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Characterizing the properties and re...

Li, Chi-Wang.

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Characterizing the properties and reactions of natural organic matter by UV spectroscopy: Adsorption of NOM and formation of disinfection by-products.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Characterizing the properties and reactions of natural organic matter by UV spectroscopy: Adsorption of NOM and formation of disinfection by-products./
作者:	Li, Chi-Wang.
面頁冊數:	183 p.
附註:	Source: Dissertation Abstracts International, Volume: 59-06, Section: B, page: 2970.
Contained By:	Dissertation Abstracts International59-06B.
標題:	Engineering, Sanitary and Municipal. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9836206
ISBN:	9780591896800

Characterizing the properties and reactions of natural organic matter by UV spectroscopy: Adsorption of NOM and formation of disinfection by-products.
Li, Chi-Wang.

Characterizing the properties and reactions of natural organic matter by UV spectroscopy: Adsorption of NOM and formation of disinfection by-products. - 183 p.

Source: Dissertation Abstracts International, Volume: 59-06, Section: B, page: 2970.

Thesis (Ph.D.)--University of Washington, 1998.

UV spectra of NOM are modeled according to the three-Gauss-band model of Korshin et al. (1996). The model describes the evaluation of three composite adsorption bands in the NOM spectrum, labeled the LE, Bz, and ET bands. In this work, the ratio of the absorbance of the ET and Bz band (

ISBN: 9780591896800Subjects--Topical Terms:

1018731
Engineering, Sanitary and Municipal.

Characterizing the properties and reactions of natural organic matter by UV spectroscopy: Adsorption of NOM and formation of disinfection by-products.
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245 1 0 $a Characterizing the properties and reactions of natural organic matter by UV spectroscopy: Adsorption of NOM and formation of disinfection by-products.
300 $a 183 p.
500 $a Source: Dissertation Abstracts International, Volume: 59-06, Section: B, page: 2970.
500 $a Chairperson: Mark M. Benjamin.
502 $a Thesis (Ph.D.)--University of Washington, 1998.
520 $a UV spectra of NOM are modeled according to the three-Gauss-band model of Korshin et al. (1996). The model describes the evaluation of three composite adsorption bands in the NOM spectrum, labeled the LE, Bz, and ET bands. In this work, the ratio of the absorbance of the ET and Bz band ( $\ rm A\sb{ET}/A\sb{Bz} $) and the width of ET band (W $\ sb{\rm ET} $) were shown to be approximately proportional to the activated aromatic ring content in a set of fractionated NOM samples (as determined by $\ sp{13}
520 $a The change in the UV absorbance of NOM induced by chlorination can be characterized by the differential UV spectrum of the water. Differential UV spectra of chlorinated NOM are uniform for a wide range of water qualities and chlorination conditions, exhibiting a band with a maximum near a wavelength of 270 nm. The magnitude of $\ rm\Delta A\sb{272} $ is an excellent indicator of TOX formation resulting from chlorination, independent of Cl $\ sb2 $- to-DOC ratio, bromide concentration, pH, reaction time, and NOM source. The formation of THMs and HAAs is also very well correlated with $\ rm\Delta A\sb{272} $, but the correlation is pH-dependent and cannot be represented by a straight line through the origin. It appears that THM and HAA form only after a significant amount of reaction has occurred, and TOX has formed.
520 $a The chlorine incorporation efficiency is almost 100% immediately after chlorine is dosed into solution. As the reaction proceeds, increasing amounts of Cl are reduced to Cl $\ sp- $ rather than becoming incorporated into the molecule. The point where Cl incorporation efficiency declines dramatically coincides closely with the initial release of THMs.
520 $a A semi-quantitative conceptual model was developed to account for the relationships among TOX formation, $\ rm\Delta A\sb{272} $, and chlorine consumption observed in this study.
590 $a School code: 0250.
650 4 $a Engineering, Sanitary and Municipal. $3 1018731
650 4 $a Engineering, Environmental. $3 783782
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710 2 $a University of Washington. $3 545923
773 0 $t Dissertation Abstracts International $g 59-06B.
790 1 0 $a Benjamin, Mark M., $e advisor
790 $a 0250
791 $a Ph.D.
792 $a 1998
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9836206