壳聚糖载稀土化合物树脂的制备、表征及其除氟性能的研究  

PREPARATION AND CHARACTERIZATION THE RARE EARTH MODIFIED CHITOSAN RESIN ABSORBENT AND ITS DEFLUORIDATION PERFORMANCE

作　　者：梁鹏[1] 徐莹[1] 张一妹[1] 罗斓[1] 汪东风[1] 

机构地区：[1]中国海洋大学食品科学与工程学院,山东青岛266003

出　　处：《水处理技术》2013年第7期61-64,80,共5页Technology of Water Treatment

基　　金：国家自然基金(31101330);国际合作项目(2010DFA31330);海洋公益性行业科研专项项目(201005020-6)

摘　　要：采用反相悬浮法制备得到1种壳聚糖载稀土化合物除氟剂,探讨了吸附时间、pH、除氟剂用量、F-初始含量以及共存离子对除氟效果的影响。结果表明,反应时间为2 h时,氟吸附量达到1.83 mg/g;随pH(5.0～9.0)增大吸附量呈下降趋势;除氟剂用量(0.5～5.0 g/L)增加吸附率也增加;F-初始质量浓度(1.25～20.0 mg/L)对吸附量影响较大,增加时,吸附量明显增加;体系中CO32-与HCO3-的存在对F-的吸附存在负面影响;利用红外光谱(FTIR)及扫描电镜(SEM)表征证实试验成功制备得到1种新型有效的除氟剂。Defluoridation absorbent was prepared by rare earth compounds modified chitosan via inverse suspension method.Then the effect of various parameters,such as contact time,pH,absorbent dosage,initial fluoride concentration and co-ions,on fluoride adsorption were performed.It was observed that fluoride adsorption capacity was 1.83 mg/g when contact time was 2 h,and the adsorption capacity was decreased significantly with increasing pH from 5.0～9.0.It was found that fluoride absorbent dosage affected the fluoride adsorption rate greatly as the same as the initial fluoride concentration did.Adsorption rate was increased with the increase of defluoridation absorbent dosage from 0.5～5.0 g/L and initial fluoride concentration from 1.25～20 mg/L.Carbonate and hydrogen carbonate ions could reduce fluoride adsorption capacity evidently.Finally,FITR and SEM results confirmed that a novel fluoride absorbent was successfully prepared in this work.

关 键 词：壳聚糖 稀土化合物 除氟剂 表征 

分 类 号：TQ322.9[化学工程—合成树脂塑料工业]