uv |
| topic | adsorption mfa-tio2/uv cyanide photocatalytic degradation |
| url | http://jaehr.muk.ac.ir/article_40203_af11ed1a5a7fabb09c0ea6fd8ec53a4c.pdf |
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