Journal
RSC ADVANCES
Volume 7, Issue 1, Pages 208-217Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra25245a
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Funding
- National Natural Science Foundation of China [21477010]
- 111 Project [B13041]
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Micro-block cationic polyacrylamide (P(AM-MAPTAC)) was synthesized through UV-initiated template copolymerization and characterized by FTIR, H-1 NMR, SEM and TG/ DSC analyses. Furthermore, the main influence factors of the preparation process were optimized through Box-Behnken experiment design and Respond Surface Method (RSM). The maximum intrinsic viscosity of micro-block CPAM was 13.223 dL g(-1) under the optimum synthesis conditions. The dewatering performance of micro-block CPAM was evaluated taking activated sludge collected from a dyeing mill as the processing object. Results showed that the micro-block CPAM exhibited excellent dewatering performance. At a 30 mg L-1 dosage of micro-block CPAM, the residual turbidity, filter cake moisture content, specific resistance to filtration and chemical oxygen demand removal rate reached 4.47 NTU, 72.2%, 5.47 (10(12) m kg(-1)) and 79.2%, respectively. Dewatering tests not only demonstrated the superiority of micro-block P(AM-MAPTAC) synthesized by UV-initiated template copolymerization over that synthesized by traditional methods but also demonstrated that increasing the molecular weight can further enhance the dewatering performance of flocculants.
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