| 硫酸根离子与聚合铝的反应过程及其产物形态 |
| 摘要点击 1454 全文点击 1575 投稿时间：2002-07-19 修订日期：2002-10-15 |
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| 中文关键词 聚合铝 硫酸根 混凝 形态分析 扫描电镜观察 |
| 英文关键词 PACl sulfate coagulation speciation analysis Scanning Electron Microscopy |
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| 中文摘要 |
| 对不同Al/SO2-4比及碱化度条件下PACl与SO42-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/SO42-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SO42-/Al比率从0.45～0.30逐渐降低.各聚合铝水解形态与SO42-反应速率上存在明显差异,从而为其混凝优势形态的分离纯化创造了条件. |
| 英文摘要 |
| 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=[OH]/[Al]) exhibited significant role in the PACl-sulfate reaction.It indicated different species in various PACl under different reaction pathway with sulfate.The Alc formed precipitation quickly with sulfate,while Alb underwent slowly crystallization.The decrease of Ala 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. |
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