UV Photodegradation of Inorganic Chloramines
The ultraviolet (UV) photolysis of monochloramine (NH2Cl), dichloramine (NHCl2), and trichloramine (NCl3) in aqueous solution was investigated at wavelengths of 222, 254, and 282 nm. All three chloramines can be degraded by UV irradiation, and the quantum yields for these processes are wavelength-de...
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| Veröffentlicht in: | Environmental science & technology 2009-01, Vol.43 (1), p.60-65 |
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| creator | Li, Jing Blatchley III, Ernest R |
| description | The ultraviolet (UV) photolysis of monochloramine (NH2Cl), dichloramine (NHCl2), and trichloramine (NCl3) in aqueous solution was investigated at wavelengths of 222, 254, and 282 nm. All three chloramines can be degraded by UV irradiation, and the quantum yields for these processes are wavelength-dependent. Stable photoproducts include nitrite, nitrate, nitrous oxide, and ammonium. Solution pH was observed to have little effect on the rate of photodecay; however, the product distribution showed strong pH dependence. Nitrate formation was favored at low pH, while nitrite formation was favored at high pH. The effects of pH on formation of N2O and NH4 + were less clear. On the basis of the results, a mechanism of photodecay of monochloramine is proposed. |
| doi_str_mv | 10.1021/es8016304 |
| format | Article |
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All three chloramines can be degraded by UV irradiation, and the quantum yields for these processes are wavelength-dependent. Stable photoproducts include nitrite, nitrate, nitrous oxide, and ammonium. Solution pH was observed to have little effect on the rate of photodecay; however, the product distribution showed strong pH dependence. Nitrate formation was favored at low pH, while nitrite formation was favored at high pH. The effects of pH on formation of N2O and NH4 + were less clear. On the basis of the results, a mechanism of photodecay of monochloramine is proposed.</description><identifier>ISSN: 0013-936X</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/es8016304</identifier><identifier>PMID: 19209585</identifier><identifier>CODEN: ESTHAG</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Absorption - radiation effects ; Applied sciences ; Aqueous chemistry ; Aqueous solutions ; Chemical compounds ; Chloramines - chemistry ; Chloramines - radiation effects ; Environmental Processes ; Exact sciences and technology ; Photolysis - radiation effects ; Pollution ; Solutions ; Spectrum Analysis ; Ultraviolet radiation ; Ultraviolet Rays</subject><ispartof>Environmental science & technology, 2009-01, Vol.43 (1), p.60-65</ispartof><rights>Copyright © 2009 American Chemical Society</rights><rights>2009 INIST-CNRS</rights><rights>Copyright American Chemical Society Jan 1, 2009</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a402t-f9892a3e9bf5c5a15f4f4e80a5b0f442d80a6d258e98b1013f274d7d42e8c2a33</citedby><cites>FETCH-LOGICAL-a402t-f9892a3e9bf5c5a15f4f4e80a5b0f442d80a6d258e98b1013f274d7d42e8c2a33</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/es8016304$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/es8016304$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,2752,27053,27901,27902,56713,56763</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21002621$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19209585$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Li, Jing</creatorcontrib><creatorcontrib>Blatchley III, Ernest R</creatorcontrib><title>UV Photodegradation of Inorganic Chloramines</title><title>Environmental science & technology</title><addtitle>Environ. Sci. Technol</addtitle><description>The ultraviolet (UV) photolysis of monochloramine (NH2Cl), dichloramine (NHCl2), and trichloramine (NCl3) in aqueous solution was investigated at wavelengths of 222, 254, and 282 nm. All three chloramines can be degraded by UV irradiation, and the quantum yields for these processes are wavelength-dependent. Stable photoproducts include nitrite, nitrate, nitrous oxide, and ammonium. Solution pH was observed to have little effect on the rate of photodecay; however, the product distribution showed strong pH dependence. Nitrate formation was favored at low pH, while nitrite formation was favored at high pH. The effects of pH on formation of N2O and NH4 + were less clear. On the basis of the results, a mechanism of photodecay of monochloramine is proposed.