Bacteria, hypertolerant to arsenic in the rocks of an ancient gold mine, and their potential role in dissemination of arsenic pollution

Drewniak, Łukasz; Styczek, Aleksandra; Majder–Łopatka, Małgorzata; Skłodowska, Aleksandra

doi:10.1016/j.envpol.2008.04.019

Cited by 115 publications

(90 citation statements)

References 27 publications

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“…Similarly, Acinetobacter sp. CS9 is capable of producing siderophore, which may have increased Cd mobility toward plants, resulting in enhanced phytoextraction by inoculated plants [57]. The present results show that Acinetobacter sp.…”

Section: Effect Of Bacterial Inoculation On Physiological Traits Of Csupporting

confidence: 56%

Role of Acinetobacter sp. CS9 in Improving Growth and Phytoremediation Potential of Catharanthus longifolius under Cadmium Stress

Yasin

Khan

Ahmad

et al. 2018

Pol. J. Environ. Stud.

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Section: Effect Of Bacterial Inoculation On Physiological Traits Of Csupporting

confidence: 56%

Role of Acinetobacter sp. CS9 in Improving Growth and Phytoremediation Potential of Catharanthus longifolius under Cadmium Stress

Yasin

Khan

Ahmad

et al. 2018

Pol. J. Environ. Stud.

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“…O23S and Aeromonas sp. O23A play a significant role in direct As mobilization [124,125]. In addition, siderophores produced by As-resistant Pseudomonas spp.…”

Section: Bioleaching Pre-treatment Releasing Arsenicmentioning

confidence: 99%

“…The results are presented as follows [124]: -Sinorhizobium sp. M14 produced at neutral pH a concentration of As (133.5 mg/L), 33.5% higher than control.…”

Section: Bioleaching Pre-treatment Releasing Arsenicmentioning

confidence: 99%

“…The medium was slightly alkaline, cell densities were 10 6 cells/mL and mineral samples weighed 5 g. Drewniak et al [125] postulated that arsenate released from the arsenite oxidation by strain M14 was coprecipitated with ferric ions (released from arsenopyrite at neutral pH), producing a dark orange scorodite-like precipitate on the surface. Likewise, Pseudomonas OS8 and OS20 exhibit a high capacity for arsenate reduction [124] and, in Fe-limiting conditions, produce different siderophores such as hydroxamate-type (OS8) and catechol-type (OS20) [125]. Siderophores bind ferric ions in complexes that get into the bacterial cell by active transport mechanisms.…”

Section: Bioleaching Pre-treatment Releasing Arsenicmentioning

confidence: 99%

“…The proposed idea of As-recovery by bio-oxidation from enargite or As-rich Cu concentrates comes from studies on arsenopyrite dissolution. Drewniak et al [124] studied heterotrophic microorganisms hypertolerant to As (up to 500 mM of arsenate) from Gertruda Adit, a gallery within the Zloty Stok mine, south-west Poland. In the rocks of this site, As occurs as loellingite (FeAs 2 ) and arsenopyrite.…”

Section: Bioleaching Pre-treatment Releasing Arsenicmentioning

confidence: 99%

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Bioleaching of Arsenic-Bearing Copper Ores

2018

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Abstract:World copper (Cu) production has been strongly affected by arsenic (As) content, because As-rich Cu concentrates are not desirable in the metal foundries. When As-rich Cu concentrates are processed by smelting they release As as volatile compounds into the atmosphere and inside furnaces, generating serious risks to human health. In recent years, exports of Cu concentrates are being penalized for the increasingly high As content of the ores, causing economies that depend on the Cu market to be seriously harmed by this impurity. In the last few decades, biohydrometallurgy has begun to replace the traditional Cu sulfide processing, however bioleaching processes for As-bearing Cu ores which contain enargite are still in the development stage. Researchers have not yet made successful progress in enargite bioleaching using typical mesophilic and thermophilic bacteria that oxidize sulfide. New approaches based on direct oxidative/reductive dissolution of As from enargite could result in significant contributions to Cu biohydrometallurgy. Thus, As-rich Cu concentrates could be pre-treated by bioleaching, replacing current technologies like roasting, pressure leaching and alkaline leaching by selective biological arsenite oxidation or arsenate reduction. In this article, we review the As problem in Cu mining, conventional technologies, the biohydrometallurgy approach, and As bioleaching as a treatment alternative.

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Arsenic‐tolerant microbial consortia from sediments of Copahue geothermal system with potential applications in bioremediation

2019

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Although arsenic (As) is recognized as a toxic element for living species, some microorganisms have the ability to tolerate and transform it; recent studies have proposed to take advantage of such capacity to develop sustainable bioremediation strategies. In this study, we evaluated the adaptation to increasing concentrations of As(III) and As(V) of three metabolically different microbial cultures (heterotrophic, autotrophic–acidophilic, and anaerobic) obtained from a sample with low‐soluble As content from the Copahue geothermal system. At the end of the adaptation process, the heterotrophic culture was able to grow at 20 mM and 450 mM of As(III) and As(V), respectively; the autotrophic–acidophilic culture showed tolerance to 15 mM of As(III) and 150 mM of As(V), whereas the anaerobic culture only developed in As(V) at concentrations up to 50 mM. The most tolerant consortia were characterized by their growth performance, complexity, and the presence of genes related to As metabolism and resistance. Regarding the consortia complexity, the predominant genera identified were: Paenibacillus in both heterotrophic consortia, Acidithiobacillus in the autotrophic–acidophilic consortium tolerant to As(III), Acidiphilium in the autotrophic–acidophilic consortium tolerant to As(V), and Thiomonas and Clostridium in the anaerobic consortium. This study is the first report of As tolerance microorganisms obtained from Copahue and reasserts the versatility and flexibility of the community of this natural extreme environment; also, it opens the door to the study of possible uses of these consortia in the design of biotechnological processes where the As concentration may fluctuate.

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Bacteria, hypertolerant to arsenic in the rocks of an ancient gold mine, and their potential role in dissemination of arsenic pollution

Cited by 115 publications

References 27 publications

Role of Acinetobacter sp. CS9 in Improving Growth and Phytoremediation Potential of Catharanthus longifolius under Cadmium Stress

Role of Acinetobacter sp. CS9 in Improving Growth and Phytoremediation Potential of Catharanthus longifolius under Cadmium Stress

Bioleaching of Arsenic-Bearing Copper Ores

Arsenic‐tolerant microbial consortia from sediments of Copahue geothermal system with potential applications in bioremediation

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