eo-environmental and geotechnical characterization of municipal solid waste from the selective collection in Sao Paulo city, Brazi

Author(s)

Mondelli, Giulliana ^[1] ; Juarez, Mariana Barbosa ^[1] ; Jacinto, Christiane ^[1] ; de Oliveira, Marcio Adilson ^[1] ; Gomes Coelho, Lucia Helena ^[1] ; Biancardi, Cinthia Bergamo ^[1] ; de Castro Faria, Jose Leonardo ^[1]

Affiliation

^[1] Fed Univ ABC, Engn Modelling & Appl Social Sci Ctr, Av Estados 5001, BR-09210580 Santo Andre, SP - Brazil

• Document type: Journal article
• Source: Environmental Science and Pollution Research; v. 29, n. 13, p. 19898-19912, MAR 2022.
• Web of Science Citations: 0

Abstract

This paper presents the characterization of municipal solid waste (MSW) randomly collected from two material recovery facilities in Sao Paulo city, before (input - recyclables) and after (output - rejects) the sorting processes. Geo-environmental and geotechnical tests were performed on shredded samples and a digestion method was applied to detect the metals As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn concentrations using an ICP OES. The objective was to assist future activities of integrated solid waste management and soil pollution. Results showed different particle sizes comparing the input (44.6%) and the output MSW (75.1%) passing through the 100-mm sieve. Organic matter and ash contents indicated the influence of inorganic carbon due to the plastics' presence, with values varying between 6 and 13%. The pH values obtained were neutral and the electrical conductivity of the MSW rejects suggested a higher amount of ions, with values above 1000 mu S/cm. Metals analyses show that Cd, Cu, Ni, Pb, and Zn are present in high concentrations, depending on the types of the materials. Standard Proctor compaction curves yielded maximum dry unit weight varying from 6.6 to 10.0 kN/m(3) and optimum moisture contents from 20 to 42%. Cohesion ranged from 1.3 to 31.3 kPa and friction angle from 3.2 to 42.9 degrees. The results are comparable with those obtained for other countries using different MSW treatments and contribute to the data basis for MSW from the selective collection, aiming the integrated solid waste management, serving for other countries that adopt MSW sorting and recycling. (AU)

• FAPESP's process: 16/08978-8 - Characterization of MSW refuse in the municipality of São Paulo - SP
• Grantee: Giulliana Mondelli
• Support Opportunities: Regular Research Grants