Coated Ion-Exchange Resin Repels Algae

  • Author: ChemistryViews.org
  • Published: 23 November 2018
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: ACS Applied Materials & Interfaces/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Coated Ion-Exchange Resin Repels Algae

Ion-exchange resins are functionalized polymers that remove anions or cations from water and replace them with protons or hydroxide ions. They are used to soften and/or purify water. However, raw water often contains algal cells. These algae can foul the ion-exchange resin, lessen its performance, and decrease its lifetime.


Joseph B. Schlenoff and colleagues, The Florida State University, Tallahassee, USA, have developed an antifouling coating for ion-exchange resins, based on negatively charged or zwitterionic polymers. The team started with commercially available anion-exchange resins. They coated these resins using solutions of either pure poly(4-styrenesulfonate) (PSS, a negatively charged polymer) or a co-polymer of PSS and a polymer with zwitterionic groups, poly(3-[2-(acrylamido)ethyldimethylammonio]propanesulfonate) (PAEDAPS).


The uncoated ion-exchange resins were quickly fouled by Chlamydomonas reinhardtii algae cells which were passed through the material. In contrast, both polymers, PSS and PSS-co-PAEDAPS, give the resins antifouling properties. The coatings have no significant impact on the ion-exchanger's performance. The researchers attribute the effect to the overall negative surface charge of the coating, which prevents the attachment of algal cells to the resin. The positive charges that dominate in the uncoated resin, in contrast, interact strongly with organic matter and promote adhesion.


 

Article Views: 1204

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH