Uptake and transformation of metals and metalloids by microbial mats and their use in bioremediation

Bender, Judith; Lee, Richard F.; Phillips, Peter C.B.

doi:10.1007/bf01569892

Cited by 63 publications

(19 citation statements)

References 22 publications

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“…Cations show a strong affinity for fungal mycelium (Bender et al ., 1995) . The progressive increase in 95mTc, 1311 and ' 34 Cs with time in the ME treatment is suggestive of microbial uptake .…”

Section: Resultsmentioning

confidence: 99%

Effect of microbes on the uptake of 60Co, 85Sr, 95MTc, 131I and 134Cs by decomposing elm leaves in aquatic microcosms

Bird

Schwartz

1996

Hydrobiologia

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We used decomposition of elm leaf discs as a model system to determine the uptake of 60 Co, 85Sr, 95mT c, 131I and 134CS from freshwater by detritus and the role of microbes in this process . Two treatments were used : a microbially enhanced (ME) treatment and a microbially inhibited (MI) treatment . The ME treatment involved the addition of a microbial inoculum, collected from a beaver pond, and nutrients (5 mg P 1 -1 as K2HPO4 and 20 mg N 1 -1 as (NH4)2SO4) to the water to enhance microbial growth . The MI treatment involved sterlizing the leaf discs and water with gamma irradiation (1 .7 Gy s -1 for 4 h) and the addition of a fungicide (100 mg 1 -1 of nystatin) and bactericide (3 .0 mg 1 -1 each of streptomycin and penicillin) to the water . The 60Co, 95mTc, 1311 and 134 Cs concentrations of the elm leaf discs were greater (P<0.05) in the ME treatment than the MI treatment, whereas the 85 Sr concentration was higher in the MI treatment . The increase in the 9smT c, 1311 and 134 Cs concentration of leaf discs with time in the ME treatment suggests microbes played an important role in uptake . Uptake of these radionuclides by the leaf discs points to the potential importance of detritus in the accumulation of radionuclides . This could subsequently result in the transfer of radionuclides to higher trophic levels by the detritus-food web .

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Section: Resultsmentioning

confidence: 99%

Effect of microbes on the uptake of 60Co, 85Sr, 95MTc, 131I and 134Cs by decomposing elm leaves in aquatic microcosms

Bird

Schwartz

1996

Hydrobiologia

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“…There are some microbes (e.g., bacteria, phytoplankton, fungi, etc.) that in the soil and aquatic environment that have the ability/mechanisms to transform more toxic forms of the toxic metals and metalloids to their less toxic form (Summers and Silver 1978;Raab and Feldmann 2003;Bender et al 1995). This detoxification process of microbes is considered as a promising method for bioremediation of heavy metals and metalloids.…”

Section: Phytotransformation/detoxificationmentioning

confidence: 99%

Phytoremediation of Toxic Metals in Soils and Wetlands: Concepts and Applications

Rahman

Reichman

Filippis

et al. 2016

Environmental Remediation Technologies for Metal-Contaminated Soils

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Over centuries, industrial, mining and military activities, agriculture, farming, and waste practices have contaminated soils and wetlands in many countries with high concentrations of toxic metals. In addition to their negative effects on ecosystems and other natural resources, toxic metals pose a great danger to human health. Unlike organic compounds, metals cannot be degraded, and clean-up usually requires their removal. Most of the conventional remedial methods have lost economic favor and public acceptance because they are expensive and cause degradation of soil fertility that subsequently results in adverse impacts on the ecosystem. Conventional methods of environmental remediation do not solve the problem; rather they merely transfer it to future generation. Obviously, there is an urgent need for alternative, cheap, and efficient methods to clean-up sites contaminated with toxic metals.Phytoremediation, a plant-based green technology, is cost effective, environmental friendly, aesthetically pleasing approach for the remediation of toxic metals. Due to its elegance and the extent of contaminated areas, phytoremediation approaches have already received significant scientific and commercial attention. Two approaches have been proposed for the phytoremediation of toxic metals

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“…Sometimes nanomineral phases can even form directly in the bacterial cytoplasm as has been described for acanthite (Ag 2 S) (Klaus et al 1999) or amorphous iron hydroxide (Fortin 2004). The tolerance of biofilms to high metal concentrations may also be due to their ability to precipitate insoluble metal salts outside the cells as sulfides, phosphates, carbonates, oxides or hydroxides (Bender et al 1995;Douglas & Beveridge 1998).…”

Section: Biofilm and Metals/radionuclides Immobilizationmentioning

confidence: 99%

Developments in Bioremediation of Soils and Sediments Polluted with Metals and Radionuclides – 1. Microbial Processes and Mechanisms Affecting Bioremediation of Metal Contamination and Influencing Metal Toxicity and Transport

Tabak

Lens

Hullebusch

et al. 2005

Rev Environ Sci Biotechnol

197

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Uptake and transformation of metals and metalloids by microbial mats and their use in bioremediation

Cited by 63 publications

References 22 publications

Effect of microbes on the uptake of 60Co, 85Sr, 95MTc, 131I and 134Cs by decomposing elm leaves in aquatic microcosms

Effect of microbes on the uptake of 60Co, 85Sr, 95MTc, 131I and 134Cs by decomposing elm leaves in aquatic microcosms

Phytoremediation of Toxic Metals in Soils and Wetlands: Concepts and Applications

Developments in Bioremediation of Soils and Sediments Polluted with Metals and Radionuclides – 1. Microbial Processes and Mechanisms Affecting Bioremediation of Metal Contamination and Influencing Metal Toxicity and Transport

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