Enhancement of methylbenzene adsorption capacity through cetyl trimethyl ammonium bromide-modified activated carbon derived from Astragalus residue

International Conference on Energy Engineering and Environmental Protection 2017

能源学;生态环境科学

Feng, Ningchuan^1 ; Zhang, Yumei^1 ; Fan, Wei^1 ; Zhu, Meilin^1

School of Basic Medical Science, Ningxia Medical University, Yinchuan

750004, China^1

关键词: Adsorption capacities;    Batch techniques;    Cetyl trimethyl ammonium bromides;    Cetyltrimethylammonium bromide;    Isotherm adsorption;    Langmuir models;    Modified activated carbons;    Physicochemical property;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/121/2/022001/pdf
DOI  :  10.1088/1755-1315/121/2/022001

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Activated carbon was prepared from astragalus residue by KOH and then treated with cetyl trimethyl ammonium bromide (CTAB) and used for the removal of methylbenzene from aqueous solution. The samples were characterized by FTIR, XRD, SEM and Boehm titration. The results showed that CTAB changed the physicochemical properties of activated carbon significantly. The isotherm adsorption studies of methylbenzene onto the astragalus residue activated carbon (ASC) and CTAB-modified astragalus residue activated carbon (ASCCTAB) were examined by using batch techniques and agreed well with the Langmuir model. The maximum adsorption capacity of ASC and ASC-CTAB for methylbenzene determined from the Langmuir model was183.56 mg/g and 235.18 mg/g, respectively. The results indicated that using CTAB as a modifier for ASC modification could markedly enhance the methylbenzene removal from water.