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Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064


LEMES, Marcos José de Lima; FIGUEIREDO FILHO, Paulo Miranda  and  PIRES, Maria Aparecida Faustino. Mineral influence on chemical composition of drinking water supply from Mogi-Guaçu and Pardo rivers. Quím. Nova [online]. 2003, vol.26, n.1, pp.13-20. ISSN 0100-4042.

This work studied bottom sediment from catchment area of 13 stations of water treatment of Mogi-Guaçu and Pardo river basins, through identification of mineralogical matrix and its correlation with potential bioavailable metal concentrations. The main clay minerals present were kaolinite and illite. The values of iron and manganese grades were derived from reddish-purple soil, which is rich of such elements. They had higher values on areas with weak vegetation cover compared with other areas linked with more vegetation density. Higher values of calcium at Campestrinho station (IG 69) were associated to occurrence by weathering of calcium feldspars markedly present on regional porphiritic acid rocks. The concentrations of phosphorous are characteristically high on areas near urbanized regions.

Keywords : sediment; X-ray diffraction (XRD); X-ray fluorescence (XRF); metal.

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