AVIS CONCERNANT LE CHOIX D'UN ADULTICIDE POUR LE CONTRÔLE DES INSECTES AFIN DE CONTRER LA TRANSMISSION DU VIRUS DU NIL OCCIDENTAL AU QUÉBEC

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.