Addressing water scarcity: Cationic polyelectrolytes in water treatment and purification

Emily M. Wilts, Jana Herzberger, Timothy Edward Long

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Synthetic cationic polyelectrolytes (CPEs) serve as coagulation and flocculation agents in wastewater treatment due to a synergy of inherent electrostatic interactions and hydrophilic properties. In wastewater treatment, CPEs act as coagulation and flocculation agents to aggregate impurities and enable water purification. New health and environmental-related regulations provide motivation for government agencies and industrial companies to reuse wastewater. Chemical structure, molecular weight, charge density and functionality of CPEs provide tailorability for specific purification needs. Cationic polyacrylamides, ammonium-based polymers, poly(allyldimethyl-ammonium chloride) and epichlorohydrin/dimethylamine-based polymers are the most common CPEs used as coagulation and flocculation agents because they are economical and water soluble with tunable charge densities at high molecular weights. Free radical polymerization, step-growth polymerization and post-polymerization modification methods afford each polymer system. This review highlights recent advancements in synthetic methods to yield CPEs, structure-property relationships as related to flocculation efficiency and a summary of their toxicity and environmental impact.

Original languageEnglish
JournalPolymer International
DOIs
Publication statusAccepted/In press - 2018 Jan 1
Externally publishedYes

Fingerprint

Polyelectrolytes
Water treatment
Purification
Flocculation
Coagulation
Water
Polymers
Charge density
Wastewater treatment
Molecular weight
Epichlorohydrin
Polymerization
Ammonium Chloride
Free radical polymerization
Coulomb interactions
Polyacrylates
Ammonium Compounds
Environmental impact
Toxicity
Wastewater

Keywords

  • Cationic polyelectrolytes
  • Coagulation
  • Flocculation
  • Wastewater treatment
  • Water purification

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Addressing water scarcity : Cationic polyelectrolytes in water treatment and purification. / Wilts, Emily M.; Herzberger, Jana; Long, Timothy Edward.

In: Polymer International, 01.01.2018.

Research output: Contribution to journalArticle

Wilts, Emily M. ; Herzberger, Jana ; Long, Timothy Edward. / Addressing water scarcity : Cationic polyelectrolytes in water treatment and purification. In: Polymer International. 2018.
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