In situ bioremediation of contaminated soils in uranium deposits

Groudev, Stoyan; Spasova, Irena; Nicolova, Marina; Georgiev, Plamen

doi:10.1016/j.hydromet.2010.02.027

Cited by 24 publications

(7 citation statements)

References 18 publications

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“…Energy and carbon sources (or electron acceptors) for microbial metabolism was available in the NA media, but they only existed at a limited amount in the SBS media. Carbon functions not only as an electron donor in cellular metabolism but also as a constitutive element of cells (Groudev et al, 2010). Since the soil bacteria in Point C had higher C content and C/N ratio in their natural environment, their colonies experienced difficulty in adapting to low nutrients, became undeveloped, and survived only until Day 21 in the SBS media.…”

Section: Resultsmentioning

confidence: 99%

Potential of Soil Bacteria as Mercury Bioremediation Agent in Traditional Gold Mining

et al. 2019

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Mandor Village has developed as a tradisional gold mining area since years ago. It involved activities that have led to extreme land condition and the release of mining residues, i.e., mercury, to the soils. The study examined the potential of soil bacteria as mercury bioremediation agent based on their population and activity in former mines with different ages. The bacterial population was measured by isolating soil bacteria on solid media using the pour plate method, and the colonies were enumerated during the incubation. The Nutrient Agar (NA) medium was used to obtain the total population, whereas the Salt Base Solution (SBS) was to determine the presence of mercury-tolerant bacteria. The addition of HgCl 2 affected the number of the colonies. The colony only grew until the concentration of HgCl 2 reached 5 mg/l, and the total colony was larger in older mines. The observation of bacterial activity showed that biotransformation performance was lower when the concentration of mercury was the same as its natural presence in soils (0.1-0.5 mg/l) compared with higher mercury level (1 mg/l). The research showed that lower mercury concentrations in nature reduced the natural ability of bacteria to transform pollutants. This study provides information that can assist the development of a technological approach to control mercury pollution in former traditional gold mines in an environmentally friendly manner using indigenous soil bacteria.

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Section: Resultsmentioning

confidence: 99%

Potential of Soil Bacteria as Mercury Bioremediation Agent in Traditional Gold Mining

et al. 2019

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“…However, phytoextraction may be ineffective or too length, whereas high-energy thermal treatments or conventional contaminant-removal based treatments are generally expensive and/or produce high-radioactive wastes or wastewater needing landfill disposal. Furthermore, in situ management of contaminated sites is preferable, being potentially less expensive and less risky than ex-situ management (Groudev et al, 2010). In all cases, specific remediation strategies aimed at reducing the doses to local residents, with a focus on external gamma irradiation are strictly recommended (Hardie and McKinley, 2014).…”

Section: Introductionmentioning

confidence: 99%

Application of a γRS index-based method and techno-economic analysis for in situ treatment of 137 Cs-contaminated soils by cement-barite based stabilisation/solidification

Falciglia

Romano

Vagliasindi

2017

Journal of Environmental Management

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“…Microbial bioremediation has been emerged as an alternative technology to reduce heavy metal concentrations to acceptable levels in the ecosystem and enhance the removal of metals from aqueous systems (Groudev et al, 2010;Kumar et al, 2010). To understand the behavior of complex aquatic and biogeochemical ecosystems, it is vital to study effects of heavy metals to native microorganisms.…”

Section: Introductionmentioning

confidence: 99%

The influence of single and combined effects of Zn, Cu and temperature on microbial growth

2014

Global NEST Journal

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The purpose of the present study is to investigate the single and joint effect of zinc and copper to the growth pattern of the metal tolerant species of Arthrobacter sp. JM018. The results showed that, both, Zn and Cu at concentrations between 1 to 10 μM stimulated the growth of the above microorganism at 35 °C. Stimulation was reduced with the increase of Zn concentration, while the opposite phenomenon was observed for copper. On the other hand, similar concentrations of joint Zn and Cu resulted to slight growth inhibition, indicating antagonism between the studied heavy metals. Experiments with the same microorganism at 20 °C and 35 °C, at metal free and 10 μM Zn, indicated that the stimulatory effect of zinc was significantly more pronounced at lower temperatures. The latter is indicative of the strong role of temperature on the expression of heavy metals to microorganisms.

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In situ bioremediation of contaminated soils in uranium deposits

Cited by 24 publications

References 18 publications

Potential of Soil Bacteria as Mercury Bioremediation Agent in Traditional Gold Mining

Potential of Soil Bacteria as Mercury Bioremediation Agent in Traditional Gold Mining

Application of a γRS index-based method and techno-economic analysis for in situ treatment of 137 Cs-contaminated soils by cement-barite based stabilisation/solidification

The influence of single and combined effects of Zn, Cu and temperature on microbial growth

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