Screening of Copper Tolerant Bacterial Strains and Their Potential to Remove Copper from the Environment

Ahmed, Nuzhat; Nawaz, Aisha; Badar, Uzma

doi:10.1007/s00128-004-0573-z

Cited by 18 publications

(7 citation statements)

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“…), metalpercolated ultramafic ecosystem of Andaman, India (Pal and Paul 2010). Bacteria exposed to a high level of heavy metals have adapted to this stress by employing various resistant mechanism (Ahmed et al 2005). It is shown in this study that copper resistance mechanism in isolates IrC1, IrC2, and IrC4 involves accumulation of this metal especially on the membrane fraction and restricts amount of copper inside the cytoplasm.…”

Section: Discussionmentioning

confidence: 87%

Molecular and Physiological Characterization of Copper-Resistant Bacteria Isolated from Activated Sludge in an Industrial Wastewater Treatment Plant in Rungkut-Surabaya, Indonesia

et al. 2012

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Copper resistant bacteria can be isolated from environments where copper levels are abundant from mining, industrial, or agricultural activities. The aim of this work was to study the molecular and physiologicalcharacteristics of indigenous copper resistant bacteria isolated from activated sludge in an industrial wastewatertreatment plant in Surabaya, Indonesia. The bacterial isolates were designated as strains IrC1, IrC2, and IrC4. Phylogenetic analysis based on 16S rDNA sequence analysis identified isolates IrC1, IrC2, and IrC4 as Acinetobacter oleivorans (98.41% similarity), Acinetobacter pitii (97.22% similarity), and Cupriavidus pauculus (96.99 similarity), respectively. The addition of 5 mM of CuSO4 in the medium affected morphological 4 appearance of all isolates to green and undulate margin might be due to the survival mechanism of bacteria by absorbing the copper. This studies indicated that copper resistance mechanism of all isolates was facilitated through the bioaccumulation of copper inside the cell, especially on the membrane fraction and inside the cytoplasm, albeit at a limited amount. It was observed that isolates IrC1, IrC2, and IrC4 were capable of accumulating 137.23 , 364.66 , and 272.07 mg L-1 of copper, respectively from the medium containing 8 mM CuSO4. The capability of isolates IrC1, IrC2, and IrC4 to accumulate copper can be exploited in bioremediation 4 process for removing copper from industrial sewage

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Section: Discussionmentioning

confidence: 87%

Molecular and Physiological Characterization of Copper-Resistant Bacteria Isolated from Activated Sludge in an Industrial Wastewater Treatment Plant in Rungkut-Surabaya, Indonesia

et al. 2012

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“…Manganese source was added from a concentrated anoxic sterile stock solution to achieve a final concentration and incubated at 30°C. A concentrated soluble sterile Mn(II) stock solution was prepared by adding MnCl 2 to anoxic distilled deionized water and sealed with a blue butyl stopper under an anoxic atmosphere (Ahmed et al, 2005).…”

Section: Screening Of Anaerobic Deniterfiersmentioning

confidence: 99%

Simultaneous Removal of Mn(II) and Nitrate by the Manganese-Oxidizing Bacterium Acinetobacter sp. SZ28 in Anaerobic Conditions

Zheng

Huang

et al. 2016

Geomicrobiology Journal

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A novel bacterium, strain SZ28, identified as Acinetobacter sp., showed anaerobic denitrification ability using Mn(II) as the electron donor. Nitrate-nitrogen concentration decreased from nearly 16.52 mg L -1 to 4.4 mg L -1 , without accumulation of nitrite as an intermediate, with a maximum of 0.063 mg NO 3 --N L -1 h -1 , reaching a peak of 0.085 mg NO 3 --N L -1 h -1 in sodium acetate. The nitrate removal rate reached 0.067 mg NO 3 --N L -1 h -1 , 0.059 mg NO 3 --N L -1 h -1 , and 0.078mg NO 3 --N L -1 h -1 using Mn(II), S(II), and Fe(II) as electron donors, respectively. The optimum pH was 6.0, with a removal rate of 0.063 mg NO 3 --N L -1 h -1 .

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“…Uncontaminated sites were also selected to evaluate the tolerable limits of heavy metals of common soil bacteria. Bacteria exposed to high levels of heavy metals in their environment have adapted to this stress by developing various resistance mechanisms which could be utilized for detoxification and removal of heavy metals from polluted environment 17 . However, the ability of microorganisms to grow in the presence of relatively high metal ion concentrations is found in a wide range of microbial groups and species, including those from non-polluted sites and not in all cases is any adaptation necessary 18 .…”

Section: Discussionmentioning

confidence: 99%

Bacterial Tolerance to Heavy Metal Contents Present in Contaminated and Uncontaminated Soils

Tanu

Hoque

2016

Bangla. J. Microbiol.

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Present study dealt with identification of some heavy metal tolerant bacteria from contaminated industrial soils of Dhaka Export Processing Zone (DEPZ) at Savar, tannery area at Hazaribagh and uncontaminated agricultural soils of Dhamrai and Kushtia in Bangladesh and determination of their tolerance to chromium (Cr6+) and cadmium (Cd2+). A total of 15 isolates from four soil samples were provisionally identified as different species of Bacillus, Micrococcus and Pseudomonas based on their morphological, physiological, and biochemical characteristics. Among them eight colonies were separated based on high level of heavy metal tolerance and identified at molecular level by PCR technique and 16S rRNA gene sequencing as Micrococcus luteus strain P43 (E4), Bacillus pocheonensis strain TR2-6 (T6), Bacillus megaterium strain H2 (T8), Bacillus amyloliquefaciens strain SCSAAB0007 (D10), Bacillus cereus isolate PGBw4 (D11), Bacillus cereus strain ES-4a1 (K12), Bacillus subtilis strain 1320, (K13), and Bacillus subtilis strain DP14 (K14). The Maximum Tolerable Concentration (MTC) of bacterial strains to Cr6+ and Cd2+ ranged between 250-1250 ?g/ml and 30-150 ?g/ml, respectively in nutrient broth medium. From the metal tolerance investigation Bacillus was found as the most heavy metal tolerant to both Cr6+ and Cd2+ among the three genera. The identified heavy metal tolerant bacteria could be useful for the bioremediation of heavy metal contaminated environment.Bangladesh J Microbiol, Volume 29, Number 2, Dec 2012, pp 56-61

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Screening of Copper Tolerant Bacterial Strains and Their Potential to Remove Copper from the Environment

Cited by 18 publications

References 0 publications

Molecular and Physiological Characterization of Copper-Resistant Bacteria Isolated from Activated Sludge in an Industrial Wastewater Treatment Plant in Rungkut-Surabaya, Indonesia

Molecular and Physiological Characterization of Copper-Resistant Bacteria Isolated from Activated Sludge in an Industrial Wastewater Treatment Plant in Rungkut-Surabaya, Indonesia

Simultaneous Removal of Mn(II) and Nitrate by the Manganese-Oxidizing Bacterium Acinetobacter sp. SZ28 in Anaerobic Conditions

Bacterial Tolerance to Heavy Metal Contents Present in Contaminated and Uncontaminated Soils

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