Caracterização da qualidade ambiental das aguas subterrâneas á volta da lixeira municipal de Hulene

Abstract

The uncontrolled disposal of waste at the Hulene dump over time may have resulted in the contamination of the soils in the residential area and, by extension, the groundwater: the main source of supply for the resident population. This was the subject of this study. At six dispersed points, samples were taken from local drinking water sources and these were physically and chemically characterized. Compared to the standard values and taken from (MISAU: Ministerial Diploma n.2 180/2004, 2004) and (WHO, 2022), it was found that, for all the points sampled, physically, the water was colored above what was established and one well stood out significantly in the negative: well 5. The same well was the only one above what was established for the turbidity parameter. All the other analyses tested (total dissolved solids and conductivity) were not cause for alarm. Chemically, there were considerable quantities of metals dissolved in the water that are harmful to human health. These include aluminum, arsenic, cadmium, manganese, nickel, lead and selenium. The other parameters tested (pH, alkalinity, nitrates, dissolved O2, barium, calcium, cobalt, chromium, copper, iron, sodium and zinc) were not a cause for alarm with regard to the established quality. Combined, the parameters (physical and chemical) indicate that the water is unsuitable for consumption given the possible risk of contracting diseases. (TRADUÇAO NOSSA)