DSpace Repository

Effective use of iron-aluminum rich laterite based soil mixture for treatment of landfill leachate

Show simple item record

dc.contributor.author Nayanthika, L.V.K.
dc.contributor.author Jayawardana, D.T.
dc.contributor.author Bandara, N.J.G.J.
dc.contributor.author Manage, P.M.
dc.contributor.author Madushanka, R.M.T.D.
dc.date.accessioned 2018-04-26T04:31:29Z
dc.date.available 2018-04-26T04:31:29Z
dc.date.issued 2018
dc.identifier.citation Nayanthika, L.V.K., Jayawardana, D.T., Bandara, N.J.G.J., Manage, P.M., Madushanka, R.M.T.D. (2018). "Effective use of iron-aluminum rich laterite based soil mixture for treatment of landfill leachate", Waste Management, pp. 1-15 en_US, si_LK
dc.identifier.issn 0956-053X
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/6969
dc.description.abstract Attached en_US, si_LK
dc.description.abstract Landfill leachate poses environmental threats worldwide and causes severe issues on adjacent water bodies and soil by direct discharge. The primary objective of this study is to analyze the efficient use of compost and laterite mixtures (0, 10, 20, 30 and 40 wt% compost/laterite) on leachate treatment and to investigate the associated removal efficiencies under different sorption processes. Therefore, in the experimental design, laterite is used for providing adsorption characteristics, and compost for activating biological properties of the filter. The filtering process is continued until major physical changes occur in the filter at approximately 100 days. The raw leachate used for the experiment shows higher average values for many analyzed parameters. Parameters for the experiment are selected based on their availability in raw leachate in the Sri Lanka. During filtering, removal efficiencies of BOD (>90%), COD (>85%), phosphate (>90%) and nitrate (75–95%) show higher values for all filters. These removals are mainly associated with biodegradation, which is activated by the added compost. Perhaps the removal of nitrate steadily increases with time, which indicates in denitrification by the added excess carbon from the leachate. The removal of total suspended solids (TSS) is moderate to high, but conversely, the electric conductivity (EC) is unsteady, indicating an association between iron exchange and carbonate degradation. A very high removal efficiency is reported in Fe (90–100%), and wide ranges of efficiencies in Mn (30–90%), Cu (45–85%), Ni (30–93%), Cd (37–98%), Zn (15–98%), and Pb (35–98%) involve heterogeneous sorption processes. Furthermore, the normalization of raw leachate by the liquid filtrate has apparent improvements. The differences (p > .05) in removal efficiencies between the filters are significant. It can be concluded that the filter with laterite mixed with 20% of compost has the optimum conditions. Further, the Fourier-transform infrared (FT-IR) models for filter media conclude multiple sorptions and reveal evidence on vacant sites. X-ray diffraction (XRD) analyses indicate secondary minerals gibbsite, hematite, goethite and kaolinite as the major minerals that involved on the sorption process
dc.language.iso en_US en_US, si_LK
dc.publisher Waste Management en_US, si_LK
dc.subject Laterite en_US, si_LK
dc.subject Compost en_US, si_LK
dc.subject Leachate en_US, si_LK
dc.subject Sorption en_US, si_LK
dc.subject Filtration and efficiency en_US, si_LK
dc.title Effective use of iron-aluminum rich laterite based soil mixture for treatment of landfill leachate en_US, si_LK
dc.type Article en_US, si_LK


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account