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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Biomining of iron-containing nanoparticles from coal tailings

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Author(s):
Maass, Danielle [1] ; Machado, Morgana de Medeiros [2] ; Rovaris, Beatriz Cesa [2] ; Bernardin, Adriano Michael [3] ; de Oliveira, Debora [2] ; Hotza, Dachamir [2]
Total Authors: 6
Affiliation:
[1] Fed Univ Sao Paulo UNIFESP, Inst Sci & Technol ICT, BR-12231280 Sao Jose Dos Campos, SP - Brazil
[2] Fed Univ Santa Catarina UFSC, Dept Chem & Food Engn EQA, BR-88040900 Florianopolis, SC - Brazil
[3] Univ Extremo Santa Catarina UNESC, Dept Mat Engn PPGCEM, BR-88806000 Criciuma, SC - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Applied Microbiology and Biotechnology; v. 103, n. 17, p. 7231-7240, SEP 2019.
Web of Science Citations: 0
Abstract

Sulfur minerals originating from coal mining represent an important environmental problem. Turning these wastes into value-added by-products can be an interesting alternative. Biotransformation of coal tailings into iron-containing nanoparticles using Rhodococcus erythropolis ATCC 4277 free cells was studied. The influence of culture conditions (stirring rate, biomass concentration, and coal tailings ratio) in the particle size was investigated using a 2(3) full factorial design. Statistical analysis revealed that higher concentrations of biomass produced larger sized particles. Conversely, a more intense stirring rate of the culture medium and a higher coal tailings ratio (% w/w) led to the synthesis of smaller particles. Thus, the culture conditions that produced smaller particles (< 50 nm) were 0.5 abs of normalized biomass concentration, 150 rpm of stirring rate, and 2.5% w/w of coal tailings ratio. Composition analyses showed that the biosynthesized nanoparticles are formed by iron sulfate. Conversion ratio of the coal tailings into iron-containing nanoparticles reached 19%. The proposed biosynthesis process, using R. erythropolis ATCC 4277 free cells, seems to be a new and environmentally friendly alternative for sulfur minerals reuse. (AU)

FAPESP's process: 19/07659-4 - Valorization of metals present in metal-rich wastes by biomining process - BIOMETALVALUE
Grantee:Danielle Maass
Support Opportunities: Regular Research Grants