预氧化强化铝盐絮凝处理含铁水源水试验研究

Study on Pre-oxidation Enhanced Aluminum Flocculant Treatment of Containing Iron Source Water

近年来水源中铁超标问题引起大家关注,特别是村镇饮水中铁超标情况较为普遍。本文通过预氧化强化絮凝工艺去除Fe^(2+),分别研究了加入次氯酸钠(NaClO)、高锰酸钾(KMnO_(4))和双氧水(H_(2)O_(2))预氧化含铁水源,再投加絮凝剂去除Fe^(2+)的处理效果,进行了单因素和正交实验,研究了不同因素影响下对Fe^(2+)的去除效果及优化工艺的最佳条件。实验结论表明:NaClO作为预氧化剂效果最好,在pH值为8.03,投加1.1 mg/L的NaClO,预氧化9 min后,投加90 mg/L的絮凝剂,Fe^(2+)浓度由1 mg/L降低到0.056 mg/L,去除率为94.4%,结果远优于《生活饮用水卫生标准》(GB 5749—2022),对类似工艺应用具有一定参考。

In recent years,the problem of excessive iron in water sources has been paid more attention,especially the excessive iron in drinking water in villages and towns.In this study,Fe^(2+)was removed by pre-oxidation enhanced flocculation process.The effect of adding NaClO,KMnO_(4) and H_(2)O_(2) to pre-oxidize containing iron sources water,and then adding flocculant to remove Fe^(2+)was studied.It was researched the remov-al effect of Fe^(2+)on different factors and optimize the best conditions of the process by single factor and orthogonal experiments.The experimental re-sults showed that NaClO has the best effect as a pre-oxidant.When the pH value was 8.03,1.1 mg/L NaClO was added,and after pre-oxidation for 9 min,90 mg/L flocculant was added,the concentration of Fe^(2+)was reduced from 1 mg/L to 0.056 mg/L,and the removal rate was 94.4%.The result is far better than the Standards for Drinking Water Quality(GB 5749—2022),which has a certain reference for similar process applications.