Mathematical modeling and numerical simulation technique for selected heavy metal transport in MSW dumpsite.

Autor: Usoh GA; Department of Agricultural Engineering, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria., Ahaneku IE; Department of Agricultural and Bioresources Engineering, Michael Okpara University of Agriculture, Umudike, Nigeria., Ugwu EC; Department of Agricultural and Bioresources Engineering, Michael Okpara University of Agriculture, Umudike, Nigeria., Sam EO; Department of Agricultural Engineering, Akwa Ibom State University, Ikot Akpaden, Mkpat Enin, Nigeria., Itam DH; Department of Civil and Environmental Engineering, University of Calabar, Calabar, Cross Rivers State, Nigeria., Alaneme GU; Department of Civil Engineering, Kampala International University, Ggaba Road, Box 20000, Kampala, Uganda. tinz2020@gmail.com., Ndamzi TC; Department of Agricultural and Environmental Engineering, Rivers State University, Port Harcourt, Nigeria.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Apr 07; Vol. 13 (1), pp. 5674. Date of Electronic Publication: 2023 Apr 07.
DOI: 10.1038/s41598-023-32984-9
Abstrakt: The study focused on development of mathematical modeling and numerical simulation technique for selected heavy metal transport in Uyo municipal solid waste dumpsite in Akwa Ibom State to investigate the level in depth to which leachate from the dumpsite extends and the quantity of leachate at various depth of the dumpsite soil. Uyo waste dumpsite is operating open dumping system where provisions are not made for preservation and conservation of soil and water quality, hence, the need for this study. Three monitoring pits within Uyo waste dumpsite were constructed and infiltration runs were measured, and soil samples were collected beside infiltration points from nine designated depths ranging from 0 to 0.9 m for modeling heavy metal transport in the soil. Data collected were subjected to descriptive and inferential statistics while the COMSOL Multiphysics software 6.0 was used to simulate the movement of pollutants in the soil. It was observed that heavy metal contaminant transport in soil of the study area is in the power functional form. The transport of heavy metals in the dumpsite can be described by a power model from linear regression and a numerical model based on finite element. Their validation equations showed that the predicted and the observed concentrations yielded a very high R 2 value of over 95%. The power model and the COMSOL finite element model show very strong correlation for all selected heavy metals. Findings from the study has identified level in depth to which leachate from the dumpsite extends and the quantity of leachate at various depth of the dumpsite soil which can be accurately predicted using leachate transport model of this study.
(© 2023. The Author(s).)
Databáze: MEDLINE
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