Cr^(3+)改性膨润土除酚效果及再生研究  

The Adsorption of 1,4-dihydroxybenzene on Cr^(3+)Modified Bentonite & Its Regeneration

作　　者：王扬[1] 郑红[1] 李海云[1] 吴祖义[1] 梁树平[1] 

机构地区：[1]中国地质大学材料科学与工程学院,北京100083

出　　处：《非金属矿》2005年第4期42-44,47,共4页Non-Metallic Mines

基　　金：中国科学院生态环境研究中心环境水化学国家重点实验室开放基金资助(基金编号:2001010)

摘　　要：Cr^(3+)改性膨润土铬含量明显增加,层间距扩大,实验条件下处理对苯二酚废水,最大去除率可达90%以上。在强酸强碱及吸附不同浓度的对苯二酚条件下,铬离子基本不溶出。在25℃、pH值为8的条件下,吸附平衡浓度达国家工业废水第二类污染物一级排放标准时,改性土的饱和吸附量为88mg/g。铬改性膨润土可通过加热、酸、碱再生。碱再生效果好于酸再生。铬改性土处理每kg酚只需7元,成本远低于活性炭及有机膨润土。The mass curves of Cr^(3+) modified bentonite were obtained when initial concentrations are 3,5,10 and 20mg/L respectively.The equilibrium concentrations of 1,4-dihydroxybenzene met the first criterion of national industrial waster water for the second category contaminants under conditions of 20℃、pH=8.The saturated adsorption amount of Cr^(3+) bentonite is 88mg/g.The second pollution can not take place during the adsorption course.The regeneration of Cr^(3+) modified bentonite can obtained by heating, basic and acid processes.The cost of adsorption of 1,4-dihydroxybenzene is 7 yuan/kg that is far lower than organic bentonite and activated carbon.

关 键 词：改性膨润土 CR^3+ 除酚 对苯二酚 饱和吸附量 有机膨润土 实验条件 排放标准 工业废水 平衡浓度 再生效果 铬含量 层间距 去除率 离子基 pH值 污染物 第二类 酸再生 活性炭 

分 类 号：X783[环境科学与工程—环境工程] TQ424.2[化学工程]