caa a22 4500 378903314 CHVBK 20180305123523.0 cr unu---uuuuu 161128e20041201xx s 000 0 eng 10.1515/epoly.2004.4.1.636 doi (NATIONALLICENCE)gruyter-10.1515/epoly.2004.4.1.636 Studies on flocculation of clay suspension by polyacrylamide [Elektronische Daten] [T. Niranjana Prabhu, Y. Jagannadha Rao, K. Prashantha] The flocculation of dilute pottery clay suspension using polyacrylamide (PAM) was investigated. Different molecular weight PAMs were synthesized by free-radical polymerization initiated with the persulfate-bisulfate redox pair. The synthesized polyelectrolytes (PAM1, PAM2 and PAM3, from low to high molecular weight) and a commercial one (C-492) were used for flocculation studies. The flocculating performance of polyelectrolytes was measured on 3% w/v pottery clay suspension using settling tests and turbidity measurements. PAM2 at pH 5.0 showed the maximum settling rate, which is nearly three times that of C-492, and it also showed a better turbidity reduction. Molecular weight is the key factor in influencing settling and turbidity reduction. In the present study, increasing molecular weight enhanced settling rate and turbidity reduction to a certain level beyond which there is a decrease, suggesting an optimum molecular weight for the given application. PAM2, a medium molecular weight polyelectrolyte (2.0·105 g/mol) has shown better performance than PAM1 (1.3·105 g/mol), PAM3 (6.0·105 g/mol) and the commercial polyelectrolyte C-492 (molecular weight of order 106). © 2013 by Walter de Gruyter GmbH & Co. Prabhu T. Niranjana Department of Biotechnology, M. V. J. College of Engineering, Bangalore - 560 067, India; Fax +91-80-28452443 aut Rao Y. Jagannadha Department of Biotechnology, M. V. J. College of Engineering, Bangalore - 560 067, India; Fax +91-80-28452443 aut Prashantha K. Polymer Composites Laboratory, Department of Metallurgy, Indian Institute of Science Bangalore - 560 012, India aut e-Polymers De Gruyter 4/1(2004-12-01), 636-642 2197-4586 4:1<636 2004 4 epoly https://doi.org/10.1515/epoly.2004.4.1.636 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/epoly.2004.4.1.636 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Prabhu T. Niranjana Department of Biotechnology, M. V. J. College of Engineering, Bangalore - 560 067, India; Fax +91-80-28452443 aut NATIONALLICENCE 700 1- Rao Y. Jagannadha Department of Biotechnology, M. V. J. College of Engineering, Bangalore - 560 067, India; Fax +91-80-28452443 aut NATIONALLICENCE 700 1- Prashantha K. Polymer Composites Laboratory, Department of Metallurgy, Indian Institute of Science Bangalore - 560 012, India aut NATIONALLICENCE 773 0- e-Polymers De Gruyter 4/1(2004-12-01), 636-642 2197-4586 4:1<636 2004 4 epoly CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter