| 以TEOS为硅源的聚硅氯化铝絮凝剂的制备及其物化特征 |
| 摘要点击 1182 全文点击 1368 投稿时间：2003-04-10 修订日期：2003-07-08 |
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| 中文关键词 聚硅氯化铝(PASC) 正硅酸乙酯(TEOS) 形态表征 Al13形态稳定性 |
| 英文关键词 polyaluminum silicate chloride (PASC) tetraethylorthosilicate (TEOS) species characterization stability of Al13 species |
| 作者 | 单位 | | 赵华章1, | 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085 | | 王红宇1,2, | 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085 | | 左华1, | 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085 | | 栾兆坤1, | 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085 | | 裴元生1 | 中国科学院生态环境研究中心环境水质学国家重点实验室,北京,100085 |
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| 中文摘要 |
| 采用TEOS为硅源合成制备了新型的聚硅氯化铝PASC(A),并与传统方法合成的聚硅氯化铝PASC(B) 做了比较,探讨了产品的pH值和Zeta电位随B值和Si/Al摩尔比的变化关系,并利用酸解反应和27Al NMR研究了硅引入对PASC分子结构和铝形态的影响.结果表明,由于采用了特殊的合成方法,与PASC(B)相比,PASC(A)具有更高的聚合度,分子量分布并且分子中铝硅分布均匀,不易被酸解聚,而且有利于Al13形态稳定性. |
| 英文摘要 |
| A new type of polyaluminum silicate chloride [PASC(A)] was prepared by employing tetraethylorthosilicate (TEOS) as silicon source. By comparing PASC(A) with the conventional product [PASC(B)], the effects of B value and Si/Al molar ratio on the pH value and the Zeta potential of PASC(A) were investigated. The influence of the incorporation of silicon into PASC on the molecular structure and aluminium species was also studied by acidification method and 27Al NMR spectroscopy. The results show that the PASC(A) has higher polymerization degree, narrow distribution of molecular weight and symmetrical distribution of aluminium and silicon in PASC molecule. It is more difficult to be acidified, and moreover, it can reduce the loss of Al13 species. All the above advantages of PASC(A) are due to its special synthesis method. |
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