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Effects of partial capping in the contaminants mobilization and microbial degradation in a closed waste deposit

Grant number: 18/24615-8
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2019
Effective date (End): October 31, 2019
Field of knowledge:Physical Sciences and Mathematics - Geosciences
Principal researcher:Edson Cezar Wendland
Grantee:Alice Kimie Martins Morita
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:15/03806-1 - Water availability and quality threats in a Guarani Aquifer System outcrop zone, AP.BIOEN.TEM


The physicochemical and microbiological evaluation of areas impacted by waste deposits is essential for the understanding of the involved attenuation and transport processes, contributing to the prevision of the necessity of intervention measures, as well as for the verification of their effectiveness. In Brasil and in tropical and subtropical conditions, studies concerning the characterization of waste deposits contaminant plumes are still scarce, which leads to management activities not properly adapted to the local conditions. Therefore, this research project aims at conducting an integrated and comparative assessment of the conditions in the saturated and non-saturated zones in a closed dumpsite area in São Carlos city, São Paulo state, situated in a Guarani Aquifer recharge zone, before and after its partial capping is implemented. Groundwater and solid residues samples will be collected, followed by physicochemical and microbiological analysis (DNA extraction, PCR-DGGE, 16R rRNA sequencing), before and after the impermeabilization. Geophysical surveys will be conducted complementarily, aiming at helping in the evaluation of contaminants mobilization in both scenarios. With this study, the goal is to relate the microbial community with the pollutants present in the residues massif and with the possible ongoing degradation processes, and, thus, predict the natural attenuation processes and the effects and benefits of the adoption of capping in unplanned waste deposits. The results may contribute with a better management of contaminated areas, providing a tool for the identification of natural attenuation and helping in the proposal of intervention and remediation measures. This doctorate project is part of the FAPESP thematic project " Water availability and quality threats in a Guarani Aquifer System outcrop zone", FAPESP grant 2015/03806-1. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MORITA, ALICE KIMIE MARTINS; SAKAMOTO, ISABEL KIMIKO; VARESCHE, MARIA BERNADETE AMANCIO; WENDLAND, EDSON. Microbial structure and diversity in non-sanitary landfills and association with physicochemical parameters. Environmental Science and Pollution Research, v. 27, n. 32, SI, . (18/24615-8, 15/03806-1)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
MORITA, Alice Kimie Martins. Effects of capping on contaminants mobilization and microbial community in a closed municipal solid waste landfill. 2020. Doctoral Thesis - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.

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