Journal of Polymers and the Environment

, Volume 27, Issue 2, pp 275–285 | Cite as

Preparation and Dewatering Property of Two Sludge Conditioners Chitosan/AM/AA and Chitosan/AM/AA/DMDAAC

  • Jie Fan
  • Qiu Chen
  • Jun Li
  • Danfeng Wang
  • Ran Zheng
  • Qiang Gu
  • Yumin ZhangEmail author
Original Paper


Two new chitosan-grafting copolymers (chitosan-g-PAM-AA and C-chitosan-g-PAM-AA) as sludge conditioners (flocculation and aggregation) have been prepared by employing ceric sulfate as a free radical initiator under nitrogen atmosphere in aqueous solution. The optimum condition for synthesizing chitosan-grafting copolymer was determined by orthogonal experiments. The structure, morphology and property of the obtained graft polymers were characterized by FT-IR, XRD, SEM, TGA and contact angle. Further, the municipal activated sludge dewatering performance of the synthesized copolymers was evaluated by the filter cake moisture content. Herein, the effects of pH value and dewatering temperatures of activated sludge, loading dosage or cationic degree of C-chitosan-g-PAM-AA on the filter cake moisture content were investigated. The synthesized amphoteric flocculant C-chitosan-g-PAM-AA showed a highly effective flocculation capability for activated sludge compared with chitosan-g-PAM-AA, chitosan, polyacrylamide (PAM). Also, the lowest filter cake moisture content was up to 61.41%.


Chitosan-grafting copolymer Synthesis Flocculation and aggregation Sludge dewatering Amphoteric flocculant 



The research was supported by Beijing Guoneng Zhongtian Environmental Protection Technology Co. Ltd. of China.


