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Electrochemical oxidation of represe...

Kim, Jaeshin.

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Electrochemical oxidation of representative inorganic and organic contaminants in an in situ electrochemical reactor.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Electrochemical oxidation of representative inorganic and organic contaminants in an in situ electrochemical reactor./
Author:	Kim, Jaeshin.
Description:	179 p.
Notes:	Adviser: Gregory V. Korshin.
Contained By:	Dissertation Abstracts International67-02B.
Subject:	Engineering, Environmental. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3207819
ISBN:	9780542560293

Electrochemical oxidation of representative inorganic and organic contaminants in an in situ electrochemical reactor.
Kim, Jaeshin.

Electrochemical oxidation of representative inorganic and organic contaminants in an in situ electrochemical reactor. - 179 p.

Adviser: Gregory V. Korshin.

Thesis (Ph.D.)--University of Washington, 2006.

The results of this research considerably improve the understanding of the mechanisms that govern the EC generation of reactive species and in situ environmental oxidations in EC reactors.

ISBN: 9780542560293Subjects--Topical Terms:

783782
Engineering, Environmental.

Electrochemical oxidation of representative inorganic and organic contaminants in an in situ electrochemical reactor.
LDR:03208nam 2200313 a 45 001 969369
005 20110920
008 110921s2006 eng d
020 $a 9780542560293
035 $a (UMI)AAI3207819
035 $a AAI3207819
040 $a UMI $c UMI
100 1 $a Kim, Jaeshin. $3 1293422
245 1 0 $a Electrochemical oxidation of representative inorganic and organic contaminants in an in situ electrochemical reactor.
300 $a 179 p.
500 $a Adviser: Gregory V. Korshin.
500 $a Source: Dissertation Abstracts International, Volume: 67-02, Section: B, page: 0782.
502 $a Thesis (Ph.D.)--University of Washington, 2006.
520 $a The results of this research considerably improve the understanding of the mechanisms that govern the EC generation of reactive species and in situ environmental oxidations in EC reactors.
520 $a This study was focused on the investigation of indirect electrochemical (EC) oxidation of selected environmentally important species (arsenite, phenol, nonylphenol and natural organic matter (NOM)) in an EC reactor equipped with a Co-PbO2 anode and a stainless steel cathode. The EC production of hydroxyl radicals was determined to be of fundamental importance for in situ EC oxidations. Ozone in such systems is apparently formed a result of interactions between EC-generated OH· radicals and molecular oxygen rather than via direct EC oxidation of water to O3. O 3 and OH· formation was quantified using indigotrisulfonate and p-chlorobenzoic acid (pCBA). The current yield of hydroxyl radicals (alpha OH·) increased from 0.1 to 0.5% as the current density was increased from 5 to 50 mA/cm2. The value of alpha OH· was not affected by variations of pH (range 5 to 9) and/or total carbonate concentration (range 0 to 2 mM). In addition to OH· and O3, free chlorine was generated by EC oxidation of chloride ion. The yield of EC-generated chlorine was strongly correlated with the Cl- concentration.
520 $a The pathways and kinetics of the EC oxidation of arsenite and phenolic compounds were examined. Arsenite was oxidized by several EC-produced oxidants, but phenol and nonylphenol were oxidized almost exclusively by hydroxyl radicals. The consumption of OH· radicals in the oxidation of the phenols caused the yields of ozone to decrease, due to the suppression of reactions between OR and dissolved oxygen. The EC oxidation of phenol and nonylphenol was partially reversible due to the formation of benzoquinone intermediates that could be reduced by cathodically generated species. The formation of such intermediates was not discernible for NOM. The EC oxidation of NOM was accompanied by the breakdown of the aromatic structures in NOM molecules and formation of low molecular weight aldehydes and carboxylic acids whose speciation was similar to that seen in the oxidation of nonylphenol.
590 $a School code: 0250.
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Engineering, Sanitary and Municipal. $3 1018731
650 4 $a Environmental Sciences. $3 676987
690 $a 0554
690 $a 0768
690 $a 0775
710 2 0 $a University of Washington. $3 545923
773 0 $t Dissertation Abstracts International $g 67-02B.
790 $a 0250
790 1 0 $a Korshin, Gregory V., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3207819