Biological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture

Abstract Microbial bioremediation of heavy metals-polluted industrial effluents has been adopted as one of the most effective eco-friendly tool to cope up with the harmful effects of metals. This study was designed to investigate the biosorption potential of marine actinomycetes isolated from the Al...

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Autores principales: Amira M. Hamdan, Heba Abd-El-Mageed, Nevine Ghanem
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Publicado: Nature Portfolio 2021
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spelling oai:doaj.org-article:9ad8bc61dc394aacb79f15bce0db40c22021-12-02T17:39:20ZBiological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture10.1038/s41598-021-88843-y2045-2322https://doaj.org/article/9ad8bc61dc394aacb79f15bce0db40c22021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88843-yhttps://doaj.org/toc/2045-2322Abstract Microbial bioremediation of heavy metals-polluted industrial effluents has been adopted as one of the most effective eco-friendly tool to cope up with the harmful effects of metals. This study was designed to investigate the biosorption potential of marine actinomycetes isolated from the Alexandrian Mediterranean Seacoast, Egypt, with their potential use in metal remediation of industrial effluents. Among the nine marine actinomycetes isolates, Streptomyces rochei ANH showed the highest versatile metal resistance capability with MIC values of 125 mg/l for Cr6+ and 60 mg/l for both Cd2+ and Pb2+. Additionally, scanning electron micrographs showed complete disintegration of Cr6+-treated biomass compared with the control ones where spores remained intact and connected in long chains. The study also aimed to improve the percentage of Cr6+ biosorption by S. rochei ANH biomass using the statistical designs of Plackett–Burman and Box-Behnken where up to 85% of Cr6+ removal was recorded under the following conditions: pH (5), incubation temperature (30 °C), contact time (3 h), agitation speed (90 rpm), initial Cr6+ concentration (50 mg/l) and living biomass concentration (10 mg/ml). The results also showed that the percentage of Cr6+ biosorption by S. rochei ANH decreased gradually beyond these values. Moreover, the results revealed that the use of the biomass of S. rochei ANH is an effective biotechnological agent for the biological treatment of heavy metal-contaminated tannery effluent where the percentages of metal removal were in the following order: Ni2+ (100%) ≥ Cu2+  ≥ Mn2+  ≥ Fe2+  > Pb2+ (95%) ≥ Cd2+  > Cr6+ (86%). Furthermore, the treated effluent exhibited a stimulating effect on the germination process of Lepidium sativum seeds. Therefore, the present study implies that S. rochei ANH can be considered a powerful candidate to mitigate hazardous heavy metals pollution from industrial effluents and improve the water quality for agricultural purposes.Amira M. HamdanHeba Abd-El-MageedNevine GhanemNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Amira M. Hamdan
Heba Abd-El-Mageed
Nevine Ghanem
Biological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture
description Abstract Microbial bioremediation of heavy metals-polluted industrial effluents has been adopted as one of the most effective eco-friendly tool to cope up with the harmful effects of metals. This study was designed to investigate the biosorption potential of marine actinomycetes isolated from the Alexandrian Mediterranean Seacoast, Egypt, with their potential use in metal remediation of industrial effluents. Among the nine marine actinomycetes isolates, Streptomyces rochei ANH showed the highest versatile metal resistance capability with MIC values of 125 mg/l for Cr6+ and 60 mg/l for both Cd2+ and Pb2+. Additionally, scanning electron micrographs showed complete disintegration of Cr6+-treated biomass compared with the control ones where spores remained intact and connected in long chains. The study also aimed to improve the percentage of Cr6+ biosorption by S. rochei ANH biomass using the statistical designs of Plackett–Burman and Box-Behnken where up to 85% of Cr6+ removal was recorded under the following conditions: pH (5), incubation temperature (30 °C), contact time (3 h), agitation speed (90 rpm), initial Cr6+ concentration (50 mg/l) and living biomass concentration (10 mg/ml). The results also showed that the percentage of Cr6+ biosorption by S. rochei ANH decreased gradually beyond these values. Moreover, the results revealed that the use of the biomass of S. rochei ANH is an effective biotechnological agent for the biological treatment of heavy metal-contaminated tannery effluent where the percentages of metal removal were in the following order: Ni2+ (100%) ≥ Cu2+  ≥ Mn2+  ≥ Fe2+  > Pb2+ (95%) ≥ Cd2+  > Cr6+ (86%). Furthermore, the treated effluent exhibited a stimulating effect on the germination process of Lepidium sativum seeds. Therefore, the present study implies that S. rochei ANH can be considered a powerful candidate to mitigate hazardous heavy metals pollution from industrial effluents and improve the water quality for agricultural purposes.
format article
author Amira M. Hamdan
Heba Abd-El-Mageed
Nevine Ghanem
author_facet Amira M. Hamdan
Heba Abd-El-Mageed
Nevine Ghanem
author_sort Amira M. Hamdan
title Biological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture
title_short Biological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture
title_full Biological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture
title_fullStr Biological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture
title_full_unstemmed Biological treatment of hazardous heavy metals by Streptomyces rochei ANH for sustainable water management in agriculture
title_sort biological treatment of hazardous heavy metals by streptomyces rochei anh for sustainable water management in agriculture
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/9ad8bc61dc394aacb79f15bce0db40c2
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