Seasonal change of microbial activity in microbially aided bioremediation

Schindler, Frank V.; Merbold, Lutz; Karlsson, Stefan; Sprocati, Anna Rosa; Kothe, Erika

doi:10.1016/j.gexplo.2016.04.001

Cited by 9 publications

(9 citation statements)

References 44 publications

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“…This was reportedly the case with surface waters juxtaposing with AMD from 'Onyeama' coal mine that were reportedly enriched with TOC and toxic concentrations of HMs [22]. Similarly, AMDs have reportedly remained one of the major point sources for anthropogenic HMs pollution of waters globally [2,[11][12].…”

Section: Resultsmentioning

confidence: 99%

“…AMD impact on receiving environments has been the focus of extensive restoration efforts with the goals of reducing metal loads, as well as enhancing biotic structure (diversity and abundance) [9]. Remediation of AMD via application of chemical neutralization, ion exchange and construction of wetland has been suggested with some limitations opposing outright removal of AMD effect on water sources [10][11][12]. Therefore, bioremediation approach through the activities of autochthonous microorganisms has been suggested as the best eco-friendly option to decommissioning AMD stressors [9,[12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Remediation of AMD via application of chemical neutralization, ion exchange and construction of wetland has been suggested with some limitations opposing outright removal of AMD effect on water sources [10][11][12]. Therefore, bioremediation approach through the activities of autochthonous microorganisms has been suggested as the best eco-friendly option to decommissioning AMD stressors [9,[12][13]. In conjunction with oligotrophic heterotrophs (such as Acidocella and Thermoplasma), the early microbial colonizers indirectly ameliorate HMs toxicity via syntrophic commensal associations with iron-and sulphuroxidizers [3].…”

Section: Introductionmentioning

confidence: 99%

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Pollution Intensity of Hazardous Metals, Microbiome and Potential Bacterial-Based Toxic Metal Sequestration of Coal Mine Drainage

Oyetibo¹,

Enahoro²,

Ikwubuzo³

et al. 2021

Preprint

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Drains from coal mine remain a worrisome point source of toxic metal/metalloid pollutions to surface- and ground-waters worldwide, requiring sustainable remediation strategies. Understanding the microbial community subtleties through integrated metagenomic and geochemical data elicit selection of autochthonous bacteria consortium, spurring decommissioning of drains before discharge to hydrosphere. The drains contained characteristic sulphates (313.0 ± 15.9 mg/l), carbonate (253.0 ± 22.4 mg/l), and nitrate (86.6 ± 41.0 mg/l), having extreme tendencies to enrich receiving environments with extremely high pollution load index (3110 ± 942) for toxic metals/metalloid. The drains exerted severe degree of toxic metals/metalloid contamination (3,400,000 ± 240,000) and consequent astronomically high ecological risks in the order: Lead > Cadmium > Arsenic > Nickel > Cobalt > Iron > Chromium. Metagenome of the drains revealed dominance of Proteobacteria (50.8%) and Bacteroidetes (18.9%) among bacterial community, whereas, Ascomycota (60.8%) and Ciliophora (12.6%) dominated the eukaryotic community. A consortium of 7 autochthonous bacterial OTUs exhibited excellent urease activities (≥ 253 µmol urea/min.) with subsequent stemming of acidic pH to > 8.2 and sequestration of toxic metals (approx. 100% efficiency) as precipitates (15.6 ± 0.92 mg/ml). The coal mine drain is a point source for metals/metalloid pollution to surrounding hydrosphere, and its bioremediation is achievable with the bacteria consortium.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pollution Intensity of Hazardous Metals, Microbiome and Potential Bacterial-Based Toxic Metal Sequestration of Coal Mine Drainage

Oyetibo¹,

Enahoro²,

Ikwubuzo³

et al. 2021

Preprint

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“…Significant efforts have been devoted to reducing heavy metal loads and enhancing microbial activities [ 147 ]. Among the biotic approaches, autochthonous microorganisms are one of the best options for the decommissioning of AMD stressors [ 148 , 149 ].…”

Section: Bioremediation Of Contaminated Sites By Native Microorganismsmentioning

confidence: 99%

Biotechnology of Microorganisms from Coal Environments: From Environmental Remediation to Energy Production

