Possible bioremediation of arsenic toxicity by isolating indigenous bacteria from the middle Gangetic plain of Bihar, India

Satyapal, Ghanshyam Kumar; Mishra, Santosh Kumar; Srivastava, Amrita; Ranjan, Rajesh Kumar; Prakash, Krishna; Haque, Rizwanul; Kumar, Nitish

doi:10.1016/j.btre.2018.02.002

Cited by 78 publications

(23 citation statements)

References 17 publications

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“…Finally, it is worth noticing that both arsenate reductase (codified by arrA or arsC genes) only amplified in cultures supplemented with As(III), and that the amplifications of two forms of the primers that codified for the arsenite oxidase was observed in the anaerobic culture supplemented with arsenate Ana(As 5+ 50 mM). Our results, together with other related studies, prove the need to increase the knowledge of microbial resistance mechanisms to improve the design of primers, not only for the characterization of species but, more importantly, to enable the use of specific resistance genes as markers of As environmental contamination .…”

Section: Discussionsupporting

confidence: 66%

“…Moreover, the arsenite oxidase is encoded by aio genes which are phylogenetically and ecologically widespread in bacteria and archaea , these aio genes have been amplified from environmental samples with very low levels of As contamination showing that As‐oxidizing microorganisms are quite ubiquitous . Microorganisms that develop in environments exposed to fluctuating As concentration or in areas which have had high As levels in the past are specially interesting to study and their specialized metabolisms have been proposed as a viable As bioremediation strategy as well as for others biotechnological applications; moreover, natural environments exposed to As have been the source of this microorganisms able to tolerate and metabolize As compounds .…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionsupporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

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

2019

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“…Two indigenous strains, AK1 and AK9, belonging to the genus of Pseudomonas, have been isolated from As-contaminated water of the Ganga basin. The strains have been reported to be resistant towards As and other heavy metals, like silver (Ag), cadmium (Cd), cobalt (Co), Cr, Cu, mercury (Hg), Ni, and lead (Pb) 57. Ex-situ technique involves the transport of contaminated soil and water from the contaminated area to another site for further treatment.…”

Section: Discussionmentioning

confidence: 99%

Bioremediation Options for Heavy Metal Pollution

Kapahi

Sachdeva

2019

Journal of Health and Pollution

271

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Background.Rapid industrialization and anthropogenic activities such as the unmanaged use of agro-chemicals, fossil fuel burning and dumping of sewage sludge have caused soils and waterways to be severely contaminated with heavy metals. Heavy metals are non-biodegradable and persist in the environment. Hence, remediation is required to avoid heavy metal leaching or mobilization into environmental segments and to facilitate their extraction.Objectives.The present work briefly outlines the environmental occurrence of heavy metals and strategies for using microorganisms for bioremediation processes as reported in the scientific literature.Methods.Databases were searched from different libraries, including Google Scholar, Medline and Scopus. Observations across studies were then compared with the standards for discharge of environmental pollutants.Discussion.Bioremediation employs microorganisms for removing heavy metals. Microorganisms have adopted different mechanisms for bioremediation. These mechanisms are unique in their specific requirements, advantages, and disadvantages, the success of which depends chiefly upon the kind of organisms and the contaminants involved in the process.Conclusions.Heavy metal pollution creates environmental stress for human beings, plants, animals and other organisms. A complete understanding of the process and various alternatives for remediation at different steps is needed to ensure effective and economic processes.Competing interests.The authors declare no competing financial interests.

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“…( 8)), the design parameters K and N 0 were found using Eqs. (5) and (6). The minimum column height (x 0 ) required to produce an effluent concentration of C B was calculated using Eq.…”

Section: Analysis and Modeling Of Column Datamentioning

confidence: 99%

“…

2 ), depending on the types of sediment or minerals in the water source areas or the pH value of the water [3]. While As (V) species are less toxic and strongly adsorbed to different types of mineral surfaces, especially iron hydroxides/oxides [4], As (III) species are not only more toxic than arsenate but also more difficult to eliminate from water [5].Both arsenic forms had been detected in Vietnam. Winkel et al [6] has stated that the arsenic

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confidence: 99%

Removal of Arsenic from Groundwater Using Lamdong Laterite as a Natural Adsorbent

Nguyen¹,

Sanou²,

Paré³

et al. 2020

Pol. J. Environ. Stud.

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Possible bioremediation of arsenic toxicity by isolating indigenous bacteria from the middle Gangetic plain of Bihar, India

Cited by 78 publications

References 17 publications

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

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

Bioremediation Options for Heavy Metal Pollution

Removal of Arsenic from Groundwater Using Lamdong Laterite as a Natural Adsorbent

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