1. Removal of both cationic and anionic contaminants by amphoteric starch
- Author
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Muqun Yang, Hongfei He, Songxiong Zhong, Xiaosheng Yao, Qianjun Liu, Huanlong Peng, Qintie Lin, Zhuoying Liang, and Guangcai Yin
- Subjects
Flocculation ,Chromatography ,Polymers and Plastics ,Chemistry ,Starch ,Organic Chemistry ,Cationic polymerization ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Phosphate ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,Chemical engineering ,Wastewater ,Materials Chemistry ,Ammonium ,Turbidity ,0210 nano-technology ,Dispersion (chemistry) - Abstract
A novel amphoteric starch incorporating quaternary ammonium and phosphate groups was applied to investigate the efficiency and mechanism of cationic and anionic contaminant treatment. Its flocculation abilities for kaolin suspension and copper-containing wastewater were evaluated by turbidity reduction and copper removal efficiency, respectively. And the kinetics of formation, breakage and subsequent re-formation of aggregates were monitored using a Photometric Dispersion Analyzer (PDA) and characterized by flocculation index (FI). The results showed that amphoteric starch possessed the advantages of being lower-dosages-consuming and being stronger in shear resistance than cationic starch, and exhibited a good flocculation efficiency over a wide pH range from 3.0 to 11.0.
- Published
- 2016
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