Amphiphilic polyelectrolytes as primary flocculants/coagulants in water treatment: Dynamic light scattering study

R. Alnaizy, M. Sayem Mozumder, B. F. Abu-Sharkh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

It is vital to reduce the concentration of natural organic matters (NOM) in groundwaters. Polymer-based coagulants such as amphiphilic polyelectrolytes are used in water treatment in two distinct ways, as coagulant aids and as primary coagulants. In the latter role, polymers have a number of advantages over inorganic coagulants, notably the smaller volume of sludge produced and reduced sludge management costs. This study examines the impact of molecular structure of novel amphiphilic polyelectrolytes on floe size and size distribution determined by dynamic light scattering. These parameters are related to hydrophobe contents and charge of the polyelectrolyte. These characteristics are also related to the removal efficiency of NOM. The results showed a much lower amount of polymer is needed when amphiphilic polyelectrolytes were used as primary coagulants/flocculants in treating groundwater contaminated with natural organic matters. This substantially lower polymer amount would result in a lower treatment cost as well as it would yield a much lower sludge volume. Dynamic light scattering and UV absorbance results confirmed an optimum polymer dose of 0.3 ppm with up to 5% hydrophobe contents. The polymer hydrophobe contents were directly related to the system performance and NOM removal efficiency. The pH of the solution was virtually unaffected.

Original languageEnglish
Title of host publicationProceedings of the 2004 World Water and Environmetal Resources Congress
Subtitle of host publicationCritical Transitions in Water and Environmental Resources Management
EditorsG. Sehlke, D.F. Hayes, D.K. Stevens
Pages2880-2890
Number of pages11
Publication statusPublished - Dec 1 2004
Externally publishedYes
Event2004 World Water and Environmental Resources Congress: Critical Transitions in Water and Environmental Resources Management - Salt Lake City, UT, United States
Duration: Jun 27 2004Jul 1 2004

Publication series

NameProceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management

Other

Other2004 World Water and Environmental Resources Congress: Critical Transitions in Water and Environmental Resources Management
Country/TerritoryUnited States
CitySalt Lake City, UT
Period6/27/047/1/04

ASJC Scopus subject areas

  • General Engineering

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