Adsorption of Basic Dyes Using Walnut Shell-based Biochar Produced by Hydrothermal Carbonization

作     者：KANG Chunli ZHU Ling WANG Yixue WANG Yuhan XIAO Kunkun TIAN Tao 

作者机构：Key Laboratory of Groundwater Resources and Environment(Jilin University) Ministry of Education Jilin University Changchun 130012 P. R. China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2018年第34卷第4期

页      面：622-627页

核心收录：

学科分类：0821[工学-纺织科学与工程] 0832[工学-食品科学与工程（可授工学、农学学位）] 08[工学] 083201[工学-食品科学] 082103[工学-纺织化学与染整工程] 

基　　金：Supported by the Scientific and Technological Project of Jilin Province  China 

主　　题：Biochar Adsorption Walnut shell Hydrothemal carbonization Basic dye 

摘      要：Hydrothermal carbon（HC） was prepared from walnut shells, which are abundant in Northeastern China. The prepared HC was used as a precursor to produce mtric acid modified carbon（MC）. The hydrothermal carbonization included dehydration and decarboxylation processes wherein the hemicellulose was completely decomposed and the celhilose was partly decomposed, with some oxygen-containing functional groups being produced. The aromati- city, specific surface area and pore content of the HC increased, but its polarity decreased. With 6 mol/L nitric acid and a modification time of 15 min, the specific surface area and pore content decreased, but the proportion of oxy- gen-containing fimctional groups on the surface increased significantly, thereby improving the dye adsorption performance. The adsorption of methylene blue and malachite green was best desclibed by the pseudo-second-order kinetic and Langmuir isotherm models. The adsorption capacity of MC was determined to be much larger than that of HC.