Fungal weathering of asbestos in semi arid regions of India.

  title={Fungal weathering of asbestos in semi arid regions of India.},
  author={Shabori Bhattacharya and P. J. John and Lalita Ledwani},
  journal={Ecotoxicology and environmental safety},
The science of Geomicrobiology, which deals with mineral- microbe interaction in nature contributes effectively to three important processes namely- mineral and metal bioremediation, biomining and soil mineral formation by microbes. Bioremediation one of the important process of the above, degrades or transforms hazardous contaminants to less toxic compounds. Several groups of fungi have proved highly efficient in this aspect, with asbestos being one such toxic entity in the environment on… Expand
4 Citations
Microbial siderophores an envisaged tool for asbestos bioremediation – A microcosm approach
Abstract The stability of asbestos in natural environment with its biological aggressiveness and toxicity leading to carcinogenesis is related to its fibrous structure, dimensions and presence ofExpand
Iron removal from raw asbestos by siderophores-producing Pseudomonas.
The study clearly showed the involvement of bacterial siderophores, pyoverdine and pyochelin on chrysotile, crocidolite and amosite fibers weathering and the iron removal was more important for all types. Expand
Biodeterioration of asbestos cement by siderophore-producing Pseudomonas.
The optimization of pyoverdine-asbestos weathering may allow the development of a bioremediation process to avoid the disposal of such waste in landfills. Expand
Flocking asbestos waste, an iron and magnesium source for Pseudomonas.
A significant increase in iron extraction in the presence of siderophores and the absence of one of the two sidersophores could be compensated by the other, suggesting a role of the pyoverdine and pyochelin pathway in asbestos dissolution. Expand


Bacterial Weathering of Asbestos
The process of bioweathering involving natural microbes, natural plants and transgenic animals has proven to be a very efficient and effective tool for detoxifying xenobiotics. The presentExpand
Bioweathering of chrysotile by fungi isolated in ophiolitic sites.
Iron removal had been correlated previously with a decrease in the toxic potential of fibres, and a biotechnological application of fungi can be envisaged for asbestos detoxification. Expand
Inorganic materials and living organisms: surface modifications and fungal responses to various asbestos forms.
The fungal metabolic response of F. oxysporum grown in the presence of chrysotile, amosite and crocidolite revealed that new extracellular proteins are induced--including manganese-superoxide dismutase, the typical antioxidant defense--and others are repressed, upon direct contact with the fibers. Expand
Soil fungi reduce the iron content and the DNA damaging effects of asbestos fibers.
Fungi may be regarded as appropriate candidates for bioremediation of asbestos rich soils whereby the reactive iron ions responsible for DNA damage are progressively removed from the fibers. Expand
Weathering of chrysotile asbestos by the serpentine rock-inhabiting fungus Verticillium leptobactrum.
The results of solubilization assays on magnesium and silicon, as well as measurement of the Mg/Si ratio in the asbestos fibres after exposure to fungal mycelia, indicate a high bioweathering activity of V. leptobactrum towards chrysotile. Expand
Geomycology: biogeochemical transformations of rocks, minerals, metals and radionuclides by fungi, bioweathering and bioremediation.
  • G. Gadd
  • Biology, Medicine
  • Mycological research
  • 2007
This article seeks to emphasize the fundamental importance of fungi in several key areas including organic and inorganic transformations and element cycling, rock and mineral transformations, bioweathering, mycogenic mineral formation, fungal-clay interactions, metal-fungal interactions, and the significance of such processes in the environment and their relevance to areas of environmental biotechnology such as bioremediation. Expand
Interactions of sterile-cultured lichen-forming ascomycetes with asbestos fibres.
The results show that in vitro incubation of sterile-cultured lichen-forming fungi with minerals is a practicable experimental system to investigate the weathering effects of different mycobionts and fungal compounds under controlled conditions. Expand
Ecology of siderophores with special reference to the fungi
The chemical stability of fungal siderophores is an important aspect of microbial life in soil and in the rhizosphere, and insolubility of iron in the environment is counteracted by dissolution and chelation through organic acids and sidersophores by various fungi. Expand
Metals, minerals and microbes: geomicrobiology and bioremediation.
  • G. Gadd
  • Environmental Science, Medicine
  • Microbiology
  • 2010
The ubiquity and importance of microbes in biosphere processes make geomicrobiology one of the most important concepts within microbiology, and one requiring an interdisciplinary approach to define environmental and applied significance and underpin exploitation in biotechnology. Expand
Applications of Bioremediation and Phytoremediation
  • C. Rhodes
  • Chemistry, Medicine
  • Science progress
  • 2013
The move toward finding "green" ways to ameliorate many environmental woes, including dealing with polluted environments, has led to a rising focus towards microbial degradation, which may be enhanced by the addition of appropriate oxidising or reducing amendment agents. Expand