Oxidative degradation of fensulfothion by hydroxyl radical in aqueous medium
[Display omitted] ► Degradation of fensulfothion by hydroxyl radicals from Advanced Oxidation Process. ► Complete transformation of fensulfothion, but with low TOC reduction. ► Presentation of 20 major products of transformation of fensulfothion. ► Presentation of the fast kinetics of reaction and o...
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| Veröffentlicht in: | Chemosphere (Oxford) 2013-04, Vol.91 (3), p.295-301 |
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| creator | Sunil Paul, M.M. Aravind, Usha K. Pramod, G. Aravindakumar, C.T. |
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► Degradation of fensulfothion by hydroxyl radicals from Advanced Oxidation Process. ► Complete transformation of fensulfothion, but with low TOC reduction. ► Presentation of 20 major products of transformation of fensulfothion. ► Presentation of the fast kinetics of reaction and of the absorption spectra of short lived intermediate radicals. ► Presentation of the mechanism of degradation induced by hydroxyl radicals.
Oxidative degradation of fensulfothion, a model organophosphorus compound, has been investigated by pulse radiolysis and H2O2/UV photolysis. A nearly complete transformation of fensulfothion was observed within 4min of irradiation. Very little Total Organic Carbon (TOC) reduction was obtained at this time scale. When the product studies at this stage were conducted using LC–MS/MS analyses, nearly 20 transformation products were obtained. The entire products were identified as from the reaction of OH with fensulfothion or with some of its initially transformed products. Nearly 80% reduction in TOC was observed when photolysis was conducted using higher concentrations of H2O2 at longer time scale. A reaction rate constant (bimolecular) of 1.10×1010dm3mol−1s−1 was obtained for the reaction of OH with fensulfothion using pulse radiolysis technique. The transient absorption spectrum obtained from the reaction of OH has a maximum at 280nm and a weak, broad maximum around 500nm along with a small shoulder around 340nm. The intermediate spectrum is assigned to the radical cation of fensulfothion (3) and the hydroxyl radical adducts (1 and 2). This assignment is supported by the intermediate spectrum (λmax at 280nm) from the reaction of sulfate radical anion (SO4-) (k2=3.20×109dm3mol−1s−1) which is a one electron oxidant. It is thus demonstrated that the combination of both pulse radiolysis and the product estimation using LC–MS/MS is ideal in probing the complete mechanism which is very important in the mineralization reactions using Advanced Oxidation Processes. |
| doi_str_mv | 10.1016/j.chemosphere.2012.11.033 |
| format | Article |
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► Degradation of fensulfothion by hydroxyl radicals from Advanced Oxidation Process. ► Complete transformation of fensulfothion, but with low TOC reduction. ► Presentation of 20 major products of transformation of fensulfothion. ► Presentation of the fast kinetics of reaction and of the absorption spectra of short lived intermediate radicals. ► Presentation of the mechanism of degradation induced by hydroxyl radicals.
