Colloid-enhanced ultrafiltration in removal of traces amounts of borates from water.
The use of colloid-enhanced ultrafiltration for boron removal from water is investigated. Biodegradable surfactant, 1,4-sorbitol oleate, was applied to obtain micelles and high molecular weight chitosan to reinforce their stability. Two kind of membranes were compared: neat porous polysulfone membrane and charged porous sulfonated polysylfone membrane; both with similar average pore diameter of 5 nm. The studies revealed that two key factors affect the boron rejection: presence of surfactant in the colloidal mixture and a repulsion effect of sulfone groups on the membrane surface. Both have a positive effect on boron removal.
Bryjak
M
M
Division of Polymer and Carbonaceous Materials, Wroclaw University of Technology, 50-370 Wroclaw, Poland. marek.bryjak@pwr.wroc.pl
Duraj
I
I
Poźniak
G
G
D001881:Borates / Q000032:analysis / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry; D003102:Colloids / Q000737:chemistry*; D008823:Micelles; D014462:Ultrafiltration / Q000379:methods; D014873:Water Pollutants / Q000032:analysis / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D001881:Borates; D003102:Colloids; D008823:Micelles; D014873:Water Pollutants; D048271:Chitosan
Water Res. 2006 Mar;40(5):1027-33
16472838
Chemosphere. 2007 Jan;66(5):970-6
16884764