TEMPO氧化纤维素对Pb^2+的吸附性能研究  

Adsorption property of TEMPO/TOC for Pb^2+

作　　者：曹猛 孙玉娟 刘洪杰[1] 褚晓萌 刘少杰[1] Cao Meng;Sun Yujuan;Liu Hongjie;Chu Xiaomeng;Liu Shaojie(College of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018)

机构地区：[1]河北科技大学化学与制药工程学院,石家庄050018

出　　处：《化工新型材料》2020年第12期200-203,共4页New Chemical Materials

基　　金：河北省高等学校科学技术研究项目(QN2018135)。

摘　　要：通过采用2,2,6,6-四甲基哌啶氮氧自由基(TEMPO)/NaBr/NaClO体系来选择性催化氧化纤维素,并将制得的氧化纤维素(TOC)用于Pb^2+的吸附。结果表明:TOC对Pb^2+溶液吸附的最佳pH为5。不同羧基含量的TOC对于Pb^2+溶液的吸附,随着羧基含量的增大,其吸附量也在增大且在一定范围内符合线性关系。对于Pb^2+的吸附行为更符合Freundlich吸附等温线方程,最大饱和吸附量为138.82mg/g,循环使用性能良好;将TOC通过超声波细胞粉碎机处理纳米化,处理时间为20min时,粒度最小,纤维素吸附量/吸附率最高。The TEMPO/NaBr/NaClO system was used to selectively catalyze the oxidation of cellulose,and the obtained oxidized cellulose(TOC)was used for the adsorption of Pb^2+.The results showed that the optimum pH of TOC adsorption on Pb^2+was 5.The adsorption capacity of TOC on Pb^2+solution increased with the increase of carboxyl content,showing a linear relationship to a certain extent.The adsorption behavior of Pb^2+was more in line with the Freundlich adsorption isotherm equation.The maximum saturated adsorption capacity was 138.82mg/g,and the cycle performance was good.The oxidized cellulose was treated by ultrasonic cell pulverizer for nanomerization.When the treatment time was 20min,the smallest particle size was obtained and the adsorption/adsorption rate of cellulose was the highest.

关 键 词：氧化纤维素 重金属离子 吸附 纳米化 

分 类 号：TQ316.6[化学工程—高聚物工业]