| 酸浸粉煤灰制备复合混凝剂及其处理生活污水的效果研究 |
| 摘要点击 2929 全文点击 1798 投稿时间：2006-12-04 修订日期：2007-03-21 |
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| 中文关键词 粉煤灰 铁铝溶出率 混凝剂 生活污水 |
| 英文关键词 fly ash conversion efficiencies of iron and aluminum coagulant domestic wastewater |
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| 中文摘要 |
| 研究了以粉煤灰和H２ＳＯ4为原料，常温常压下搅拌反应制备复合混凝剂的方法，考查了酸种类、酸浓度、酸灰比、搅拌时间等因素对Fe３＋、Al３＋溶出效果和生活污水混凝效果的影响.结果表明，酸灰比5 mL/g、浓度2 mol/Ｌ的H２ＳＯ4溶液与粉煤灰搅拌4 h并静置30 min后制得的混凝剂，其中Fe３＋的浓度为0 .010 8 mol/Ｌ，溶出率为11 .4%；Al３＋的浓度为0 .035 4 mol/Ｌ，溶出率为4 .3%；对生活污水的COD去除率70 .4%，SS去除率91 .9%，与市售聚合混凝剂效果相当，是一种有开发利用价值的水处理剂. |
| 英文摘要 |
| Fly ash was investigated as a raw material for the preparation of a composite coagulant with sulfuric acid. Types of acid solution, H２ＳＯ4 concentration, ratio of H２ＳＯ4 to fly ash and stirring time were respectively examined as factors that influenced the efficiency of converting the iron and aluminum components into a composite coagulant and coagulation performance on domestic wastewater. The coagulant was attained at the condition of H２ＳＯ4-fly ash ratio of 5 mL/g, H２ＳＯ4 of 2 mol/Ｌ, stirring time of 4h and stabling time of 30 min, and contained Fe３＋ of 0 .010 8 mol/Ｌ with conversion efficiency of 11 .4% and Al３＋ of 0 .035 4 mol/Ｌ with conversion efficiency of 4 .3%. Removal efficiencies of COD and SS by this type of coagulant reached 70 .4% and 91 .9% respectively when treating domestic wastewater. This study provides a promising means to utilize fly ash for coagulation, which possibly makes wastewater treatment more economical and more sustainable. |
