Advanced search
Start date
Betweenand

Geological-geotechnical characterization of reactive organic materials to be used in the retention of potentially toxic metals

Grant number: 15/02529-4
Support type:Scholarships in Brazil - Master
Effective date (Start): November 01, 2015
Effective date (End): May 31, 2017
Field of knowledge:Engineering - Sanitary Engineering - Environmental Sanitation
Principal Investigator:Valéria Guimarães Silvestre Rodrigues
Grantee:Jacqueline Zanin Lima
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

In nature, most of the time, the geochemical cycles of potentially toxic metals are altered by human activities. The mining, for example, exponentially enhances the release of these metals contained in these minerals in the rocks, which, under natural conditions, occur slowly, mainly because of the resulting reactions of weathering and erosion. Once in the environment, such metals tend to accumulate, since they are not biologically or chemically degradable. Therefore, they can become a source of pollution and/or contamination of soil, surface water and groundwater. Further aggravating the situation, to reach living beings these metals are likely to accumulate (bioaccumulation), being disseminated and causing metabolic disorders by different trophic levels of the food chain. Consequently they can cause serious risks to public health and ecosystems. Thus, it is indubitable the importance of developing studies aimed to immobilization and/or removal of potentially toxic metals that, perchance, have already contaminated natural environments. In this perspective, the characterization of organic reactive materials is fundamental, given its effective adsorption capacity of metals, mainly due to a high CEC. For this purpose, reactive low cost materials, such as peat and compost from the composting process, can be used either pure or combined with the soil, retention of metals (both reactive barriers as sealants barriers). In the selection of the most viable reactive materials to be used in retention of potentially toxic metals is essential characterization (geological and geotechnical) and the study of its real adsorptive capacity through adsorption tests (with different metals). Thus, this research will involve characterization of peat and compounds resulting in two composters located in the USP (São Carlos campus), in order to prove the feasibility of using these materials in the retention of metals (Zn, Cd and Pb). Will also be carried out batch test and column test, verifying the retention capacity of the metals (Zn, Cd and Pb), in different means and in different conditions (mainly related to the pH and the equilibrium time). The use of the compound is advantageous to be a possibility of correct disposal of compostable urban solid waste, according to public policy, and that still adds value to the waste. (AU)

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)
MARQUES, JESSICA PELINSOM; SILVESTRE RODRIGUES, VALERIA GUIMARAES; RAIMONDI, ISABELA MONICI; LIMA, JACQUELINE ZANIN. Increase in Pb and Cd Adsorption by the Application of Peat in a Tropical Soil. WATER AIR AND SOIL POLLUTION, v. 231, n. 3 MAR 16 2020. Web of Science Citations: 2.
MARQUES, JESSICA P.; FERREIRA DA SILVA, EDUARDO A.; PATINHA, CARLA; KASEMODEL, MARIANA C.; RODRIGUES, VALERIA G. S. Adsorption of lead (Pb) in weathered tropical soil (Ribeira Valley region - Brazil). EARTH SCIENCES RESEARCH JOURNAL, v. 23, n. 4, p. 385-395, DEC 2019. Web of Science Citations: 1.
LIMA, JACQUELINE Z.; RAIMONDI, ISABELA M.; SCHALCH, VALDIR; RODRIGUES, VALERIA G. S. Assessment of the use of organic composts derived from municipal solid waste for the adsorption of Pb, Zn and Cd. Journal of Environmental Management, v. 226, p. 386-399, NOV 15 2018. Web of Science Citations: 5.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
LIMA, Jacqueline Zanin. Geological-geotechnical characterization and adsorption study of Pb, Zn and Cd by peat and organic compounds. 2017. Master's Dissertation - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos São Carlos.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.