天然锰钾矿处理印染废水实验研究  

Oxidative decolorization of printing and dyeing wastewater by natural cryptomelane

作　　者：杨欣[1] 鲁安怀[2] 李改云[1] 李巧荣[1] 高翔[3] 任子平[4] 

机构地区：[1]中国地质大学,北京100083 [2]北京大学地球与空间科学学院,北京100871 [3]北京城市学院,北京100083 [4]中国科学院生态环境研究中心,北京100085

出　　处：《岩石矿物学杂志》2003年第4期369-373,共5页Acta Petrologica et Mineralogica

基　　金：国家重大基础研究前期研究专项资助项目 ( 2 0 0 1CCA0 2 40 0 ) ;国家自然科学基金资助项目 ( 4 9972 0 17)

摘　　要：利用天然锰钾矿处理印染废水 ,讨论了介质 pH值、样品用量、样品粒径、反应时间、光照和同存电解质等实验条件对活性艳红X_3B印染废水脱色速率的影响。处理了工业中常用的 10种活性染料印染废水和华丰印染厂实际废水 ,大部分染料的脱色率达到了 95 % ,处理后的华丰印染厂的CODCr和色度都达到了纺织染整工业废水排放一级标准 ,且天然锰钾矿可以被重复使用。锰的溶解情况研究结果表明 ,加入染料后 ,溶液中Mn(Ⅱ )的浓度大大提高 ,表明染料能将Mn(Ⅳ )还原为可溶的Mn(Ⅱ ) ,即染料与锰钾矿颗粒物界面发生了氧化还原反应 。Printing and dyeing wastewater (PDW) decolorization by natural cryptomelane was studied in aqueous and acidified suspensions on the basis of the oxidation and deoxidization property of natural cryptomelane. The results show that the reaction rate increases with the decrease of pH and grain size and the increase of mineral quantity and time,and the addition of sodium nitrate is in favor of the decolorization of dyes whereas the phosphate inhibits the reaction. 10 kinds of PDW were treated in the experiment, the decolorization rate of most of dyes can be up to 95%, with the lowest one above 84%. The PDW of Huafeng Plant after treatment reaches level I discharge criterion of industrial wastewater. Based on the experiment on solubility of natural cryptomelane, Mn(Ⅳ) can be deoxidized into Mn(Ⅱ), it is tentatively proposed that the possible reaction scheme is the oxidation_deoxidization reaction.

关 键 词：天然锰钾矿 印染废水 氧化还原反应 脱色 废水处理 

分 类 号：X791.03[环境科学与工程—环境工程] P578.4[天文地球—矿物学]