基于重金属离子治理的巯基木质纤维素/蒙脱土纳米复合吸附材料的制备

项目名称： 基于重金属离子治理的巯基木质纤维素/蒙脱土纳米复合吸附材料的制备

项目编号： No.21467021

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 化学工业

项目作者： 张晓涛

作者单位： 内蒙古农业大学

项目金额： 50万元

中文摘要： 本文以内蒙古自治区储量丰富的天然可再生资源木质纤维素为原料，通过分子化学改性的手段，将巯基引入木质纤维素分子骨架上，合成巯基木质纤维素，增强螯合作用和木质纤维素的表面活性，从微观角度分析巯基木质纤维素和蒙脱土的三维空间结构，并利用插层复合法制备得巯基木质纤维素/蒙脱土新型纳米复合材料。确定巯基木质纤维素/蒙脱土制备的最佳条件和反应方法，采用XRD、FRIT、SEM、TEM、XPS、HNMR现代分析手段进行结构表征。探索巯基木质纤维素/蒙脱土纳米复合材料对废水中重金属离子的吸附和解吸性能，考察各种因素对纳米复合材料吸附和解吸性能的影响，寻找最佳的吸附和解吸条件。FRIT、SEM、TEM、XPS和DTA-TG对比分析吸附和解吸前后纳米复合材料的外观形貌和各类活性功能基团的变化，探讨吸附剂循环再生条件和吸附机理。研究结果对木质纤维素的深度开发利用和工业废水中重金属离子的污染治理有重要的理论意义。

中文关键词： 巯基木质纤维素/蒙脱土；纳米复合材料；吸附；解吸；重金属离子

英文摘要： With the natural renewable polymer lignocellulose and inorganic clay mineral montmorillonite as raw materials, which are abundant in the Inner Mongolia Autonomous Region, sulfhydryl-lignocellulose will be synthesized by a chemical molecular modification mean of connecting sulfhyl to the structure of lignocellulose, in order to enhance the chelation and the surface activity of lignocellulose in this project. And then from the microscopic point of view, the three-dimensional structure of two kinds of natural macromolecule polymers are analyzed, sulfhydryl-lignocellulose will be intercalated into layered structure of montmorillonite, a new adsorbent sulfhydryl-lignocellulose/montmorillonite nanocomposite will be prepared. the optimal preparation conditions of sulfhydryl-lignocellulose/montmorillonite nanocomposite will be determined by altering each impact factor. The structure will be characterized by XRD, FRIT，SEM, XPS,TEM and HNMR. The static adsorption and desorption properties of sulfhydryl-lignocellulose/montmorillonite nanocomposite for heavy metal ions in industrial wastewater will be investigated by varying each influencing parameter, in order to define the optimal adsorption and desorption conditions. Different changes in appearance and functional groups before and after adsorption will be comparative studied by FRIT, SEM, TEM, XPS and DTA-TG. Treatment of adsorbent recycling and regeneration, along with adsorption mechanism will be discussed in detail. The research results will have important theoretical significant for the utilization of lignocellulose and the pollution control of heavy metal ions in industrial wastewater. Moreover this study will also give a way expected to realize ecological benefits, economic benefits and social benefits harmonized development in our autonomous region .

英文关键词： Sulfhydryl-Lignocellulose/Montmorillonite;Nanocomposite;Adsorption;Desorption;Heavy Metal Ions