The Separation of ink and pulp fibers in recycled paper is primarily achieved by flotation methods. Xerographic toners from photocopiers and laser printers are known to cause problems in flotation deinking. Wettability and froth stability are two important factors which determine the floatability of xerographic toners. The floatability is investigated for a selected toner using a cationic, a nonionic, and an anionic surfactant. At low surfactant concentrations the froth is too unstable to support flotation, whereas at high surfactant concentrations the toner is rendered hydrophilic by adsorbed surfactant molecules and does not stick to air bubbles. Consequently, a maximum in flotation response is found at an intermediate surfactant concentration near the critical micelle concentration. Cationic, nonionic, and anionic surfactants all adsorb with their hydrocarbon tails on the toner surface. By choosing appropriate froth-stabilizing additives it is possible to enhance the flotation performance.
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Baumgarten HL, Grossmann H, Weigl J (1988) Papier (Darmstadt) 42(10A):V166-V177
Ferguson LD (1991) Progr Paper Recycl 1(November): 17–23
Pfalzer L (1991) Wochenbl Papierfabr 119:183–190
Shrinath A, Szewczak JT, Bowen IJ (1991) Tappi J 74(7):85–93
Carr WF (1991) Tappi J 74(2):127–132
Pfalzer L (1979) Tappi J 62(7):27–30
Quick TH, Hodgson KT (1986) Tappi J 69(3):102–106
Jones WS (1992) Progr Paper Recycl 2(August):51–56
Snyder BA, Schmidt DC, Berg JC (1993) Progr Paper Recycl 3(November):17–26
Leja J (1982) Surface chemistry of froth flotation. Plenum Press, New York
Laskowski JS (ed) (1989) Frothing in flotation. Gordon and Breach, New York
Somasundaram P, Moudgil BM (eds) (1988) Reagents in mineral technology. Surfactant science series vol. 27, Marcel Dekker, New York
Epple M, Berg JC (1994) Progr Paper Recycl (accepted)
Berg JC (1986) In: Salmén L, de Ruvo A, Seferis JC, Stark EB (eds) Composite systems from natural and synthetic polymers, Elsevier, Amsterdam, pp 23–46
Fuerstenau DW, Metzger PH, Seele GD (1957) Eng Min J 158(3):93–95
Larsson A, Stenius P, Ödberg L (1984) Sven Papperstidn 87(18):R158-R164
Snyder BA, Berg JC (1993) Tappi J (accepted)
Fuerstenau DW, Healy TW, Somasundaran P (1964) Trans Am Inst Min Metall Pet Eng 229:321–325
Wakamatsu T, Fuerstenau DW (1968) Adv Chem Ser 79:161–172
Fuerstenau DW (1971) In: Hair ML (ed) The chemistry of biosurfaces, vol. 1, Marcel Dekker, New York, pp 143–176
Novich BE (1990) Colloids Surf. 46:255–269
van Os NM, Haak JR, Rupert LAM (1993) Physicochemical properties of selected anionic, cationic and nonionic surfactants. Elsevier, Amsterdam
Bikerman JJ (1973) Foams. Springer, New York Heidelberg Berlin
Rosen MJ (1978) Surfactants and interfacial phenomena. Wiley-Interscience, New York
Parfitt GD, Rochester CH (eds) (1983) Adsorption form solution at the solid/liquid interface. Academic Press, London
Connor P, Ottewill RH (1971) J Coll Interface Sci 37:642–651
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Epple, M., Schmidt, D.C. & Berg, J.C. The effect of froth stability and wettability on the flotation of a xerographic toner. Colloid Polym Sci 272, 1264–1272 (1994). https://doi.org/10.1007/BF00657780
- froth stability
- cooperative adsorption