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Title: Enhancement of shear flocculation of a galena suspension by ultrasonic treatment
Authors: Esmeli, K.
Ozkan, A.
Keywords: contact angle
shear flocculation
ultrasonic treatment
zeta potential
Contact angle
Ostwald ripening
Shear flow
Surface active agents
Suspensions (fluids)
Ultrasonic equipment
Alkaline conditions
Flocculation efficiency
Hydrophobic interactions
Potassium ethyl xanthate
Power levels
Shear flocculation
Surfactant concentrations
Ultrasonic treatments
Ultrasound power
Zeta potential
Publisher: South African Institute of Mining and Metallurgy
Abstract: The enhancement of shear flocculation of a galena suspension by ultrasound in the presence of sodium isopropyl xanthate and potassium ethyl xanthate was investigated by studying the effects of surfactant concentration on flocculation efficiency, contact angle, and zeta potential. Strong flocculation was obtained under alkaline conditions (pH > 9) and a high ultrasound power level (150 W). Although the ultrasonic treatment increased the negativity of the zeta potential of the galena particles, this did not decrease the flocculation efficiency, thereby showing that the hydrophobic interactions between the particle were stronger than the electrical double-layer repulsion resulting from xanthate adsorption. The findings indicate that the ultrasonic treatment promoted the adsorption of surfactants onto the mineral surfaces. © 2023 South African Institute of Mining and Metallurgy. All rights reserved.
ISSN: 2225-6253
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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