锰改性聚硅硫酸铝铁絮凝剂PSAFMnS的制备及性能研究

Synthesis and Performances of PSAFMnS Flocculant

郭明红李秀妹叶天旭张予辉张丽华

GUO Ming-Hong LI Xiu-Mei YE Tian-Xu ZHANG Yu-Hui ZHANG Li-Hua

采用复合法将锰元素引入聚硅硫酸铝铁对其进行改性制得一种新型絮凝荆PSAFMnS，考察了制备过程中各种因素对产品性能的影响，并采用扫描电镜SEM对其结构进行了表征。PSAFMnS絮凝剂的最佳合成条件为：①稳定硅溶胶中硅含量（以si02的质量分数计）≈2％，pH值≈5．0；②Si、Al、Fe、Mn摩尔比≈6：8：4：3，反应体系的pH值≈1．5，反应温度≈25℃，反应时间选取30min为宜。对高岭土自配水样，加药量为5mg／L时浊度去除率高达75％；对于油田污水，PSAFMnS整体絮凝性能明显优于工业聚合铝，且在PSAFS的基础上浊度除去率提高17．96％。图8表3参6

In this article,a new type PSAFMnS flocculant was synthesized by using Mn to modify PSAFS flocculant through compositing method.The effects of various factors on the performance of PSAFMnS flocculant during the preparation were tested and the structure of PSAFMnS flocculant was indicated by SEM.The optimized synthesis conditions of PSAFMnS flocculant was obtained as follows: ① the Si content,in term of the SiO2 content,≈ 2% and pH ≈ 5.0 for steady silica sol;② the molar ratio of Si,Al,Fe and Mn≈ 6∶ 8∶ 4∶ 3,pH ≈ 1.5,the temperature ≈ 25℃ and the reaction time ≈ 30 min.When the dosge of the PSAFMnS was 5 mg/L,the turbidity removal ratio of kaolin solution achieved 75%.The turbidity and oil removal abilities of PSAFMnS flocculants were obviously better than that of PSAFS flocculants,the turbidity removal ratio enhanced 17.96% based on 57.93% of PSAFS.