科研之友
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摘要
domestic sewage involves several products, such as pesticides, pharmaceutics products, detergents, soybean oil, heavy metal of battery, and others. it is discharged continually in landfill or at any place in city as manaus. when non-treated the landfill leachate contaminates the superficial and groundwater water. the water and sediment samples were collected from the following streams: igarap谷 do matrinxˋ, igarap谷 do acar芍, igarap谷 da bol赤via, bacia do tarumˋ-aˋu and within sanitary landfill (manaus amazonas - brazil) in march of 2001. the water samples were filtered in milipore 0.45 mm, treated with concentrated hno3. the sediment samples were served to 0.053 mm and treated with concentrated hcl:hno3 (1:3). the co, cu, fe, cr, ni, mn, pb and zn concentrations were determined by flame atomic absorption spectrometric. the results showed that heavy metals have concentration above the level permitted by brazilian environmental protection law (number 357/2005 conama) showing that landfill is the major responsible by environment impact of aquatic system. the principal component (pca) and hierarchical cluster (hca) analyses reveal that samples collected within of sanitary landfill have different characteristics from other site sampling. additionally, hca and pca show a similarity between site samplings located out landfill it allows to sustain that the leachate is dissolved by whole aquatic system studied.
