摘要
ＰＳＡＡ是一种含有铝离子的聚硅酸絮凝剂。本文用２７Ａｌ－ＮＭＲ法和Ａｌ－Ｆｅｒｒｏｎ逐时络合比色法研究了ＰＳＡＡ水溶液中铝的形态分布情况，考察了ＳｉＯ２／Ａｌ３＋摩尔比，温度及稀释作用对铝的形态分布的影响。结果表明，ＰＳＡＡ水溶液中的铝主要是以单核羟铝络合物形式存在，聚硅酸的存在对铝的形态分布影响不大，温度对铝的形态分布无影响，稀释作用对铝的形态分布有一定的影响。
Polysilicic acid containing aluminum(PSAA) is a new flocculant.The aluminum speciation of PSAA solution was studied with two methods,involving 27 Al NMR spectroscopy method and Al Ferron timed complex colorimetric method.The effects of SiO 2/Al 3+ molar ratio,temperature and dilution in water on the aluminum speciation of PSAA were also investigated.The experimental results show that the mainly existed species of Al(Ⅲ) in PSAA water solution is monomeric(Al).The temperature has no effect on the speciation of aluminum.The speciation of aluminum of PSAA is affected slighly by SiO 2/Al 3+ molar ratio and dilution in water.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1997年第3期279-282,共4页
China Environmental Science