Oxidative degradation of fensulfothion, a model organophosphorus compound, has been investigated by pulse radiolysis and H2O2/UV photolysis. A nearly complete transformation of fensulfothion was observed within 4min of irradiation. Very little Total Organic Carbon (TOC) reduction was obtained at this time scale. When the product studies at this stage were conducted using LC–MS/MS analyses, nearly 20 transformation products were obtained. The entire products were identified as from the reaction of OH with fensulfothion or with some of its initially transformed products. Nearly 80% reduction in TOC was observed when photolysis was conducted using higher concentrations of H2O2 at longer time scale. A reaction rate constant (bimolecular) of 1.10×1010dm3mol−1s−1 was obtained for the reaction of OH with fensulfothion using pulse radiolysis technique. The transient absorption spectrum obtained from the reaction of OH has a maximum at 280nm and a weak, broad maximum around 500nm along with a small shoulder around 340nm. The intermediate spectrum is assigned to the radical cation of fensulfothion (3) and the hydroxyl radical adducts (1 and 2). This assignment is supported by the intermediate spectrum (λmax at 280nm) from the reaction of sulfate radical anion (SO4-) (k2=3.20×109dm3mol−1s−1) which is a one electron oxidant. It is thus demonstrated that the combination of both pulse radiolysis and the product estimation using LC–MS/MS is ideal in probing the complete mechanism which is very important in the mineralization reactions using Advanced Oxidation Processes.</description><identifier>ISSN: 0045-6535</identifier><identifier>EISSN: 1879-1298</identifier><identifier>DOI: 10.1016/j.chemosphere.2012.11.033</identifier><identifier>PMID: 23273737</identifier><identifier>CODEN: CMSHAF</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Analytical chemistry ; Applied sciences ; Chemistry ; Chromatographic methods and physical methods associated with chromatography ; Drinking water and swimming-pool water. Desalination ; Exact sciences and technology ; Fensulfothion ; Hydrogen-Ion Concentration ; Hydroxyl radical ; Hydroxyl Radical - chemistry ; Kinetics ; Mass spectrometry ; Models, Chemical ; Organothiophosphorus Compounds - chemistry ; Other chromatographic methods ; Oxidation-Reduction ; Photodegradation ; Photolysis ; Pollution ; Pulse radiolysis ; Total organic carbon ; Water Pollutants, Chemical - analysis ; Water Pollutants, Chemical - chemistry ; Water treatment and pollution</subject><ispartof>Chemosphere (Oxford), 2013-04, Vol.91 (3), p.295-301</ispartof><rights>2012 Elsevier Ltd</rights><rights>2014 INIST-CNRS</rights><rights>Copyright © 2012 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c407t-782b2665d64653fbaafc4817e3bb7131fc2701072c9ac2a380453401f358a0053</citedby><cites>FETCH-LOGICAL-c407t-782b2665d64653fbaafc4817e3bb7131fc2701072c9ac2a380453401f358a0053</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.chemosphere.2012.11.033$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27162387$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23273737$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sunil Paul, M.M.</creatorcontrib><creatorcontrib>Aravind, Usha K.</creatorcontrib><creatorcontrib>Pramod, G.</creatorcontrib><creatorcontrib>Aravindakumar, C.T.</creatorcontrib><title>Oxidative degradation of fensulfothion by hydroxyl radical in aqueous medium</title><title>Chemosphere (Oxford)</title><addtitle>Chemosphere</addtitle><description>[Display omitted]
► Degradation of fensulfothion by hydroxyl radicals from Advanced Oxidation Process. ► Complete transformation of fensulfothion, but with low TOC reduction. ► Presentation of 20 major products of transformation of fensulfothion. ► Presentation of the fast kinetics of reaction and of the absorption spectra of short lived intermediate radicals. ► Presentation of the mechanism of degradation induced by hydroxyl radicals.
