KADAR LOGAM BERAT DI LINGKUNGAN WILAYAH TAMBANG, NUSA TENGGARA BARAT (Heavy Metals Concentration In Mining Area At West Nusa Tenggara)

<p>The aim of research on heavy metals concentration in mining area at West Nusa Tenggara is to find out about environmental pollution caused by the mining activities. The research was done by analyzing heavy metals, such as As, Hg, Cd, Cu, Fe and Mn in river water, sediment, drinking water, fish, oyster, com, and vegetables using Atomic Absorption Spectrophotometer (AAS). The result shows that heavy metals concentration in river water and sediment are still in normal range according to River Quality class D on PP 20/1990. Heavy metals concentration in drinldng water is at normal range according to Regulation of the Ministry of Health (Permenkes) 907/2002 except for Mn from Sekongkang and Benette. Heavymetals in fish are normal according to regulation of the ministry of health specifically on Food and Drug No. 03725/B/SK/VII/89 except for As. Mean rate of As in fish and oyster around the mine is 0.959 mg/kg and 53.278 mg/kg. From the control area, mean rate for As is 1.666 mg/kg (Regulation of the Ministry of Health special on Food and Drug standard is 1.0 mg/kg). Heavy metals in rice, com, and vegetables are stillin normal range except for Cu in vegetables. Mean rate for Cu in vegetables at mining and control area are 6.116 mg/kg and 6.000 mg/kg (Regulation of the Ministry of Health specifically on Food and Drug standard is 5.0 mg/kg). Further research in heavy metals monitoring, especially in water and fish is needed.</p><p>Keywords: heavy metals, environment, mining