Potential of biotechnology for metals extraction in Zimbabwe: a review

Chingwaru, Walter; Vidmar, Janja; Chingwaru, Constance

doi:10.17159/2411-9717/2017/v117n4a10

Cited by 5 publications

(3 citation statements)

References 19 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mesophilic iron and sulfur oxidizing bacteria as Acidithiobacillus ferroxidans, sulfuroxidizing Acidithiobacillus thioxidans, iron-oxidizing Leptospirillum ferriphilum and Leptospirillum ferrooxidans, moderately thermophilic bacteria, such as sulfuroxidizing Acidithiobacillus caldus and sulfur and iron oxidizing Sulfobacillus spp. has been reported to assist in the oxidation of sulfides [44,52].…”

Section: Microbial Leachingmentioning

confidence: 99%

Hydrometallurgical Recovery of Gold from Mining Wastes

Neag¹,

Kovács²,

Dinca³

et al. 2021

Strategies of Sustainable Solid Waste Management

View full text Add to dashboard Cite

Gold is a highly required material for a wide range of personal and industrial applications. The high demand for gold, together with the shortage of natural resources and high pollution potential of wastes generated during mining and ore processing activities led to search for alternative sources of gold. A possible source is represented by mine wastes resulting from the processing of polymetallic or sulfidic ores. The reprocessing of wastes and old tailings with moderate to low content of gold offers not only a business opportunity, but also enhances the quality of the surrounding environment, changes the land use and offers a wide range of socio-economic benefits. Cyanidation, the most widespread Au leaching option, is progressively abandoned due to the high risk associated with its use and to the low public acceptance. Therefore, alternative methods such as thiocyanate, thiourea, thiosulphate and halide leaching gained more and more interest. This chapter presents the most important features of some Au leaching methods, emphasizing their advantages, limitations and potential applications.

show abstract

Section: Microbial Leachingmentioning

confidence: 99%

Hydrometallurgical Recovery of Gold from Mining Wastes

Neag¹,

Kovács²,

Dinca³

et al. 2021

Strategies of Sustainable Solid Waste Management

View full text Add to dashboard Cite

show abstract

“…One of the promising approaches to solving these problems is considered to be a biotechnological (microbiological) method of developing ore metal-bearing deposits [1]. At present, a promising rapidly developing scientifi c discipline -«biogeotechnology of metals» has already been thoroughly formed, which develops methods for metal extraction from ores, rocks, and solutions under the infl uence of microorganisms and their metabolites at normal pressure and temperatures from 5 to 80 °С [2][3][4].…”

mentioning

confidence: 99%

“…Джандіері 1,2* , Д. Сахвадзе 3 , Б. Щукін 4 1 ТОВ «Металургійний інжиніринг та консалтинг», вул. Ахвледіані, 8, 0109, Тбілісі, Грузія 2 Незалежний дослідник, вул. Сатурна, 45, 04205, Лейпциг, Німеччина 3 ТОВ «Металеві порошки», вул.…”

unclassified

Underground Development of Mineral Subsoil Using Microorganisms: A Mini-Review

Jandieri,

Sakhvadze,

Schukin

2023

Mikrobiol. Z.

View full text Add to dashboard Cite

This mini-review is devoted to the analysis of the current state of the relatively rarely used underground bio-mining of natural minerals. On the basis of this analysis, it is substantiated that bacterial leaching technology has no alternative for environmentally safe and economically break-even mining of ore-bearing rocks and off -balance metal-bearing formations that are difficult to access, or unprofitable for traditional methods. It is emphasized that the efficiency of biotechnology depends on the accuracy of modeling and operational control of the working parameters of the process of biological extraction of metals, for which it is necessary to develop a new combined hydro-technical system with the possibility of the reverse technological influence on the regimes of leaching. Such controlled modes of the process are the intensity of forced aeration, pH level of the bacterial solution, amount of nutrient medium, and duration of leaching. To improve the accuracy of prediction and control of underground microbiological development, the use of a control method based on an adaptive-network-based fuzzy inference system (ANFIS) is recommended.

show abstract