Removal of lead (Pb) by Hybrid Constructed Wetland with enhanced treatment by Bio coagulant (Moringa oleifera) and Low Cost Adsorbent (Charcoal) [ ]


In this study, Hybrid constructed wetlands were used to remove lead (Pb) with pre-treatment by Bio coagulation with Moringa oleifera (MO) seed extract. Performance of vegetated Horizontal Surface-Flow (Eichhornia crassipes) and Vertical Flow Wetlands (Canna indica) were evaluated. Finally the effluent from the wetland system was subjected to Adsorption by Charcoal Gravity Filter. Hourly analysis of lead concentration in cultivation sample for both Horizontal flow system and vertical flow system were done by Atomic Adsorption Spectrophotometer. The Optimum dosage of Bio coagulant extract of Moringa oleifera was found to be 20 mg/litre, with removal efficiency of 79.3 %. The Optimum Removal efficiency was found to be 16.5% by Eichhornia crassipes and 96.5% by Canna indica, with a detention period of 1 hour. The removal efficiency of lead with Activated charcoal column filter was 99.99%. The overall performance of the Advanced Hybrid Wetland system was found to be 99.99% in removal of lead (Pb). The concentration of Lead was determined by Atomic Adsorption Spectrophotometer (AAS-201).