Publisher: Bachudo Science Co. Ltd

The Effect of Quarrying On Soil and Vegetation In Akamkpa Local Government Area of Cross River State, Nigeria

E. C. Nzegbule, F. Ekpo
KEYWORDS: Quarry, Soil and vegetation

ABSTRACT:

The impact of tailing waste from quarry operations on the soil and vegetation in Akamkpa Local Government Area, Cross River State were investigated. The selected sampling areas (0 km, 0.75 km and 2 km or control ) were delineated based on the intensity of exposure to tailings and distance from the quarry Samples of the extracted material (chippings) was analyzed to ascertain the chemical composition. Samples of the soil (0-5cm), fodder species Alchornea cordifolia and Aspilia africana. edible fruit Carica papnya and Manglfera indica as well as root and tuber species Menft,ot esculenta and Colocasia esculenta were collected separate!y from each of the sampling area and analyzed for chemical characteristics. From the rock material, the concentrations of Cu, Pb, Zn, Fe, Cd, Ni, Cr and Mn in quarried materials (Chippings) were 9.28, 1.88, 10.64, 349.50, 2.06, 3.22, 1.12, and 2.44 (mg/kg) respectively. Quarry activities in Akamkpa affected the levels of Pb, Cu, Zn, Fe, Mn, Ni and Cd in the soil as these element had significantly higher concentrations in the soils collected from the immediate vicinity of the quarry (0 km). Also the concentrations of the metals in the plants leaves within the quarryirig site were significantly higher (P<0.01) than that of the control (2 km). The concentrations of Zn, Cu and Ni in leaves of Mangifera indica collected from the farthest sampling position fromthe quarry were lower by 81%, 63.04% and 51.93% respectively than that collected from immediate vicinity of the quarry sile. Quarry operation is causing increasing building of trace metals in the soils and vegetation in Akamkpa Local Government Arca of Cross river State. Thus, the operations of the quarry industry need to be regulated to reduce the health risk the practice poses to the local populace.   


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