Preparation of Corn Stalk-Walnut Shell Mix-based Activated Carbon and Its Adsorption of Malachite Green  

作　　者：KANG Chunli SHANG Dan YANG Ting ZHU Ling LIU Fang WANG Nan TIAN Tao 

机构地区：[1]Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130012, P. R. China

出　　处：《Chemical Research in Chinese Universities》2018年第6期1014-1019,共6页高等学校化学研究（英文版）

摘　　要：The mix-based activated carbon derived from corn stalk and walnut shell was prepared by chemical activation method using phosphoric acid as the activator. The optimized conditions for preparation were obtained by the orthogonal experiment, the characterizations of the activated carbon were performed by scanning electron microscopy （SEM）, Fourier transform infrared spectroscopy（FTIR）, Boelan＇s titration method and nitrogen adsorption. For the prepared mix-based activated carbon, the highest iodine number, methylene blue number and BET surface area axe 720.5 mg/g, 195.0 mg/g and 1187 m^2/g, respectively, and the pores are mainly mesopores. The mix-based activated carbon shows the higher adsorption capacity for malachite green than the raw materials, the activated carbons prepared only from corn stalk or walnut shell and the commercial activated carbon. The kinetics and thermodynamics of the adsorption can be satisfactorily described by the pseudo-second-order kinetic model and the Langmuir isotherm model, separately.The mix-based activated carbon derived from corn stalk and walnut shell was prepared by chemical activation method using phosphoric acid as the activator. The optimized conditions for preparation were obtained by the orthogonal experiment, the characterizations of the activated carbon were performed by scanning electron microscopy （SEM）, Fourier transform infrared spectroscopy（FTIR）, Boelan＇s titration method and nitrogen adsorption. For the prepared mix-based activated carbon, the highest iodine number, methylene blue number and BET surface area axe 720.5 mg/g, 195.0 mg/g and 1187 m^2/g, respectively, and the pores are mainly mesopores. The mix-based activated carbon shows the higher adsorption capacity for malachite green than the raw materials, the activated carbons prepared only from corn stalk or walnut shell and the commercial activated carbon. The kinetics and thermodynamics of the adsorption can be satisfactorily described by the pseudo-second-order kinetic model and the Langmuir isotherm model, separately.

关 键 词：Mix-based activated carbon Phosphoric acid activation ADSORPTION Malachite green 

分 类 号：S823.3[农业科学—畜牧学] S948[农业科学—畜牧兽医]