The hydrophobic force in flotation-a critique

被引:81
作者
Ralston, J
Fornasiero, D
Mishchuk, N
机构
[1] Univ S Australia, Ian Wark Res Inst, Mawson Lakes, SA 5095, Australia
[2] Natl Acad Sci Ukraine, Inst Colloid Chem & Chem Water, UA-252680 Kiev, Ukraine
基金
澳大利亚研究理事会;
关键词
flotation; hydrophobic force; film stability;
D O I
10.1016/S0927-7757(01)00715-4
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Whether or not a particle is captured by a rising bubble during flotation is determined, to a large degree, by the hydrophobic force of attraction. The origins of the latter force have remained obscure, despite the early insights of flotation scientists. Recent evidence indicates that the surface properties of the solid substrate, the type and concentration of dissolved gas, and surface microbubbles all influence the stability of the thin, aqueous film that forms between a particle and a gas bubble during the final stages of the capture process. The accurate description of the forces that operate across this film remains a serious challenge. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:39 / 51
页数:13
相关论文
共 93 条
[1]  
Adamson A., 1990, PHYSICAL CHEM SURFAC
[2]   Fluorescence study of the aggregation behavior of different surfactants in aqueous solutions in the presence and in the absence of gas [J].
Alargova, RG ;
Kochijashky, II ;
Zana, R .
LANGMUIR, 1998, 14 (07) :1575-1579
[3]  
[Anonymous], SURFACE TENSION ADSO
[4]  
[Anonymous], T I MIN METALL C
[5]   Thermodynamic analysis of bridging bubbles and a quantitative comparison with the measured hydrophobic attraction [J].
Attard, P .
LANGMUIR, 2000, 16 (10) :4455-4466
[6]   EVIDENCE THAT POLYWATER IS A COLLOIDAL SILICATE SOL [J].
BASCOM, WD ;
BROOKS, EJ ;
WORTHING.BN .
NATURE, 1970, 228 (5278) :1290-&
[7]   STABILITY OF AQUEOUS FILMS ON HYDROPHOBIC METHYLATED SILICA [J].
BLAKE, TD ;
KITCHENE.JA .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1972, 68 (08) :1435-&
[8]   DIRECT OBSERVATION OF A PB DITHIOPHOSPHINATE COMPLEX ON GALENA MINERAL SURFACES USING SIMS [J].
BRINEN, JS ;
NAGARAJ, DR .
SURFACE AND INTERFACE ANALYSIS, 1994, 21 (12) :874-876
[9]   Effect of salts and dissolved gas on optical cavitation near hydrophobic and hydrophilic surfaces [J].
Bunkin, NF ;
Kiseleva, OA ;
Lobeyev, AV ;
Movchan, TG ;
Ninham, BW ;
Vinogradova, OI .
LANGMUIR, 1997, 13 (11) :3024-3028
[10]   Forces measured between hydrophobic surfaces due to a submicroscopic bridging bubble [J].
Carambassis, A ;
Jonker, LC ;
Attard, P ;
Rutland, MW .
PHYSICAL REVIEW LETTERS, 1998, 80 (24) :5357-5360