Retardation factors and dispersion-diffusion coefficients of heavy metals in construction and demolition waste

  • Débora Astoni Moreira Universidade do Estado de Minas Gerais - UEMG
  • Mauro Aparecido Martinez Universidade Federal de Viçosa - UFV
  • José Antonio Rodrigues Souza Universidade Federal de Viçosa - UFV
  • Antonio Teixeira Matos Universidade Federal de Viçosa - UFV
  • César Reis Universidade Federal de Viçosa - UFV
  • Flávia Mariani Barros Universidade do Sudoeste da Bahia - UESB
Keywords: landfill leachate, heavy metals, miscible displacement

Abstract

Considering the possibility of using the construction and demolition waste (CD) as "chemical barrier" to pollutants in landfill, the influence of the CD in the parameters of the transport of heavy metals in the leachate (leached + rainwater infiltrated) produced by urban solid waste newly collected was investigated. For this, three size fractions of CD (0.5 to 1; 2 to 4 and 4 to 7.5 mm) were used and leachate in the average concentrations of 0.146 mg L-1 for Cu, 0.046 mg L-1 of Cd, 17.2 mg L-1 Zn and 0.135 mg L-1 Pb. The results enabled to conclude that the magnitude of the retardation factors for the metals followed the sequence: Pb>Cu>Zn>Cd; the increase in granulation fractions in BD resulted in smaller retention factor.

Author Biographies

Débora Astoni Moreira, Universidade do Estado de Minas Gerais - UEMG
Bacharel em Química-Pós -Doutoranda Engª Agrícola
Mauro Aparecido Martinez, Universidade Federal de Viçosa - UFV
Professor titular DEA/UFV
José Antonio Rodrigues Souza, Universidade Federal de Viçosa - UFV
Engº Agrícola - Pós -Doutorando Engª Agrícola
Antonio Teixeira Matos, Universidade Federal de Viçosa - UFV
Professor Associado - DEA/UFV
César Reis, Universidade Federal de Viçosa - UFV
Professor Associado DEQ/UFV
Flávia Mariani Barros, Universidade do Sudoeste da Bahia - UESB
Engª Agronoma, Ds Engª Agrícola
Published
26/08/2010
Section
Papers