A novel efficient bioflocculant QZ-7 for the removal of heavy metals from industrial wastewater
Document Type
Article
Publication Date
1-1-2019
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. © 2019 The Royal Society of Chemistry.
Keywords
Bacteriology, Energy dispersive spectroscopy, Fourier transform infrared spectroscopy, Heavy metals, Industrial water treatment, Scanning electron microscopy, Thermogravimetric analysis, Wastewater treatment
Divisions
InstituteofBiologicalSciences
Funders
University of Malaya, UMRG Programme under Grant No. RP023A-14 AFR
Publication Title
RSC Advances
Volume
9
Issue
48
Publisher
Royal Society of Chemistry