Author : Ali Awan*
Heavy metals such as mercury (Hg) and cyanide is extremely harmful to living things, especially humans as well as the influence on the surrounding environment for it can cause pollution. The use of hazardous materials has been used for a long time, especially in the gold mining area on the bald mountain (Gunung Botak) in Buru Island. The use of these hazardous materials greatly affect the quality of the environment and the surrounding paddy fields, due to residues of these hazardous substances are difficult to decompose in nature and can cause biological magnification (biomagnification), which would be detrimental to humans as the highest consumers. This study was conducted to determine the impact of heavy metal residues of mercury (Hg) and Cyanide to environmental quality in rice cultivation by using macrozoobenthos as bioindicator. The study was conducted in the Buru Island Transmigration rice field. Sampling was done by purposive sampling as much as 7 example. The results showed that in locations 1 to 4 locations (mining area) there is no one macrozoobenthos, both from Family to the species. As for the station, 5-7 found 15 species of macrozoobenthos of 4 phylum, the phylum Annelida consisting of 2 classes (Oligochaete and Gnathobdellida), phylum Mollusca consisting of one class (Gastropod), arthropod phylum consisting of one class (Insecta) and phylum arachnid. The occurrence of benthic animal species diversity index in the study area, which means that the quality of the marine environment, including the aquatic environment, is heavily polluted. Residue analysis of heavy metals mercury (Hg) and cyanide to land and water in the rice fields and areas of the bald mountain (Gunung Botak), showed heavy contamination. This can be proved by dying livestock farmers, contamination of marine life and the death of horticulture crops. Key words: Impact residues, heavy metals, macrozoobenthos, Buru Island.
Dr. Arend L Mapanawang, Sp.PD, FINASIM, PhD