A novel efficient bioflocculant QZ-7 for the removal of heavy metals from industrial wastewater |
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| Authors: | Zayed M M Abu Tawila Salmah Ismail Salem S Abu Amr Emad K Abou Elkhair |
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| Institution: | Institute of Biological Science, Faculty of Science, University of Malaya, 50603 Kuala Lumpur Malaysia, +60379672143 ; Biology Department, Faculty of Science, Al-Azhar University, Gaza Palestine ; Malaysian Institute of Chemical & Bioengineering Technology, Universiti Kuala Lumpur, (UniKL, MICET), 78000 Melaka Malaysia |
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| Abstract: | In this study, a novel bioflocculant QZ-7 was produced from Bacillus salmalaya 139SI for industrial wastewater treatment. Biochemical analysis, FTIR, scanning electron microscopy-energy dispersive X-ray spectroscopy, and thermogravimetric analysis were performed. A synthetic wastewater sample was used to validate the performance of the prepared OZ-7 for the adsorption efficiency of As, Zn2+ Pb2+, Cu2+, and Cd2+ under optimal experimental conditions such as initial metal concentrations, pH, contact time (h) and QZ-7 adsorbent dosage (mg mL−1). The maximum removal efficiency for Zn2+ (81.3%), As (78.6%), Pb2+ (77.9%), Cu2+ (76.1%), and Cd2+ (68.7%) was achieved using an optimal bioflocculant dosage of 60 mg L−1 at 2 h shaking time, 100 rpm and pH 7. Furthermore, the obtained optimum experimental conditions were validated using real industrial wastewater and the removal efficiencies of 89.8%, 77.4% and 58.4% were obtained for As, Zn2+ and Cu2+, respectively. The results revealed that the prepared bioflocculant QZ-7 has the capability to be used for the removal of heavy metals from industrial wastewater.In this study, a novel bioflocculant was produced using Bacillus salmalaya 139SI for industrial waste water treatment. |
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