Akimbekov

Digel

Tastambek

et al. 2022

Biology

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It was generally believed that coal sources are not favorable as live-in habitats for microorganisms due to their recalcitrant chemical nature and negligible decomposition. However, accumulating evidence has revealed the presence of diverse microbial groups in coal environments and their significant metabolic role in coal biogeochemical dynamics and ecosystem functioning. The high oxygen content, organic fractions, and lignin-like structures of lower-rank coals may provide effective means for microbial attack, still representing a greatly unexplored frontier in microbiology. Coal degradation/conversion technology by native bacterial and fungal species has great potential in agricultural development, chemical industry production, and environmental rehabilitation. Furthermore, native microalgal species can offer a sustainable energy source and an excellent bioremediation strategy applicable to coal spill/seam waters. Additionally, the measures of the fate of the microbial community would serve as an indicator of restoration progress on post-coal-mining sites. This review puts forward a comprehensive vision of coal biodegradation and bioprocessing by microorganisms native to coal environments for determining their biotechnological potential and possible applications.

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“…Diferentes aplicações, como biolixiviação e bio-oxidação de minérios de baixo teor, são processos comercialmente já estabelecidos (Wu et al, 2016;Potysz et al, 2016;Castro e Donati, 2016). Outros como aplicação de microrganismos na remoção de efluentes aquosos (Cayllahua e Torem, 2011;Veneu et al, 2013;Swenson et al, 2015), biorremediação de solos (Lien et al, 2016;Schindler et al, 2016) e bioflotação de minerais vêm sendo profundamente estudados visando a sua aplicação industrial Kim et al, 2015;Lopez et al, 2015;Sanwani et al, 2016;Ramos-Escobedo et al, 2016). A Tabela 7 apresenta uma lista de diferentes usos de microrganismos em processamentos industriais.…”

Section: Uso De Microrganismos No Processamento Industrialunclassified

Eletroflotação De Partículas Finas De Hematita Em Célula Modificada De Partridge Smith Usando Rhodococcus Opacus Como Biorreagente

HACHA¹

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Eletroflotação de partículas finas de hematita em célula modificada de Partridge Smith usandoRhodococcus opacus como biorreagente This work aims to evaluate the electroflotation of hematite fine particles in a modified Partridge Smith cell using Rhodococcus opacus. A hematite sample with grade 96% was used in this study; additionally, three granulometric fractions were selected: -53+38; -38+20 and -20 micrometers. The variables studied were pH, reagent concentration and current density. Zeta potential measurements and analysis by infrared spectroscopy were carried out to assess the interaction before and after reagents interaction. In order to gain a better understanding of the bubble diameter influence in the process, measurements of the diameter of hydrogen and oxygen bubbles were done. The average bubble diameter (d 32 ) was found in the range of 40 to 60 micrometers for the hydrogen bubbles and of 50 to 70 micrometers for the oxygen bubbles. Finally, electrocoagulation assays the hematite with R. opacus and sodium oleate were carried out. The reduction in particle size favored the floatability of hematite; this fact can be related to the bubble size generated in the process and the ability of R. opacus to form floccules through the interaction of Van der Waals. On the other hand, the increase of reagent concentration (R. opacus and sodium oleate) favored the floatability of hematite. Suitable pH values for hematite flotation were found around 6 and 7 for R. opacus and sodium oleate, respectively. Maximum hematite floatability with R. opacus using hydrogen bubbles was around 80% and around 65% with oxygen bubbles. Sodium oleate presented a better performance reaching a maximum floatability of approximately 98% for hydrogen bubbles and around 90% for oxygen bubbles. The characteristics of the bacterial surface and the bubble size were determinant factors in the hematite floatability. Therefore, the electroflotation process using R. opacus as collector is a potential technology regarding environmental issues found with the synthetic reagents.

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Seasonal change of microbial activity in microbially aided bioremediation

Cited by 9 publications

References 44 publications

Pollution Intensity of Hazardous Metals, Microbiome and Potential Bacterial-Based Toxic Metal Sequestration of Coal Mine Drainage

Pollution Intensity of Hazardous Metals, Microbiome and Potential Bacterial-Based Toxic Metal Sequestration of Coal Mine Drainage

Biotechnology of Microorganisms from Coal Environments: From Environmental Remediation to Energy Production

Eletroflotação De Partículas Finas De Hematita Em Célula Modificada De Partridge Smith Usando Rhodococcus Opacus Como Biorreagente

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