  1. 1.
    Zheng HL et al (2014) Characterization and evaluation of dewatering properties of PADB, a highly efficient cationic flocculant. Ind Eng Chem Res 56:2572–2582CrossRefGoogle Scholar
  2. 2.
    Liu B et al (2018) Rapid and efficient removal of heavy metal and cationic dye by carboxylate rich magnetic chitosan flocculants: role of ionic groups. Carbohydr Polym 181:327–336CrossRefGoogle Scholar
  3. 3.
    Ye Q, Zhang Z, Ge X (2003) Highly efficient flocculant synthesized through the dispersion copolymerization of water-soluble monomers induced by γ-Ray irradiation: synthesis and polymerization kinetics. J Appl Polym Sci 89:2108–2115CrossRefGoogle Scholar
  4. 4.
    Moody GM (2007) Polymeric flocculants. In: Williams PA (ed) Handbook of industrial water soluble polymers. Wiley, OxfordGoogle Scholar
  5. 5.
    Lin QT et al (2015) Synthesis, characterization, and secondary sludge dewatering performance of a novel combined silicon-aluminum-iron-starch flocculant. J Hazard Mater 285:199–206CrossRefGoogle Scholar
  6. 6.
    Kiechel MA, Schauer CL (2013) Non-covalent crosslinkers for electrospun chitosan fibers. Cabohydr Polym 95:123–133CrossRefGoogle Scholar
  7. 7.
    Fast SA, Kokabian B, Gude VG (2014) Chitosan enhanced coagulation of algal turbid waters—comparison between rapid mix and ultrasound coagulation methods. Chem Eng J 244:403–410CrossRefGoogle Scholar
  8. 8.
    Vakili M et al (2014) Application of chitosan and its derivatives as adsorbents for dye removal from water and wastewater: a review. Carbohydr Polym 113:115–130CrossRefGoogle Scholar
  9. 9.
    Agbovi HK et al (2018) Design of amphoteric chitosan flocculants for phosphate and turbidity removal in wastewater. Carbohydr Polym 189:360–370CrossRefGoogle Scholar
  10. 10.
    Jaafari K (2004) Simulation of a fixed bed adsorber packed with protonated cross-linked chitosan gel beads to remove nitrate from contaminated water. Chem Eng J 99:153–160CrossRefGoogle Scholar
  11. 11.
    Wang JP et al (2013) Synthesis, characterization and application of a novel starch-based flocculant with high flocculation and dewatering properties. Water Res 47:2643–2648CrossRefGoogle Scholar
  12. 12.
    Wu H et al (2017) Evaluation of starch-based flocculants for the flocculation of dissolved organic matter from textile dyeing secondary wastewater. Chemosphere 174:200–207CrossRefGoogle Scholar
  13. 13.
    Wang JP et al (2008) A chitosan-based flocculant prepared with gamma-irradiation-induced grafting. Bio Tech 99:3397–3402CrossRefGoogle Scholar
  14. 14.
    Ali SKA, Singh RP (2009) An investigation of the flocculation characteristics of polyacrylamide-grafted chitosan. J Appl Polym Sci 114:2410–2424CrossRefGoogle Scholar
  15. 15.
    Lu YB et al (2011) Preparation of strong cationic chitosan-graft-polyacrylamide flocculants and their flocculating properties. Ind Eng Chem Res 50:7141–7149CrossRefGoogle Scholar
  16. 16.
    Yuan B et al (2010) The flocculating properties of chitosan-graft-polyacrylamide flocculants (I)—effect of the grafting ratio. J Appl Polym Sci 117:1876–1882CrossRefGoogle Scholar
  17. 17.
    Ge HC, Pang W, Luo DK (2006) Graft copolymerization of chitosan with acrylic acid under microwave irradiation and its water absorbency. Carbohydr Polym 66:372–378CrossRefGoogle Scholar
  18. 18.
    Yazdani-Pedram M, Retuert TJ (2000) Hydrogels based on modified chitosan, 1-synthesis and swelling behavior of poly(acrylic acid) grafted chitosan. Macromol Chem Phys 201:923–930CrossRefGoogle Scholar
  19. 19.
    Zhang J et al (2003) Synthesis and characterization of chitosan grafted poly(N,N-dimethyl-N-methacryloxyethyl-N-(3-sulfopropyl) ammonium) initiated by ceric(IV) ion. Eur Polym J 39:847–850CrossRefGoogle Scholar
  20. 20.
    Wang JP et al (2009) Synthesis and characterization of a novel cationic chitosan-based flocculant with a high water-solubility or pulp mill wastewater treatment. Water Res 43:5267–5275CrossRefGoogle Scholar
  21. 21.
    Blanco Á et al (2009) Polymeric branched flocculant effect on the flocculation process of pulp suspensions in the papermaking industry. Ind Eng Chem Res 48:4826–4836CrossRefGoogle Scholar
  22. 22.
    Yang Z et al (2012) Evaluation of the flocculation performance of carboxymethyl chitosan-graft-polyacrylamide, a novel amphoteric chemically bonded composite flocculant. Water Res 46:107–114CrossRefGoogle Scholar
  23. 23.
    Gui Z et al (2009) Synthesis, characterization and flocculation performance of zwitterionic copolymer of acrylamide and 4-vinylpyridine propylsulfobetaine. Eur Polym J 45:1403–1411CrossRefGoogle Scholar
  24. 24.
    Kokufuta E, Takahashi K (1986) Adsorption of poly(diallyldimethylammonium chloride) on colloid silica from water and salt solution. Macromolecules 19:351–354CrossRefGoogle Scholar
  25. 25.
    Du Q et al (2017) Evaluation of the starch-based flocculants on flocculation of hairwork wastewater. Sci Total Environ 601–602:1628–1637CrossRefGoogle Scholar
  26. 26.
    Matilainen A, Vepsäläinen M, Sillanpää M (2010) Natural organic matter removal by coagulation during drinking water treatment: a review. Adv Colloid Interface Sci 2:189–197CrossRefGoogle Scholar
  27. 27.
    Sajomsang W (2008) Synthesis of methylated chitosan containing aromatic moieties: chemoselectivity and effect on molecular weight. Carbohydr Polym 72:740–750CrossRefGoogle Scholar
  28. 28.
    Wang JP (2007) Gamma radiation-induced grafting of a cationic monomer onto chitosan as a flocculant. Chemosphere 66:1752–1757CrossRefGoogle Scholar
  29. 29.
    Qi L et al (2017) The effects of physicochemical properties of sludge on dewaterability under chemical conditioning with amphoteric polymer. J Polym Environ 25:1262–1272CrossRefGoogle Scholar
