NDLI: Novel cationic polyamidine: Synthesis, characterization, and sludge dewatering performance.

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Novel cationic polyamidine: Synthesis, characterization, and sludge dewatering performance.

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Novel cationic polyamidine: Synthesis, characterization, and sludge dewatering performance.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Guo, Bo Yu, Huan Gao, Baoyu Zhang, Sen Yue, Qinyan Xu, Xing
Description	Author Affiliation: Guo B ( Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China. Electronic address: guobo751119@163.com.); Yu H ( Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.); Gao B ( Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China. Electronic address: bygao@sdu.edu.cn.); Zhang S ( Shandong Institute of Metrology, Jinan 250014, China.); Yue Q ( Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.); Xu X ( Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.)
Abstract	In this study, a new and facile route was employed for synthesis of polyamidine with abundant cations and attractive five-membered ringlike structural unit. N-vinylformamide and acrylonitrile copolymerized firstly to form intermediates, and the intermediates were processed with hydrochloric acid to produce polyamidine. A series of polymerization conditions (e.g. polymerization time, temperature and dosage of initiator) were optimized through productivity, viscosity and cationic degree as evaluation. SEM analysis illustrated that the amidinization process could reduce the size of spaces between molecular and created compact structure, which would contribute to good flocculation performance and high viscosity. FT-IR, XPS and NMR spectra presented a rather clear structure of polyamidine. 34.3% of sludge was sedimentated through the flocculation of polyamidine in the early stages. In contrast, only 6.8% of sludge was sedimentated by polyacrylamide. The moisture content in dehydrated floc could be reduced to 77.7% when 60mg/L polyamidine was added. These results demonstrated that the polyamidine showed a great potential in the practical application of sludge dewatering.
File Format	HTM / HTML
ISSN	10010742
Volume Number	51
Journal	Journal of Environmental Sciences
Language	English
Publisher	Elsevier
Publisher Date	2017-01-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Sewage Chemistry Waste Disposal, Fluid Methods Acrylonitrile Cations Desiccation Flocculation Polymerization Polymers Spectroscopy, Fourier Transform Infrared Viscosity Journal Article
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Medicine Environmental Engineering

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