Bioremoval of Heavy Metals (Mn, Pb, Zn) from Wastewater Chemistry Laboratory, Satya Wacana Christian University Using Water Fern (Azollapinnata R.Br.)
The objective of this study were: Firstly,to determine the optimal absorption of manganese (Mn), zinc (Zn) and lead (Pb) based on determined the optimum of Water Fern (A. pinnata) population densities, and secondly to determine the effectiveness of Mn, Zn and Pb absorption by different population densities of A. pinnata. The waste water obtained from Chemistry Laboratory, Satya Wacana Christian University, Salatiga. Heavy metals analysed in plants and in waste water were measured using AAS (Perkin Elmer, 3110). Data were analysed by Randomized Completely Block Design (RCBD), 6 treatments and 4 replications. As the treatments were various percentage surface area coverage of the plastic cups by A. pinnata, which were: 0%, 12.5%, 25%, 37.5%, 50%, and 62.5%, respectively. To test the differences between treatment means, the Honestly Significant of Differences (HSD) were used with 5% level of significant. The result of this study showed that : Firstly, optimal absorption of manganese (Mn), zinc (Zn), and lead (Pb), respectively, could be performed by 62.5% population densities of A. pinnata. Secondly, within 4 days effectively of A. pinnata absorb heavy metals were as follow: Mn 95.11%; Pb 90.90%, and Zn 87.04%.