| 载硫脲树脂对Pd2+的吸附与脱附性能 |
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| 引用本文： | 谢祖芳,陈渊,晏全,童张法,莫朗,钟梦婷. 载硫脲树脂对Pd2+的吸附与脱附性能[J]. 化学工程, 2010, 38(9) |
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| 作者姓名： | 谢祖芳 陈渊 晏全 童张法 莫朗 钟梦婷 |
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| 作者单位： | 玉林师范学院,化学与生物学系,广西,玉林,537000;广西大学,化学化工学院,广西,南宁,530004 |
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| 基金项目： | 广西自然科学基金资助项目，玉林师院高层次人才科研基金 |
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| 摘 要： | 研究了717载硫脲树脂对Pd2+的吸附热力学、动力学及脱附特性,考察了吸附时间、pH值、温度等因素对树脂吸附Pd2+的影响。结果表明:在pH=1—5时,吸附能力最好;等温吸附服从Freundlich经验式,在303—313 K条件下,Pd2+吸附量(质量比)为60—80 mg/g的吸附焓变为-29.24—-23.98 kJ/mol,自由能变为-8.00—-7.65 kJ/mol,吸附熵变为-70.10—-52.17 J/(K.mol)。吸附动力学符合Lagergren一级速率方程,303 K时吸附速率常数为0.022 min-1,颗粒内扩散是速率控制步骤之一,膜扩散也共同影响着吸附过程。303 K下树脂静态累积饱和吸附量为144.2 mg/g。用质量分数8%硫脲-1 mol/L HCl混合液可以将树脂上的Pd2+完全解吸。
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| 关 键 词： | 载硫脲树脂 Pd2+ 吸附 脱附 |
Adsorption and desorption properties of Pd2+ on carried thiourea resin |
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| XIE Zu-fang,CHEN Yuan,YAN Quan,TONG Zhang-fa,MO Lang,ZHONG Meng-ting. Adsorption and desorption properties of Pd2+ on carried thiourea resin[J]. Chemical Engineering, 2010, 38(9) |
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| Authors: | XIE Zu-fang CHEN Yuan YAN Quan TONG Zhang-fa MO Lang ZHONG Meng-ting |
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| Affiliation: | XIE Zu-fang1,CHEN Yuan1,YAN Quan1,TONG Zhang-fa2,MO Lang1,ZHONG Meng-ting1(1.Department of Chemistry and Biology,Yulin Normal University,Yulin 537000,Guangxi,China,2.School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China) |
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| Abstract: | The adsorption thermodynamics,kinetics and desorption properties of Pd2+ on the 717 carried thiourea resin were studied.The influences of various factors such as adsorption time,pH value and temperature on the adsorption of Pd2+ were discussed.The experimental results show that the maximum adsorption ability of the carried thiourea resin occurs at pH=1-5;the adsorption behavior of Pd2+ on the carried thiourea resin obeys the Freundlich isotherm;at 303-313 K and the amount adsorbed of Pd2+ of 60-80 mg/g(mass... |
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| Keywords: | Pd2+ |
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