ACTIVATED CARBON ADSORPTION OF GOLD FROM THIOUREA SOLUTIONS

被引：10

作者：

JUAREZ, CM

OLIVEIRA, JF

机构：

[1] Department of Materials and Metallurgical Engineering, COPPE/UFRJ, Federal University of Rio de Janeiro, Caixa Postal 68505 CEP 21945, Cidade Universitária, Rio de Janeiro

来源：

MINERALS ENGINEERING | 1993年 / 6卷 / 06期

关键词：

HYDROMETALLURGY; GOLD ADSORPTION; ACTIVATED CARBON; THIOUREA SOLUTIONS;

D O I：

10.1016/0892-6875(93)90112-Z

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Studies were carried out to evaluate the adsorption of gold and thiourea onto activated carbon. In the temperature range studied, 15 to 55-degrees-C, both thiourea and gold adsorption results showed good agreement with the Freundlich isotherm. However, while the thiourea adsorption is exothermic, the gold adsorption proved to be an endothermic process. An activation energy of 3.5 Kcal/mol was determined for gold adsorption, indicating that the controlling step in the kinetics of the process is the diffusion onto the porous structure of the activated carbon. A simple empirical model allowed the evaluation of the gold adsorption rate in bench scale batch tests.

引用

页码：575 / 583

页数：9

共 10 条

[1] KINETICS OF GOLD CYANIDE ADSORPTION ON ACTIVATED-CHARCOAL [J].

CHO, EH ;

DIXON, SN ;

PITT, CH .

METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1979, 10 (02) :185-189

[2]

DESCHENES G, 1985, LIT SURVEY RECOVERY, P85

[3]

DESCHENES G, 1987, P INT S GOLD METALL

[4]

Garten V.A, 1957, REV PURE APPL CHEM, V7, P69

[5]

JUAREZ CM, 1991, THESIS FEDERAL U RIO

[6]

LABROOY SR, 1986, P INT C GOLD GOLD 10, V2

[7]

MERELLO RP, 1987, MINERALES, V42, P25

[8]

MONHEMIUS AJ, 1987, 2 P M SO HEM MIN TEC, V2, P280

[9]

SUBRAHMANYAN TV, 1988, 1988 P INT C GOLD VA, P265

[10]

Wyslouzil D.M., 1987, P INT S GOLD METALLU, P259

← 1 →