Impacts of Leachate in Rice of Solid Waste Disposal Site of Roi-Et Municipality; Case Study: Heavy Metals

摘要

The study on impacts of Leachate in rice from waste disposal site where in the areas of Roi-et municipality landfill was conducted. Heavy metals were analyzed in Leachate, soil and rice tissues; root, stem, leaf and grains. Studied heavy metals were included Lead (Pb), Copper (Cu), Zinc (Zn) and Iron (Fe). Leachate samples were collected at different 3 locations whereas soils and rice were collected at the distance of 100, 500 and 900 m from the landfill site. The study showed that Fe was found at the highest level in Leachate, soil and rice tissue samples. All heavy metals were found in the rice tissues, except Cu. For all distances from the landfill, Zn was found in the root and stem tissues and Pb was observed in root tissues. Fe was observed in all plant tissues only at the distance of 100 m, however at the distances of 500 and 900 m, Fe content was found in root, stem and leaf tissues but not in the grains. Amount of heavy metals were found in rice tissues which can not toxic for rice. When compared Scotia in relation to the standard of heavy metals that can have food. From this study, heavy metal substances in the soil and rice depend on the distance from the landfill and type of heavy metal. The further distance from the landfill relatively varies with the amount of heavy metal decrease.