Mobilization of manganese by basalt associated Mn(II)-oxidizing bacteria from the Indian Ridge System

Sujith, P. P.; Mourya, Babu Shashikant; Krishnamurthi, S.; Meena, Ramavatar; Bharathi, P. A. Loka

doi:10.1016/j.chemosphere.2013.09.103

Cited by 22 publications

(8 citation statements)

References 62 publications

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“…Therefore, the possibility of BCS contaminating the guano was excluded and assumed that all bacterial species isolated from bat guano are autochthonous community. Such rock dwelling Staphylococcus has been associated with Manganese mobilization in basalt rocks34, hence, its high abundance in BCS is explained. While guano shared some bacterial genera with those observed in CW and CGS; the possibilities of these contaminating the guano was taken care during the sampling.…”

Section: Discussionmentioning

confidence: 96%

Microbiome analysis reveals the abundance of bacterial pathogens in Rousettus leschenaultii guano

Banskar

Bhute

Suryavanshi

et al. 2016

Sci Rep

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Bats are crucial for proper functioning of an ecosystem. They provide various important services to ecosystem and environment. While, bats are well-known carrier of pathogenic viruses, their possible role as a potential carrier of pathogenic bacteria is under-explored. Here, using culture-based approach, employing multiple bacteriological media, over thousand bacteria were cultivated and identified from Rousettus leschenaultii (a frugivorous bat species), the majority of which were from the family Enterobacteriaceae and putative pathogens. Next, pathogenic potential of most frequently cultivated component of microbiome i.e. Escherichia coli was assessed to identify its known pathotypes which revealed the presence of virulent factors in many cultivated E. coli isolates. Applying in-depth bacterial community analysis using high-throughput 16 S rRNA gene sequencing, a high inter-individual variation was observed among the studied guano samples. Interestingly, a higher diversity of bacterial communities was observed in decaying guano representative. The search against human pathogenic bacteria database at 97% identity, a small proportion of sequences were found associated to well-known human pathogens. The present study thus indicates that this bat species may carry potential bacterial pathogens and advice to study the effect of these pathogens on bats itself and the probable mode of transmission to humans and other animals.

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Section: Discussionmentioning

confidence: 96%

Microbiome analysis reveals the abundance of bacterial pathogens in Rousettus leschenaultii guano

Banskar

Bhute

Suryavanshi

et al. 2016

Sci Rep

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“…Bacillus species were majorly isolated, which formed 5 distinct clades . Bacillus is widely-reported from the CIOB and other parts of the Indian Ocean 9–13,16,17 , especially in PMNs and associated sediments. Further, four bacteria grouped within Oceanobacillus .…”

Section: Discussionmentioning

confidence: 99%

“…9 and Sujith et al . 17 reported “coryneforms” and Brevibacterium members from the nodules and basal fragments collected from the non-CIOB regions of the Indian Ocean, respectively (Supplementary Table S1).…”

Section: Discussionmentioning

confidence: 99%

Diversity and extracellular enzyme activities of heterotrophic bacteria from sediments of the Central Indian Ocean Basin

Gawas

Shivaramu

Damare

et al. 2019

Sci Rep

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Sedimentary bacteria play a role in polymetallic nodule formation and growth. There are, however, limited reports on bacterial diversity in nodule-rich areas of the Central Indian Ocean Basin (CIOB). In this study, bacterial abundance in thirteen sediment cores collected from the CIOB was enumerated, followed by phylogenetic characterisation and, screening of select heterotrophic bacteria for extracellular enzyme activities. Total bacterial counts (TBC) were in the order of 10 7 cells g −1 ; there was a significant difference (p > 0.05) among the cores but not within the sub-sections of the cores. The retrievable heterotrophic counts ranged from non-detectable to 5.33 × 10 5 g −1 ; the heterotrophic bacteria clustered within the phyla Firmicutes, Proteobacteria and Actinobacteria. Bacillus was the most abundant genus. The extracellular enzyme activities were in the order: amylase > lipase > protease > phosphatase > Dnase > urease. Major findings are compared with previous studies from the CIOB and other areas.

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“…In the literature, biological oxidation and removal capacities of Mn(II) from solution are reported extensively [73,[75][76][77][78][79][80][81][82][83][84][85][86][87][88][89] (Table 4). Biological removal of Mn has mainly been applied to the remediation of groundwater and artificial wastewater systems.…”

Section: Biological Treatment Of Mn(ii)mentioning

confidence: 99%

Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

et al. 2019

Water

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Many global mining activities release large amounts of acidic mine drainage with high levels of manganese (Mn) having potentially detrimental effects on the environment. This review provides a comprehensive assessment of the main implications and challenges of Mn(II) removal from mine drainage. We first present the sources of contamination from mineral processing, as well as the adverse effects of Mn on mining ecosystems. Then the comparison of several techniques to remove Mn(II) from wastewater, as well as an assessment of the challenges associated with precipitation, adsorption, and oxidation/filtration are provided. We also critically analyze remediation options with special emphasis on Mn-oxidizing bacteria (MnOB) and microalgae. Recent literature demonstrates that MnOB can efficiently oxidize dissolved Mn(II) to Mn(III, IV) through enzymatic catalysis. Microalgae can also accelerate Mn(II) oxidation through indirect oxidation by increasing solution pH and dissolved oxygen production during its growth. Microbial oxidation and the removal of Mn(II) have been effective in treating artificial wastewater and groundwater under neutral conditions with adequate oxygen. Compared to physicochemical techniques, the bioremediation of manganese mine drainage without the addition of chemical reagents is relatively inexpensive. However, wastewater from manganese mines is acidic and has low-levels of dissolved oxygen, which inhibit the oxidizing ability of MnOB. We propose an alternative treatment for manganese mine drainage that focuses on the synergistic interactions of Mn in wastewater with co-immobilized MnOB/microalgae.

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Mobilization of manganese by basalt associated Mn(II)-oxidizing bacteria from the Indian Ridge System

Cited by 22 publications

References 62 publications

Microbiome analysis reveals the abundance of bacterial pathogens in Rousettus leschenaultii guano

Microbiome analysis reveals the abundance of bacterial pathogens in Rousettus leschenaultii guano

Diversity and extracellular enzyme activities of heterotrophic bacteria from sediments of the Central Indian Ocean Basin

Removal of Manganese(II) from Acid Mine Wastewater: A Review of the Challenges and Opportunities with Special Emphasis on Mn-Oxidizing Bacteria and Microalgae

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