Ecological and Health Risk Assessment of Heavy Metals Contamination Solid Waste Dumpsite Soil in Igando, Lagos State

Chioma Vivian Abiaziem, Sosanya Peter, & Islamiyat Adenike Ojelade , Volume 3 Issue 2, December 2022 Pages 181-192, Published: 2022-12-22

Abstract

soils. Hence, this work targeted to determine the ecological and health risk assessment of some designated heavy metals; As, Cd, Cr, Cu, Pb, Zn, Ag and V in solid waste dumpsite in Igando. Five soil samples were collected from different points of the study site while the control sample was collected about 1 km away from the study site from a depth of 0-15 cm. The sample was digested using 3:1 ratio of HNO3 and HCl and was analyzed using inductively coupled plasma-optical emission spectrophotometer (ICP-OES). The mean concentration of the heavy metals recorded in the soil samples were; 20.09 ± 35.97 Cd, 38.17 ± 24.83 Cr, 42.06 ± 50.41 Cu, 57.40 ± 40.93 V, 63.24 ± 37.60 As, 161.57 ± 145.8 Pb and 1865.7 ± 24 mg/kg for Zn, respectively, silver was not detected. Pb and Zn were exceeding the tolerable limits reported by WHO while other metals were within the WHO limits. The ecological risk assessments; contamination factor, degree of contamination, geo-accumulation index, pollution load index, and the ecological risk index were calculated and was indicated to be low contamination aside for Zn whose concentration was a moderate risk; the health risk assessment which includes average daily dose through ingestion, inhalation and dermal, hazard quotient, hazard index and cancer risk was also calculated and it indicated a low risk of contamination. Hence, there is a necessity for continuous checking and sanitizing of the dumpsite before using the dumpsite for water and agricultural purposes.