Biosynthesis of iron oxide nanoparticles from mineral coal tailings in a stirred tank reactor

Maass, Danielle; Valério, Alexsandra; Lourenço, Luís Antônio; Oliveira, Débora de; Hotza, Dachamir

doi:10.1016/j.hydromet.2019.01.010

Cited by 21 publications

(17 citation statements)

References 27 publications

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“…Iron oxide (Fe 2 O 3 ) NPs were biosynthesized by R. erythropolis ATCC 427 cultures during biomining processes (Maas et al 2019a(Maas et al , 2019b. In this context, parameters of the designed implants, as the stirring rate and oxygen flow rate, appeared to determine the size of the produced Fe 2 O 3 NPs, allowing to obtain fairly monodisperse populations (50 or 100 nm), as well as α-Fe 2 O 3 and β-Fe 2 O 3 crystalline structures (Maas et al 2019a(Maas et al , 2019b. The role of rhodococci in the microbial nanotechnology field was deeper analyzed by Kundu and co-workers (2014), who focused on biosynthesis of extracellular ZnO NPs by R. pyridinivorans NT2.…”

Section: Metal(loid)-based Nanostructuresmentioning

confidence: 99%

“…10 nm) Otari et al 2012 R. pyridinivorans NT2 Cells growing in rich medium or cell-free extracts; ZnSO 4 ·H 2 O as precursor Production of extracellular spherical and hexagonal crystalline ZnO NPs (ca.100 nm) Kundu et al 2014 R. aetherivorans BCP1 Cells growing in rich medium; TeO 3 2− as precursor Production of intracellular TeNRs (from 100 to 500 nm) Presentato et al 2016 Resting cells; TeO 3 2− as precursor Production of intracellular crystalline TeNPs and TeNRs (from 200 to 700 nm) Presentato et al 2018b Cells growing in rich medium; SeO 3 2− as precursor Production of SeNPs and SeNRs (from 50 to 600 nm) Presentato et al 2018a R. erythropolis ATCC 4277 Cells growing in rich medium or in a stirred tank reactor; sulfate mineral coal tailings as precursor Production of crystalline Fe 2 O 3 NPs (ca. 50 or 100 nm) Maas et al 2019a , 2019b a In C x , x indicates the number of carbons in the alkane chain …”

Section: Biosurfactantsmentioning

confidence: 99%

“…10 nm), spherical, and crystalline AgNPs (Otari et al 2012 ), which were also described both as an antimicrobial, to be used in commercialized textiles and wound dressings, or an antitumor agent (Subbaiya et al 2014 ). Iron oxide (Fe 2 O 3 ) NPs were biosynthesized by R. erythropolis ATCC 427 cultures during biomining processes (Maas et al 2019a , 2019b ). In this context, parameters of the designed implants, as the stirring rate and oxygen flow rate, appeared to determine the size of the produced Fe 2 O 3 NPs, allowing to obtain fairly monodisperse populations (50 or 100 nm), as well as α-Fe 2 O 3 and β-Fe 2 O 3 crystalline structures (Maas et al 2019a , 2019b ).…”

Section: Metal(loid)-based Nanostructuresmentioning

confidence: 99%

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Biotechnology of Rhodococcus for the production of valuable compounds

Cappelletti

Presentato

Piacenza

et al. 2020

Appl Microbiol Biotechnol

111

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Bacteria belonging to Rhodococcus genus represent ideal candidates for microbial biotechnology applications because of their metabolic versatility, ability to degrade a wide range of organic compounds, and resistance to various stress conditions, such as metal toxicity, desiccation, and high concentration of organic solvents. Rhodococcus spp. strains have also peculiar biosynthetic activities that contribute to their strong persistence in harsh and contaminated environments and provide them a competitive advantage over other microorganisms. This review is focused on the metabolic features of Rhodococcus genus and their potential use in biotechnology strategies for the production of compounds with environmental, industrial, and medical relevance such as biosurfactants, bioflocculants, carotenoids, triacylglycerols, polyhydroxyalkanoate, siderophores, antimicrobials, and metal-based nanostructures. These biosynthetic capacities can also be exploited to obtain high value-added products from low-cost substrates (industrial wastes and contaminants), offering the possibility to efficiently recover valuable resources and providing possible waste disposal solutions. Rhodococcus spp. strains have also recently been pointed out as a source of novel bioactive molecules highlighting the need to extend the knowledge on biosynthetic capacities of members of this genus and their potential utilization in the framework of bioeconomy. Key points • Rhodococcus possesses promising biosynthetic and bioconversion capacities. • Rhodococcus bioconversion capacities can provide waste disposal solutions. • Rhodococcus bioproducts have environmental, industrial, and medical relevance.

