KANDUNGAN PB, CD DAN CU PADA ECENG GONDOK (EICHORNIA CRASSIPES) PADA PERAIRAN SUNGAI KARANG MUMUS SAMARINDA KALIMANTAN TIMUR

River is one of the sources of water that has long been used by humans for various activities in supporting life. But in line with development, many river functions are increasingly diverse. The decline in river quality is caused by the inclusion of various waste wastes from various human activities, causing a change in the physical, chemical, biological and aesthetic quality of the river.The purpose of this study was to determine Pb, Cd and Cu contents in Hyancinth plant (Eichornia crassipes) in Karang Mumus Samarinda Kalimantan Timur. The determination of sampling station was based on purposive sampling. The stations are : station 1 (Waduk Benanga), Station 2 (Inpres Bridge) and Station 3 (Gelatik Bridge). The main parameters are the contentrations of heavy metals Pb, Cd and Cu in water, sediment and Hyacinth. Parameter supporting of water quality in were : temperature, pH, DO, turbility and current velocity. Concentration of Pb, Cd and Cu in water only detected in station 1 (Pb 0,0003 mg/L. Cd 0,001 mg/L. Cu 0,004 mg/L). The highest concentration of Pb and Cu in sediment was in station 2 (12,05 mg/Kg – 15,876 mg/Kg) while concentration Cd was detected in station 3 (0,262 mg/Kg). The highest concentration Pb in Hyacint plant was detected in station 2 (0,0915 mg/Kg) and the highest consentration Cu was detected in station 1 (0,2125 mg/Kg). Meanwhile, concentration of Cd at all stations were under the detection limit AAS (<0,002 mg/Kg).