Arsenic oxidation by UV radiation combined with hydrogen peroxide
Arsenic is a widespread contaminant in the environment around the world. The most abundant species of arsenic in groundwater are arsenite [As(III)] and arsenate [As(V)]. Several arsenic removal processes can reach good removal yields only if arsenic is present as As(V). For this reason it is often n...
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| Veröffentlicht in: | Water science and technology 2010, Vol.61 (2), p.339-344 |
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| creator | Sorlini, S Gialdini, F Stefan, M |
| description | Arsenic is a widespread contaminant in the environment around the world. The most abundant species of arsenic in groundwater are arsenite [As(III)] and arsenate [As(V)]. Several arsenic removal processes can reach good removal yields only if arsenic is present as As(V). For this reason it is often necessary to proceed with a preliminary oxidation of As(III) to As(V) prior to the removal technology. Several studies have focused on arsenic oxidation with conventional reagents and advanced oxidation processes. In the present study the arsenic oxidation was evaluated using hydrogen peroxide, UV radiation and their combination in distilled and in real groundwater samples. Hydrogen peroxide and UV radiation alone are not effective at the arsenic oxidation. Good arsenic oxidation yields can be reached in presence of hydrogen peroxide combined with a high UV radiation dose (2,000 mJ/cm(2)). The quantum efficiencies for As(III) oxidation were calculated for both the UV photolysis and the UV/H(2)O(2) processes. |
| doi_str_mv | 10.2166/wst.2010.799 |
| format | Article |
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The most abundant species of arsenic in groundwater are arsenite [As(III)] and arsenate [As(V)]. Several arsenic removal processes can reach good removal yields only if arsenic is present as As(V). For this reason it is often necessary to proceed with a preliminary oxidation of As(III) to As(V) prior to the removal technology. Several studies have focused on arsenic oxidation with conventional reagents and advanced oxidation processes. In the present study the arsenic oxidation was evaluated using hydrogen peroxide, UV radiation and their combination in distilled and in real groundwater samples. Hydrogen peroxide and UV radiation alone are not effective at the arsenic oxidation. Good arsenic oxidation yields can be reached in presence of hydrogen peroxide combined with a high UV radiation dose (2,000 mJ/cm(2)). The quantum efficiencies for As(III) oxidation were calculated for both the UV photolysis and the UV/H(2)O(2) processes.</description><identifier>ISSN: 0273-1223</identifier><identifier>EISSN: 1996-9732</identifier><identifier>DOI: 10.2166/wst.2010.799</identifier><identifier>PMID: 20107260</identifier><language>eng</language><publisher>England: IWA Publishing</publisher><subject>Arsenates ; Arsenic ; Arsenic - chemistry ; Arsenic removal ; Contaminants ; Groundwater ; Hydrogen ; Hydrogen peroxide ; Hydrogen Peroxide - chemistry ; Oxidation ; Oxidation-Reduction ; Photolysis ; Pollutant removal ; Radiation dosage ; Reagents ; Ultraviolet radiation ; Ultraviolet Rays ; Water analysis ; Water Purification - methods ; Water sampling</subject><ispartof>Water science and technology, 2010, Vol.61 (2), p.339-344</ispartof><rights>Copyright IWA Publishing Jan 2010</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c350t-512ec1df7188f8383d513e49291920537dcfc93a4b20db6b7690a4fc1bfd3d813</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,4010,27904,27905,27906</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/20107260$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sorlini, S</creatorcontrib><creatorcontrib>Gialdini, F</creatorcontrib><creatorcontrib>Stefan, M</creatorcontrib><title>Arsenic oxidation by UV radiation combined with hydrogen peroxide</title><title>Water science and technology</title><addtitle>Water Sci Technol</addtitle><description>Arsenic is a widespread contaminant in the environment around the world. The most abundant species of arsenic in groundwater are arsenite [As(III)] and arsenate [As(V)]. Several arsenic removal processes can reach good removal yields only if arsenic is present as As(V). For this reason it is often necessary to proceed with a preliminary oxidation of As(III) to As(V) prior to the removal technology. Several studies have focused on arsenic oxidation with conventional reagents and advanced oxidation processes. In the present study the arsenic oxidation was evaluated using hydrogen peroxide, UV radiation and their combination in distilled and in real groundwater samples. Hydrogen peroxide and UV radiation alone are not effective at the arsenic oxidation. Good arsenic oxidation yields can be reached in presence of hydrogen peroxide combined with a high UV radiation dose (2,000 mJ/cm(2)). 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The most abundant species of arsenic in groundwater are arsenite [As(III)] and arsenate [As(V)]. Several arsenic removal processes can reach good removal yields only if arsenic is present as As(V). For this reason it is often necessary to proceed with a preliminary oxidation of As(III) to As(V) prior to the removal technology. Several studies have focused on arsenic oxidation with conventional reagents and advanced oxidation processes. In the present study the arsenic oxidation was evaluated using hydrogen peroxide, UV radiation and their combination in distilled and in real groundwater samples. Hydrogen peroxide and UV radiation alone are not effective at the arsenic oxidation. Good arsenic oxidation yields can be reached in presence of hydrogen peroxide combined with a high UV radiation dose (2,000 mJ/cm(2)). The quantum efficiencies for As(III) oxidation were calculated for both the UV photolysis and the UV/H(2)O(2) processes.</abstract><cop>England</cop><pub>IWA Publishing</pub><pmid>20107260</pmid><doi>10.2166/wst.2010.799</doi><tpages>6</tpages></addata></record> |
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| subjects | Arsenates Arsenic Arsenic - chemistry Arsenic removal Contaminants Groundwater Hydrogen Hydrogen peroxide Hydrogen Peroxide - chemistry Oxidation Oxidation-Reduction Photolysis Pollutant removal Radiation dosage Reagents Ultraviolet radiation Ultraviolet Rays Water analysis Water Purification - methods Water sampling |
| title | Arsenic oxidation by UV radiation combined with hydrogen peroxide |
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