作　　者： ; ; ;

机构地区： 南京理工大学化工学院

出　　处： 《环境科学》 2003年第4期73-76,共4页

摘　　要： 对不同Al/SO2 - 4比及碱化度条件下PACl与SO2 - 4的反应过程进行研究 ,分析了体系中总铝浓度及形态分布变化规律 ,测定了各沉淀 /结晶产物的组成 ,并对其形貌进行了扫描电镜观察 .实验结果表明 :碱化度对PACl/SO2 - 4反应体系有较大影响 ,随着碱化度 (B值 )的增加 ,沉淀 /结晶的析出速率加快 ,结果析出物中OH含量逐渐增加 ,而SO2 - 4/Al比率从 0 45～ 0 3 0逐渐降低 .各聚合铝水解形态与SO2 - 4反应速率上存在明显差异 。 The interaction of sulfate with various PACl was investigated by using Ferron assay,chemical analysis and SEM.The experimental results showed that the basicity (B=\/\) exhibited significant role in the PACl\|sulfate reaction.It indicated different species in various PACl under different reaction pathway with sulfate.The Al\-c formed precipitation quickly with sulfate,while Al\-b underwent slowly crystallization.The decrease of Al\-a resulted in the limit of ferron method.The different speciation component in PACls formed different crystal morphology and chemical composition with sulfate.Increase the basicity,the content of sulfate in precipitate decreased from 0 45 to 0 30.

关 键 词： 聚合铝 硫酸根 混凝 形态分析 扫描电镜观察

领　　域： [环境科学与工程]