赤泥用于酸性含锰废水中锰的净化研究  

Purification of Manganese in Manganese-Containing Acidic Wastewater by Red Mud

作　　者：阎丽[1] 陈冬素 YAN Li;CHEN Dongsu(Hunan Research Academy of Environmental Sciences,Changsha 410004,Hunan,China)

机构地区：[1]湖南省环境保护科学研究院,湖南长沙410004

出　　处：《矿冶工程》2024年第4期237-240,共4页Mining and Metallurgical Engineering

摘　　要：采用还原焙烧-磁选预处理赤泥,得到非磁性物;非磁性物经煅烧、盐酸溶出后加入饱和偏铝酸钠聚合剂聚合后过滤、熟化制备聚合氯化铝(PAC)基液;使用该PAC基液,在沉降时间5 h、PAC基液与废水体积比1∶120、搅拌转速140 r/min、pH值8、反应温度30℃、聚丙烯酰胺(PAM)投加量20 mg/L条件下处理含锰酸性废水,处理后液中锰质量浓度由325.3 mg/L降至1.5 mg/L,锰去除率达99.5%,净化后液中锰质量浓度达到国家一级排放标准。Red mud was pre-treated with process of reduction roasting followed by magnetic separation,and the obtained non-magnetic material was calcined and then dissolved in hydrochloric acid.After that,it was filtered after addition of saturated sodium meta-aluminate polymerizing agent,and then matured to prepare polymeric aluminum chloride(PAC)base liquid,which was used in a purification test.With PAC-base liquid and manganese-containing wastewater in a volume ratio of 1∶120,stirring speed of 140 r/min,pH of 8,reaction temperature of 30℃,and addition of polyacrylamide(PAM)at an amount of 20 mg/L,the manganese mass concentration in the wastewater reduced from 325.3 mg/L to 1.5 mg/L after 5 hours of settlement,showing manganese removal rate up to 99.5%.It is shown that the manganese mass concentration in the purified liquid can meet classⅠlimit in the national discharge standard.

关 键 词：废水处理 锰 絮凝沉淀法 含锰酸性废水 赤泥 非磁性物 聚合氯化铝 聚丙烯酰胺 

分 类 号：X703[环境科学与工程—环境工程]