Treatment of low turbidity water by sweep coagulation using bentonite

✍ Scribed by Yun-Hwei Shen

• Book ID: 102314943
• Publisher: Wiley (John Wiley & Sons)
• Year: 2005
• Tongue: English
• Weight: 212 KB
• Volume: 80
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.1244

✦ Synopsis

Abstract

A novel strategy of sweep coagulation to treat low turbidity water is presented herein. Study findings demonstrated that an Na^+^‐saturated bentonite with medium cation exchange capacity (CEC) resulted in significant turbidity removal at a bentonite dosage of 30 mg dm^−3^. Bentonite dispersion with fully delaminated platelets tended to undergo a more porous type of coagulation with intense face‐to‐face interactions of platelets and effectively entrapped TiO~2~ particles in band‐type structures. This type of coagulation usually results in a large volume of settled flocs with a fluffy structure and excellent turbidity removal efficiency for sweep coagulation. The sign and magnitude of electrical charge on TiO~2~ particles has a minor effect on the efficiency of sweep coagulation. Copyright © 2005 Society of Chemical Industry