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CONTENTS

On the occasion of the 80^,h birthday of Professor Andrzej Pomianowski ............ 5

W. Barzyk, A. Kowal, A. Pomianowski, A. Rakowska, SEM/EDX and AFM study of gold cementation on copper(l) sulphide ............................................ 9

G.    A. Hope, R. Woods, K. Watling, Surface enhanced Raman scattering

spectroelectrochemical studies of minerał processing .................................... 21

P. Warszyński, B. Jachimska, Conformations of hydrophobic chains at

liquid/gas interface and their implications on surfactant adsorption ............... 39

A. Sokołowski, K. A. Wilk, U. Komorek, B. Rutkowski, L. Syper, Aggregation properties of cationic gemini surfactants in aqueous solution ....    51

M. Krzan, K. Malysa, Influence of frother concentration on bubble dimensions

and rising velocities ......................................................................................... 65

P. Nowak, B. Kozioł, On the rest potential of pyrite electrode in oxygen -free Solutions of iron (II) sulfate..................................................................... 77

J.    Grodzka, A. Krysztafkiewicz, T. Jesionowski, Carbonate-silicate fillers

modified with two types of proadhesive compounds ...................................... 89

M. Tórz, K. Alejski, J. Szymanowski, Recovery of zinc(II) from model

hydrochloric acid Solutions in hollow fiber modules....................................... 101

C. Kozłowski, W. Apostoluk, W. Walkowiak, A. Kita, Removal of Cr(VI),

Zn(II) and Cd(II) ions by transport across polymcr inclusion membranes

with basie ion carriers...................................................................................... 115

A.M Amer, Processing of copper anode-slimes for extraction of metal values ....    123

K.    St. Sztaba, Evaluation of non-separation operations of minerał engineering ...    135

T. Dyr, P. Wodziński, Model particie velocity on a vibrating surface ................. 147

S. Simons, D. Rossetti, M. Spyridopoulos, X. Pepin, Micro-studies of minerał

processing fundamentals.................................................................................. 159

S. S. Ibrahim, H.A. Mohamed, T.R. Boulos, Dry magnetic separation of nepheli-

nesyenite ores................................................................................................... 173

T. N. Khmeleva, W. Skinner, D.A. Beattie, T.V. Georgiev, The effect of sulphite

on the xanthate-induced flotation of copper-activated pyrite .......................... 185

H.    Ceylan, C. Hięyilmaz, T. Giiler, Collectorless flotation of lead and zinc

sulphide from Derekóy ore deposite................................................................ 197

K. Seifert, A. Moska, F. Domka, The effect of waste phosphogypsum on the

denitrification and desulfurication processes .................................................. 209

M. Bartkowska, M. Regel-Rosocka, J. Szymanowski, Extraction of zinc(II), iron(lll) and iron(ii) with binary mixtures containing tributyl phosphate

and di(2-ethylhexyl)phosphoric acid or cyanex 302 ........................................ 217

M. Ulewicz, W. Walkowiak, Flotation of zinc(II) and cadmium(II) ions from

dilute aqueous Solutions in the presences of inorganic ligands ....................... 225

T. Gluba, The effect of wetting conditions on the strength of granules................ 233