Microbial communities and biogenic Mn-oxides in an on-site biofiltration system for cold Fe-(II)- and Mn(II)-rich groundwater treatment

Dangeti, Sandeepraja; McBeth, Joyce; Roshani, Babak; Vyskocil, Jonathan M.; Rindall, Brian; Chang, Wonjae

doi:10.1016/j.scitotenv.2019.136386

Cited by 39 publications

(12 citation statements)

References 53 publications

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“…The presence of large deposits along the fibers of the filters were attributed to the presence of reaction byproducts. Such deposition during biofilter operation have been reported previously for similar systems [60,61]. FreeNA and ILNA exhibited a considerably lower concentration of the byproducts along the cotton fibers after decolorization (Figure 7e,f).…”

Section: Discussionsupporting

confidence: 86%

Congo Red Decolorization Using Textile Filters and Laccase-Based Nanocomposites in Continuous Flow Bioreactors

et al. 2020

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Removal of azo and diazo dye content from textile industry wastewaters is crucial due to their environmental impact. Here, we report on the use of the fungal laccase from Pycnoporus sanguineus CS43 immobilized on silica nanoparticles and entrapped in textile-based filters for the degradation of Congo Red. Laccase immobilization and synthesis of the nanocomposites were carried out by two different methods, one in the presence of acetone and the second using water as solvent. This led to a change in the hydrophobicity of the obtained biofilters. Successful preparation of the nanocomposites was confirmed via FTIR spectroscopy. Changes in the secondary structure of the enzyme were inspected through the second derivative of the FTIR spectra. Six different types of filter were fabricated and tested in a continuous flow bioreactor in terms of their decolorization capabilities of Congo Red. The results indicate removal efficiencies that approached 40% for enzymes immobilized on the more hydrophobic supports. Backscattered electron (BSE) images of the different filters were obtained before and after the decolorization process. Percentage of decolorization and activity loss were determined as a function of time until a plateau in decolorization activity was reached. Experimental data was used to recreate the decolorization process in COMSOL Multiphysics® (Stockholm, Sweden). These simulations were used to determine the proper combination of parameters to maximize decolorization. Our findings suggest that the treatment of textile-based filters with immobilized laccase in conjunction with hydrophobic nanocomposites provides a suitable avenue to achieve more efficient laccase dye decolorization (39%) than that obtained with similar filters treated only with free laccase (8%). Filters treated with silica-based nanocomposites and immobilized laccases showed an increase in their decolorization capability, probably due to changes in their wetting phenomena.

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Section: Discussionsupporting

confidence: 86%

Congo Red Decolorization Using Textile Filters and Laccase-Based Nanocomposites in Continuous Flow Bioreactors

et al. 2020

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“…63,66 Co-removal of Mn and NH 3 has been observed extensively in groundwater biofilters which include Nitrospira and Candidatus Nitrotoga , the two NOB genera observed in this study. 58,67,68 Surface water filters which support the growth of Nitrospira have also been shown to remove both Mn and NH 3 . 26…”

Section: Resultsmentioning

confidence: 99%

“…2A). 9,13,[47][48][49][50][51][52][53][54][55][56][57][58][59] Leptothrix was not detected in the filter media biofilm of either the M-GW/SW or W-GW treatment plants, however, 11 other genera which contain potential MnOB were identified (Fig. 2B).…”

Section: Biological Characterization Of Source Water Quality and Filt...mentioning

confidence: 99%

“…2B). 9,13,47,49,51,52,54,57,58 Several potential MnOB were present in the filter media communities of both the M-GW/SW and W-GW water treatment plants including Crenothrix, Hyphomicrobium, Legionella, Reyranella, and Sphingomonas. 9,13,54,57 It is difficult to know the composition of the filter media community in the S-GW water treatment plant due to the insufficient read depth of these samples.…”

Section: Biological Characterization Of Source Water Quality and Filt...mentioning

confidence: 99%

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Understanding the impact of different source water types on the biofilm characteristics and microbial communities of manganese removing biofilters

McCormick

Earle

Stoddart

et al. 2023

Environ. Sci.: Water Res. Technol.

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“…Hydrogenophaga spp. have been identified as important members of microbial communities associated with Mn oxidation in drinking water systems [33], and biofilters [34], while species belonging to the Rhizobium genus have been associated with Mn oxidation in subsurface deposits [35]. Fungi that belong to the Cladosporium genus have been associated with Mn oxidation in metal-rich mine environments [35,36] and with sequestration of Mn inside hyphal cells [37].…”

Section: Isolated Mn-oxidizing Microorganismsmentioning

confidence: 99%

Microbe-Mediated Mn Oxidation—A Proposed Model of Mineral Formation

Sjöberg

Stairs

et al. 2021

Minerals

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Manganese oxides occur in a wide range of environmental settings either as coatings on rocks, sediment, and soil particles, or as discrete grains. Although the production of biologically mediated Mn oxides is well established, relatively little is known about microbial-specific strategies for utilizing Mn in the environment and how these affect the morphology, structure, and chemistry of associated mineralizations. Defining such strategies and characterizing the associated mineral properties would contribute to a better understanding of their impact on the local environment and possibly facilitate evaluation of biogenicity in recent and past Mn accumulations. Here, we supplement field data from a Mn rock wall deposit in the Ytterby mine, Sweden, with data retrieved from culturing Mn oxidizers isolated from this site. Microscopic and spectroscopic techniques are used to characterize field site products and Mn precipitates generated by four isolated bacteria (Hydrogenophaga sp., Pedobacter sp., Rhizobium sp., and Nevskia sp.) and one fungal-bacterial co-culture (Cladosporium sp.—Hydrogenophaga sp. Rhizobium sp.—Nevskia sp.). Two of the isolates (Pedobacter sp. and Nevskia sp.) are previously unknown Mn oxidizers. At the field site, the onset of Mn oxide mineralization typically occurs in areas associated with globular wad-like particles and microbial traces. The particles serve as building blocks in the majority of the microstructures, either forming the base for further growth into laminated dendrites-botryoids or added as components to an existing structure. The most common nanoscale structures are networks of Mn oxide sheets structurally related to birnessite. The sheets are typically constructed of very few layers and elongated along the octahedral chains. In places, the sheets bend and curl under to give a scroll-like appearance. Culturing experiments show that growth conditions (biofilm or planktonic) affect the ability to oxidize Mn and that taxonomic affiliation influences crystallite size, structure, and average oxidation state as well as the onset location of Mn precipitation.

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Microbial communities and biogenic Mn-oxides in an on-site biofiltration system for cold Fe-(II)- and Mn(II)-rich groundwater treatment

Cited by 39 publications

References 53 publications

Congo Red Decolorization Using Textile Filters and Laccase-Based Nanocomposites in Continuous Flow Bioreactors

Congo Red Decolorization Using Textile Filters and Laccase-Based Nanocomposites in Continuous Flow Bioreactors

Understanding the impact of different source water types on the biofilm characteristics and microbial communities of manganese removing biofilters

Microbe-Mediated Mn Oxidation—A Proposed Model of Mineral Formation

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