Yusaimee, Nur Shuhada (2015) Content of heavy metals in the soil of agricultural areas: case study at Bachok, Kelantan, Malaysia. Project Report. Universiti Sains Malaysia. (Submitted)
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Abstract
It is important to realise that the soil is both a source of metals and also a sink for contaminants. The factors controlling the total and bioavailable concentrations of metals in soils are of great importance with regard to both human toxicology and agricultural productivity. The objective of this study was to determine the content of heavy metal Copper (Cu), Chromium (Cr), Cadmium (Cd), Lead (Pb) and Manganese (Mn) in the soil of agricultural areas at Bachok, Kelantan. A total of 30 samples were collected at a depth of 0-20 cm using a soil sampler. All samples were dried and undergo acid digestion prior to analysis using Atomic Absorption Spectrometry (AAS). The finding shows that the heavy metals concentration in soil of paddy area is in order of Pb>Cr>Cu>Cd>Mn with average concentration of 0.319, 0.065, 0.037, 0.013 and 0.009 mg/L and the heavy metals concentration in soil of vegetable area is in order of Mn>Pb>Cr>Cd>Cu with average concentration of 0.226, 0.153, 0.107, 0.006 mg/L and no detection of concentration of Cu. However, the heavy metal concentration is still below the standard limit of Department of Environmental (DOE), Malaysia. Although the results of heavy metals concentration in soil of agricultural areas are within the safe limits, further research can be carried out to identify the source of heavy metals in soil of agricultural areas. Thus, proper treatments can be taken to reduce soil contamination and to keep sustainable agricultural development.
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