EGU2020-1056, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-1056
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Evaluation of the retention capacity of Pb and Cu in technosoils of Sustainable Urban Drainage Systems (SUDs) in Bogota, Colombia

Karel Aldrin Sanchez Hernandez1, Germán Ricardo Santos Granados2, Rafael Angulo-Jaramillo3, Carlos Alberto González Murillo4, and Catalina Lozada Lopez5
Karel Aldrin Sanchez Hernandez et al.
  • 1Colombian School of Engineering Julio Garavito, Civil Engineering emphasis Hydraulic Resources Msc, Bogotá, Colombia (karel.sanchez@mail.escuelaing.edu.co)
  • 2Civil Engineer PhD, Posgraduate Head of Colombian School of Engineering Julio Garavito, Bogotá- Colombia.(german.santos@mail.escuelaing.edu.co)
  • 3Université de Lyon; UMR5023 Ecologie des Hydrosystèmes Naturels et Anthropisés, CNRS, ENTPE, Université Lyon 1, Vaulx-en-Velin, France.(rafael.angulojaramillo@entpe.fr)
  • 4Hydrology Msc, National University of Colombian, Bogotá- Colombia.(cagonzalezmu@unal.edu.co)
  • 5Civil Engineer PhD, Posgraduate Colombian School of Engineering Julio Garavito, Bogotá- Colombia.(catalina.lozada@mail.escuelaing.edu.co)

Recently, cities growth has enhanced economic development but also generates different problems that affect the population such as stormwater drainage. It is known that the area available for water infiltration decrease in these urban centers generating scenarios of high vulnerability and risk of flooding associated with extreme weather events of precipitation. Therefore, an alternative is the implementation of Sustainable Urban Drainage systems (SUDs) that allows high efficiency in the control and local infiltration of rainwater. SUDs are often built with technosoils from the recycling of materials from different industries, for which it is necessary to study their hydraulic and solute retention properties. Indeed, one of the functions of SUDs must therefore be the retention of pollutants before they reach the groundwater. Therefore, this research aimed to evaluate the retention capacity of metallic solutes Pb and Cu in technosoils (compacted mixture of sand, loam and rice husk ash) proposed for SUDs in Bogota, Colombia. A research work was conducted by combining adsorption isotherms measurements, unsaturated column breakthrough flow experiments and numerical modeling with RETC, STANMOD and HYDRUS 1D models. Adsorption isotherm can be described satisfactorily using the Freundlich and Langmuir models. Additionally, unsaturated soil column leaching tests (ISO/TS S1268-3) allows estimation of solute diffusion through the soil profile. A multi-reaction model (MRM) and convection dispersion flow model reveal non-linear and non-equilibrium in the movement of solute in soil. Moreover, there is a competition for adsorption of metal ions in the technosoil profile; the order of selectivity of heavy metals in the active sites of the microporal network will be Pb+2> Cu+2, so that these technosoil is a favorable material in heavy metals retention.

 

 

How to cite: Sanchez Hernandez, K. A., Santos Granados, G. R., Angulo-Jaramillo, R., González Murillo, C. A., and Lozada Lopez, C.: Evaluation of the retention capacity of Pb and Cu in technosoils of Sustainable Urban Drainage Systems (SUDs) in Bogota, Colombia , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-1056, https://doi.org/10.5194/egusphere-egu2020-1056, 2019

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