Adsorption of hexavalent chromium on modified corn stalk using different cross-linking agents

1st International Conference on Frontiers of Materials Synthesis and Processing

材料科学;化学

Chen, Suhong^1 ; Zhu, Yi^2 ; Han, Zhijun^3 ; Feng, Gao^4 ; Jia, Yuling^5 ; Fu, Kaifang^6 ; Yue, Qinyan^6

State Grid Shandong Electric Power Research Institute, Jinan

250003, China^1

EconomicandTechnology Research Institute, State Grid Shandong Electric Power Company, Jinan

250001, China^2

State Grid Shandong Electric Power Company, Jinan

250001, China^3

State Grid Jinan Licheng Power Supply Company, Jinan

250100, China^4

Weifang Vocational College, Weifang

261100, China^5

Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan

250100, China^6

关键词: Adsorption capacities;    Cross linking agents;    Endothermic process;    Hexavalent chromium;    Modification effect;    N ,N-Dimethylformamide;    Surface functional groups;    Thermodynamic studies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/274/1/012017/pdf
DOI  :  10.1088/1757-899X/274/1/012017

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this study, four different types of adsorbents modified from corn stalk were synthesized after the reaction with epichlorohydrin, N,N-dimethylformamide, triethylamine and different cross-linking agents. The surface functional groups and thermal stability of modified corn stalk (MCSs) were characterized using FTIR and TG analysis, respectively. The feasibility of using MCSs to remove Cr(VI) were evaluated. Adsorption isotherms were determined and modeled with Langmuir, Freundlich and Temkin equations. The experimental results showed that MCS modified using diethylenetriamine (DETA) had the best modification effect, and the adsorption capacity of Cr(VI) reached as high as 227.27 mg/g at 323 K. Thermodynamic study showed that the Cr(VI) adsorption onto MCSs was endothermic processes. As a result, MCS by using DETA as cross-linking agent has good potential for the removal of Cr(VI) from aqueous solutions.