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Section: Metal(loid)-based Nanostructuresmentioning

confidence: 99%

Section: Biosurfactantsmentioning

confidence: 99%

Section: Metal(loid)-based Nanostructuresmentioning

confidence: 99%

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Biotechnology of Rhodococcus for the production of valuable compounds

Cappelletti

Presentato

Piacenza

et al. 2020

Appl Microbiol Biotechnol

111

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“…For this kind of application, gold, magnetic, or cerium oxide nanoparticles, carbon nanotubes, graphene oxide, or even polymers may be conjugated to the aptamers (Sharma et al 2015). These nanostructured supports have been commonly synthesized and applied (Almeida et al 2017;Valério et al 2017;Chiaradia et al 2018;Hoelscher et al 2018;Maass et al 2019).…”

Section: Aptamers Conjugationmentioning

confidence: 99%

An overview and future prospects on aptamers for food safety

Schmitz

Valério

Oliveira

et al. 2020

Appl Microbiol Biotechnol

Self Cite

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Introduction Many bacteria are responsible for infections in humans and plants, being found in vegetables, water, and medical devices. Most bacterial detection methods are time-consuming and take days to give the result. Aptamers are a promising alternative for a quick and reliable measurement technique to detect bacteria present in food products. Selected aptamers are DNA or RNA oligonucleotides that can bind with bacteria or other molecules with affinity and specificity for the target cells by the SELEX or cell-SELEX technique. This method is based on some rounds to remove the non-ligand oligonucleotides, leaving the aptamers specific to bind to the selected bacteria. Compared with conventional methodologies, the detection approach using aptamers is a rapid, low-cost form of analysis. Objective This review summarizes obtention methods and applications of aptamers in the food industry and biotechnology. Besides, different techniques with aptamers are presented, which enable more effective target detection. Conclusion Applications of aptamers as biosensors, or the association of aptamers with nanomaterials, may be employed in analyses by colorimetric, fluorescence, or electrical devices. Additionally, more efficient ways of sample preparation are presented, which can support food safety to provide human health, with a low-cost method for contaminant detection. Key points • Aptamers are promising for detecting contaminants outbreaks. • Studies are needed to identify aptamers for different targets.

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“…Essa análise possibilitou quantificar o teor de magnetita, hematita e ilmenita presentes na amostra em 69, 23 e 6%, respectivamente. Para complementar essa caracterização, poderia ser realizada a quantificação dos diferentes estados de oxidação do ferro, sobretudo a razão de íons ferro ferroso e ferro férrico (Fe +2 e Fe +3 ) (CETEM, 2010;MAASS et al, 2019). Visando à aplicação em asfalto, tais informações seriam importantes para estudar as propriedades magnéticas do mineral e a taxa de aquecimento de misturas betuminosas contendo magnetita.…”

Section: Espectrometria Mössbauerunclassified

Caracterização tecnológica e reaproveitamento de rejeitos de magnetita em misturas asfálticas e concreto – uma revisão

Ferrazzo

Bragagnolo

Korf

2020

Rev. Bras. Ciênc. Ambient. (Online)

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A magnetita consiste em um mineral com excelentes propriedades magnéticas e mecânicas, estando presente em rejeitos da extração de ferro, estes, disponíveis mundialmente em milhões de toneladas depositadas em aterros. Ao considerar a variabilidade das características deste material, conforme especificidades da jazida de extração e das operações de processamento e reprocessamento, para a sua aplicação tecnológica é fundamental realizar a caracterização do resíduo. As mais promissoras formas de reaproveitamento do rejeito de magnetita referem-se a sua aplicação em asfalto e em concreto. Neste contexto, este trabalho aborda as principais técnicas de caracterização tecnológica de rejeitos de magnetita e suas contribuições, bem como resultados de estudos da incorporação do subproduto mineral em misturas betuminosas e concreto. Identificou-se que as técnicas utilizadas analisam os rejeitos e/ou material asfáltico compósito e betão considerando as propriedades físicas, químicas, mineralógicas e termodinâmicas. Verificou-se que o rejeito de magnetita, como substituinte parcial e integral do material de enchimento, melhorou a resistência à corrosão e às rachaduras das misturas asfálticas. Além disso, o uso de pó de magnetita, extraído do resíduo, melhorou a rigidez e a resposta elástica, bem como promoveu a cura de microfissuras da mistura betuminosa. A incorporação de resíduos do mineral em pó no concreto resultou em melhorias na trabalhabilidade e resistência do material. As informações desta revisão oferecem um panorama das técnicas de caracterização e das perspectivas de reciclagem dos rejeitos de magnetita no setor da construção civil.

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Biosynthesis of iron oxide nanoparticles from mineral coal tailings in a stirred tank reactor

Cited by 21 publications

References 27 publications

Biotechnology of Rhodococcus for the production of valuable compounds

Biotechnology of Rhodococcus for the production of valuable compounds

An overview and future prospects on aptamers for food safety

Caracterização tecnológica e reaproveitamento de rejeitos de magnetita em misturas asfálticas e concreto – uma revisão

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