Assessment of Heavy Metal Distribution in Soil and Groundwater Surrounding Municipal Solid Waste Dumpsite in Nai Muang Sub-district Administrative Organization, Amphur Phichai, Uttaradit

Abstract

The open dumpsite of Nai Muang Phichai Sub-district Administrative Organization, Amphur Phichai, Uttaradit Province is the one of words disposal site in Thailand that becomes to the sources of environmental pollution. The leachate from dumpsite usually contains high concentration of heavy metals that effect to environment and human health. The study was determined the heavy metals in the soil and groundwater at dumpsite surrounding areas for assessment the heavy metal contents and distributions. The results obtained indicated the following ranges for the metal in the dumpsite soil: 0.51-0.98 mg/kg of Cd, 1.22-8.78 mg/kg of Pb, 8.33-22.40 mg/kg of Cu, 25.14-75.75 mg/kg of Zn and 869.04-948.83 mg/kg of Fe. For the heavy metal content at surrounding soils ranged between 0.13-0.73 mg/kg of Cd, 1.22-12.69 mg/kg of Pb, 2.27-17.35 mg/kg of Cu, 11.16-34.15 mg/kg of Zn and 782.47-938.28 mg/kg of Fe. These values were found to be below the critical permissible concentration of soil quality standard. The groundwater resources, the results indicated that they are suitable for domestic purposes but it is not suitable for drinking purpose. Each heavy metal is classified into portable, within permissible limits. Except for iron concentration which is detected to be above the maximum permissible range, this is generally not suitable for consumption. The concentration of Cd, Pb, Cu, Zn and Fe in groundwater ranged between BDL-0.01, BDL-0.01, BDL-0.08, 0.03-2.38 and 0.53-9.36 mg/L, respectively.Keywords: municipal solid waste, open dumpsite, heavy metal, soil, groundwaterINTRODUCTION