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The use of bacterial bioremediation of metals in aquatic environments in the twenty-first century: a systematic review

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Abstract

Metal pollution is a current environmental issue as a consequence of unregulated anthropic activiy. A wide range of bioremediation strategies have been successfully implemented to recover contaminated areas. Among them, bacterial bioremediation stands out as a promising tool to confront these types of concerns. This study aimed to compare and discuss worldwide scientific evolution of bacterial potential for metal bioremediation in aquatic ecosystems. The study consisted of a systematic review, elaborated through a conceptual hypothesis model, during the period from 2000 to 2016, using PubMed, MEDLINE, and SciELO databases as data resources. The countries with the largest number of reports included in this work were India and the USA. Industrial wastewater discharge was the main subject associated to metal contamination/pollution and where bacterial bioremediations have mostly been applied. Biosorption is the main bioremediation mechanism described. Bacterial adaptation to metal presence was discussed in all the selected studies, and chromium was the most researched bioremedied substrate. Gram-negative Pseudomonas aeruginosas and the Gram-positive Bacillus subtilis bacteria were microorganisms with the greatest applicability for metal bioremediation. Most reports involved the study of genes and/or proteins related to metal metabolism and/or resistence, and Chromobacterium violaceum was the most studied. The present work shows the relevance of metal bacterial bioremediation through the high number of studies aimed at understanding the microbiological mechanisms involved. Moreover, the developed processes applied in removal and/or reducing the resulting environmental metal contaminant/pollutant load have become a current and increasingly biotechnological issue for recovering impacted areas.

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Authors and Affiliations

  1. Development and Environment, Biosciences Center, Federal University of Rio Grande do Norte, Natal, RN, Brazil

    Feliphe Lacerda Souza de Alencar, Julio Alejandro Navoni & Viviane Souza do Amaral

  2. Department of Cell Biology and Genetics, Federal University of Rio Grande do Norte (UFRN), Natal, RN, Brazil

    Viviane Souza do Amaral

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  1. Feliphe Lacerda Souza de Alencar
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  2. Julio Alejandro Navoni
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  3. Viviane Souza do Amaral
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Responsible editor: Robert Duran

Electronic supplementary material

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Gram-negative bacterias estudied for bioremediation of metals (DOCX 14 kb)

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Gram-positive bacterias with applicability for bioremediation of metals (DOCX 12 kb)

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Phenotypic adaptation and bioremediation mechanisms for metals by Gram-negative bacteria.* unicelular microalga (DOCX 21 kb)

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Phenotypic adaptation and bioremediation mechanisms for metals by Gram-positive bacteria (DOCX 16 kb)

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de Alencar, F.L.S., Navoni, J.A. & do Amaral, V.S. The use of bacterial bioremediation of metals in aquatic environments in the twenty-first century: a systematic review. Environ Sci Pollut Res 24, 16545–16559 (2017). https://doi.org/10.1007/s11356-017-9129-8

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