Volume 16 Issue 1
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Title : Determination of Potential Heavy Metal Contents in Peat in Selected Agriculture areas in Sepang, Selangor, Malaysia
Authors : Kabir Kayode Adebayo, Roslan Bin Ismail,Olatunji Olayinka, Eliza Azura Azman, Monsuru Adekunle Salisu
Abstract :
Peat soils are acidic in nature and deficient in nutrients particularly Cu, Zn, Fe and B. Liming materials and agro-chemicals are widely used as soil amelioration toenhance the growth of crops.Therefore, the study was conducted to determine the concentration and distribution status of some selected heavy metals (Cu, Zn, Pb, Mn, Fe, As and Cd), sources, possible effect on crops when compared with the permissible concentrationin any agricultural land.This study was conducted on a farm located in Sepang district Selangor, Malaysia. The soil type comprises of peat and a mixture of peat and mineral soil underlying the peat. Soil samples were collected usinga systematic grid (3 m by 3 m).150 soil samples were collected at 5 different depths (0-20 cm, 20-40 cm, 40-60 cm, 60-80 cm and 80-00 cm) across the farm using a hand auger Soil analysis for Soil pH, Soil Organic Carbon and Soil Heavy metals were conducted using appropriate methods.Results showed that the soil in the study area is very strongly acidic to a strong acidic (3.03- 4.46). Soil Organic Carbon ranged from 9.30 % to 17.64 % with a decreasing value down the soil profile. The total content of Zn and Mn were above the WHO permissible limit at 60 cm (53.59 mg/kg), (52.66 mg/kg) respectively. The available micronutrients were all above the critical limit at all depths, and the concentration of the available micronutrients was in the following decreasing order i.e Fe>Mn>Zn>Cu.The results showed a significant difference with varying depth and the source of the heavy metals were related to thenatural and anthropogenic sources. Results also revealed that the soil in the study area does not indicate serious contamination by heavy metals.
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