title: Removal of Cu and Zn from swine raising wastewater using organic filters.
abstract: Rice husks, coffee bean skins, sugar cane bagasse, maize cobs, saw dust and fine charcoal dust were evaluated as filters for the removal of heavy metals (Cu and Zn) from the waste water of swine raising installations. The specific mass, pH and the sum of bases and removable acids were determined to characterize each of the filter materials. Each filtering material was placed in a 100 mm diameter, 600 mm long, PVC column to a height of 500 mm under 12,500 N m(-2) of compression. Chemical and physical analyses were determined on effluent samples collected for each 1.5 l up to a total of 15 l. The organic materials reduced the concentration of sediment solids (> 90%), total solids (up to 33%) and Cu (up to 43.6%) of the inffluent but had little or no effect on Zn concentration.
authors.affiliation: Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, 36571-000 Vicosa-MG, Brazil.
authors.forename: A T
authors.initials: AT
authors.lastname: de Matos
authors.forename: V S
authors.initials: VS
authors.lastname: Brandão
authors.forename: J C L
authors.initials: JC
authors.lastname: Neves
authors.forename: M A
authors.initials: MA
authors.lastname: Martinez
mesh_terms: D000818:Animals; D002606:Charcoal; D003069:Coffee; D003300:Copper / Q000302:isolation & purification*; D004391:Dust; D005374:Filtration; D012275:Oryza; D031786:Saccharum; D013552:Swine; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000379:methods*; D014934:Wood; D003313:Zea mays; D015032:Zinc / Q000302:isolation & purification*
chemical_list: D003069:Coffee; D004391:Dust; D002606:Charcoal; D003300:Copper; D015032:Zinc