铝盐混凝去除氟离子的作用机理探讨  

The removal mechanisms of fluoride ion by aluminum salt coagulant

作　　者：卢建杭[1] 刘维屏[1] 郑巍[1] 

机构地区：[1]浙江大学环境科学研究所(玉泉校区),杭州310027

出　　处：《环境科学学报》2000年第6期709-713,共5页Acta Scientiae Circumstantiae

摘　　要：在烧杯搅拌实验的基础上 ,通过絮体的 ζ电位测定、X射线粉晶衍射、红外光谱、X射线光电子能谱等实验手段考察了铝盐混凝除氟的作用机理 .结果表明 ,铝盐混凝除氟的主要作用机理有吸附、离子交换、络合沉降等 .对于两种形态的铝盐 ,从除氟过程和机理上看 ,单体铝盐中的Al(H2 O) 63 +形态要比聚合铝中的聚羟铝阳离子形态更有利 ,因而总体除氟效果比聚合铝要好 .On the basis of the results of jar tests, the coagulation defluoridation mechanisms of aluminum salts were investigated by means of ζ potential measurement of floc and IR,XRD,XPS analysis of floc structure.The experiment results suggested that the defluoridation process of aluminum salt coagulant includes adsorption,ion exchange and complex precipitation,etc.Compared to the polycations in polyaluminum solution,the monomeric Al(H\-2O) 6 3+ in monoaluminum salt solution is a more better form for fluoride removal.

关 键 词：铝盐混凝剂 混凝 除氟 废水处理 

分 类 号：X703.1[环境科学与工程—环境工程]