title: Preparation of solid composite polyferric sulfate and its flocculation behavior for wastewater containing high concentration organic compounds.
abstract: A new kind of inorganic polymer flocculant, the solid composite polyferric sulfate (SPFS) was prepared using ferrous sulfate and Na-Bentonite. The obtained SPFS was characterized by FT-IR spectra, thermogravimetric analysis (TG), scanning electron microscope (SEM) and X-ray Diffraction (XRD). It showed that SPFS was a kind of composite inorganic polymer, which was the complex of PFS and Na-Bent, not only a simple mixture of raw materials. The synthetic mechanism and surface structure of SPFS were also discussed. Acting as a kind of environment-friendly flocculating agent, the solid composite polyferric sulfate (SPFS) was applied in pretreatment of potato starch industry wastewater, a typical wastewater containing high concentration organic compounds, which COD was above 6,000 mg/L. The results showed that the COD removal value reached 4,070 mg/L with COD removal rates being 46.6%. Based on these results, it is suggested that the SPFS can be attractive pretreatment agent for the starch industry wastewater.
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. wangrm@nwnu.edu.cn
authors.forename: R M
authors.initials: RM
authors.lastname: Wang
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: Y F
authors.initials: YF
authors.lastname: He
authors.forename: F Y
authors.initials: FY
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Zhou
authors.forename: N P
authors.initials: NP
authors.lastname: He
mesh_terms: D005290:Ferric Compounds / Q000737:chemistry*; D005427:Flocculation; D007220:Industrial Waste; D033401:Microscopy, Acoustic; D009930:Organic Chemicals / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D005290:Ferric Compounds; D007220:Industrial Waste; D009930:Organic Chemicals