Synthesis of strongly cationic hydrophobic polyquaternium flocculants to enhance removal of water-soluble dyes in wastewater

Synthesis of strongly cationic hydrophobic polyquaternium flocculants to enhance removal of... A series of new hydrophobic and strongly cationic poly(dimethyldiallylammonium chloride)s (HC-PDMDAACs) were synthesized and used to enhance the removal of water-soluble dyes in dyeing wastewater. The water-soluble anionic dyes could be removed from the water phase by forming flocculation precipitations with strongly cationic units in the main chains of HC-PDMDAAC through electrostatic interactions, and suitable contents of hydrophobic groups of HC-PDMDAACs further reduced the water solubility of those precipitations, causing a shift in the interaction equilibrium to form more flocculation precipitations, thus achieving the purpose of improving dye removal. Job’s plotting methods were first used to establish the interaction equations of cationic units (C) in HC-PDMDAAC flocculants and anionic dyes (D) and to reveal the flocculation effect mechanisms of those polycationic structures. It was discovered that controlling the 6% molar contents of hydrophobic DADMAC units in the main chains of HC-PDMDAAC flocculants gave the most efficient combinations with anionic dyes, and the hydrophobic groups and high molecular weights of HC-PDMDAACs both played roles in improving the removal of anionic dyes. Moreover, HC-PDMDAAC flocculants had good application universally and could adapt to the different pH values of the application environment in the purification of dyeing wastewater. In addition, SEM analysis of the flocculation precipitations confirmed that they tended further to condense strongly into large clusters so as to remove anionic dyes from the water phase more easily. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Synthesis of strongly cationic hydrophobic polyquaternium flocculants to enhance removal of water-soluble dyes in wastewater

Loading next page...
 
/lp/springer_journal/synthesis-of-strongly-cationic-hydrophobic-polyquaternium-flocculants-YlbRjoRZ7q
Publisher
Springer Netherlands
Copyright
Copyright © 2016 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-016-2832-0
Publisher site
See Article on Publisher Site

Abstract

A series of new hydrophobic and strongly cationic poly(dimethyldiallylammonium chloride)s (HC-PDMDAACs) were synthesized and used to enhance the removal of water-soluble dyes in dyeing wastewater. The water-soluble anionic dyes could be removed from the water phase by forming flocculation precipitations with strongly cationic units in the main chains of HC-PDMDAAC through electrostatic interactions, and suitable contents of hydrophobic groups of HC-PDMDAACs further reduced the water solubility of those precipitations, causing a shift in the interaction equilibrium to form more flocculation precipitations, thus achieving the purpose of improving dye removal. Job’s plotting methods were first used to establish the interaction equations of cationic units (C) in HC-PDMDAAC flocculants and anionic dyes (D) and to reveal the flocculation effect mechanisms of those polycationic structures. It was discovered that controlling the 6% molar contents of hydrophobic DADMAC units in the main chains of HC-PDMDAAC flocculants gave the most efficient combinations with anionic dyes, and the hydrophobic groups and high molecular weights of HC-PDMDAACs both played roles in improving the removal of anionic dyes. Moreover, HC-PDMDAAC flocculants had good application universally and could adapt to the different pH values of the application environment in the purification of dyeing wastewater. In addition, SEM analysis of the flocculation precipitations confirmed that they tended further to condense strongly into large clusters so as to remove anionic dyes from the water phase more easily.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Dec 26, 2016

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches

$49/month

Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.

$588

$360/year

billed annually
Start Free Trial

14-day Free Trial