石灰石矿粉处理含金属离子酸性废水的协同效应  

Synergistic effect of treating acidic waste water containing metal ions by lime stone powder

作　　者：申明乐[1] 张富刚 张刚 

机构地区：[1]南阳理工学院生物与化学工程学院,河南南阳473044 [2]乐凯华光印刷科技有限公司

出　　处：《无机盐工业》2013年第4期51-53,共3页Inorganic Chemicals Industry

摘　　要：利用石灰石矿粉处理含金属离子的酸性废水时,需要两个前提:石灰石与酸作用时pH上升应能达到金属离子水解要求的最低pH;反应终了的pH应高于金属离子完全水解形成难溶氢氧化物要求的pH。利用石灰石矿粉与酸作用导致溶液pH上升时促进金属离子水解的协同效应,达到中和与沉淀金属离子的目的。实验表明,利用石灰石矿粉处理高浓度的含Fe3+或Al3+的酸性废水是有效的,同时实现了大幅度降低成本的目的。There axe two prerequisites while treating acidic water containing metal ions with limestone powder： 1 ）The pH can achieve the lowest hydrolysis pH of metal ions when limestone powder react with acid;2）The pH should be higher than that of the metal ions completely hydrolyzed to form insoluble hydroxides at the end of reaction.Using the synergistic effect of the pH rise originating from limestone powder reacting with acid promoting the hydrolysis of metal ions ,the purpose of neutral- ization and precipitation of metal ions were achieved.Experimental results showed that the treating acidic waste water con- taining metal ions by limestone powder was feasible and could reduce the cost substantially.

关 键 词：石灰石矿粉 含铝废水 含铁废水 协同效应 

分 类 号：TQ132.32[化学工程—无机化工]