Bacterial sorption of heavy metals

Mullen, Michael D.; Wolf, D. C.; Ferris, F. G.; Beveridge, Terry J.; Flemming, Cecily A.; Bailey, George W.

doi:10.1128/aem.55.12.3143-3149.1989

Cited by 443 publications

(112 citation statements)

References 29 publications

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“…The uptake of dissolved iron on the surfaces of microorganisms is well known (Mullen et al 1989). Konhauser et al ( 1993) have reported that metallic ions of solute-rich fluviatile waters become bound to the acidic polysaccharide capsules of bacteria.…”

Section: Discussionmentioning

confidence: 99%

Lingulid shell mediation in clay formation

Williams

Cusack

1996

LET

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Organophosphatic shells of the brachiopod Lingula squarniformis, collected from Scottish Lower Carboniferous shales and mudstones of intertidal to sublittoral provenance, have been studied to ascertain chemico‐structural changes resulting from fossilization. Enough original shell has been preserved at ultrastructural and molecular levels to confirm that Carboniferous and Recent integuments are homologous with stratiform successions of apatitic to organic laminae forming rhythmic sets. One of the main organic constituents, the acidic, hydrophilic gel glycosaminoglycans (GAGs), is the dominant component towards the tops of rhythms. During fossilization of the Carboniferous shells, GAGs degraded incrementally without disturbing apatitic ultrastructures, and the spaces so created became partly filled with sheets of recrystal‐lized apatite with some kaolinite or with books and plates of kaolinite. The kaolinite in the shells contrasts with the illite of the entombing sediments and suggests that degrading acidic GAGs mediated in clay formation in situ. The sediments also contain framboidal pyrite, which is virtually absent from the shells themselves but is usually even more abundant, with a greater range of trace metals, in the sedimentary fills of complete shells. This imbalance suggests mediation by another gel, the glycocalyx, secreted by the inner epithelium of the brachiopod mantle. The glycocalyx would have lined the shell interior and could have served as a sorption film for dissolved metals precipitated as compounds on decomposition of body tissue.

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Section: Discussionmentioning

confidence: 99%

Lingulid shell mediation in clay formation

Williams

Cusack

1996

LET

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“…Biosorption is a process which represents a cost-effective, as well as an ecofriendly, tool for removing heavy metals using biological material (Gadd, 2009). Several microbial sources, such as algae (Filip et al, 1979), bacteria (Mullen et al, 1989), yeast (Machado et al, 2008), and fungi (Kapoor et al, 1999) have been used by scientists across the world for biosorption experiments. Among the various microbial populations, bacterial biomass has been found to be the most significant in metal biosorption, and hence, the use of bacteria for removal/detoxification of heavy metals has received considerable attention in recent years (Oves et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Heavy Metals from Aqueous Solution by Bacteria Isolated from Contaminated Soil

Dhanwal

Kumar

Dudeja

et al. 2018

Water Environment Research

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This study was carried out to analyze the heavy metals biosorption potential of bacteria isolated from soil contaminated with electroplating industrial effluents. Bacterial isolates were screened for their multi-metal biosorption potential against copper, nickel, lead, and chromium. Bacterial isolate CU4A showed the maximum uptake of copper, nickel, lead, and chromium in aqueous solution, with a biosorption efficiency of 87.16 %, 79.62%, 84.92%, and 68.12%, respectively. The bacterial strain CU4A was identified as Bacillus cereus, following 16S rRNA gene sequence analysis. The surface chemical functional groups of bacterial biomass were identified by Fourier transform infrared (FTIR) spectroscopy as hydroxyl, carboxyl, amine, and halide, which may be involved in the biosorption of heavy metals. Analysis with scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) confirmed the adsorption of metals on the bacterial cell mass. The results of this study are significant and could be further investigated for the removal of heavy metals from contaminated environments.

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“…Bacterial cell walls can adsorb a wide range of aqueous metal cations, potentially altering the mobility of the metals in geologic systems (e.g., Beveridge & Murray, 1976, 1980Beveridge & Koval, 1981;Crist et al ., 1981;Harvey & Leckie, 1985;Goncalves et al ., 1987). Most previous studies of bacterial surface adsorption have involved bacterial cells that were not metabolically active during the period of adsorption, focusing on the passive binding that occurs between bacterial surface functional groups and aqueous metal cations (e.g., Mullen et al ., 1989;Fein et al ., 1997;Haas et al ., 2001;Ngwenya et al ., 2003). Metal cations appear to bind predominantly to deprotonated sites within the bacterial cell wall.…”

Section: Introductionmentioning

confidence: 99%

The impact of metabolic state on Cd adsorption onto bacterial cells

Johnson¹,

A²,

Wedel³

et al. 2007

Geobiology

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This study examines the effect of bacterial metabolism on the adsorption of Cd onto Gram‐positive and Gram‐negative bacterial cells. Metabolically active Gram‐positive cells adsorbed significantly less Cd than non‐metabolizing cells. Gram‐negative cells, however, showed no systematic difference in Cd adsorption between metabolizing and non‐metabolizing cells. The effect of metabolism on Cd adsorption to Gram‐positive cells was likely due to an influx of protons in and around the cell wall from the metabolic proton motive force, promoting competition between Cd and protons for adsorption sites on the cell wall. The relative lack of a metabolic effect on Cd adsorption onto Gram‐negative compared to Gram‐positive cells suggests that Cd binding in Gram‐negative cells is focused in a region of the cell wall that is not reached, or is unaffected by this proton flux. Thermodynamic modeling was used to estimate that proton pumping causes the pH in the cell wall of metabolizing Gram‐positive bacteria to decrease from the bulk solution value of 7.0 to approximately 5.7.

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Bacterial sorption of heavy metals

Cited by 443 publications

References 29 publications

Lingulid shell mediation in clay formation

Lingulid shell mediation in clay formation

Biosorption of Heavy Metals from Aqueous Solution by Bacteria Isolated from Contaminated Soil

The impact of metabolic state on Cd adsorption onto bacterial cells

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