Evaluation of a novel dextran-based flocculant on treatment of dye wastewater: Effect of kaolin particles.
作者： Chuanliang Zhao , Huaili Zheng , Yongjun Sun , Shixin Zhang , Jianjun Liang
DOI: 10.1016/J.SCITOTENV.2018.05.286
关键词:
摘要: Abstract Graft modified flocculants have recently received increasing attention in the field of water treatment as they combinative advantages synthetic and natural polymeric flocculants. In this work, surface-active monomer benzyl(methacryloyloxyethyl)dimethylammonium chloride (BMDAC) was selected to graft on dextran (DX) with high molecular weight (10.3 × 106 g/mol) produced through enzyme-catalyzed process order remove dissolved dyes from wastewater. The flocculant (DAB) fabricated by ultrasound initiated polymerization technique, structure characterization FTIR, 1H/12C NMR, XRD XPS spectrum confirmed successful grafting. Then Congo red (CR) removal efficiency DAB optimized based flocculation conditions, including wastewater initial pH, dosage dye concentration. effect suspended solids evaluated kaolin-CR simulated results indicated that optimal CR 68.1% 88.2% single system, respectively. improvement attributed fact partial molecules were adsorbed onto kaolin particles before flocculation, synergistically flocculated accompanied particles. Finally, mechanism discussed a detailed investigation zeta potentials, FTIR spectra flocs, which can provide important reference for optimizing conditions designing novel high-performance
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