木质纤维素基复合材料对Mn^2+吸附性能的研究  

STUDY ON ADSORPTION PROPERTY OF LIGNOCELLULOSE-BASED NANOCOMPOSITE TOWARDS Mn^2+

作　　者：谭师林 白雪岩 王霞 安宇宏[4] 沈玉林 张晓涛[3] TAN Shilin;BAI Xueyan;WANG Xia;AN Yuhong;SHENG Yulin;ZHANG Xiaotao(College of Science,Hong Kong Baptist University,Hong Kong 999077,China;Deborah Forestry Bureau,Inner Mongolia Autonomous Region,Genhe 022357,China;College of Science,Inner Mongolia Agricultural University,Hohhot 100018,China;College of Material Science and Art Design,Inner Mongolia Agricultural University,Hohhot 100018,China)

机构地区：[1]香港浸会大学理学院,中国香港999077 [2]内蒙古自治区得耳布尔林业局,根河022357 [3]内蒙古农业大学理学院,呼和浩特010018 [4]内蒙古农业大学材料科学与艺术设计学院,呼和浩特010018

出　　处：《内蒙古农业大学学报（自然科学版）》2020年第3期68-74,共7页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：内蒙古自治区科技成果巯基木质纤维素/蒙脱土复合重金属吸附剂及制备与应用专利技术转化项目(CGZH2018136);国家自然科学基金(31760186);内蒙古自治区“草原英才”工程青年创新创业人才(Q2017053);内蒙古大兴安岭林管局木质纤维素基复合材料专利技术转化项目。

摘　　要：通过溶液插层复合法以木质纤维素和蒙脱土为原料,成功的制备了新型木质纤维素基纳米复合吸附材料(LCMT)。研究了LCMT去除水体中Mn^2+时的吸附剂用量、Mn^2+初始浓度、pH值、温度和时间对吸附效果的影响。结果表明,在0.84 g/L的Mn^2+水溶液中,温度为70℃,溶液pH值3.80,时间为40 min,吸附剂LCMT用量为0.1000 g时,LCMT可达到最大吸附量55.23 mg/g。吸附动力学曲线可用准二级动力学速率方程进行拟合,Langmuir等温线可以很好的拟合吸附平衡数据。FTIR和SEM/EDS分析结果表明,LCMT表面富含有大量的活性功能基团,LCMT对Mn^2+的吸附过程主要是单分子层的表面化学吸附。A new lignocellulose-based nanocomposite was successfully fabricated by using intercalation modification reaction with lignocellulose(LC)and montmorillonite(MT)as raw materials.The adsorption properties of Mn^2+ions were optimized,including nanocomposite dosage,the initial concentration of Mn^2+,solution pH,temperature,and time.The results showed that the LCMT has a good potential as a Mn^2+adsorbent,the equilibrium adsorption capacity could reach 55.23 mg/g under the optimal condition,i.e.,0.84 g/L initial concentration of Mn^2+,70℃of temperature,3.80 of the solution pH value,40 min of time and 0.1000 g of LCMT dosage.The adsorption kinetic data was fitted to the pseudo-second order kinetic model well.The Langmuir isotherm model was con-formed to the equilibrium experimental data significantly.By means of FTIR and SEM/EDS characterization analysis,it was revealed that the main adsorption is a monolayer chemical adsorption process between-OH,-C=O,-COO-functional groups of LCMT and Mn^2+.

关 键 词：木质纤维素 纳米复合吸附材料 MN^2+ 吸附 

分 类 号：O636.2[理学—高分子化学]