</description><subject>Absorption - radiation effects</subject><subject>Applied sciences</subject><subject>Aqueous chemistry</subject><subject>Aqueous solutions</subject><subject>Chemical compounds</subject><subject>Chloramines - chemistry</subject><subject>Chloramines - radiation effects</subject><subject>Environmental Processes</subject><subject>Exact sciences and technology</subject><subject>Photolysis - radiation effects</subject><subject>Pollution</subject><subject>Solutions</subject><subject>Spectrum Analysis</subject><subject>Ultraviolet radiation</subject><subject>Ultraviolet Rays</subject><issn>0013-936X</issn><issn>1520-5851</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp90U9LwzAYBvAgipvTg19AiqAiWH2TJm1ylOGfwUAPTryVNE22jq7RpD347c1Y2UDBU3L45cmbJwidYrjFQPCd9hxwmgDdQ0PMCMSMM7yPhgA4iUWSfgzQkfdLACAJ8EM0wIKACGiIbmbv0evCtrbUcydL2Va2iayJJo11c9lUKhovauvkqmq0P0YHRtZen_TrCM0eH97Gz_H05Wkyvp_GkgJpYyO4IDLRojBMMYmZoYZqDpIVYCglZdimJWFcC17gMKMhGS2zkhLNVTiYjNDVJvfT2a9O-zZfVV7pupaNtp3PBeaQZCxdy8t_ZZoGi7MswPNfcGk714RX5KGTUJog67TrDVLOeu-0yT9dtZLuO8eQr5vOt00He9YHdsVKlzvZVxvARQ-kV7I2Tjaq8ltHcPiNlOCdk8rvhvp74Q8vJI4r</recordid><startdate>20090101</startdate><enddate>20090101</enddate><creator>Li, Jing</creator><creator>Blatchley III, Ernest R</creator><general>American Chemical Society</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>7QO</scope><scope>7ST</scope><scope>7T7</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>SOI</scope><scope>7X8</scope></search><sort><creationdate>20090101</creationdate><title>UV Photodegradation of Inorganic Chloramines</title><author>Li, Jing ; Blatchley III, Ernest R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a402t-f9892a3e9bf5c5a15f4f4e80a5b0f442d80a6d258e98b1013f274d7d42e8c2a33</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Absorption - radiation effects</topic><topic>Applied sciences</topic><topic>Aqueous chemistry</topic><topic>Aqueous solutions</topic><topic>Chemical compounds</topic><topic>Chloramines - chemistry</topic><topic>Chloramines - radiation effects</topic><topic>Environmental Processes</topic><topic>Exact sciences and technology</topic><topic>Photolysis - radiation effects</topic><topic>Pollution</topic><topic>Solutions</topic><topic>Spectrum Analysis</topic><topic>Ultraviolet radiation</topic><topic>Ultraviolet Rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Jing</creatorcontrib><creatorcontrib>Blatchley III, Ernest R</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>Biotechnology Research Abstracts</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Environmental science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Jing</au><au>Blatchley III, Ernest R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>UV Photodegradation of Inorganic Chloramines</atitle><jtitle>Environmental science & technology</jtitle><addtitle>Environ. 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On the basis of the results, a mechanism of photodecay of monochloramine is proposed.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>19209585</pmid><doi>10.1021/es8016304</doi><tpages>6</tpages></addata></record> |
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| source | ACS Publications; MEDLINE |
| subjects | Absorption - radiation effects Applied sciences Aqueous chemistry Aqueous solutions Chemical compounds Chloramines - chemistry Chloramines - radiation effects Environmental Processes Exact sciences and technology Photolysis - radiation effects Pollution Solutions Spectrum Analysis Ultraviolet radiation Ultraviolet Rays |
| title | UV Photodegradation of Inorganic Chloramines |
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