Synthesis and flocculation characteristics of cationic modified corncob: A novel polymeric flocculant
- 1 Center of Food Inspection, Liaoning Entry-Exit Inspection and Quarantine Bureau, Dalian, China
- 2 College of Ocean Environment and Engineering, Shanghai Maritime University, Shanghai, China
- 3 College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
- 4 College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
Abstract
A novel organic polymeric flocculant was synthesized by grafting cationic etherifying monomer (3-chloro-2-hydroxypropyl) trimethyl ammonium chloride (CHPTAC) onto the backbone of corncob powder (CP,F≤ 30mm). The synthetic reaction between CP and CHPTAC was initiated by hydroxyl radical made from Fenton reagent(H 2 O 2 -FeSO 4 ). The alkalization process andsynthetic reaction conditions were optimized byva- rying several parameters affecting grafting efficiency, such as NaOH dose, monomer concentration, reaction temperature and time and distilled water dose. The synthesized cationicflocculant was characterized by elemental analysis,Fourier-transform infrared spectrometer andscanning electron microscope techniques. Itwas concluded that the backbone of CP have been grafted cationic etherifying monomer. The flocculation characteristics in 0.25% (w/v) kaolin suspensions was compared with some of thecommercial flocculants available in markets,and the results demonstrated the synthesized cationic flocculation has superiority as a novel flocculant.
- Bratby, J. (1980) Coagulation and flocculation. Uplands Press, London.
- Gregory, J. (1981) Chemistry and technology of water soluble polymers. Plenum Press, New York.
- Aguilar, M.I., Sáez J., Lloréns, M., Soler, A., Ortuño, J.F., Meseguer, V. and Fuentes, A. (2005) Improvement of coagulation-flocculation process using anionic polyacrylamide as coagulant aid. Chemosphere, 58, 47-56. http://dx.doi.org/10.1016/j.chemosphere.2004.09.008
- Ibrahim, S.S. and Abdel-khalek, N.A. (1992) The action of different types of corn starch on the flocculation of phosphate slimes. Minerals Engineering, 5, 907-916. http://dx.doi.org/10.1016/0892-6875(92)90257-A
- Böhm, N. and Kulicke, W.M. (1997) Optimization of the use of polyelectrolytes for dewatering industrial sludges of various origins. Colloid and Polymer Science, 275, 73-81. http://dx.doi.org/10.1007/s003960050054
- Bolto, B.A. (1995) Soluble polymer in water purification. Progress in Polymer Science, 20, 987-1041. http://dx.doi.org/10.1016/0079-6700(95)00010-D
- Yang, W.Y., Qian, J.W. and Shen, Z.Q. (2004) A novel flocculant of Al(OH) 3 -polyacrylamide ionic hybrid. Journal of Colloid and Interface Science, 273, 400-405. http://dx.doi.org/10.1016/j.jcis.2004.02.002
- Schintu, M., Meloni, P. and Contu, A. (2000) Aluminum fractions in drinking water from reservoirs. Ecotoxicology and Environment Safety, 46, 29-33. http://dx.doi.org/10.1006/eesa.1999.1887
- Rath, S.K. and Singh, R.P. (1998) Grafted amylopectin: applications in flocculation. Colloids Surface A, 139, 129-135. http://dx.doi.org/10.1016/S0927-7757(98)00250-7
- Tripathy, T. and Singh, R.P. (2000) High performance flocculating agent based on partially hydrolysed sodium alginate-g-polyacrylamide. European Polymer Journal, 36, 1471-1476. http://dx.doi.org/10.1016/S0014-3057(99)00201-3
- Mishra, A., Srinivasan, R., Bajpai, M. and Dubey, R. (2004) Use of polyacrylamide-grafted plantago psyllium mucilage as a flocculant for treatment of textile wastewater. Colloid and Polymer Science, 282, 722-727. http://dx.doi.org/10.1007/s00396-003-1003-1
- Burr, R.C., Fanta, G.F., Doane, W.M. and Russel, C.R. (1975) Starch graft copolymers for water treatment. Starch, 27, 155-159. http://dx.doi.org/10.1002/star.19750270504
- Khalil, M.I. and Aly, A.A. (2002) Preparation and evaluation of some anionic starch derivatives as flocculants. Starch-Starke, 54, 132-139. http://dx.doi.org/10.1002/1521-379X(200204)54:3/4 3.0.CO;2-E