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Treatment of disinfection byproduct precursors

Bond, T, Goslan, EH, Parsons, SA and Jefferson, B (2011) Treatment of disinfection byproduct precursors Environmental Technology, 32 (1). pp. 1-25.

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Formation of harmful disinfection by‐products (DBPs), of which trihalomethanes (THMs) and haloacetic acids (HAAs) are the major groups, can be controlled by removal of natural organic matter (NOM) before disinfection. In the literature, removal of precursors is variable, even with the same treatment. The treatment of DBP precursors and NOM was examined with the intention of outlining precursor removal strategies for various water types. Freundlich adsorption parameters and hydroxyl rate constants were collated from the literature to link treatability by activated carbon and advanced oxidation processes (AOPs), respectively, to physico‐chemical properties. Whereas hydroxyl rate constants did not correlate meaningfully with any property, a moderate correlation was found between Freundlich parameters and log KOW, indicating activated carbon will preferentially adsorb hydrophobic NOM. Humic components of NOM are effectively removed by coagulation, and, where they are the principal precursor source, coagulation may be sufficient to control DBPs. Where humic species remaining post‐coagulation retain significant DBP formation potential (DBPFP), activated carbon is deemed a suitable process selection. Anion exchange is an effective treatment for transphilic species, known for high carboxylic acid functionality, and consequently is recommended for carboxylic acid precursors. Amino acids have been linked to HAA formation and are important constituents of algal organic matter. Amino acids are predicted to be effectively removed by biotreatment and nanofiltration. Carbohydrates have been found to reach 50% of NOM in river waters. If the carbohydrates were to pose a barrier to successful DBP control, additional treatment stages such as nanofiltration are likely to be required to reduce their occurrence.

Item Type: Article
Subjects : Civil Engineering
Divisions : Surrey research (other units)
Authors :
Goslan, EH
Parsons, SA
Jefferson, B
Date : January 2011
DOI : 10.1080/09593330.2010.495138
Copyright Disclaimer : © 2011 Taylor & Francis
Uncontrolled Keywords : Disinfection by-products, Precursors, Water, Treatment
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:57
Last Modified : 25 Jan 2020 00:34

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