摘要
以微波辅助法制备了壳聚糖负载膨润土材料。通过红外光谱(FTIR)、X-射线衍射(XRD)及扫描电镜(SEM)对膨润土及插层膨润土进行了表征。结果表明壳聚糖负载在壳聚糖上。对该材料吸附水中Cu2+的性能进行了研究,结果显示在25℃,pH=6的条件下,最大理论吸附量为10.10 mg/g,最大理论吸附量随温度升高而降低。用不同模型对等温线及动力学数据进行了拟合,结果表明准二级动力学方程能更好地拟合实验数据,等温吸附平衡更符合Langmuir模型。
A kind of chitosan loaded bentonite was prepared by microwave-assisted. The bentonite and its mod- ified form were characterize by fourier transform infrared （F-FIR）, X-ray diffraction （XRD） and scanning electron microscope （SEM） measurements. The results showed that the chitosan had been loaded on bentonite. The adsorp- tion performance of the material was studied for the removal of Cu2＋. The research indicated that the highest ad- sorption capacity （qm） adsorption capacity of chitosan loaded bentonite was 10. 10 mg/g at 25℃, and it decreased with increasing temperature. The adsorption isotherm and kinetic data were modeled using several models. The ad- sorption isotherm and kinetic data were modeled using several models. The pseudo-second order kinetic model cor- relate properly correlated the kinetic experimental data. librium data better than the Freundlieh isotherm model.
出处
《科学技术与工程》
北大核心
2013年第13期3676-3680,共5页
Science Technology and Engineering
基金
云南省科技厅项目(2011C1132)
州院共建洱海治理项目(YY2011012)资助
关键词
膨润土
壳聚糖
吸附
CU2+
动力学
吸附等温线
chitosan bentonite adsorption Langmuir isotherm model represented the adsorption equi- Cu2
kinetics adsorption isotherm
