The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts
Polychlorinated dibenzo-p-dioxins (PCDD) are persistent toxic compounds that are ubiquitous in the environment. The photodegradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the presence of silver titanium oxide (AgTi) and silver titanium doped into the Y-zeolite (AgTiY) was tested using hig...
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2020
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| Online Access: | http://hdl.handle.net/11073/21438 |
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| _version_ | 1864513443794518016 |
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| author | Samara, Fatin |
| author2 | Ghalayini, Thouraya Abu Farha, Nedal Kanan, Sofian |
| author2_role | author author author |
| author_facet | Samara, Fatin Ghalayini, Thouraya Abu Farha, Nedal Kanan, Sofian |
| author_role | author |
| dc.creator.none.fl_str_mv | Samara, Fatin Ghalayini, Thouraya Abu Farha, Nedal Kanan, Sofian |
| dc.date.none.fl_str_mv | 2020 2021-04-25T10:32:27Z 2021-04-25T10:32:27Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | Samara, F.; Ghalayini, T.; Abu Farha, N.; Kanan, S. The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts. Catalysts 2020, 10, 957. https://doi.org/10.3390/catal10090957 2073-4344 http://hdl.handle.net/11073/21438 10.3390/catal10090957 |
| dc.language.none.fl_str_mv | en_US |
| dc.publisher.none.fl_str_mv | MDPI |
| dc.relation.none.fl_str_mv | https://doi.org/10.3390/catal10090957 |
| dc.subject.none.fl_str_mv | TCDD Tetrachlorodibenzo-p-dioxin (TCDD) photodegradation ELISA catalyst Enzyme Linked Immunosorbent Assay (ELISA) Zeolite Mixed metal oxides |
| dc.title.none.fl_str_mv | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts |
| dc.type.none.fl_str_mv | Peer-Reviewed Published version info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | Polychlorinated dibenzo-p-dioxins (PCDD) are persistent toxic compounds that are ubiquitous in the environment. The photodegradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the presence of silver titanium oxide (AgTi) and silver titanium doped into the Y-zeolite (AgTiY) was tested using high (254 nm) and mid (302 nm) energy UV irradiation sources. AgTi and AgTiY, both showed success in the photodegradation of 2,3,7,8-TCDD dissolved in methanol/tetrahydrofuran solution. Both catalysts were found to effectively decompose TCDD at 302 nm (lower energy) reaching in between 98–99% degradation after five hours, but AgTiY showed better performance than AgTi at 60 min reaching 91% removal. Byproducts of degradation were evaluated using Gas chromatography/mass spectrometry (GC–MS), resulting in 2,3,7-trichlorodibenzo-p-dioxin, a lower chlorinated congener and less toxic, as the main degradation product. Enzyme Linked Immunosorbent Assay (ELISA) was used to evaluate the relative toxicity of the degradation byproducts were a decrease in optical density indicated that some products of degradation could be potentially more toxic than the parent TCDD. On the other hand, a decrease in toxicity was observed for the samples with the highest 2,3,7,8-TCDD degradation, confirming that AgTiY irradiated at 302 nm is an excellent choice for degrading TCDD. This is the first study to report on the efficiency of silver titanium doped zeolites for the removal of toxic organic contaminants such as dioxins and furans from aquatic ecosystems. |
| format | article |
| id | aus_3fbece96d22d5c12d51443cec5bcdb0e |
| identifier_str_mv | Samara, F.; Ghalayini, T.; Abu Farha, N.; Kanan, S. The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts. Catalysts 2020, 10, 957. https://doi.org/10.3390/catal10090957 2073-4344 10.3390/catal10090957 |
| language_invalid_str_mv | en_US |
| network_acronym_str | aus |
| network_name_str | aus |
| oai_identifier_str | oai:repository.aus.edu:11073/21438 |
| publishDate | 2020 |
| publisher.none.fl_str_mv | MDPI |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based CatalystsSamara, FatinGhalayini, ThourayaAbu Farha, NedalKanan, SofianTCDDTetrachlorodibenzo-p-dioxin (TCDD)photodegradationELISA catalystEnzyme Linked Immunosorbent Assay (ELISA)ZeoliteMixed metal oxidesPolychlorinated dibenzo-p-dioxins (PCDD) are persistent toxic compounds that are ubiquitous in the environment. The photodegradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the presence of silver titanium oxide (AgTi) and silver titanium doped into the Y-zeolite (AgTiY) was tested using high (254 nm) and mid (302 nm) energy UV irradiation sources. AgTi and AgTiY, both showed success in the photodegradation of 2,3,7,8-TCDD dissolved in methanol/tetrahydrofuran solution. Both catalysts were found to effectively decompose TCDD at 302 nm (lower energy) reaching in between 98–99% degradation after five hours, but AgTiY showed better performance than AgTi at 60 min reaching 91% removal. Byproducts of degradation were evaluated using Gas chromatography/mass spectrometry (GC–MS), resulting in 2,3,7-trichlorodibenzo-p-dioxin, a lower chlorinated congener and less toxic, as the main degradation product. Enzyme Linked Immunosorbent Assay (ELISA) was used to evaluate the relative toxicity of the degradation byproducts were a decrease in optical density indicated that some products of degradation could be potentially more toxic than the parent TCDD. On the other hand, a decrease in toxicity was observed for the samples with the highest 2,3,7,8-TCDD degradation, confirming that AgTiY irradiated at 302 nm is an excellent choice for degrading TCDD. This is the first study to report on the efficiency of silver titanium doped zeolites for the removal of toxic organic contaminants such as dioxins and furans from aquatic ecosystems.American University of SharjahMDPI2021-04-25T10:32:27Z2021-04-25T10:32:27Z2020Peer-ReviewedPublished versioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfSamara, F.; Ghalayini, T.; Abu Farha, N.; Kanan, S. The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts. Catalysts 2020, 10, 957. https://doi.org/10.3390/catal100909572073-4344http://hdl.handle.net/11073/2143810.3390/catal10090957en_UShttps://doi.org/10.3390/catal10090957oai:repository.aus.edu:11073/214382024-08-22T12:00:27Z |
| spellingShingle | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts Samara, Fatin TCDD Tetrachlorodibenzo-p-dioxin (TCDD) photodegradation ELISA catalyst Enzyme Linked Immunosorbent Assay (ELISA) Zeolite Mixed metal oxides |
| status_str | publishedVersion |
| title | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts |
| title_full | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts |
| title_fullStr | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts |
| title_full_unstemmed | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts |
| title_short | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts |
| title_sort | The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts |
| topic | TCDD Tetrachlorodibenzo-p-dioxin (TCDD) photodegradation ELISA catalyst Enzyme Linked Immunosorbent Assay (ELISA) Zeolite Mixed metal oxides |
| url | http://hdl.handle.net/11073/21438 |