Peng Jian-xiong, Xue An, Zhao Hua-zhang, Du Lian-ying
The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China.
Huan Jing Ke Xue. 2008 Sep;29(9):2513-7.
New types of organic silicate aluminum hybrid flocculants were prepared by employing Tetraethylorthosilicat (TEOS), Diethoxydimethylsilane (DEDMS), gamma-Aminopropylmethyldiethoxysilane (APDES) as silicon source. The Al species distribution in these new products was investigated by Al-Ferron complexation timed spectrophotometric method. The results show that silicon source, basicity (B) and Si/Al molar ratio have effect on the Al species distribution. Among them, basicity has greater effect, three sets of products have similar characteristics. The content of Al(a) declines with the rise of B value, while the contents of Al(b) and Al(c) increase. Al(c) is the dominant Al species in the products with TEOS as silicon source. DEDMS has little contribution to the distribution of Al species. In the products with APDES as silicon source, Al(c) is the dominant Al species while the content increases with the rise of Si/Al molar ratio.
以正硅酸乙酯（TEOS）、二乙氧基二甲基硅烷（DEDMS）、γ-氨丙基甲基二乙氧基硅烷（APDES）为硅源制备了新型有机硅酸铝杂化絮凝剂。采用Al-Ferron络合定时分光光度法研究了这些新产品中铝的形态分布。结果表明，硅源、碱化度（B）和硅铝摩尔比对铝的形态分布有影响。其中，碱化度的影响较大，三组产品具有相似的特征。Al(a)的含量随B值的升高而降低，而Al(b)和Al(c)的含量增加。以TEOS为硅源的产品中，Al(c)是主要的铝形态。DEDMS对铝形态分布的贡献较小。以APDES为硅源的产品中，Al(c)是主要的铝形态，其含量随硅铝摩尔比的升高而增加。
