Effect of Calcium Oxide-Carbonized Lophira Alata Sawdust Nanocomposite (COCLASN) in Immobilizing Cadmium and Lead in Contaminated Soil
2022
Moses, Okponmwense | Oyibo, Oghenenyerhovwo Dorcas
Heavy metal polluted soil has turn out to be of global environmental concern that has involved significant unrestricted responsiveness. This study seeks to assess the effect of calcium oxide-carbonized lophira alata sawdust nanocomposite (COCLASN) in immobilizing cadmium and lead contaminated soil from Evbareke spare parts market. Contaminated soil samples were collected from Evbareke spare parts market, Benin City, Edo state Nigeria. Calcium carbide waste was collected from a panel beating workshop located at Isiohor, Edo State. The soil was physicochemical characterization. The lead and cadmium ion in soil sample was verified using Fractionation procedures. COCLASN was prepared by co-precipitation procedure. The COCLASN was characterized using FT-IR, SEM and XRD. The optimum amount of COCLASN composite for the remediation of the contaminated soil was at 3% w/w for lead contaminant and <1% w/w for cadmium contaminant. The COCLASN effectively reduced the lead and cadmium ions in the soil by insitu adsorption and complexation remediation pattern, thereby making it less accessible for uptake by plants hence reducing its transmission to man and animals. The immobilization efficiency and immobilization capacity of the COCLASN composite indicated its effectiveness in reducing lead and cadmium ions accessibility in the contaminated soil to plants.
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