摘要
制备并研究了氯化锌造孔甘蔗渣炭(ZBC)对废水中Cr(Ⅵ)的吸附效果,采用 SEM、FTIR、BET对吸附剂进行表征。结果显示,氯化锌造孔甘蔗渣炭出现大量孔隙,比表面积和官能团数量增加。当废水初始pH=2,Cr(Ⅵ)初始浓度为50mg/L,ZBC投加量为4g/L时,在 25℃下以 120r/min转速进行吸附120min,Cr(Ⅵ)去除率99.8%,最大吸附量为20.450mg/g。由吸附热力学及动力学可知,Langmuir等温吸附模型能更好的反映吸附过程,且该过程遵循拟二级动力学方程。
The zinc chloride modified bagasse was prepared,and the adsorption of Cr(Ⅵ) from wastewater by zinc chloride modified bagasse was studied. The adsorbents were characterized by SEM,FTIR and BET. The results showed that the zinc chloride modified bagasse had a large number of pores,and the specific surface area and the number of functional groups increased. When the initial pH of the wastewater was 2,the initial concentration of Cr(Ⅵ) was 50 mg/L,the dosage of zinc chloride pore-forming bagasse carbon was 4 g/L,the adsorption time was 120 min,the rotating speed was 120 r/min and the temperature was 25 ℃,the Cr(Ⅵ) removal rate reached 99. 8% and the maximum adsorption capacity was 20. 450 mg/g. According to adsorption thermodynamics and kinetics,Langmuir isotherm adsorption model can better reflect the adsorption process,and the process follows the pseudo-second-order kinetic equation.
作者
刘雪梅
赵蓓
LIU Xue-mei;ZHAO Bei(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)
出处
《应用化工》
CAS
CSCD
北大核心
2019年第6期1354-1358,1362,共6页
Applied Chemical Industry
基金
江西省科技支撑计划项目(20161BBF60060)
江西省自然科学基金(20151BAB207009)
关键词
氯化锌
造孔
吸附
Cr(Ⅵ)
zinc chloride
pore formation
adsorption
Cr(Ⅵ)
