Evaluation Of Sorption Behavior Of Immobilized Karkashi Leaves (Sesamum Indicum) On Pb2+, Cu2+And Zn2+ In Aqueous Solution

The sorption capacity of Immobilized karkashi leaves (IKAL) for the removal of metal ions (Pb2+,Cu2+and Zn2+) were studied using batch experiments. The residual metal ion concentrations were investigated using atomic absorption spectrophotometer (AAS). The influence of factors such as contact time, initial concentration,ionic strength, pH and temperature were investigated. The metal ion sorption capacity by IKAL decreases with increasing ionic strength but increases with increasing pH values and initial metal ion concentration. The sorption rate for the metal ions (Pb2+, and Cu2+) was rapid and reached equilibrium within first 30 minutes while equilibrium was established within 1hr for Zn2+. The maximum sorption capacity for Pb2+, Cu2+and Zn2+were found to be 80.75%, 40.60% and 39.55% respectively. From this study the sorption capacity of IKAL sorbent showed that the abundantly wasted Karkashi leaves could be turned into an environmentally friendly and cost effective sorbent for the removal of heavy metal ions from wastewater.

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