Oxidative degradation of fensulfothion, a model organophosphorus compound, has been investigated by pulse radiolysis and H2O2/UV photolysis. A nearly complete transformation of fensulfothion was observed within 4min of irradiation. Very little Total Organic Carbon (TOC) reduction was obtained at this time scale. When the product studies at this stage were conducted using LC–MS/MS analyses, nearly 20 transformation products were obtained. The entire products were identified as from the reaction of OH with fensulfothion or with some of its initially transformed products. Nearly 80% reduction in TOC was observed when photolysis was conducted using higher concentrations of H2O2 at longer time scale. A reaction rate constant (bimolecular) of 1.10×1010dm3mol−1s−1 was obtained for the reaction of OH with fensulfothion using pulse radiolysis technique. The transient absorption spectrum obtained from the reaction of OH has a maximum at 280nm and a weak, broad maximum around 500nm along with a small shoulder around 340nm. The intermediate spectrum is assigned to the radical cation of fensulfothion (3) and the hydroxyl radical adducts (1 and 2). This assignment is supported by the intermediate spectrum (λmax at 280nm) from the reaction of sulfate radical anion (SO4-) (k2=3.20×109dm3mol−1s−1) which is a one electron oxidant. It is thus demonstrated that the combination of both pulse radiolysis and the product estimation using LC–MS/MS is ideal in probing the complete mechanism which is very important in the mineralization reactions using Advanced Oxidation Processes.</description><subject>Analytical chemistry</subject><subject>Applied sciences</subject><subject>Chemistry</subject><subject>Chromatographic methods and physical methods associated with chromatography</subject><subject>Drinking water and swimming-pool water. Desalination</subject><subject>Exact sciences and technology</subject><subject>Fensulfothion</subject><subject>Hydrogen-Ion Concentration</subject><subject>Hydroxyl radical</subject><subject>Hydroxyl Radical - chemistry</subject><subject>Kinetics</subject><subject>Mass spectrometry</subject><subject>Models, Chemical</subject><subject>Organothiophosphorus Compounds - chemistry</subject><subject>Other chromatographic methods</subject><subject>Oxidation-Reduction</subject><subject>Photodegradation</subject><subject>Photolysis</subject><subject>Pollution</subject><subject>Pulse radiolysis</subject><subject>Total organic carbon</subject><subject>Water Pollutants, Chemical - analysis</subject><subject>Water Pollutants, Chemical - chemistry</subject><subject>Water treatment and pollution</subject><issn>0045-6535</issn><issn>1879-1298</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkMtOwzAQRS0EoqXwCygskNgkeOwkTpao4iVV6gbWluPY1FUSFzup2r_HUctjibywZZ2ZuXMQugGcAIb8fp3IlWqt36yUUwnBQBKABFN6gqZQsDIGUhanaIpxmsV5RrMJuvB-jXEozspzNCGUMBrOFC2WO1OL3mxVVKsPJ8a37SKrI606PzTa9qvxo9pHq33t7G7fRIEyUjSR6SLxOSg7-KhVtRnaS3SmRePV1fGeofenx7f5S7xYPr_OHxaxTDHrY1aQiuR5VudpCKcrIbRMC2CKVhUDCloShgEzIkshiaBFWIOmGDTNCoFxRmfo7tB342wI4HveGi9V04huTMNDD5ZiQtMioOUBlc5675TmG2da4fYcMB9l8jX_I5OPMjkADzJD7fVxzFCFBX8qv-0F4PYICB-EaCc6afwvxyAntBi5-YFTQcrWKMe9NKqTQZpTsue1Nf-I8wXdC5hM</recordid><startdate>20130401</startdate><enddate>20130401</enddate><creator>Sunil Paul, M.M.</creator><creator>Aravind, Usha K.</creator><creator>Pramod, G.</creator><creator>Aravindakumar, C.T.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20130401</creationdate><title>Oxidative degradation of fensulfothion by hydroxyl radical in aqueous medium</title><author>Sunil Paul, M.M. ; Aravind, Usha K. ; Pramod, G. ; Aravindakumar, C.T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c407t-782b2665d64653fbaafc4817e3bb7131fc2701072c9ac2a380453401f358a0053</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Analytical chemistry</topic><topic>Applied sciences</topic><topic>Chemistry</topic><topic>Chromatographic methods and physical methods associated with chromatography</topic><topic>Drinking water and swimming-pool water. Desalination</topic><topic>Exact sciences and technology</topic><topic>Fensulfothion</topic><topic>Hydrogen-Ion Concentration</topic><topic>Hydroxyl radical</topic><topic>Hydroxyl Radical - chemistry</topic><topic>Kinetics</topic><topic>Mass spectrometry</topic><topic>Models, Chemical</topic><topic>Organothiophosphorus Compounds - chemistry</topic><topic>Other chromatographic methods</topic><topic>Oxidation-Reduction</topic><topic>Photodegradation</topic><topic>Photolysis</topic><topic>Pollution</topic><topic>Pulse radiolysis</topic><topic>Total organic carbon</topic><topic>Water Pollutants, Chemical - analysis</topic><topic>Water Pollutants, Chemical - chemistry</topic><topic>Water treatment and pollution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sunil Paul, M.M.