Bioleaching for Copper Extraction of Marginal Ores from the Brazilian Amazon Region

被引：10

作者：

Oliveira do Nascimento, Dryelle Nazare ^{[1
]}

Lucheta, Adriano Reis ^{[1
]}

Palmieri, Mauricio Cesar ^{[2
]}

Vilaca do Carmo, Andre Luiz ^{[1
]}

Pereira Silva, Patricia Magalhaes ^{[1
]}

de Padua Ferreira, Rafael Vicente ^{[2
]}

Junca, Eduardo ^{[3
]}

Grillo, Felipe Fardin ^{[3
]}

Alves, Joner Oliveira ^{[1
]}

机构：

[1] Natl Serv Ind Training SENAI, SENAI Innovat Inst Mineral Technol, BR-66035405 Belem, Para, Brazil

[2] Itatijuca Biotech, BR-05508000 Sao Paulo, SP, Brazil

[3] Univ Extremo Sul Catarinense Unesc, Grad Program Mat Sci & Engn, BR-88806000 Criciuma, SC, Brazil

来源：

METALS | 2019年 / 9卷 / 01期

关键词：

biomining; bioleaching; mining tailings; copper; waste management; MINE TAILINGS; ACIDITHIOBACILLUS-FERROOXIDANS; THIOBACILLUS-FERROOXIDANS; FERROUS IRON; CHALCOPYRITE; OXIDATION; TEMPERATURE; THIOOXIDANS; MECHANISMS; CULTURE;

D O I：

10.3390/met9010081

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The use of biotechnology to explore low-grade ore deposits and mining tailings is one of the most promising alternatives to reduce environmental impacts and costs of copper extraction. However, such technology still depends on improvements to be fully applied in Brazil under industrial scale. In this way, the bioleaching, by Acidithiobacillus ferrooxidans, in columns and stirred reactors were evaluated regarding to copper extraction of a mineral sulfide and a weathered ore from the Brazilian Amazon region. Samples (granulometry of 2.0/4.75 mm) were characterized by X-ray diffraction (XRD), energy dispersive X-ray fluorescence (EDXRF) spectrometry and scanning electrons microscopy (SEM). The pH and Oxidation-reduction potential (Eh) were daily monitored and leachate samples were collected for copper extraction determination by EDXRF. After 47 days, the columns bioleaching efficiency was 1% (1298 mg Cu.L-1) and 0.95% (985 mg Cu.L-1) for 2.00/4.75 mm sulfide ore, respectively, whereas the stirred reactors bioleaching resulted in 4% (348 mg Cu.L-1) for the mineral sulfide and 47% (295.5 mg Cu.L-1) for the weathered ore.

引用

页数：13

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