Bioweathering of chrysotile by fungi isolated in ophiolitic sites.
Asbestos minerals are commonly found in serpentine rocks and because of the hazard to human health, research has recently focused on possible detoxification strategies. Some fungal species that inhabit serpentine sites (two disused chrysotile asbestos mines in the Western Alps) have been isolated and characterized in order to obtain data on their biodiversity and bioweathering abilities on chrysotile fibres. The three dominant species (Verticillium leptobactrum, Paecilomyces lilacinus and Aspergillus fumigatus) have proved to be able to actively remove iron from chrysotile fibres, V. leptobactrum being the most efficient. A wide range of serpentinicolous fungi release siderophores, iron-chelating compounds, that could play a role in iron extraction from fibres. 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.
Daghino
Stefania
S
Interdepartmental Centre G. Scansetti for Studies on Asbestos and Other Toxic Particulates, University of Torino, Torino, Italy.
Martino
Elena
E
Vurro
Emanuela
E
Tomatis
Maura
M
Girlanda
Mariangela
M
Fubini
Bice
B
Perotto
Silvia
S
D017632:Asbestos, Serpentine / Q000378:metabolism*; D001232:Aspergillus fumigatus / Q000378:metabolism; D002614:Chelating Agents / Q000378:metabolism; D005658:Fungi / Q000145:classification* / Q000302:isolation & purification / Q000378:metabolism*; D007501:Iron / Q000378:metabolism; D010143:Paecilomyces / Q000378:metabolism; D017262:Siderophores / Q000096:biosynthesis; D020172:Verticillium / Q000378:metabolism
D017632:Asbestos, Serpentine; D002614:Chelating Agents; D017262:Siderophores; D007501:Iron