TY - JOUR
T1 - Colloidal titanium dioxide separation from water by foam flotation
AU - Shen, Yun Hwei
N1 - Funding Information:
This research was supported in part by the National Science Council of the Republic of China and Department of Environmental Protection, Kaohsiung Municipal Government, Republic of China.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1998
Y1 - 1998
N2 - Colloidal titanium dioxide (TiO2) was separated from an aqueous suspension (1000 ppm) by foam flotation using cationic or anionic surfactants. The effects of surfactant dosage, suspension pH value, suspension ionic strength, and gas flow rate on the dispersed-air flotation of colloidal TiO2 were investigated. TiO2 separation was almost complete in optimum conditions. It was found that the coulombic interaction between charged TiO2 particle surfaces and ionic collectors plays a dominant role in this system. Both flotation rate and foamate volume are dependent upon the gas flow rate. Foam flotation may find application in the separation of submicron TiO2 particles in suspend-photocatalyst systems.
AB - Colloidal titanium dioxide (TiO2) was separated from an aqueous suspension (1000 ppm) by foam flotation using cationic or anionic surfactants. The effects of surfactant dosage, suspension pH value, suspension ionic strength, and gas flow rate on the dispersed-air flotation of colloidal TiO2 were investigated. TiO2 separation was almost complete in optimum conditions. It was found that the coulombic interaction between charged TiO2 particle surfaces and ionic collectors plays a dominant role in this system. Both flotation rate and foamate volume are dependent upon the gas flow rate. Foam flotation may find application in the separation of submicron TiO2 particles in suspend-photocatalyst systems.
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U2 - 10.1080/01496399808545323
DO - 10.1080/01496399808545323
M3 - Article
AN - SCOPUS:0032464655
SN - 0149-6395
VL - 33
SP - 2623
EP - 2635
JO - Separation Science and Technology
JF - Separation Science and Technology
IS - 16
ER -