Abstract
The flotation and adsorption properties of two ionic collectors (n-dodecylamine andn-dodecanoic acid) are compared on the bases of results of mercury flotation in the model flotation apparatus and electrochemical measurements of the double layer capacity.
The flotation recovery and the adsorption parameters (standard free enthalpyΔG° A, the interaction coefficient of Frumkin's isotherm, the surface area per molecule) have been determined within the pH range 2.5–12 in solutions of various collector concentrations containing 0.1 N KCl. The maxima of flotation recovery and surface excess have been found at pHs corresponding to pK values for both substances. The influence of the electrolyte on flotation recovery and the gas bubble size distribution dependent upon the pH of the solution is presented forn-dodecanoic acid. The maxima of flotation recovery are involved through the formation of ion-molecule associates (1∶1) as well as an optimum of the bubble size distribution.
Similar content being viewed by others
References
Volke K, Neubert H (1981) Z phys Chem 262:1, 39
Volke K, Neubert H (1981) Freib Forschungsh A638:71
Para G, Volke K, Neubert H (1981) Coll & Polym Sci 259:11, 1092
Volke K, Neubert H (1984) Z phys Chem 265:5, 968
Volke K, Pawlikowska-Czubak J, Para G, Neubert H (1984) Coll & Polym Sci 262:3, 245
Damaskin BB (1962) Dokl Akademii Nauk 144:1073
Frumkin AN (1925) Z phys Chem 116:466
Rosano HL, Breindel K, Schulman JH, Eydt AJ (1966) J Coll Interf Sci 22:1, 58
Beunen JA, Mitchell DJ, White LR (1978) J Chem Soc Faraday Trans I 74:2501
Beunen JA, White LR (1982) Coll Surf 4:61
Lorenz W (1958) Z Elektrochem 62:2, 192
Pawlikowska-Czubak J (1963) Ph D Thesis Jagell Univ Kraków
Long FA, Nutting GG, Harkins WD (1937) J Am Chem Soc 59:2197
Lucassen-Reynders EH (1972) J Coll Interf Sci 41:156
Baker RH, Shafrin EG, Zisman WA (1952) J Phys Chem 56:3, 405
Merker RL, Zisman WA (1952) J Phys Chem 56:399
Author information
Authors and Affiliations
Additional information
Publ.-No. 811 from Research Institute of Mineral Processing, Academy of Sciences of the German Democratic-Republic, Freiberg.
Rights and permissions
About this article
Cite this article
Para, G., Volke, K., Pomianowski, A. et al. Surface activity and mercury flotation in solutions of n-dodecanoic acid and n-dodecylamine. Colloid & Polymer Sci 264, 260–266 (1986). https://doi.org/10.1007/BF01414963
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01414963