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首页> 外文会议>Proceedings of the 3rd Pan American materials congress >A Comparison Between Recycled Spent Zeolite and Calcite Limestone for Manganese Removal
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A Comparison Between Recycled Spent Zeolite and Calcite Limestone for Manganese Removal

机译：再生废沸石和方解石石灰石脱锰的比较

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The current work initially investigated the manganese removal by sorption in a recycled spent zeolite (faujasite) used in the oil industry. Equilibrium adsorption was described by the Langmuir isotherm (r~2 > 0.99) with a maximum loading of 10.9 mg/g-zeolite. The performance of the spent zeolite was compared with that of limestone (a low cost sorbent). In this latter case, equilibrium sorption was also modelled using the Langmuir isotherms with 1.03 mg/g-limestone as maximum uptake. Fixed-bed sorption on both materials was also studied and solid loadings increased with the aqueous metal concentration. The Thomas model was selected to describe the breakthrough curves and showed good correlation with the experimental data for both samples and indicated a maximum solid uptake of 0.33 mg/g-solid in faujasite and 0.03 mg/g in limestone.
机译：目前的工作最初是通过在石油工业中使用的再生废沸石（八面沸石）中吸附进行脱锰研究。 Langmuir等温线描述了平衡吸附（r〜2> 0.99），最大负载量为10.9 mg / g沸石。将废沸石的性能与石灰石（一种低成本的吸附剂）进行了比较。在后一种情况下，还使用Langmuir等温线模拟了平衡吸附，最大吸收量为1.03 mg / g石灰石。还研究了两种材料在固定床上的吸附，并且固体负载量随金属水溶液浓度的增加而增加。选择托马斯模型来描述穿透曲线，并且与两个样品的实验数据都显示出良好的相关性，并且表明八面沸石中的最大固体吸收量为0.33 mg / g固体，石灰石中的最大固体吸收量为0.03 mg / g。

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