1. Faculty of Urban Construction and Environmental Engineering,Chongqing University,Chongqing 400045,China 2. Key Laboratory of the Three Gorges Reservoir Region’s Econ-Environment,Ministry of Education,Chongqing University,Chongqing 400045,China 3. College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044,China
Abstract：In the present experiment,poly-ferric silicate sulfate flocculants were prepared by using tetraethylorthosilicate and poly-ferric sulfate as row materials. Because tetraethylorthosilicate has the characteristic of hydrolyzing very slowly，the hydrolyzing reaction was controlled easily. The products feature uniform distribution of ferric and silicate and good repeatability so that it is easy to study the ferric species. Ferric and silicon species distribution in PFSS was investigated by Fe-ferron complexation timed spectrophotometry method and infrared spectrum method. The experiment showed that the amount of Fe(a) in poly-ferric silicate sulfate flocculants was the most in the three species,while the amount of Fe(b) and Fe(c) was small. As the aging time increased,the amount of Fe(b) and Fe(a) would decrease while the amount of Fe(c) would increase for a certain time; But these three species in poly-ferric silicate sulfate flocculants would not change after 5 days of aging. The iron and silicon species in poly-ferric silicate sulfate flocculants were different between poly-ferric sulfate and poly-silicon. There was not simplicial compound but complex reaction between poly-ferric sulfate and poly-silicon. And a new type of inorganic polymer flocculants,i.e. poly-ferric silicate sulfate flocculants was prepared.
郑怀礼1,2,黄小红3,何强2,李丹丹3. 以TEOS为硅源的聚硅硫酸铁中铁的形态分布研究[J]. 光谱学与光谱分析, 2008, 28(03): 543-546.
ZHENG Huai-li1,2,HUANG Xiao-hong3,HE Qiang2,LI Dan-dan3. Study of Ferric Species Distribution in Polyferric Silicate Sulfate (PFSS) Prepared from Tetraethylorthosilicate (TEOS). SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(03): 543-546.
