%0 Journal Article
%T Analysis of Reaction Process Between Si and Fe in Poly-Silicic-Ferric Sulfate(PSF)coagulant<br>聚硅酸铁(PSF)混凝剂硅铁反应过程研究
%A FU Ying
%A YU Shui-li
%A YANG Yuan-jing
%A LU Yan
%A <br>付英
%A 于水利
%A 杨园晶
%A 芦艳
%J 环境科学
%D 2007
%I 
%X A new inorganic polymer coagulant, poly-silic-ferric sulfate (PSF) with various Si/Fe ratios (PSF0.5, PSF1 and PSF denote Si/Fe molar ratios of 0.5, 1 and 3, respectively), was prepared using water glass, ferrous sulfate and sodium chlorate by co-polymerization, and pH value was measured during the preparation process. The influence of both Si/Fe ratio and reaction time (polymerization time) on the complexation process (bonding mode) between Si and Fe was explored with many analytical methods (such as X-ray diffraction (XRD), ultraviolet/visible absorption (UVA) scanning, transmission electron microscope (TEM), photon correlation spectra (PCS) and infrared spectrum (IR) using PSF samples taken from different reaction time at different Si/Fe ratios. The results show that the characteristics of PSF are largely influenced by both reaction time and Si/Fe ratios. PSF is found to be a complexation compound of Si, Fe and many other ions, instead of a simple mixture of raw materials. The complexation process between Si and Fe may be different from various Si/Fe ratios, namely, the bonding rate, bonding mode and the stability of the bond between Si and Fe are different from various Si/Fe ratios: the polymer based on Si-O-Fe-O-Fe-O-Si bond may be formed at low Si/Fe ratio, in comparison with that based on Si-O-Fe-O-Si-O-Si bond at high Si/Fe ratio; the formation rate of Fe-O-Fe bond is rapid and there may be a mutual acceleration between Fe-O-Fe bond and Si-O-Fe bond, while the formation rate of Si-O-Si is slow and maybe there is a mutual retardation between Si-O-Fe bond and Si-O-Si bond; the stability of Fe-O-Fe bond is weaker than that of Si-O-Fe or Si-O-Si bond.
%K bonding mode
%K coagulant
%K Si
%K Fe
%K complexation process
%K characterization
%K reaction time
%K Si/Fe ratios<br>键合模式
%K 混凝剂
%K Si
%K Fe
%K 络合过程
%K 表征
%K 反应时间
%K Si/Fe比
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=88E77C1B04FB87EB2A14C4D616195FE2&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=38B194292C032A66&sid=1FA4E9C3E6E88FC8&eid=52B9DFFFCC2EB041&journal_id=0250-3301&journal_name=环境科学&referenced_num=2&reference_num=20