改性海泡石作为循环使用的吸附剂在酸性溶液中吸附Pd（Ⅱ）的应用（英文）
发布时间：2021-11-23 13:35
研究以改性海泡石作为吸附剂从酸性溶液中回收Pd（Ⅱ）的吸附特性和机理;通过等温模型、动力学和热力学模型分析改性海泡石对Pd（Ⅱ）的吸附特性;利用SEM-EDS、TEM和XPS技术研究改性海泡石对Pd（Ⅱ）的吸附机理。Langmuir模型表明,当温度为30°C时,改性海泡石对Pd（Ⅱ）的最大吸附量为322.58 mg/g。动力学实验结果表明,准二级动力学模型能较好地模拟改性海泡石对Pd（Ⅱ）的吸附过程,化学吸附为改性海泡石吸附Pd（Ⅱ）的控速步骤。当Pd（Ⅱ）的初始浓度为100 mg/L时,1 g/L改性海泡石可吸附99%的Pd（Ⅱ）。吸附-脱附循环实验结果表明,改性海泡石具有良好的稳定性和重复使用性。本研究结果表明,改性海泡石是一种可高效且经济的Pd（Ⅱ）回收材料。
【文章来源】：Transactions of Nonferrous Metals Society of China. 2020,30(05)EISCICSCD
【文章页数】：12 页
【文章目录】：
1 Introduction
2 Experimental
2.1 Materials
2.2 Batch adsorption experiments
2.3 Desorption and reusability
2.4 Analytical methods
3 Results and discussion
3.1 Characterization of adsorbent
3.2 Effect of pH on adsorption of Pd(II)by modified sepiolite
3.3 Adsorption behavior of modified Pd(II)and sepiolite
3.3.1 Adsorption isotherms
3.3.2 Adsorption kinetics and thermodynamics
3.4 Desorption and reusability
3.5 Adsorption mechanism for Pd(II)by modified sepiolite
3.5.1 SEM-EDS images and EDS spectra
3.5.2 TEM images
3.5.3 XPS spertra
4 Conclusions
本文编号：3513988
【文章来源】：Transactions of Nonferrous Metals Society of China. 2020,30(05)EISCICSCD
【文章页数】：12 页
【文章目录】：
1 Introduction
2 Experimental
2.1 Materials
2.2 Batch adsorption experiments
2.3 Desorption and reusability
2.4 Analytical methods
3 Results and discussion
3.1 Characterization of adsorbent
3.2 Effect of pH on adsorption of Pd(II)by modified sepiolite
3.3 Adsorption behavior of modified Pd(II)and sepiolite
3.3.1 Adsorption isotherms
3.3.2 Adsorption kinetics and thermodynamics
3.4 Desorption and reusability
3.5 Adsorption mechanism for Pd(II)by modified sepiolite
3.5.1 SEM-EDS images and EDS spectra
3.5.2 TEM images
3.5.3 XPS spertra
4 Conclusions
本文编号：3513988
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