《Preparation and coagulation performance of poly-ferric-aluminum-silicate-sulfate》.pdfVIP

Desalination 268 (2011) 270–275 Contents lists available at ScienceDirect Desalination journal homepage: www.el sevier.c om/l oc ate/ desal Preparation and coagulation performance of poly-ferric-aluminum-silicate-sulfate from fly ash Tong Sun ⁎, Chun-hua Sun, Guo-li Zhu, Xiao-jun Miao, Chao-chao Wu, Shan-bin Lv, Wen-juan Li Faculty of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, PR China a r t i c l e i n f o a b s t r a c t Article history: Poly-ferric-aluminum-silicate-sulfate (PFASS) with various (Al+Fe)/Si molar ratios was prepared from fly ash to Received 9 February 2010 evaluate their coagulation efficiencies in oily wastewater, and the structure and morphology of which were Received in revised form 2 October 2010 characterized by infrared spectra (FTIR), X-ray diffraction (XRD) and transmission electron microscopy (TEM). Accepted 10 October 2010 Therefore, the results indicate that 16:1 (Al+Fe)/Si mole ratio is beneficial to forming of Si–O–Al and Si–O–Fe Available online 20 November 2010 bonds, PFASS consists of NaAl(SO ) ·(H O) and other crystals, the morphology of PFASS is largely influenced by 4 2 2 6 (Al+Fe)/Si molar ratio, and when the (Al+Fe)/Si mole ratio is 14:1 or 12:1, a chain-net structure with three Keywords: Coagulation