【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%。更多还原

【Abstract】 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.更多还原