KEMAMPUAN ENCENG GONDOK DALAM MENURUNKAN KADAR Cr(VI) PADA LIMBAH DENGAN SISTEM AIR MENGGENANG DAN AIR MENGALIR

Herman Yoseph Sriyana

Abstract

The present research was aimed to identify the capability of the water hyacinth (Eichhornia Crassipes) to reduce the contents of Cr(VIwastes through non flowing- and flowing-water systems.  Reducing of Cr(VI) contents in waste water by the water hyacinth in a non-flowing system were carried out by introducing Cr(VI) waste with concentration of 20 ppm into the water hyacinth pond. The Cr(VI) contents were measured daily during 15 days using Atomic Absorption Spectrophotometer (AAS)  measuring device. Reduced Cr(VI) contents by the water hyacinth in the flowing water system were done by flowing the Cr(VI) wastes with concentration of 20 ppm, from the container at the waste inlet into the water hyacinth pond, then leaving through the outlet of the water hyacinth pond into the container at waste outlet. The Cr(VI) contents in waste water concentrations were measured at the waste outlet using the AAS measuring device, daily for a 15 days.   The results indicated that the water hyacinth in the non-flowing water system was capable to absorb Cr(VI) with an absorption average rates of 64,6 mg/kg water hyacinth/day, respectively. The water hyacinth in the flowing water system was capable to absorb  Cr(VI)  matters  for 15 days with absorption average rate of 84,8 mg/kg water hyacinth/day, respectively. The absorption of Cr(VI) by the water hyacinth in the flowing system was greater than the absorption by the water hyacinth in non-flowing system.

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DOI: https://doi.org/10.20961/ekuilibrium.v6i2.49612

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