改性纤维素吸附剂的合成及其对铜离子的吸附  

Preparation and characterization of modified cellulose and its application for adsorption of Cu(Ⅱ)

作　　者：王小芬[1] 韦万兴[1] 张晓霞[1] 周敏[1] 刘盛[1] 

机构地区：[1]广西大学化学化工学院,南宁530004

出　　处：《环境工程学报》2015年第4期1553-1558,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(81060261);广西自然科学基金资助项目(2011GXNSFD018016)

摘　　要：建立了一种简单方便的纤维素改性的固相合成方法。采用普遍廉价的滤纸作为原料,用固相合成法将预处理后的滤纸纤维经琥珀酸酐进行酯化改性,制备成新型的纤维素吸附剂,通过质量增比、扫描电镜、傅里叶红外光谱仪和X射线衍射仪对制备的吸附剂进行了分析表征,并且探究了离子初始浓度、溶液p H和吸附时间对改性纤维素吸附铜离子的影响。结果表明,在室温下初始离子浓度为1 000 mg/L,离子溶液体积为50 m L,加入0.1 g纤维改性剂,p H为4.0~5.0,吸附平衡时间为50 min时,滤纸纤维改性后最大吸附铜离子质量可达470 mg/g,铜离子去除率达到94%。A simple and effective preparation of modified cellulose was developed. Celluloses derived from common cheap filter paper reacted with succinic anhydride in solid state to offer esterified celluloses. These esterified celluloses were characterized by mass percent gain,SEM,FTIR,and XRD methods. Effects of various environmental parameters such as ionic concentration,solution p H,and adsorption time on Cu2 +adsorption by the modified materials were investigated. As a result,this material showed a maximum adsorption capacity of 470 mg /g,and for initial concentration of 1 000 mg / L,the Cu2 +removal rate reached 94% at p H = 4. 0 ~ 5. 0 after reaction for 50 min at room temperature,when 0. 1 g fiber modified adsorbent was used.

关 键 词：纤维素 改性 固相合成 铜离子吸附 

分 类 号：X703[环境科学与工程—环境工程] O647.3[理学—物理化学]