论文部分内容阅读
在离子质量浓度25~500 mg.L-1和吸附剂(蛭石)质量浓度10~150 g.L-1范围内分析测试了平衡固液体系中Zn、Cd离子等温吸附量.试验数据表明:平衡离子吸附密度qe(离子吸附量与吸附剂量的比值)唯一由C0/W0(起始点液相离子浓度C0与吸附剂浓度W0的比值)与Ce/W0(平衡液相离子浓度Ce与W0的比值)的差屿来决定,与离子、吸附剂的浓度及吸附反应过程无关.重复测试证实:给定C0/W0时,qe与Ce/W0具有唯一对应的值.指出液/固相离子吸附体系中的强度因子不是离子的浓度而是离子量与吸附剂量的比值,离子吸附反应的方向与速率取决于系统中离子量与吸附剂量的相对水平,离子吸附反应达到平衡的条件是离子与吸附剂化学势之和在液、固相之间的差异为0.
The isothermal adsorption capacity of Zn and Cd ions in the equilibrium solid-liquid system was analyzed and tested in the range of ion concentration 25 ~ 500 mg.L-1 and adsorbent (vermiculite) mass concentration 10 ~ 150 gL-1. The experimental data showed that the equilibrium The ion adsorption density qe (the ratio of the amount of ion adsorption to the amount of adsorbent) is uniquely determined by the ratio of C0 / W0 (ratio of initial liquid phase ion concentration C0 to adsorbent concentration W0) to Ce / W0 (equilibrium liquid phase ion concentration Ce to W0 ) Of the difference between the island to determine, with the ion concentration of adsorbent and adsorption reaction process has nothing to do.Repeat test confirmed: given C0 / W0, qe and Ce / W0 has a unique value corresponding to the liquid / solid phase ion adsorption system In the intensity factor is not the concentration of ions but the ratio of the amount of ions and the amount of adsorbent, the direction and rate of ion adsorption reaction depends on the amount of ions in the system and the relative amount of adsorbent, the ion adsorption reaction to balance the conditions of ions and adsorbents The sum of the chemical potentials is zero between the liquid and solid phases.