摘要
采用粉末活性炭作为吸附剂,通过摇瓶法研究了其对Cr(Ⅵ)的吸附去除.考察了NaCl、腐殖酸(HA)和十六烷基三甲基溴化铵(CTAB)对粉末活性炭吸附Cr(Ⅵ)的影响,并用Freundlich和Langmuir等温模型对实验数据进行拟合.结果表明pH值对粉末活性炭吸附Cr(Ⅵ)的影响较大;CTAB和HA能够提高粉末活性炭吸附Cr(Ⅵ)的能力;NaCl的加入降低了粉末活性炭对Cr(Ⅵ)的吸附量,说明Cl-与Cr(Ⅵ)发生了竞争吸附.
The adsorption of Cr（VI）on powdered activated carbon was studied in a shake-flask experiment. The effects of sodium chloride,humic acid and cetyltrimethyl ammonium bromide（CTAB）on Cr（VI）adsorption were investigated and the experimental data were fitted by Freundlich and Langmuir isotherm equations.The results indicated that pH value had a significant effect on Cr（VI）adsorption and the presence of CTAB and humic acid increased the Cr（VI）adsorption capacity on activated carbon.The addition of sodium chloride caused a decrease in Cr（VI）adsorption on the activated carbon,which might result from a competitive adsorption between Cl-and Cr（VI）.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第5期190-193,共4页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(21277111)
关键词
粉末活性炭
Cr(Ⅵ)
吸附
powdered activated carbon
hexavalent chromium
adsorption
