化工进展2011，Vol.30Issue(6)：1296-1301,6.
壳聚糖印迹聚合物对Zn2+的吸附动力学
Kinetics of adsorption of Zn2+ on imprinted chitosan polymer
摘要
Abstract
Zn2+ was used as template with paraffin as dispersant agent, formaldehyde as pre-crosslinking agent, and epichlorohydrin as crosslinking agent to prepare a imprinted chitosan polymer. The structure of the polymer was characterized by X ray diffractometer ( XRD ). The dosage of the polymer and the influence of temperature on the adsorption of Zn2+ were studied. Studies on the kinetics of the adsorption of Zn2+ by the imprinted polymer and the isothermal adsorption properties were also performed. The result showed that the regularity of the chitosan crystals was broken in the preparation of the imprinted polymer, adding a large amount of coordination group which enlarged adsorption capacity. Meanwhile the polymer acquired a highly selective adsorption capacity to Zn2+,and the separation factor of Zn2+, Cd2+, Mg2+, Mn2+ were all greater than 1.5. The imprinted polymer adsorbed the Zn2+ rapidly, and the whole adsorption process fitted the pseudo-second-order kinetic model well, t/Qt=8.1744+2.0186t and the correlation coefficient was 0.998. The calculated equilibrium adsorption capacity was satisfactory compared with the experiment data. The adsorption process at a constant temperature fitted the Langmuir equation of isothermal adsorption: Ce/Qe=l.3297+0.02701Ce and the maximum adsorption capacity was 37.023 mmol/g. The adsorption mainly proceeded in the form of monolayer.关键词
壳聚糖/印迹/吸附/Zn2+/动力学Key words
chitosan/ imprinting/ adsorption/ Zn2+/ kinetics分类
化学化工引用本文复制引用
洪英,钟泽辉,郭宾..壳聚糖印迹聚合物对Zn2+的吸附动力学[J].化工进展,2011,30(6):1296-1301,6.基金项目
湖南省教育厅项目(08C293)及湖南省科技厅项目(2010SK3041). （08C293）
