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Processes 2019, 7(2), 108;

Flocculation of a High-Turbidity Kaolin Suspension Using Hydrophobic Modified Quaternary Ammonium Salt Polyacrylamide

School of Civil Engineering and Architecture, Anhui University of Technology, Maanshan 243002, China
Engineering Research Center of Biomembrane Water Purification and Utilization Technology, Ministry of Education, Maanshan 243002, China
Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China
Department of Civil Engineering, Sichuan University of Science and Engineering, Zigong, 643000, China
Author to whom correspondence should be addressed.
Received: 25 January 2019 / Revised: 11 February 2019 / Accepted: 12 February 2019 / Published: 18 February 2019
(This article belongs to the Special Issue Wastewater Treatment Processes)
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In this work, a novel cationic polyacrylamide (PAMD) was synthesized by acrylamide (AM) diallyl dimethyl ammonium chloride (DMD) and dodecyl polyglucoside (DPL) under low-pressure ultraviolet (UV) initiation. The intrinsic viscosity and cationic degree of PAMD were optimized in copolymerization. The optimum synthesis conditions that affect polymerization were determined to be solid content 30%, DPL content 25%, DMD content 30%, illumination time 135 min, and pH 9. The flocculation performance of flocculant PAMD with a high cationic degree was investigated in the purification of high-turbidity water. The flocculation mechanism was correspondingly studied and summarized based on Fourier transform-infrared (FTIR) analysis. Finally, the results of an experimental simulation using the response surface method show that 98.9% supernatant transmittance was achieved under dosage 4 mg/L, fast stirring time 20 min, pH 7, and stirring speed 320 rpm. View Full-Text
Keywords: high turbidity; kaolin; hydrophobic; quaternary ammonium salt; polyacrylamide high turbidity; kaolin; hydrophobic; quaternary ammonium salt; polyacrylamide

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Ma, J.; Fu, X.; Xia, W.; Fu, K.; Liao, Y. Flocculation of a High-Turbidity Kaolin Suspension Using Hydrophobic Modified Quaternary Ammonium Salt Polyacrylamide. Processes 2019, 7, 108.

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