Heavy metal resistance of marine bacteria on the sediments of the Black Sea

Kalkan, Samet

doi:10.1016/j.marpolbul.2022.113652

Cited by 13 publications

(6 citation statements)

References 63 publications

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“…Specifically, 64 microorganisms were completely inhibited by cadmium, while only nine were affected by all evaluated levels of Pb and Zn. Higher toxicity of cadmium compared to other heavy metals has been previously reported for several marinederived microorganisms [70][71][72]. Authors argued that the ability of bacteria to tolerate different concentrations of heavy metals depends on many factors, including their taxonomic genus, metabolic abilities, growth conditions, and growth phase [73].…”

Section: Discussionmentioning

confidence: 96%

Heavy Metal Tolerance of Microorganisms Isolated from Coastal Marine Sediments and Their Lead Removal Potential

Alvarado-Campo,

Quintero,

Cuadrado-Cano

et al. 2023

Microorganisms

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In this study, 338 microorganisms, comprising 271 bacteria and 67 fungi, were isolated from sediment samples collected from underexplored Pacific and Caribbean regions of Colombia. Screening trials were conducted on selected strains (n = 276) to assess their tolerance to cadmium (Cd2+), lead (Pb2+), and zinc (Zn2+), leading to the identification of six bacteria capable of withstanding 750 mg·L−1 of each heavy metal ion. Three promising microorganisms, identified as Enterobacter sp. INV PRT213, Pseudomonas sp. INV PRT215, and Stenotrophomonas sp. INV PRT216 were selected for lead removal experiments using LB broth medium supplemented with 400 mg·L−1 Pb2+. Among these, Pseudomonas sp. INV PRT215 exhibited significant potential, removing 49% of initial Pb2+ after 240 min of exposure (16.7 g wet biomass·L−1, pH 5, 30 °C). Infrared spectra of Pb-exposed biomass showed changes in functional groups, including carbonyl groups of amides, carboxylate, phosphate, hydroxyl, and amine groups, compared to the not-exposed control. These changes suggested interactions between the metal and functional groups in the biomass. The findings of this study highlight the potential of microorganisms derived from coastal marine environments as promising candidates for future applications in bioremediation of polluted environments contaminated with heavy metals.

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Section: Discussionmentioning

confidence: 96%

Heavy Metal Tolerance of Microorganisms Isolated from Coastal Marine Sediments and Their Lead Removal Potential

Alvarado-Campo,

Quintero,

Cuadrado-Cano

et al. 2023

Microorganisms

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“…Past studies revealed that the bacterium is tolerant to drought and heavy metals, also exhibits plant growth-promoting traits (Kalkan 2022;Fallahzadeh-Mamaghani et al 2023). Plant growth-promoting traits are believed as tolerant mechanisms of bacteria under abiotic stress (Kumar et al 2020), such as salinity, drought, and heavy metals.…”

Section: Pb Minimum Inhibitory Concentration Of the Isolatedmentioning

confidence: 99%

Lead (Pb)-Resistant Bacteria Improve <i>Brassica chinensis</i> Biomass and Reduce Pb Concentration in Pb-Contaminated Soil

Pertiwi,

Ustiatik,

Nuraini

2024

J.Tropical Biodiversity Biotechnology

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Applications of inorganic fertilisers and pesticides frequently increase lead (Pb) content in the soil and food crops. This study aims to isolate Pb-resistant bacteria and test the isolated bacteria in reducing Pb concentration and increasing biomass production of Brassica chinensis on Pb-contaminated soil. Soil and plant samples were collected from agricultural land in Batu City, East Java, Indonesia. The isolated bacteria were tested for Pb resistance and then characterised according to 16S rRNA Sequence. A pot trial with a completely randomised block design consisting of 9 treatments and 3 replications was set to determine the effect of Pb-resistant bacteria inoculation on Pb residue, plant growth, and soil nutrients. The result showed that the isolated Pb-resistant bacteria were Bacillus wiedmannii and Bacillus altitudinis. The bacteria were resistant to Pb up to 10,000 mg/L PbNO3. Inoculation of the bacteria increased B. chinensis growth and biomass production, namely increasing the number of leaves (12%) and dry weight (35%). Also, the bacteria reduced Pb residue in the soil by up to 88%. Moreover, soil essential nutrients such as total nitrogen, available phosphorus, and exchangeable potassium increased (12%, 73%, and 200%, respectively) after the application of Pb-resistant bacteria. The bacteria have the potential for bioremediation of Pb-contaminated soils on a large scale due to the bacteria prevent Pb uptake by food crops such as B. chinensis by reducing Pb content in the soil, which is good for food safety and environmental sustainability.

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“…Moreover, in one study, the isolated bacterial strain Priestia aryabhattai, which possesses toxic metal healing properties, was isolated from contaminated soil and water, and described as a potential agent for arsenic remediation (Kumar et al 2021). In addition, the isolate of Priestia megaterium, one of the bacteria isolated from sediments transported to the Black Sea with some toxic metal salts, is reported to provide important evidence of potential isolates for bioremediation and biotechnological approaches (Kalkan 2022).…”

Section: Absorptionmentioning

confidence: 99%

Removal efficacy of toxic metals in leachate through micro-organisms isolated from the natural environment

Kocaman,

Savaş,

İşler Ceyhan

2023

BioRes

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Landfill leachate is a serious contaminant for groundwater and surface water because of its potentially toxic metal content. In many countries, leachate is discharged into the natural environment without treatment because of the high disposal cost. However, this environmental problem can be solved by microorganisms, as they can adsorb the contaminants or convert them into end products, and this is cost-effective. This study focused on determining bacteria capable of efficiently removing toxic metals from leachates. Therefore, bacteria were isolated from nature that have a high adsorption and resistance capacity to a number of toxic metals. This potential was achieved by Enterobacter hormaechei, Priestia aryabhattai, and Mycobacterium sacrum, among others. Their efficiency in removing toxic metals compared to raw leachate was Cd (78%, 67%, 78%), Ni (64%, 57%, 56%), Pb (99%, 75%, 76%), Cr (41%, 46%,19%), Co (45%, 60%, 40%), and Cu (80%, 80%, 60%), respectively. According to the results, these bacterial strains proved to be very effective in the treatment of toxic metals from leachate. Therefore, they are good candidates for the treatment of wastewater by bioremedial methods.

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Heavy metal resistance of marine bacteria on the sediments of the Black Sea

Cited by 13 publications

References 63 publications

Heavy Metal Tolerance of Microorganisms Isolated from Coastal Marine Sediments and Their Lead Removal Potential

Heavy Metal Tolerance of Microorganisms Isolated from Coastal Marine Sediments and Their Lead Removal Potential

Lead (Pb)-Resistant Bacteria Improve <i>Brassica chinensis</i> Biomass and Reduce Pb Concentration in Pb-Contaminated Soil

Removal efficacy of toxic metals in leachate through micro-organisms isolated from the natural environment

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