| 纳米级氧化铝的制备及其对铬的形态分析 |
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| 引用本文： | 喻德忠,汪国庆,艾军.纳米级氧化铝的制备及其对铬的形态分析[J].武汉化工学院学报,2012(1):10-13. |
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| 作者姓名： | 喻德忠 汪国庆 艾军 |
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| 作者单位： | 武汉工程大学化工与制药学院,绿色化工过程省部共建教育部重点实验室,湖北武汉430074 |
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| 摘 要： | 采用溶胶-凝胶法制备了纳米Al2O3，研究其对Cr（Ⅵ）和Cr（Ⅲ）的吸附，探讨了pH值、吸附时间、吸附体积和纳米Al2O3用量对吸附效果的影响，同时探讨了洗脱条件．结果表明：纳米Al2O3在pH：3．6对Cr（Ⅵ）的吸附率达到95％以上，在pH=9．1时对Cr（Ⅲ）的吸附率达到95％以上，分别以2mol／LNaOH溶液为Cr（Ⅵ）的洗脱剂，2mol／L HAc溶液为Cr（Ⅲ）的洗脱剂，在沸水浴中加热可完全洗脱纳米Al2O3所吸附的Cr（Ⅵ）和Cr（Ⅲ），试用于样品分析，结果满意．此研究对痕量铬的形态分离、富集及分析有较高的应用价值．
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| 关 键 词： | 纳米Al2O3 铬 分离富集 吸附 |
Preparation of nanometer-sized aluminum oxide and its speciation analysis of chromium |
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| YU De-zhong,WANG Guo-qing,AI Jun.Preparation of nanometer-sized aluminum oxide and its speciation analysis of chromium[J].Journal of Wuhan Institute of Chemical Technology,2012(1):10-13. |
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| Authors: | YU De-zhong WANG Guo-qing AI Jun |
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| Affiliation: | ( School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan 430074, China) |
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| Abstract: | Nanometer-sized aluminum oxide was prepared by Sol-Gel process and investigated the adsorption characteristics of Cr （Ⅲ） and Cr （Ⅵ）. Parameters affecting adsorption including, pH, adsorption time, adsorption volume and the quantity of nano-alumina particles, were evaluated in details. Meanwhile, the elution conditions had also been investigated. Results of experiments indicated that the adsorption rate of Cr （ Ⅵ ） and Cr （ Ⅲ） on ultrafine alumina particles was up to 95 % when the adsorption pH was 9.1 and 3.6 respectively. By employing 2 mol/L NaOH and 2 mol/L HAc as the eluant in boiling water bath, the Cr （ Ⅵ ） and Cr （ Ⅲ） ions adsorbed on uhrafine alumina particles could be washed up completely. The study has high value for chemical separation and recoveries of chromium. |
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| Keywords: | nanometer-sized alumina Cr separation and preconcentration adsorption |
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