The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1998
Filed:
Apr. 28, 1997
Applicant:
Inventors:
Klaus Fischer, Dachau, DE;
Hans-Peter Bipp, Munchen, DE;
Peter Riemschneider, Eichenau, DE;
Antonius Kettrup, Arnsberg, DE;
Dieter Bieniek, Unterschleissheim, DE;
Assignee:
GSF-Forschungszentrum fur Umwelt und Gesundheit GmbH, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B09B / ;
U.S. Cl.
CPC ...
4352625 ; 210912 ;
Abstract
In a method for reducing the content of heavy metals of solid materials, particularly of soils, a 0.1-10% aqueous solution of chemically modified biomasses of waste and residue materials is applied to the solid material whereby the heavy metals are released and extracted from the solid material. The biomass solution residues remaining in the solid material after the heavy metal extraction procedure is rapidly biodegradable so that no objectionable traces remain in the solid materials or soils.