Indigenous microorganisms as potential bioremediators for environments contaminated with heavy metals

Colin, Verónica Leticia; Villegas, Liliana Beatriz; Abate, Carlos Mauricio

doi:10.1016/j.ibiod.2011.12.001

Cited by 111 publications

(45 citation statements)

References 67 publications

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“…These bacteria groups may have a great potential for the bioremediation of toxic chemicals. Indigenous microorganisms as potential bioremediators for environments contaminated with heavy metals were reported in the earlier studies (Colin et al 2012;Keshri et al 2014).…”

Section: Discussionmentioning

confidence: 80%

Effect of long-term industrial waste effluent pollution on soil enzyme activities and bacterial community composition

Subrahmanyam

Shen

Liu

et al. 2016

Environ Monit Assess

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Although numerous studies have addressed the influence of exogenous pollutants on microorganisms, the effect of long-term industrial waste effluent (IWE) pollution on the activity and diversity of soil bacteria was still unclear. Three soil samples characterized as uncontaminated (R1), moderately contaminated (R2), and highly contaminated (R3) receiving mixed organic and heavy metal pollutants for more than 20 years through IWE were collected along the Mahi River basin, Gujarat, western India. Basal soil respiration and in situ enzyme activities indicated an apparent deleterious effect of IWE on microbial activity and soil function. Community composition profiling of soil bacteria using 16S rRNA gene amplification and denaturing gradient gel electrophoresis (DGGE) method indicated an apparent bacterial community shift in the IWE-affected soils. Cloning and sequencing of DGGE bands revealed that the dominated bacterial phyla in polluted soil were affiliated with Firmicutes, Acidobacteria, and Actinobacteria, indicating that these bacterial phyla may have a high tolerance to pollutants. We suggested that specific bacterial phyla along with soil enzyme activities could be used as relevant biological indicators for longterm pollution assessment on soil quality.

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Section: Discussionmentioning

confidence: 80%

Effect of long-term industrial waste effluent pollution on soil enzyme activities and bacterial community composition

Subrahmanyam

Shen

Liu

et al. 2016

Environ Monit Assess

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“…Definitions suggested by many authors based on physicochemical concepts do not make logical sense because of the lack of connection between those physicochemical properties and density, toxicity or ecotoxicity (Colin et al, 2012). Selenium and arsenic, regarded as semi metals or metalloids have often been included also in the group of heavy metals because of their toxicity, having physical properties similar to metals but chemical behavior similar to non-metals (Duffus, 2002).…”

Section: Actinobacteria and Metalsmentioning

confidence: 99%

“…Another advantage of using microbes is that they do not produce toxic intermediates when degrading pollutants. Heavy metals biodegradation may involve myriads of mechanisms such as active transport through efflux pumps, transformation to less toxic chemical compounds using enzymatic transformations via redox reactions (intracellular sequestration), methylation and alkylation/ dealkylation (Colin et al, 2012).…”

Section: Actinobacteria and Metalsmentioning

confidence: 99%

Actinobacteria Isolation from Metal Contaminated Soils for Assessment of their Metal Resistance and Plant Growth Promoting (PGP) Characteristics

Tekaya¹,

Tipayno

Chandrasekaran³

et al. 2012

Korean Journal of Soil Science and Fertilizer

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Heavy metals and metalloids removal can be considered as one of the most important world challenges because of their toxicity and direct impact on human health. Many processes have been introduced but biological processes of remediation seem to offer the most suitable solution in terms of efficiency and low cost. Actinobacteria constitute one of the major microbial populations in soil, and this can be attributed to their adaptive morphological structure as well as their exceptional metabolic power. Among microbes, actinobacteria are morphologic intermediate between fungi and bacteria. Studies on microbial diversities in metal contaminated lands have shown that actinobacteria may constitute a dominantly active microbiota in addition to α Proteobacteria. Furthermore, isolation studies have shown metal removal mechanisms which are reminiscent of notable multiresistant strains, such as Cupriavidus metallidurans. Apart from members of genus Streptomyces, which produce more than 90% of commercialized antibiotics, and the nitrogen fixing Frankia, little attention has been given to other members of this phylum. This is because of difficult culture condition requirements and maintenance. In this review, we focused on specific isolation of actinobacteria and their potential applications in metal bioremediation and plant growth promotion.

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“…Chromium especially the hexavalent form is very toxic [3], hence industrial wastes containing chromium are usually treated before discharge. Physical and chemical technology methods are the conventional means of removing chromium from wastes, but the cost is often unbearable for the low-income countries.…”

Section: Introductionmentioning

confidence: 99%

Removal of Cr (VI) from Tannery Effluent and Aqueous Solution by Sequential Treatment with Microfungi and Basidiomycete-Degraded Sawdust

Ejechi¹,

Akpomie²

2016

JEP

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Removal of Cr (VI) from aqueous solution and tannery effluent in sequence with Cr (VI) resistant microfungi (Aspergillus niger, Penicillium chrysogenum) and sawdust degraded by basidiomycete (Gloeophyllum sepiarium) was investigated in the laboratory. Initial or primary treatment with microfungi reduced 200 mg/l Cr (VI) in aqueous solution by 64.6% -78.2% while a markedly lower 0.52 mg/l Cr (VI) in tannery effluent was reduced by 72.4% -84.6%. However, the residual Cr (VI) in both aqueous solution and tannery effluent was reduced to a non-detectable level after secondary treatment by passage through basidiomycete-degraded sawdust column. The recovery of 65.4% -87.7% of the Cr (VI) removed by treatment microfungi by elution indicated adsorption as the major mechanism for Cr (VI) removal. The microfungi reduced BOD in tannery effluent by 85.3 ± 5.6 -92.7 ± 6.8 and concomitantly removed Cr (VI), hence it is hypothesized that non-Cr (VI) constituents of tannery effluent may have interfered with biosorption of Cr (VI) by treatment microfungi. It is concluded that the two-stage sequential treatment process may be of potential cost-saving stratagem for removal of chromium from industrial wastes.

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Indigenous microorganisms as potential bioremediators for environments contaminated with heavy metals

Cited by 111 publications

References 67 publications

Effect of long-term industrial waste effluent pollution on soil enzyme activities and bacterial community composition

Effect of long-term industrial waste effluent pollution on soil enzyme activities and bacterial community composition

Actinobacteria Isolation from Metal Contaminated Soils for Assessment of their Metal Resistance and Plant Growth Promoting (PGP) Characteristics

Removal of Cr (VI) from Tannery Effluent and Aqueous Solution by Sequential Treatment with Microfungi and Basidiomycete-Degraded Sawdust

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