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首页> 外文期刊>Separation and Purification Technology >Copper and zinc sorption by treated oil shale ash
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Copper and zinc sorption by treated oil shale ash

机译：处理过的油页岩灰对铜和锌的吸附

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摘要

Jordanian oil shale ash was used as an adsorbent for the removal of copper and zinc from aqueous solution.This ash was treated with either hydrochloric,nitric,sulfuric or phosphoric acids followed by washing and/or neutralization with sodium hydroxide in order to enhance its adsorption capacity.The sample that was treated with nitric acid showed the highest cation exchange capacity(CEC)of 146 meq/100 g,while the one that was treated with sulfuric acid showed a value of 32 meq/100 g.Different adsorption isotherm data for both copper and zinc were obtained using the nitric acid-treated sample at different pH values.Freundlich and BET models were used to fit the experimental data,which showed that BET best-fitted these data.The separation factor for these isotherms shows unfavorable adsorption type at lower pH value.
机译：约旦油页岩灰被用作吸附剂，用于从水溶液中去除铜和锌。该灰用盐酸，硝酸，硫酸或磷酸处理，然后用氢氧化钠洗涤和/或中和以增强其吸附能力。用硝酸处理的样品显示最高的阳离子交换容量（CEC）为146 meq / 100 g，而用硫酸处理的样品显示的阳离子交换容量（CEC）为32 meq / 100 g。使用硝酸处理的样品在不同pH值下获得铜和锌.Freundlich和BET模型拟合实验数据，表明BET最适合这些数据。这些等温线的分离因子显示了不利的吸附类型在较低的pH值。

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