纤维素基磁性聚偕氨肟树脂吸附Mn(Ⅶ)  

THE ADSORPTION OF CELLULOSE-BASED MAGNETIC ADSORBENT CONTAINING AMIDOXIME GROUPS FOR POTASSIUM PERMANGANATE

作　　者：杨超雄[1] 吴锦远[1] 林力克[1] 

机构地区：[1]中国科学院广州化学研究所,广州510650

出　　处：《离子交换与吸附》1997年第4期359-366,共8页Ion Exchange and Adsorption

基　　金：国家自然科学基金;中国科学院纤维素化学开放研究实验室基金

摘　　要：用酸处理的纤维素基磁性聚偕氨肟树脂（AMAO）在溶液中吸附KMnO4，发生氧化还原反应的几率在2％以下；用碱处理的树脂（BMAO）作吸附剂，KMnO4还原为Mn（OH）4的比例剧增，达到或超过10％，并且与溶液的pH有关。但是，Mn（Ⅶ）被还原为Mn（Ⅳ）的量基本上不受KMnO4起始浓度、吸附剂添加量和吸附时间变化的影响。BMAO树脂吸附KMnO4的量是树脂偕氨肟基含量的5倍以上。超当量吸附现象反映了物理吸附的本质。In aqueous solution, the cellulose-based magnetic polyamidoxime adsolbent treated with hydrochloric acid (AMAO) was used for KMnO4 uptake. The probability of redox reaction was found to be very little. However, the alkali-treated adsor-bent (BMAO) reduces the Mn(Ⅶ) to Mn(Ⅳ) and the conversions ale mostly over 10%. The yidds of Mn(Ⅱ) or Mn(Ⅳ) are independent of the adsorption time.the initial concentration of potassium permanganate solution and the amount of the adsorbents used.The adsorption capacity of KMnO4 by BMAO is about 5-fold to the amount of the amidoxime groups in the adsorbent. The phenomenon of superequivalent adsorption is a reflection of physical adsorption.

关 键 词：纤维素基树脂 磁性吸附剂 聚偕氨肟 高锰酸钾 

分 类 号：O647.33[理学—物理化学] O614.113[理学—化学]