11
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Synthesis, characterization, and secondary sludge dewatering performance of a novel combined silicon-aluminum-iron-starch flocculant.

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Flocculation is one of the most widely used cost-effective pretreatment method for sludge dewatering, and a novel environmentally friendly and efficient flocculant is highly desired in the sludge dewatering field. In this study, a novel combined silicon-aluminum-ferric-starch was synthesized by grafting silicon, aluminum, and iron onto a starch backbone. The synthesized starch flocculant was characterized using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy, X-ray powder diffraction, and thermogravimetric analysis. The dewatering performance of secondary sludge was evaluated according to the capillary suction time, settling volume percentage, and specific resistance to filtration. The results indicated that the copolymer exhibited: (1) a good dewatering efficiency over a wide pH range of 3.0-11.0, (2) superior sludge dewatering performance compared to those of polyaluminum chloride (PACl), polyacrylamide (PAM), ferric chloride, and (3) a discontinuous surface with many channels or voids that helps to mobilize the impermeable thin layer of secondary sludge during filter pressing. Such a novel copolymer is a promising green flocculant for secondary sludge dewatering applications.

          Related collections

          Author and article information

          Journal
          J. Hazard. Mater.
          Journal of hazardous materials
          Elsevier BV
          1873-3336
          0304-3894
          Mar 21 2015
          : 285
          Affiliations
          [1 ] School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China. Electronic address: qintlin@163.com.
          [2 ] School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
          Article
          S0304-3894(14)00987-X
          10.1016/j.jhazmat.2014.12.005
          25497034
          5966294c-059b-4776-8aa2-4ec895d39302
          History

          Starch,Flocculant,Grafting synthesis,Sludge dewatering
          Starch, Flocculant, Grafting synthesis, Sludge dewatering

          Comments

          Comment on this article