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Um estudo sobre os resíduos sólidos urbanos depositados em um aterro sanitário de uma cidade do noroeste paulista

Authors
  • Lima, Paula Garcia
Publication Date
Jan 23, 2018
Source
Repositório Institucional UNESP
Keywords
Language
Portuguese
License
Unknown
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Abstract

The operation of a landfill is essential for the management of waste, since it is the final disposal phase of municipal solid waste. Therefore, the present study aimed to analyze the impacts of urban solid waste being deposited in a sanitary landfill of a municipality in the interior of the State of São Paulo. To reach the proposed goal this research was divided into three distinct articles. The first article aimed to analyze by means of the waste quality index (IQR-V), if the management of the landfill is in accordance with the methodology implemented by the Environmental Company of the State of São Paulo (CETESB) and according to the environmental purposes established for the landfill. It can be concluded that in the application of the standardized questionnaires that evaluated the local, operational and structural characteristics of the facilities of this sanitary landfill, it is in inadequate environmental conditions. The second article had as objective to analyze the composition of the residues deposited in this landfill by means of the gravimetric analysis of the residues, which consists of the representation of the physical composition of the solid residues in percentages, relating the different fractions of the materials that compose the urban solid waste in relation to the total weight of the sample. In this study it was verified that 72.94% of the residues deposited in the landfill have potential for other economic activities, such as composting and recycling / reuse. In the economic potential of the recycling fraction, the results showed that around R $ 2,700 per month are being wasted by the municipality with the disposal of solid waste that could be sent to recycling. The third article aimed to analyze the concentration profile of potentially toxic metals and aromatic hydrocarbons of human health risk in landfill land. This is an important tool to evaluate the possible presence of contaminants from inappropriate disposal of waste as well as assist in the management of discards and control of environmental contamination. Therefore, soil samples were collected at different locations and depths to analyze cadmium, lead, nickel, arsenic, mercury, that are potentially toxic elements and aromatic hydrocarbons benzene, ethylbenzene, o-xylene, m-xylene , p. The results of potentially toxic metals and aromatic hydrocarbons present in the soil of the landfill were below the guideline values of CONAMA Resolution 420, which has criteria and values of soil quality for the presence of chemical substances in Brazil. Based on the results found, it can be considered that the low levels found may be related to the time of activity of the landfill or to the profile of the population of the municipality, which is predominantly agricultural based on family agriculture.

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