Influence of soil properties on the development of bacterial community tolerance to Cu, Ni, Pb and Zn

Campillo-Cora, Claudia; González-Feijoo, Rocío; Arias‐Estévez, Manuel; Fernández‐Calviño, David

doi:10.1016/j.envres.2022.113920

Cited by 5 publications

(2 citation statements)

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“…Our results indicate a higher tolerance to Pb, followed by Zn, and a moderate tolerance to Cr for both bacteria and fungi. In contrast, Campillo-Cora et al [ 97 ] reported a higher tolerance of the bacterial community to Zn compared to Pb, whereas Bérard et al [ 98 ] proved that long-term exposure to Pb, even in a polymetallic contamination context, along with Zn, Cu, or Cd, induced Pb tolerance in both bacteria and fungi, inhibition being less intense in fungal communities. Compared to Cr, Zn, Co, Cd, Ni, and Cu, Pb tolerance was higher in bacteria at concentrations up to 2000 mg/L, which is attributed to the role of proline in lessening the damage produced to membranes and proteins attributed to increased oxidative stress [ 99 ].…”

Section: Resultsmentioning

confidence: 99%

Microbial Removal of Heavy Metals from Contaminated Environments Using Metal-Resistant Indigenous Strains

Firincă,

Zamfir,

Constantin

et al. 2023

JoX

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Contamination of soil with heavy metals has become a matter of global importance due to its impact on agriculture, environmental integrity, and therefore human health and safety. Several microbial strains isolated from soil contaminated by long-term chemical and petrochemical activities were found to manifest various levels of tolerance to Cr, Pb, and Zn, out of which Bacillus marisflavi and Trichoderma longibrachiatum exhibited above-moderate tolerance. The concentrations of target heavy metals before and after bioremediation were determined using electrochemical screen-printed electrodes (SPE) modified with different nanomaterials. The morpho-structural SEM/EDX analyses confirmed the presence of metal ions on the surface of the cell, with metal uptake being mediated by biosorption with hydroxyl, carboxyl, and amino groups as per FTIR observations. T. longibrachiatum was observed to pose a higher bioremediation potential compared to B. marisflavi, removing 87% of Cr and 67% of Zn, respectively. Conversely, B. marisflavi removed 86% of Pb from the solution, compared to 48% by T. longibrachiatum. Therefore, the fungal strain T. longibrachiatum could represent a viable option for Cr and Zn bioremediation strategies, whereas the bacterial strain B. marisflavi may be used in Pb bioremediation applications.

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Section: Resultsmentioning

confidence: 99%

Microbial Removal of Heavy Metals from Contaminated Environments Using Metal-Resistant Indigenous Strains

Firincă,

Zamfir,

Constantin

et al. 2023

JoX

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“…Similarly, Shi et al (2002a, b) and Ipsilantis and Coyne (2007) did not find tolerant microbial communities to Cr even at high Cr levels, from 447 up to 263 000 mg Cr kg −1 . Therefore, considering that Cr pollution sometimes has no toxic effect on microbial communities and that, in other cases, microbial communities are affected by Cr from very low levels of Cr pollution, including soil properties in the assessment of Cr pollution is highly recommended, as for other heavy metals (Campillo-Cora et al, 2022b).…”

Section: Resultsmentioning

confidence: 99%

Increase in bacterial community induced tolerance to Cr in response to soil properties and Cr level in the soil

Campillo-Cora,

Arenas-Lago,

Arias-Estévez

et al. 2023

SOIL

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Abstract. Chromium (Cr) soil pollution is a pressing global concern that demands thorough assessment. The pollution-induced community tolerance (PICT) methodology serves as a highly sensitive tool capable of directly assessing metal toxicity within microbial communities. In this study, 10 soils exhibiting a wide range of properties were subjected to Cr contamination, with concentrations ranging from 31.25 to 2000 mg Cr kg−1, in addition to the control. Bacterial growth, assessed using the [3H]-leucine incorporation technique, was used to determine whether bacterial communities developed tolerance to Cr, i.e. PICT to Cr in response to Cr additions to different soil types. The obtained results revealed that at concentrations of 1000 or 2000 mg Cr kg−1, certain bacterial communities showed inhibited growth, likely attributable to elevated Cr toxicity, while others continued to thrive. Interestingly, with Cr concentrations below 500 mg Cr kg−1, bacterial communities demonstrated two distinct responses depending on soil type: 7 of the 10 studied soils exhibited an increased bacterial community tolerance to Cr, while the remaining 3 soils did not develop such tolerance. Furthermore, the Cr level at which bacterial communities developed tolerance to Cr varies among soils, indicating varying levels of Cr toxicity between studied soils. The dissolved organic carbon (DOC) and the fraction of Cr extracted with distilled water (H2O-Cr) played an essential role in shaping the impact of Cr on microbial communities (R2=95.6 %). These factors (DOC and H2O-Cr) contribute to increased Cr toxicity in soil, i.e. during the selection phase of the PICT methodology.

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Effectiveness of cork and pine bark powders as biosorbents for potentially toxic elements present in aqueous solution

González-Feijoo,

Santás-Miguel,

Arenas-Lago

et al. 2024

Environmental Research

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Influence of soil properties on the development of bacterial community tolerance to Cu, Ni, Pb and Zn

Cited by 5 publications

References 74 publications

Microbial Removal of Heavy Metals from Contaminated Environments Using Metal-Resistant Indigenous Strains

Microbial Removal of Heavy Metals from Contaminated Environments Using Metal-Resistant Indigenous Strains

Increase in bacterial community induced tolerance to Cr in response to soil properties and Cr level in the soil

Effectiveness of cork and pine bark powders as biosorbents for potentially toxic elements present in aqueous solution

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