Assessment and Comparison the Environmental Pollution Status of Heavy Metals from Landfills of Sa Kaeo and Trat province in Special Economic Zones (SEZ) of Thailand Eastern Region

Abstract

The purpose of this research was to study the environment surrounding the sanitary landfill according to the environmental quality index and to assess the status of environmental pollution affected by landfills in the eastern border provinces: 3 places in Sa Kaeo provinces and 2 places in Trat provinces in the Public Region 6. The environmental indexes on heavy metal for surface water resources soil pollution and air pollution, and environmental samples were taken for laboratory analysis and field measurements. The results showed that the environmental quality index for surface water quality and the soil pollution index around the 5 landfill sites regarding arsenic (As) cadmium (Cd) chromium (Cr) lead (Pb) and manganese (Mn) passed all criteria in environmental status score of surface water resources and soil pollution with the score of 1 which was considered as perfect natural state. However, the level of sulfur dioxide (SO2 ) was high; while carbon monoxide (CO), methane (CH4 ), all passed the criteria. In addition, the environmental score of air quality was 0.75 which was classified as a warning condition. The suggestion obtained from this research are that there must be the measures for air pollution surveillance and monitoring for soil pollution and surrounding landfills which need to be concurrently continued for environmental quality in both aspects; and measures should be established to screen for heavy metal waste by focusing on campaign for public and private sectors to separate waste containing chemicals and hazardous substances.