Flocculation of kaolinite suspensions in water by chitosan

Flocculation of kaolinite suspensions in water by chitosan

Flocculation of kaolinite suspensions in water using chitosan was studied in the pH range 5–9 and the turbidity ranging from 10 to 160 NTU. Chitosan, in presence of trace quantities of a substance present in aqueous soil extracts, effectively reduces turbidity due to kaolinite by flocculation and se...

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Veröffentlicht in:Water research (Oxford) 2001-11, Vol.35 (16), p.3904-3908
Hauptverfasser: Divakaran, Ravi, Sivasankara Pillai, V.N
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum Silicates
Applied sciences
Chelating Agents - chemistry
Chitin - analogs & derivatives
Chitin - chemistry
Chitosan
coagulation
Exact sciences and technology
Flocculation
Hydrogen-Ion Concentration
Industrial Waste
Industrial wastewaters
Kaolin - chemistry
kaolinite
Particle Size
Pollution
turbidity
Wastewaters
Water
Water Purification - methods
Water treatment and pollution
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Zusammenfassung:Flocculation of kaolinite suspensions in water using chitosan was studied in the pH range 5–9 and the turbidity ranging from 10 to 160 NTU. Chitosan, in presence of trace quantities of a substance present in aqueous soil extracts, effectively reduces turbidity due to kaolinite by flocculation and settling. Flocculation efficiency is very sensitive to pH, and reaches a maximum at pH 7.5. The optimal chitosan concentration required to effect flocculation is independent of kaolinite concentration within the range examined. Flocculation is faster at higher concentrations of kaolinite and the flocs are large and settle rapidly.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(01)00131-2