</creatorcontrib><creatorcontrib>Aravind, Usha K.</creatorcontrib><creatorcontrib>Pramod, G.</creatorcontrib><creatorcontrib>Aravindakumar, C.T.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Chemosphere (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sunil Paul, M.M.</au><au>Aravind, Usha K.</au><au>Pramod, G.</au><au>Aravindakumar, C.T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Oxidative degradation of fensulfothion by hydroxyl radical in aqueous medium</atitle><jtitle>Chemosphere (Oxford)</jtitle><addtitle>Chemosphere</addtitle><date>2013-04-01</date><risdate>2013</risdate><volume>91</volume><issue>3</issue><spage>295</spage><epage>301</epage><pages>295-301</pages><issn>0045-6535</issn><eissn>1879-1298</eissn><coden>CMSHAF</coden><abstract>[Display omitted]
► Degradation of fensulfothion by hydroxyl radicals from Advanced Oxidation Process. ► Complete transformation of fensulfothion, but with low TOC reduction. ► Presentation of 20 major products of transformation of fensulfothion. ► Presentation of the fast kinetics of reaction and of the absorption spectra of short lived intermediate radicals. ► Presentation of the mechanism of degradation induced by hydroxyl radicals.
Oxidative degradation of fensulfothion, a model organophosphorus compound, has been investigated by pulse radiolysis and H2O2/UV photolysis. A nearly complete transformation of fensulfothion was observed within 4min of irradiation. Very little Total Organic Carbon (TOC) reduction was obtained at this time scale. When the product studies at this stage were conducted using LC–MS/MS analyses, nearly 20 transformation products were obtained. The entire products were identified as from the reaction of OH with fensulfothion or with some of its initially transformed products. Nearly 80% reduction in TOC was observed when photolysis was conducted using higher concentrations of H2O2 at longer time scale. A reaction rate constant (bimolecular) of 1.10×1010dm3mol−1s−1 was obtained for the reaction of OH with fensulfothion using pulse radiolysis technique. The transient absorption spectrum obtained from the reaction of OH has a maximum at 280nm and a weak, broad maximum around 500nm along with a small shoulder around 340nm. The intermediate spectrum is assigned to the radical cation of fensulfothion (3) and the hydroxyl radical adducts (1 and 2). This assignment is supported by the intermediate spectrum (λmax at 280nm) from the reaction of sulfate radical anion (SO4-) (k2=3.20×109dm3mol−1s−1) which is a one electron oxidant. It is thus demonstrated that the combination of both pulse radiolysis and the product estimation using LC–MS/MS is ideal in probing the complete mechanism which is very important in the mineralization reactions using Advanced Oxidation Processes.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><pmid>23273737</pmid><doi>10.1016/j.chemosphere.2012.11.033</doi><tpages>7</tpages></addata></record> |
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| subjects | Analytical chemistry Applied sciences Chemistry Chromatographic methods and physical methods associated with chromatography Drinking water and swimming-pool water. Desalination Exact sciences and technology Fensulfothion Hydrogen-Ion Concentration Hydroxyl radical Hydroxyl Radical - chemistry Kinetics Mass spectrometry Models, Chemical Organothiophosphorus Compounds - chemistry Other chromatographic methods Oxidation-Reduction Photodegradation Photolysis Pollution Pulse radiolysis Total organic carbon Water Pollutants, Chemical - analysis Water Pollutants, Chemical - chemistry Water treatment and pollution |
| title | Oxidative degradation of fensulfothion by hydroxyl radical in aqueous medium |
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