Exploring HAA formation pathways during chloramination
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Exploring HAA formation pathways during chloramination

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Published by Awwa Research Foundation, American Water Works Association, IWA Publishing in Denver, Colo, [s.l.] .
Written in English

Subjects:

  • Water -- Purification -- Chloramination -- By-products,
  • Halocarbons

Book details:

Edition Notes

Statementprepared by Tanju Karanfil ... [et al.] ; sponsored by Awwa Research Foundation.
ContributionsKaranfil, Tanju., AWWA Research Foundation.
Classifications
LC ClassificationsTD462 .E97 2007
The Physical Object
Paginationxxiii, 123 p. :
Number of Pages123
ID Numbers
Open LibraryOL23697893M
ISBN 10158321576X
ISBN 109781583215760
LC Control Number2009277693

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Develops a fundamental understanding and a semi-mechanistic model for formation of dihalogenated acetic acids during chloramination. Published in Exploring HAA Formation Pathways During Chloramination | The Water Research Foundation. Exploring HAA Formation Pathways During Chloramination © Awwa Research Foundation. Reprinted with permission. It was reported that NHBrCl reacted with N, N-Diethyl-p-phenylenediamine (DPD) rapidly at pH , suggesting that the bromine atom of bromochloramine is very labile and reactive (Valentine, ).Cited by: During chloramination, HAcAms formation followed the same pattern in all the amide samples; In pH 7, yields decreased whereas in pH 8 increased with time. During chloramination in brominated samples, the most reactive amides were acetamide (pH 7 - 4 h) and β-alaninamide (pH 8–24 h) yielding and % M/M, respectively (Fig. 2b).Cited by: 1. The objective of this study was to investigate the roles of dissolved organic matter (DOM) fractions, pH and bromide concentration in the formation of haloacetic acids (HAA) during chloramination.

Abstract The literature reports significantly different patterns for haloacetic acid (HAA) formation kinetics during chloramination. This study systematically examines the routes of HAA formation. DBP Formation During Chloramination. HAA formation is more problematic during chloramination than THM formation. was demonstrated to . The primary reasons for using chloramines rather than chlorine are: greater persistence of chlorine residual in distribution; reduction in THM and HAA formation; superior control of biofilm growth (aftergrowth of bacteria or low forms of animal life) in the distribution system; and the possibility of higher doses (about mg/l) with less risk. 7. To use the information from the study to predict the potential formation of HAA compounds in the UK in general, and their health impact on the UK population. 3. Analytical Methods Samples were analysed for 9 haloacetic acids (HAA9) according to the standard EPA method (USEPA ).

Halonitromethane formation potentials in drinking waters. They also reported that the TCNM yields averaged 2 nM/mg DOC during chlorination and chloramination. In this study, the HNM yields of NOM fractions were and nM/mg DOC for chlorination and chloramination, respectively. H. Song, O. OrrExploring HAA Formation Pathways During Cited by: Nitrosamine formation during chloramination previously has been linked to a reaction between monochloramine and organic nitrogen precursors via unsymmetrical dialkylhydrazine intermediates. Our results demonstrate the critical importance of dichloramine and dissolved oxygen. We propose a new nitrosamine formation pathway in which dichloramine reacts with secondary amine precursors to form Cited by: Moreover, the formation of IAL during chloramination of source water containing iodide was recently reported (Jeong et al., ) and it has not been further investigated. In this context, the present study aimed at further exploring the formation of I-DBPs, including I-THMs, iodo-haloacetic acids (I-HAAs), and IAL in chlorinated and Cited by: Nitrogenous disinfection byproducts formation and nitrogen origin exploration during chloramination of nitrogenous organic compounds Article (PDF Available) in Water Research 44(9)