Sorption capacity of lead (Pb) and cadmium (Cd) by artificially-induced soil constituents: Soil organic matter (SOM)

Dr Leonard Mgbeahuruike1

1Federal University Of Technology Owerri (futo), Owerri, Nigeria

Soil organic matter, along with other soil components, particularly clay minerals and the oxides of iron (Fe) and manganese (Mn) play vital roles in the speciation, bioavailability, and toxicity of metals in soil. Sorption capacities of lead (Pb) and cadmium (Cd) evidenced as deleterious to human health has been investigated from Peat Moss (PM) referred as organic matter and its complex with montmorillonite (MM) referred to as mineral clay in this context of study.

The sorption study focussed on the measurement of Pb and Cd at pH 5.0 and 5.3 on a batch technique for a single metal (SM) and multi-metal (MM) systems using ethylene diamine tetraacetic acid (EDTA). Results show that sorption capacity for both PM and its complexes (PM/MM) were found to vary for SM and MM systems. EDTA was most efficient in the leaching of Pb/Cd from PM/MM complex  by greater than 50%, while the sorption capacity of PM for Pb/Cd, relatively decreased by less than 25%, regardless of pH regime. This indicates that strong association between the metals and PM in the solid phase is evident which could be attributed to coordination with exposed hydroxyl group.

The relative contributions of organic matter and inorganic component of soil to contaminant sorption could provide a means of providing potential change in soil attributes due to environmental change and/or soil management practice.


I am Dr Leonard  Mgbeahuruike, an academic reseacher at federal university of Technology Owerri Nigeria. I am presenting before you

‘Sorption Capacity of Lead (Pb) and Cadmium (Cd) By Artificially-Induced Soil Constituents: soil organic matter (SOM)’

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