  30. 30.
    Watanabe Y, Kubo K, Sato S (1999) Application of amphoteric polyelectrolytes for sludge dewatering. Langmuir 15:4157–4164CrossRefGoogle Scholar
  31. 31.
    Patil MK, Nayak PL (2011) Graft copolymerization of vinyl monomers onto chitosan: III: graft copolymerization of acrylamide onto chitosan for antibacterial activity. Int J Plant Sci 2:210–219Google Scholar
  32. 32.
    Luo XY et al (2011) Optimization of synthesis conditions and structural characterization of the two sexes chitosan. Nonferrous Met Sci Eng 2:32–37Google Scholar
  33. 33.
    Liao Y et al (2014) UV-initiated polymerization of hydrophobically associating cationic polyacrylamide modified by a surface-active monomer: a comparative study of synthesis, characterization, and sludge dewatering performance. J Ind Eng Chem Res 53:11193–11203CrossRefGoogle Scholar
  34. 34.
    Tian DT, Xie HQ (2008) Synthesis and flocculation characteristics of konjac glucomannan-g-polyacrylamide. Polym Bull 61:277–285CrossRefGoogle Scholar
  35. 35.
    Peniche C et al (1999) Self-curing membranes of chitosan/PAA IPNs obtained by radical polymerization: preparation, characterization and interpolymer complexation. Biomater 20:1869–1878CrossRefGoogle Scholar
  36. 36.
    Argüelles-Monal W, Peniche-Covas C (1988) Study of the interpolyelectrolyte reaction between chitosan and carboxymethyl cellulose. Macromol Rapid Commun 9:693–697CrossRefGoogle Scholar
  37. 37.
    Wang HF et al (1997) Studies on chitosan and poly(acrylic acid) interpolymer complex. I. preparation, structure, pH-sensitivity, and salt sensitivity of complex-forming poly(acrylic acid): chitosan semi-interpenetrating polymer network. J Appl Polym Sci 65:1445–1450CrossRefGoogle Scholar
  38. 38.
    Li QY, Wang XL, Liu ShP (1996) Infrared spectroscopic qualitative study of carboxylicacid and carboxylate structure. Nat Sci J 12:67–70Google Scholar
  39. 39.
    Zhang H, Peng QJ, Li YM, Zhang R (2005) Modern organic spectroscopy. Chemical Industry Press, BejingGoogle Scholar
  40. 40.
    Li W et al (1993) Chemical modification of biopolymers-mechanism of model graft copolymerization of chitosan. J Biomater Sci Polym 4:557–566CrossRefGoogle Scholar
  41. 41.
    Zhang R et al (2007) Preparation of copolymer of dimethyldiallylammonium chloride and chitosan and its application. Trans China Pulp Pap 22:46–49Google Scholar
  42. 42.
    Dung P et al (1994) Water soluble derivatives obtained by controlled chemical modifications of chitosan. Carbohydr Polym 24:209–214CrossRefGoogle Scholar
  43. 43.
    Wu Y et al (2005) Synthesis and characterization of a novel amphiphilic chitosan–polylactide graft copolymer. Carbohydr Polym 59:165–171CrossRefGoogle Scholar
  44. 44.
    Joshi JM, Shinha VK (2007) Ceric ammonium nitrate induced grafting of polyacrylamide onto carboxymethyl chitosan. Carbohydr Polym 67:427–435CrossRefGoogle Scholar
  45. 45.
    Ali SKA, Singh RP (2009) Microwave enhanced synthesis of chitosan-graft-polyacrylamide. J Appl Polym Sci 114:2410–2424CrossRefGoogle Scholar
  46. 46.
    Sen G et al (2009) A novel polymeric flocculant based on polyacrylamide grafted carboxymethyl starch. Carbohydr Polym 77:822–831CrossRefGoogle Scholar
  47. 47.
    Mun GA et al (2008) Studies on graft copolymerization of 2-hydroxyethyl acrylate onto chitosan. React Funct Polym 68:389–395CrossRefGoogle Scholar
  48. 48.
    Filipović J et al (1997) The thermal degradation of some alkali metal salts of poly(itaconic acid). J Therm Anal 49:335–341CrossRefGoogle Scholar
  49. 49.
    Kalagasidis Krušić M et al (2004) Polyacrylamide and poly(itaconic acid) complexes. Eur Polym J 40:793–798CrossRefGoogle Scholar
  50. 50.
    Van Dyke JD, Kasperski KL (1993) Thermogravimetric study of polyacrylamide with evolved gas analysis. J Polym Sci Part A 31:1807–1823CrossRefGoogle Scholar
  51. 51.
    Tavana H et al (2004) Contact angle measurements with liquids consisting of bulky molecules. J Colloid Interface Sci 279:493–502CrossRefGoogle Scholar
  52. 52.
    Yang Z et al (2013) Flocculation of both anionic and cationic dyes in aqueous solutions by the amphoteric grafting flocculant carboxymethyl chitosan-graft-polyacrylamide. J Hazard Mater 254–255:36–45CrossRefGoogle Scholar
  53. 53.
    Wang D et al (2016) Synthesis, characterization and evaluation of dewatering properties of chitosan-grafting DMDAAC flocculants. Int J Biol Macromol 92:761–768CrossRefGoogle Scholar
  54. 54.
    Bratskaya S et al (2005) Effect of polyelectrolyte structural features on flocculation behavior: cationic polysaccharides vs. synthetic polycations. Macromol Mater Eng 290:778–785CrossRefGoogle Scholar
  55. 55.
    Raynaud M et al (2012) Compression dewatering of municipal activated sludge: effects of salt and pH. Water Res 46:4448–4456CrossRefGoogle Scholar
  56. 56.
    Sarkar AK et al (2013) Amylopectin grafted with poly (acrylic acid): development and application of a high performance flocculant. Carbohydr Polym 95:753–759CrossRefGoogle Scholar
  57. 57.
    Sharma BR, Dhuldhoya NC, Merchant UC (2006) Flocculants—an ecofriendly approach. J Polym Environ 14:195–202CrossRefGoogle Scholar
  58. 58.
    Zhang WX et al (2010) The flocculating properties of chitosan-graft-polyacrylamide flocculants (II)—test in pilot scale. J Appl Polym Sci 117:2016–2024CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Jie Fan
    • 1
  • Qiu Chen
    • 1
  • Jun Li
    • 1
  • Danfeng Wang
    • 1
  • Ran Zheng
    • 1
  • Qiang Gu
    • 1
  • Yumin Zhang
    • 1
    Email author
  1. 1.College of ChemistryJilin UniversityChangchunPeople’s Republic of China

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