Penurunan bahan pencemar dalam air limbah samak krom dengan eceng gondok (Eichornia crassipes Solms)

This research is meant to know the capability of Eichornia crassipes in reducing pollutant in chrome tanning waste water. E. crassipes having the same condition was collected from a pool in Gambiran, Yogyakarta. Then those plants were put down into the media contaning chrome tanning waste water with 0, 5, 10, 15 and 20 ml per litre ground water. The chrome tanning waste water was taken from Leather Tanning Process Labolatory, IRDLAI, Yogyakarta. Based on laboratory research it was found that E. crassipes was able to reduce pollutant in chrome tanning waste water ranging from 2.5 up to 87%. Those values were as follows : COD : 2.5 ? 41%; C1 : 14 ? 63.5%; S:44-87% total Cr : 55.5 ? 77% and total Cr : 55.5 ? 77%. E. crassipes which had decrease efficiency of C1, S and Cr effectively were the treatments using chrome tanning waste water with 5, 10 and 15 ml per litre ground water.