Evaluation Biosorption and Recovery of Zn, Cr And Ni Ions From Industrial Wastewater Using Beads of Banana Peel Powder Constrained by Calcium Alginate


Abstract- Plant wastes have been successfully applied as biosorbentmaterials of several heavy metal ions from industrial wastewater due tothe obvious capability of removing significant quantities of heavy metalions. In the current work, banana peel powder was constrained bycalcium alginate for polymerization and bead formation and subjectedto both biosorption and recovery processes of Zn, Cr and Ni ions fromuntreated wastewater, collected from general state electricalmanufacturing company in Baghdad-Iraq, using designed laboratorytreatment unite. It has been found that the capacity of immobilizedbanana peel was significantly higher in bioremoving Zn, Cr and Ni ionsthan that of calcium alginate where mean biosorption capacities of Zn,Cr and Ni ions was 74.0 ± 2.3 mg/l, 83.0 ± 0.0 mg/l and 71.0 ± 1.8 mg/lrespectively while in case of calcium alginate, these values were 25.0 ±2.2 mg/l for Zn 34.0 ± 1.3 mg/l for Cr and 19.0 ± 0.9 mg/l for Ni. Thisstudy has found that biosorption capacities of heavy metal ions byimmobilized banana beads, used in laboratory treatment unite, fromindustrial wastewater was much efficient where this lab designed unitehad shown significant capacity of such beads in bioremoving allexamined heavy metal ions by giving higher biosorption capacitieswhich were 86.6 % in case of Zn ions and 100% for both Cr and Niions. In the recovery of these heavy metal ions from biosorbentimmobilized banana beads, it was found that the percentages ofrecovered metal ions, from these beads used in laboratory unite, werevery high ranging from 88.0 % in case of Cr ions to 90.5% for Zn ionswhile this recovery percentage was 88.7% for Ni ions