title: One-step green synthesis of non-hazardous dicarboxyl cellulose flocculant and its flocculation activity evaluation.
abstract: The waste management of used flocculants is a thorny issue in the field of wastewater treatment. To natural cellulose based flocculants, utilization of hazardous cellulose solvent and simplification of synthetic procedure are the two urgent problems needing to be further improved. In this work, a series of natural dicarboxyl cellulose flocculants (DCCs) were one-step synthesized via Schiff-base route. The cellulose solvent (NaOH/Urea solution) was utilized during the synthesis process. The full-biodegradable flocculants avoid causing secondary pollution to environment. The chemical structure and solution property of the DCC products were characterized by FT-IR, (1)H NMR, (13)C NMR, TGA, FESEM, charge density and ζ-potential. Kaolin suspension and effluent from paper mill were selected to evaluate the flocculation activity of the DCCs. Their flocculation performance was compared with that of commercial cationic polyacrylamide and poly aluminium chloride flocculants. The positive results showed that the NaOH/Urea solvent effectively promoted the dialdehyde cellulose (DAC) conversion to DCC in the one-step synthesis reaction. The DCCs with the carboxylate content more than 1 mmol/g exhibited steady flocculation performance to kaolin suspension in the broad pH range from 4 to 10. Its flocculation capacity to the effluent from paper mill also showed excellent.
authors.affiliation: The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
authors.forename: Hangcheng
authors.initials: H
authors.lastname: Zhu
authors.affiliation: The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Yang
authors.affiliation: The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
authors.forename: Hongyi
authors.initials: H
authors.lastname: Liu
authors.affiliation: Technique Center, Hangzhou Xinhua Group Co., Ltd, Hangzhou 310011, China.
authors.forename: Lan
authors.initials: L
authors.lastname: Shao
authors.affiliation: The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
authors.forename: Xiumei
authors.initials: X
authors.lastname: Zhang
authors.affiliation: The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China. Electronic address: yaoj@zstu.edu.cn.
authors.forename: Juming
authors.initials: J
authors.lastname: Yao
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D002482:Cellulose / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D003998:Dicarboxylic Acids / Q000138:chemical synthesis* / Q000737:chemistry; D005427:Flocculation; D055772:Green Chemistry Technology / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007616:Kaolin / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D018505:Waste Management / Q000379:methods*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D002482:Cellulose; D003998:Dicarboxylic Acids; D007616:Kaolin; D000099166:Polyacrylamides; C058684:2,3-dialdehydocellulose
keywords: Dicarboxyl cellulose; Flocculation activity; Hazardous solvent utilization; Natural flocculant; One-step synthesis