Extraktion eines kupferbelasteten Bodens unter Verwendung eines aminosäurehaltigen Reststoffhydrolysats. 2. Elutionsdynamik und Bilanzierung der Aminosäuren nach kontinuierlichem Eintrag in Bodensäulen

Fischer, Klaus; Blay, Karlheinz; Kotalik, Jarmila; Riemschneider, Peter; Klotz, D.; Kettrup, A.

doi:10.1002/jpln.19971600412

Cited by 3 publications

(1 citation statement)

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“…The elution profiles of hydroxy amino acids (Ser, Thr, Tyr), their low recoveries, the increasing recoveries of neutral amino acids following the row Gly < Ala < Val, and the remarkable increase of soil biomass gave some evidence for the prevailing of biodegradation processes. The elution of histidine, but not of other basic amino acids, was strongly retarded, presumably caused by sorption processes (30). Since a significant concentration decrease of amino acids in the percolates would reduce or disrupt the metal transport, short contact times, high infiltration rates, and measures against fast adaptation of soil biomass are prerequisites for a further upscaling of the treatment method.…”

Section: Discussionmentioning

confidence: 99%

Utilization of Biomass Residues for the Remediation of Metal-Polluted Soils

Fischer

Bipp

Riemschneider

et al. 1998

Environ. Sci. Technol.

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The utilization of biomass residues as sources for natural chelates is a new approach to improve the ecological and economical balance of leaching techniques for the remediation of metal-polluted soils. Residues, such as molasses, blood meal, and silage effluents, containing various aliphatic carboxylic acids, sugar acids, and amino acids or their precursor compounds were selected, hydrolyzed and oxidized, if required, and analyzed for their organic constituents. Soils that were contaminated with metals via sewage sludge amendment were extracted in batch and column experiments at various pH values. Grass silage effluent removed ∼75% of Cd and >50% of Cu and Zn at pH 4.4. The neutralized effluent was less effective except for Cu (69% leached). The neutral blood meal hydrolysate extracted primarily Cu (55−66%) and Ni (38−67%). Metal bonds attacked by this extractant were identified using a sequential leaching procedure. Hydrolysates containing sugar acids mobilized Cu and Pb under alkaline conditions. The actual results support the conclusion that biomass residues have a potential to serve as extractants in remediation techniques.

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Section: Discussionmentioning

confidence: 99%