Bioremediation of Heavy Metals by Microbes

Choudhary, Madhu; Kumar, Raman; Datta, Ashim; Nehra, Vibha; Garg, Neelam

doi:10.1007/978-3-319-48257-6_12

Cited by 30 publications

(19 citation statements)

References 100 publications

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“…Biomass has been shown to be as efficient as many ion exchange resins for this type of removal. The process can be employed to concentrate and recovering metals, primarily from water solutions 69,70,71,72 . Selected microorganisms through oxidation or reduction of metals remediate various types of metal contaminates in surrounding environment.…”

Section: Biological Treatment Technologies For Metals Remediationmentioning

confidence: 99%

“…Selected microorganisms through oxidation or reduction of metals remediate various types of metal contaminates in surrounding environment. The redox reactions can accomplished directly by the organism or may be as a consequence of a reducing agents released by them 69,70,71,72 . Biological methylation refers to the process in which organisms attach a methyl group (-CH 3 ) to an inorganic form of metal.…”

Section: Biological Treatment Technologies For Metals Remediationmentioning

confidence: 99%

“…Methylation directly affects the mobility of the metal. Among metals known to be methylated or demethylated by microorganisms are mercury, arsenic, cadmium, and lead 69,70,71,72 . Biosorption refers to the process of being taken up or hold by either adsorption or absorption of a molecule by an organism.…”

Section: Biological Treatment Technologies For Metals Remediationmentioning

confidence: 99%

See 2 more Smart Citations

Recent Progress in Metal-Microbe Interactions: Prospects in Bioremediation

Abulreesh¹,

Elbanna²,

Shaaban³

et al. 2019

J Pure Appl Microbiol

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Heavy metal contamination due to natural and anthropogenic source is a major environmental problem. Release of metal from use of agrochemicals, industrial effluents and wastewater residues and their accumulation in food causes serious dilemma to animal and human health concern. On the other hand microbial population gets affected from metal toxicity at elevated concentration. With the result microbes develops various resistance mechanism to cope with metal toxicity. Both physiological and genetic mechanisms are involved in developing such resistance. Recent advances on metal-bacteria interaction has led to better understanding of metal accumulation/detoxification or biotransformation and bioremediation of metals through application of such bacteria. Role of various transport protein families involved in heavy metal metabolism are now explored. this article provides insights of metalbacteria interaction in terms of resistance mechanisms and role of various transport proteins and its potential application in bioremediation of metal pollution.

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Section: Biological Treatment Technologies For Metals Remediationmentioning

confidence: 99%

Section: Biological Treatment Technologies For Metals Remediationmentioning

confidence: 99%

Section: Biological Treatment Technologies For Metals Remediationmentioning

confidence: 99%

See 1 more Smart Citation

Recent Progress in Metal-Microbe Interactions: Prospects in Bioremediation

Abulreesh¹,

Elbanna²,

Shaaban³

et al. 2019

J Pure Appl Microbiol

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“…2. A diagram shows the composition of the fixed bed bioreactor which is composed of a glass column packed with luffa pulp as a solid supporter (1) and connected to a hot plate with a magnetic stirrer (2), a peristaltic pump (3), an air pump (4), two air filters (5), and a conical reservoir which contains the heavy metal contaminated wastewater sample (6). All connections were made using flexible hoses metal residue concentration (ppm)/the average initial heavy metal concentration (ppm) × 100%…”

Section: Cultivation In a Fixed Bed Bioreactormentioning

confidence: 99%

“…Moreover, fertilizer and leather tanning industries in addition to some natural processes are one of the sources of these toxic metals accumulating into the environment. Adsorption is a highly effective technique for the heavy metal removal from wastewaters and the activated carbon remains the best packing material widely used as a heavy metal adsorbent regardless of its cost [5,8].…”

Section: Introductionmentioning

confidence: 99%

Heavy metal removal using a fixed bed bioreactor packed with a solid supporter

Ibrahim

Hamdona

El-Naggar

et al. 2019

Beni-Suef Univ J Basic Appl Sci

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Background: Different bacterial isolates were obtained from a much-polluted lake (Lake Mariout) in Alexandria, Egypt. They were tested to bio-remove different heavy metal ions (Cu 2+ , Pb 2+ , Cd 2+ , Co 2+ , Ni 2+ , Zn 2+ , Mn 2+ , and Fe 3+ ). In addition, this study was aimed to create a fixed bed column to enhance the metal removal from some polluted wastewater samples. Results: The potent bacterium was selected and identified as Pseudomonas aeruginosa using the 16SrRNA gene sequence. The effect of some physicochemical parameters on the bio-removal process was studied in batch cultures; it was found the efficiency % of metal removal was increased on using pH 7.5 and bacterial biomass of 750 mg/l. Also, the use of the fixed bed column led to an increase in the removal efficiency % to 100% for the Cu 2+ , Zn 2+ , and Cd 2+ ions and decrease the consuming time from 48 to 24 h under using the optimum incubation conditions, while the removal of Fe 3+ and Pb 2+ showed 62% and 47%, respectively, with a 20% increase compared to the batch system. Conclusion:It was confirmed the use of fixed bed bioreactors was able to increase the efficiency towards the metal removal in polluted environmental samples while decreasing the exhaustion time. Also, Pseudomonas sp. showed great ability to get rid of many harmful health hazard substances.

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Expression regulation of chitin‐binding protein and metal‐binding peptide in new Bacillus velezensis: MALDI‐TOF MS/MS analysis

Etemadzadeh

Emtiazi

2021

J Basic Microbiol

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Metallothionein and metal‐binding peptides are small cysteine‐rich proteins produced by different organisms in stress conditions. In this study, the metal‐binding peptide was detected in extracellular proteins of a new Bacillus velezensis strain, isolated from metal contaminated soil, and grown on the lead‐enriched medium, for the first time. The presence of sulfide peptide was assayed by two simple tests (lead sulfide and Ellman's reagent test) for preliminary, and subsequently confirmed using polyacrylamide gel electrophoresis at media with different lead concentrations that the low‐molecular‐weight protein fragments (≈10 kDa) were observed while none were detected in the medium containing sodium chloride or calcium salt. The amino acids of the observed fragments were analyzed by matrix‐assisted laser desorption ionization time‐of‐flight tandem mass spectrometry (MALDI‐TOF MS/MS). Also, the metal adsorption was confirmed using sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS‐PAGE) by staining with chromium solution. The results showed that the putative sulfide peptide is metallothionein, which is induced in stress conditions. It was interesting that in all SDS profiles, one protein fragment (≈18 kDa) was inhibited in lead‐enriched media. The data from MALDI‐TOF MS/MS analysis showed that this fraction was a chitin‐binding protein whose production was regulated by metal contamination. It is anticipated that these two proteins regulate the toxicity of lead.

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Bioremediation of Heavy Metals by Microbes

Cited by 30 publications

References 100 publications

Recent Progress in Metal-Microbe Interactions: Prospects in Bioremediation

Recent Progress in Metal-Microbe Interactions: Prospects in Bioremediation

Heavy metal removal using a fixed bed bioreactor packed with a solid supporter

Expression regulation of chitin‐binding protein and metal‐binding peptide in new Bacillus velezensis: MALDI‐TOF MS/MS analysis

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