Treatment of low turbidity water by sweep coagulation using bentonite | Zendy

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Treatment of low turbidity water by sweep coagulation using bentonite

Author(s) -

Shen YunHwei

Publication year - 2005

Publication title -

journal of chemical technology and biotechnology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.64

H-Index - 117

eISSN - 1097-4660

pISSN - 0268-2575

DOI - 10.1002/jctb.1244

Subject(s) - turbidity , bentonite , coagulation , dispersion (optics) , water treatment , chemistry , chemical engineering , turbidite , materials science , environmental engineering , environmental science , geology , optics , sedimentary rock , psychology , paleontology , oceanography , physics , psychiatry , engineering

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

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