供水厂预氧化应急除锰技术研究  

Study on Preoxidation Emergency Manganese Removal Technology in Water Supply Plant

作　　者：陈妙兰 胡小芳 李家耀 CHEN Miaolan;HU Xiaofang;LI Jiayao(Dongguan Water Group Water Supply Co.,Ltd.,Dongguan 523112,China)

机构地区：[1]东莞市水务集团供水有限公司,广东东莞523112

出　　处：《供水技术》2025年第1期23-30,共8页Water Technology

摘　　要：通过预氧化作用将水中溶解态Mn^(2+)氧化成悬浮态MnO_(2)·mH_(2)O,再协同后续的混凝沉淀、过滤工艺将其去除,从而达到应急除锰的效果。研究高锰酸钾、次氯酸钠和单过硫酸氢钾复合盐的预氧化除锰性能,通过分析氧化剂的投加量、预氧化时间、水体pH以及高锰酸钾与粉末活性炭联合投加对除锰效果的影响,确定预氧化除锰的工艺参数。结果表明,单独混凝沉淀无法去除Mn2+,但能有效去除原水中的悬浮态锰;高锰酸钾预氧化协同后续工艺能快速有效去除原水中的溶解态锰,且高锰酸钾与粉末活性炭联投能去除过量的高锰酸钾及其异色,并有一定的助凝作用。次氯酸钠预氧化在常规pH条件下除锰效果较差,提高水的pH至8.0,除锰效果有所改善,但仍不能满足除锰需求。单过硫酸氢钾复合盐预氧化无明显除锰效果。The dissolved Mn2+in water was oxidized to suspended MnO_(2)·mH_(2)O by preoxidation,and then removed by subsequent coagulation sedimentation and filtration processes,so as to achieve the effect of emergency manganese removal.The research focused on the preoxidation manganese removal performance of potassium permanganate,sodium hypochlorite,and potassium monopersulfate composite salt.By analyzing the effects of the dosage of oxidants,preoxidation time,pH of water and potassium permanganate combined with powdered activated carbon on the manganese removal,the process parameters for preoxidation manganese removal was determined.The results showed that coagulation sedimentation alone could not remove Mn^(2+),but could effectively remove suspended manganese in raw water.Potassium permanganate preoxidation combined with subsequent processes could quickly and effectively remove dissolved manganese in raw water,and the combination of potassium permanganate and powdered activated carbon could remove excessive potassium permanganate and its unusual color,and had a certain coagulation effect.The effect of sodium hypochlorite on manganese removal was poor under conventional pH conditions.However,when the pH of the water was increased to 8.0,the removal effect of dissolved manganese was improved,but it still could not meet the needs of manganese removal.Potassium monopersulfate composite salt had no obvious effect on manganese removal.

关 键 词：预氧化 除锰 混凝沉淀 粉末活性炭 

分 类 号：TU991[建筑科学—市政工程]