Identification and Characterization of Peruvian Native Bacterial Strains as Bioremediation of Hg-Polluted Water and Soils Due to Artisanal and Small-Scale Gold Mining in the Secocha Annex, Arequipa

Fernando Fernandez-F, Patricia Lopez-C, Camilo Febres-Molina, Pamela L. Gamero-Begazo, Badhin Gómez, Julio Cesar Bernabe-Ortiz, Alberto Cáceres-Huambo, Jorge Alberto Aguilar-Pineda

Research output: Contribution to journalArticlepeer-review

Abstract

The water and soils pollution due to mercury emissions from mining industries represents a serious environmental problem and continuous risk to human health. Although many strategies have been designed for the recovery or elimination of this metal from environmental sources, microbial bioremediation has proven to be the most effective and environmentally friendly strategy and thus control heavy metal contamination. The main objective of this work, using native bacterial strains obtained from contaminated soils of the Peruvian region of Secocha, was to identify which of these strains would have growth capacity on mercury substrates to evaluate their adsorption behavior and mercury removal capacity. Through a DNA analysis (99.78% similarity) and atomic absorption spectrometry, the Gram-positive bacterium Zhihengliuella alba sp. T2.2 was identified as the strain with the highest mercury removal capacity from culture solutions with an initial mercury concentration of 162 mg·L−1 . The removal capacity reached values close to 39.5% in a period of incubation time of 45 days, with maximum elimination efficiency in the first 48 h. These results are encouraging and show that this native strain may be the key to the bioremediation of water and soils contaminated with mercury.

Original languageEnglish
Article number2669
JournalSustainability
Volume14
Issue number5
DOIs
StatePublished - 1 Mar 2022
Externally publishedYes

Bibliographical note

Funding Information:
Funding: The author thanks the financial support of the UCSM.

Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

  • Bioremediation
  • Mercury removal
  • Native bacterial strains
  • Zhihengliuella alba

Fingerprint

Dive into the research topics of 'Identification and Characterization of Peruvian Native Bacterial Strains as Bioremediation of Hg-Polluted Water and Soils Due to Artisanal and Small-Scale Gold Mining in the Secocha Annex, Arequipa'. Together they form a unique fingerprint.

Cite this