Identyfikatory
DOI
Warianty tytułu
Języki publikacji
Abstrakty
Hydrophobic particulates, i.e. bubbles, precipitates, and coal particles are shown to exhibit similar isoelectric point (iep) values in the presence of ionic surfactants. While coal in anionic surfactant solutions exhibits negative zeta potentials in the entire pH region, coal in cationic surfactant solutions undergoes a charge reversal in alkaline pH. Adsorption and zeta potential measurements together with previously published results indicate that ionic surfactants adsorb on coal through hydrophobic bonding driven by entropy. Physicochemical similarities in the adsorption mechanisms of ionic surfactants onto the bubbles, precipitates, and coal particles are proposed to be responsible for the observed iep values and also heterocoagulation phenomena.
Słowa kluczowe
Rocznik
Tom
Strony
124--130
Opis fizyczny
Bibliogr. 28 poz., rys., tab.
Twórcy
autor
- Istanbul Technical University, Mining Faculty, Mineral Processing Department, Ayazaga, 34469, Istanbul, Turkey
autor
- Istanbul University, Engineering Faculty, Mining Engineering Department, Avcilar, 34320, Istanbul, Turkey
Bibliografia
- ALEXANDROVA, L., PUGH, R.J., TIBERG, F., GRIGOROV, L., 1999. Confirmation of the heterocoagulation theory of flotation. Langmuir, 15, 7464-7471.
- ANANTHAPADMANABHAN, K.P., SOMASUNDARAN, P., 1985. Surface precipitation of inorganics and surfactants and its role in adsorption and flotation. Colloids and Surfaces, 13, 151-167.
- CASTRO, S.H., VURDELA, R.M., LASKOWSKI, J.S., 1986. The surface association and precipitation of surfactant species in alkaline dodecylamine hydrochloride solutions. Colloids and Surfaces, 21, 87-100.
- CELIK, M.S., 1989. Adsorption of ethoxylated sulfonate and nonionic homologs on coal. Journal of Colloid and Interface Science, 129(2), 428-440.
- CELIK, M.S., YOON, R.H., 1991. Adsorption of poly(oxyethylene)nonylphenol homologs on a low-ash coal. Langmuir, 7(8), 1770-1774.
- CELIK, M.S., YOON, R.H., 1993. Calorimetric studies on the interaction of ionic surfactants with coal. Proceedings of SME Annual Meeting, Preprint No. 93-250, Reno.
- CELIK, M.S., YASAR, E., EL-SHALL, H., 1998. Flotation of heterocoagulated particulates in ulexite/SDS/electrolyte system. Journal of Colloid and Interface Science, 203, 254-259.
- CHERNYSHOVA, I.V., HANUMANTHA RAO, K., VIDYADHAR, A., SHCHUKAREV, A.V., 2000. Mechanism of adsorption of long-chain alkylamines on silicates. a spectroscopic study. 1. Quartz, Langmuir, 16(21), 8071-8084.
- DERJAGUIN, B.V., DUKHIN, S.S., 1961. Theory of flotation of small and medium-size particles. Transactions of Institutions of Mining and Metallurgy, 70, 221-246.
- DIBBS, H.P., SIROIS, L.L., BREDIN, R., 1974. Some electrical properties of bubbles and their role in the flotation of quartz. Canadian Metallurgical Quarterly, 13(2), 395-404.
- LASKOWSKI, J.S., VURDELA, R.M., LIU, Q., 1988. The colloid chemistry of weak-electrolyte collector flotation. in Proc. 16th Int. Mineral Processing Congress, Forssberg, K.S., Ed., Elsevier, Part A, pp. 703-715.
- LASKOWSKI, J.S., YORDAN, J.L., YOON, R.H., 1989. Electrokinetic potential of microbubbles generated in aqueous solutions of weak electrolyte type surfactants. Langmuir, 5(2), 373-376.
- LIU, X., LIU, S., FAN, M., ZHANG, L., 2017. Decrease of hydrophilicity of lignite using CTAB: Effects of adsorption differences of surfactant onto mineral composition and functional groups. Fuel, 197, 474-481.
- MARGANSKI, R.E., ROWELL, R.L., 1988. Electrophoretic mobility distribution in aqueous dispersions bituminous coal and residual hydrocarbon materials. Energy & Fuels, 2(2), 132-136.
- MCSHEA, J.A., CALLAGHAN, I.C., 1983. Electrokinetic potentials at the gas-aqueous interface by spinning cylinder electrophoresis. Colloid and Polymer Science, 261(9), 757-766.
- MITCHELL, T.K., NGUYEN, A.V., GEOFFREY, T., EVANS, M., 2005. Heterocoagulation of chalcopyrite and pyrite minerals in flotation separation. Advances in Colloid and Interface Science, 114–115, 227-237.
- NOVICH, B.E., RING, T.A., 1985. A Predictive model for the alkylamine-quartz flotation system. Langmuir, 1(6), 701-708.
- PYKE, B., FORNASIERO, D., RALSTON J., 2003. Bubble particle heterocoagulation under turbulent conditions. Journal of Colloid and Interface Science, 265, 141-151.
- SCHUBERT, H., 2005. Nanobubbles, hydrophobic effect, heterocoagulation and hydrodynamics in flotation. International Journal of Mineral Processing, 78, 11-21.
- SCHULZE, H.J., STOCKELHUBER, W., 2005. Flotation as a Heterocoagulation Process: Possibilities of Calculating the Probability of the Microprocesses, Rupture of the Intervening Thin Liquid Film, and Progress in Modeling of the Overall Process. In: Coagulation and Flocculation. (Edited by H. Stechemesser and B. Dobias), 455-517.
- SMITH, R.W., SCOTT J.L., 1990. Mechanisms of dodecylamine flotation of quartz. Mineral Processing and Extractive Metallurgy Review, 7(2), 81-94.
- TAKEDA, S., USUI, S., 1987. Adsorption of dodecylammonium ion on quartz in relation to its flotation. Colloids and Surfaces, 23(1-2), 15-28.
- USUI, S., SASAKI, H., 1978. Zeta potential measurements of bubbles in aqueous surfactant solutions. Journal of Colloid and Interface Science, 65(1), 36-45.
- VURDELA, R.M., LASKOWSKI, J.S., 1987. Positively charged colloidal species in aqueous anionic surfactant solutions. Colloids and Surfaces, 22(1), 77-80.
- WANG, L.K., KAO, S.F., LOSHIN, A.L., 1979. Application and determination of surface-active agents Part II: Anionic surfactants. Proceedings of Industrial Waste Conference, 33, 918.
- WANG, X., LIU, J., DU, H., MILLER, J.D., 2010. States of adsorbed dodecyl amine and water at a silica surface as revealed by vibrational spectroscopy. Langmuir, 26(5), 3407-3414.
- YOON, R.H., YORDAN, J.L., 1986. Zeta-potential measurements on microbubbles generated using various surfactants. Journal of Colloid Interface Science, 113(2),430-438.
- YOON, R.H., YORDAN, J.L., 1991. The critical rupture thickness of thin water films on hydrophobic surfaces. Colloid Interface Science, 146(2), 565-572.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-499a91d3-9e00-41df-ae9a-daf6fcb66bc9