Abstract
A study was performed on the adsorption of a hydrophobic polymer, FR-7A, on individual suspensions of coal, pyrite and shale minerals. A nephelometric method was employed for the determining FR-7A concentration in solutions. From the adsorption isotherms, thermodynamic derivations of ΔG 0ads , ΔG 0el , ΔGH, ΔH 0ads and ΔS 0ads were made. The study led to a number of findings: 1) adsorption of FR-7A on the minerals followed the Langmuir adsorption model; 2) FR-7A had a higher adsorption affinity to coal than to pyrite or to shale minerals; the higher affinity to coal could be attributed to “hydrophobic bonding”; 3) adsorption affinity of FR-7A on all minerals decreased as pH increased.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Y.A. Attia and J. Rubio, Determination of Very Low Concentrations of Polyacrylamide and Polyetheyleneoxide Flocculants by Nephelometry, Brit. Polym. J., 7, pp 135–138 (1975).
Pradip, Y.A. Attia and D.W. Fuerstenau, The Adsorption of Polyacrylamide Flocculants on Apatities, Colloid & Polymer Sci., 258, pp 1343–1353 (1980).
Y.A. Attia, Determination of Polymeric Flocculants Concentration by Nephelometry, Flocculation and Dewatering, Eds. B.M. Moudgil and B.J. Scheíner, Enginerring Foundation, AIChE (1990).
Y. Attia, S. Yu and S. Vecci, Selective Flocculation Cleaning Upper Freeport Coal with Totally Hydrophobic Polymeric Flocculant, Flocculation in Biotechnology and Separation Systems, Ed. by Y.A. Attia, Elsevier (1987).
Y.A. Attia and S. Yu, Production of Super-clean Coals from a High Sulfur Coal by Selective Flocculation, Processing and Utilization of High Sulfur Coals-II, Eds. Y.P. Chugh and R. Caudle, Elsevier (1987).
Y.A. Attia and K. Driscoll, Effects of Process Parameters on the Selective Flocculation Cleaning of Upper Freeport Coal, Interfacial Phenomena in Biotechnology and Materials Processing, Ed. by Y.A. Attia, p321–334, Elsevier (1987).
Y.A. Attia and K. Driscoll, Effects of Process Parameters on the Selective Flocculation Cleaning of Upper Freeport Coal, Interfacial Phenomena in Biotechnology and Materials Processing, Ed. by Y.A. Attia, p32I-334, Elsevier (1987).
ASTM, D3174 “Test for Ash in the Analysis Sample of Coal and Coke”, D3177 “Test for Total Sulfur in the Analysis Sample of Coal and Coke”, and D2492 “Test for Sulfur Forms Coal”, reapproved (1979).
F.F. Aplan, Coal Flotation, Flotation - A.M. Gaudin Memorial Volume, 2, Ed. by M.C. Fuerstenau (1979).
E.G. Kelly and D.J. Spottiswood, Introduction to Mineral Processing, Wiley Interscience Publication, p101 (1982).
D.Z. Wang, Mechanisms and Applications of Froth Flotation Reagents, China Metallurgy Publisher, pp 29 (1982).
S. Yu, Adsorption of a Hydrophobic Polymer and Its Role in Flocculation and Selective Flocculation of Ultrafine Coal Slurries, M.S. Thesis, The Ohio State University (1990).
D.J. Show, Introduction to Colloid and Surface Chemistry, Butterworths, 2nd edition (1970).
Y.A. Attia, F. Bavarian and K.H. Driscoll, Use of a Polyxanthate Dispersant for Ultrafine Pyrite Removal from High Sulfur Coal by Selective Flocculation, Coal Preparation, V6, p35–51 (1988).
W. Stumm and J. Morgan, Aquatic Chemistry, Wiley (1970).
D.W. Fuerstenau, Thermodynamics of Surfaces in Adsorption and Wetting, Principles of Flotation, Ed. by R.P. King, Monograph Series No. 3, SAIMM, Johannesburgh (1982).
H.V.V. Lawrence, Elements of Materials Science and Engineering, 4th ed., Addison-Wiley, p520 (1980).
C. Tanford, The Hydrophobic Effect: Formation of Micelles and Biological Membranes, Wiley & Sons (1980).
J.N. Israelachvili and R.M. Pashley, Measurement of the Hydrophobic Interaction between Two Hydrophobic Surfaces in Aqueous Electrolyte Solutions, J. Coll. & Interface Sci., V98, p500–514 (1985).
J.N. Israelachvili and D. Tabor, Frog. Surface Membrane Sci., 7 (1973).
V.G. Dashevsky and G.N. Sarkisov, Mol. Phys. 27, p1271 (1974).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1990 Elsevier Science Publishing Co., Inc.
About this chapter
Cite this chapter
Yu, S., Attia, Y.A. (1990). Thermodynamics of Adsorption of a Hydrophobic Polymeric Flocculant on Coal, Pyrite and Shale Minerals. In: Hanna, J., Attia, Y.A. (eds) Advances in Fine Particles Processing. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-7959-1_25
Download citation
DOI: https://doi.org/10.1007/978-1-4684-7959-1_25
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-7961-4
Online ISBN: 978-1-4684-7959-1
eBook Packages: Springer Book Archive