环境工程学报2011，Vol.5Issue(12)：2733-2738,6.
改性花生壳粉对钙离子的吸附特性研究
Study on adsorption characteristics of calcium ions on modified peanut shell
摘要
Abstract
Modified peanut shell was used to adsorb calcium ions from water to reduce hardness. The kinetic and equilibrium characteristics of adsorption were investigated in the uptake of calcium ions, and fourier transform infra-red （FTIR） analysis was employed to characterize the adsorbent. Results showed that 85% of the uptake by the modified peanut shell occurred in 45 min, and the adsorption equilibrium was obtained within 4 h, which was well described by a pseudo-second-order kinetic model. The equilibrium adsorption was effectively described by Langmuir adsorption isotherm. Furthermore, the adsorption increased when pH increased from 2 to 12, and a significantly high adsorption was caused by strong basicity. In fixed-bed column adsorption, the break- through curve was well fitted by the Thomas model. According to the FTIR analysis, the high content of unsatu- rated structures （ C =C, C =O） and C--O groups in modified peanut shell contributed to the adsorption of calcium ions significantly.关键词
改性花生壳粉/钙离子/吸附动力学/等温吸附/FTIRKey words
modified peanut shell/calcium ions/kinetic model/adsorption isotherm/FTIR分类
资源环境引用本文复制引用
刘光全,张华,吴百春..改性花生壳粉对钙离子的吸附特性研究[J].环境工程学报,2011,5(12):2733-2738,6.基金项目
基金项目：国家水体污染控制与治理科技重大专项 （）
