Biosorption of hexavalent chromium by Termitomyces clypeatus biomass: Kinetics and transmission electron microscopic study

Das, Sujoy; Guha, Arun K.

doi:10.1016/j.jhazmat.2009.01.037

Cited by 53 publications

(31 citation statements)

References 48 publications

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“…Shen and Wang (1993) also reported a stimulation of Cr 6+ reduction by 2,4-DNP in intact cells of E. coli ATCC 33456. However, contrary to these results, Das and Guha (2009) observed significantly reduced uptake of Cr 6+ by Termitomyces clypeatus in the presence of 2,4-DNP, while nickel ion transport was reported to be inhibited in Rhodospirillum rubrum by 2,4-DNP (Watt and Ludden 1999).…”

Section: Discussionmentioning

confidence: 75%

Toxic chromate reduction by resistant and sensitive bacteria isolated from tannery effluent contaminated soil

Alam

Ahmad

2011

Ann Microbiol

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Bacterial strains ZA-6, W-61, KS-2 and KS-14 were isolated from agricultural soil irrigated with tannery effluents and subsequently identified by 16S rDNA sequencing as Stenotrophomonas maltophilia, Staphylococcus gallinarum, Pantoea sp. and Aeromonas sp., respectively. All isolates were examined for their resistance to hexavalent chromium and other heavy metal ions. The bacterial isolate S. maltophilia ZA-6 and S. gallinarum W-61 were resistant to 16.5 and 12.4 mM of potassium chromate, respectively, whereas Pantoea sp. KS-2 and Aeromonas sp. KS-14 were found to be sensitive to potassium chromate. S. maltophilia ZA-6 and S. gallinarum W-61 completely reduced 500 μM Cr 6+ to Cr 3+ within 56 h, while chromate-sensitive isolates Pantoea sp. KS-2 and Aeromonas sp. KS-14 exhibited poor chromate-reducing activity. Chromate reduction was severely affected in the presence of the metabolic inhibitors sodium cyanide and sodium azide. Sodium cyanide completely inhibited chromate reduction in each isolate, whereas 1 mM sodium azide and 10 mM sodium sulfate affected the inhibition of chromate reduction to varying degrees. The use of 1 mM 2,4-dinitrophenol, an uncoupling agent, stimulated the chromate reduction. The cell-free extract (CFE) of chromateresistant isolates readily reduced Cr 6+ to Cr 3+ , with that of S. gallinarum W-61 showing a K m value of 121.7 μM chromate and a V max of 1.12 μmol/min per milligram protein in the presence of NADH. The chromate-resistant isolates displayed lower Michealis-Menton constant (K m ) values and higher maximum velocity (V max ) than chromatesensitive isolates. These results suggest that chromate resistance and reduction in these bacteria are related.

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Section: Discussionmentioning

confidence: 75%

Toxic chromate reduction by resistant and sensitive bacteria isolated from tannery effluent contaminated soil

Alam

Ahmad

2011

Ann Microbiol

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“…6E), which indicates a main strategy for mycorrhizal roots to tolerate Cr(VI). Similar to extraradical mycelium mentioned above, Cr(VI) was possibly reduced by electron-donor compounds or chromate reductase in both fungal structures or plant cells [27,51,61]. Cr(III) is easily bound to phosphate, carboxyl or thiol groups, resulting in lower mobility and toxicity [27].…”

Section: Cellular Imaging and Speciation Of Cr In Resin Sections Of Mmentioning

confidence: 81%

Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses

Zhang

Sun

et al. 2016

Journal of Hazardous Materials

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“…In this experiment, SO 4 2− may be a competitive ion for the uptake of CrO 4 2− , because the Cr (VI)-reduction rate decreased correspondingly. Das and Guha [35] also reported that the uptake of chromium by live biomass was reduced in presence of sulfate ion. The existence of NO 3 − also decreased the Cr (VI)-reduction rate but the mechanism may be different from SO 4 2− , because NO 3 − could act as another competing electron acceptor, similar to oxygen [31].…”

Section: Effect Of Cr (Vi) Concentrationsmentioning

confidence: 90%

Reduction of hexavalent chromium by Pannonibacter phragmitetus LSSE-09 stimulated with external electron donors under alkaline conditions

Luo

et al. 2011

Journal of Hazardous Materials

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Biosorption of hexavalent chromium by Termitomyces clypeatus biomass: Kinetics and transmission electron microscopic study

Cited by 53 publications

References 48 publications

Toxic chromate reduction by resistant and sensitive bacteria isolated from tannery effluent contaminated soil

Toxic chromate reduction by resistant and sensitive bacteria isolated from tannery effluent contaminated soil

Chromium immobilization by extra- and intraradical fungal structures of arbuscular mycorrhizal symbioses

Reduction of hexavalent chromium by Pannonibacter phragmitetus LSSE-09 stimulated with external electron donors under alkaline conditions

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