Abstract:
PT. Tri Bakti Sarimas (TBS) coals mining at Kuantan Singingi Regency have produced
liquid waste that containing of hazardous heavy metals. The company has made four
ponds as water treatment. Efficiency of waste treatment installation (IPAL) from this
industry could be determined by identificating the content of heavy metals (Mn and Cd), cyanide and nitric contents at liquid waste reservoir inlet and outlet. Determination of Mn and Cd in this research is done by using Atomic absorption spectrophotometer (AAS), while UV-Vis spectrophotometer is used to analyze for CN- and NO2-. Mn, Cd, cyanide and nitric contents at inlet were 7,952; 1,980; 0,045; and 0,333 mg/L respectively. Mn, Cd, cyanide and nitric contents at outlet were 3,333; 0,120; 0,018 mg/L respectively with no cyanide detected. Waste water treatment by using the method of dolomite as an adsorbent in PT. TBS have shown the remarkable result of efficiency, especially for Cd with removal percent 93,939%.
