Dinâmica do chumbo no lago do Parque Ingá, Maringá, PR, Brasil

Abstract

This work introduce the study of lead dynamic in the lake of Ingá Park, Maringá - PR. Monthly, during a year, samples of water and sediments were collected and pH and temperature measured. In the water samples were determined the chemical oxygen demand (COD) and the total lead concentration in water and sediment samples. The determination of lead concentration in water and sediments was performed with atomic absorption spectrometer - flame technique. The monthly mean values found, presented in intervals and global mean values, were respectively: lead concentration in water (ng.mL-1), non detected (nd) - 55.56 and 19.23; lead in sediments (μg.g-1), 48.73 - 92.87 and 71.93; pH, 7.02 - 8.23 and 7.60; temperature (°C), 19.33 - 27.48 and 23.73; COD (mg.L-1), 13.33 - 30.11 and 23.54. A survey of the lead concentration results found permit to conclude, at 5% of significance, that the lead concentration in water was independent of the sampling point (local), but dependent of the sampling period (temporality) and in the sediment dependent of the two parameters. © 1998, Paraná Institute of Technology Publication.