Caracterização físico-química das águas subterrâneas das áreas circunvizinhas ao lixão do Aurá

Abstract

Water is fundamental for the maintenance of life, so the importance of preserving the Earth's water resources and avoiding their contamination must be stressed. Just over 97% of the fresh water available on Earth is found underground, and therefore less than 3% of the potable water available on the planet comes from surface water. Under natural conditions, groundwater is free of pathogens, turbidity, color, and taste, but external factors can modify the quality of this water. Taking into consideration that there is the possibility of the plume of contamination proceeding from the infiltration of the leachate of the sanitary landfill of Aurá, to be reaching the groundwater, this subproject proposed to study the underground water in the surrounding area of the "garbage dump", with the objectives to offer support to characterize the water of the groundwater, in agreement with the Resolution N° 20/1986 of the CONAMA; to identify, if there is, the main pollutants, to make the mapping of the monitored points and the interpretation of the found levels. The parameters studied are: alkalinity, turbidity, S.T.D., chlorides hardness, sulfate, nitrate, nitrite, total iron, total phosphorus, electrical conductivity and pH. During the month of December 1998, the first research campaign was carried out, and 15 groundwater wells were chosen, covering the Júlia Seffer and Águas Lindas areas. The preliminary results obtained showed that the water in the area studied is within the established standards of potability. Since this is water for human consumption, bacteriological analyses were necessary, which will be included in the next campaign, and new points will also be included in order to obtain more comprehensive results.