Comparative Evaluation of Electron Beam and Gas Tungsten Arc Welded Aluminium Alloy AFNOR 7020/ Vergleichende Untersuchüng des Elektronenstrahl- und des Wolfram-Inertgas-Lichtbogenschweißens der Aluminiumlegierung AFNOR 7020

Rao, K. Prasad; Sekar, J. Chandra

doi:10.1515/pm-1993-300204

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“…Chemical and physical properties of the experimental soils are summarized Table I. They were determined by using AFNOR 19 normalized protocols. We collected agricultural soil (used as non-contaminated soil) in the 10-20 cm layer in a field of the experimental farm of INRA at Dijon (France).…”

Section: Soil Samplingmentioning

confidence: 99%

Inoculation of Filamentous Fungi in Manufactured Gas Plant Site Soils and PAH Transformation

Rama¹,

Sigoillot²,

Chaplain

et al. 2001

Polycyclic Aromatic Compounds

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Solid carriers have been developed to inoculate Trametes versicolor andCunninghamella elegans into manufactured gas plant site soils. Pelleted wheat bran carriers were very efficient in stimulating the growth of fungi in an industrial soil containing about 2800 mg kg -1 PAHs. Fungal biomass and activity of extracellular laccases, enzymes produced by T. versicolor as markers of metabolic activity in the contaminated soil, both decreased after 2 weeks of incubation. Supplementing the soil with a mixture of carbon, nitrogen and phosphorus enhanced the fungal activity period.A 38% decrease of solvent extractable PAHs was observed in manufactured gas plant site soils when supplemented with T. versicolor, Glucidex 19 TM , ammonium nitrate, lime phosphate and Montanox 80 TM , after 20 weeks. Then, the degradation proceeded more slowly during the following 30 weeks, and reached 43% of initial extractable PAHs. Some factors governing a limited PAH biotransformation in the soil are discussed.

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Section: Soil Samplingmentioning

confidence: 99%