[Manganese sulphate: production method and pollution aspects [feed supplement]]

agua del suelo azufre cianuros cyanides cyanure danemark denmark desechos dinamarca eau du sol eau souterraine fer geologia geologie geology groundwater hidrogeologia hierro hydrogeologie hydrogeology iron manganese manganeso paille paja ph pollution de l'eau pollution du sol procesamiento processing soil pollution soil water soufre straw sulphur traitement wastes water pollution