Influência da lixeira municipal do bairro Padeiro na cidade de Quelimane na qualidade de água subterrânea

Abstract

The municipal wastebasket of the city of Quelimane is located in the district Baker in the downtown area. Estimating that on average a day in the city produces little more than 60 tons of urban solid waste and that they are deposited in the open sky (in the ground) being able to threaten the quality of the groundwater once the water recharge underground is in most cases due to infiltration of water into the soil. Therefore, the general objective of this work was to evaluate the influence of the municipal wastewater in the quality of groundwater, located in the district of Padeiro in the city of Quelimane, through physicochemical parameters of groundwater quality. Three wells were opened for the collection of the samples, where their characterization was based on the direct observation method. The samples for physical-chemical parameters analysis were collected on May 23 and June 23 and analyzed in the FIPAG laboratory. For the analysis of electrical conductivity and total dissolved solids, a digital conductivity meter was used and the DR900 Portable Spectrophotometer was used for ammonia and nitrate. The results showed that the groundwater level in the studied wells is very close to the surface with an average depth of 1.40m and there was an increase in nitrate concentrations, electrical conductivity and total dissolved solids, taking into account the normality of these parameters in the groundwater, which usually have low concentrations. Thus, the municipal waste bin influences the alteration of groundwater quality resulting from the soluble part of the solid waste and the decomposition of the organic matter.