| 引用本文: | 赵志伟,何皎洁,刘杰.新型磁性Fe/Mn纳米复合材料对水中铅离子的去除[J].哈尔滨工业大学学报,2012,44(8):27.DOI:10.11918/j.issn.0367-6234.2012.08.006 |
| ZHAO Zhi-wei,HE Jiao-jie,LIU Jie.Effect of magnetic Fe/Mn nanocomposites on the removal of lead ion in the aqueous solution[J].Journal of Harbin Institute of Technology,2012,44(8):27.DOI:10.11918/j.issn.0367-6234.2012.08.006 |
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| 摘要: |
| 为了有效去除水中的铅离子,实验制备以MnO2为吸附表面的磁性Fe/Mn纳米复合吸附剂,并进行了吸附实验研究,分析pH、温度等参数对吸附的影响．结果发现,从298 K Langmuir等温吸附曲线可以计算出Fe/Mn复合吸附剂对Pb2+的饱和吸附量(Q0=118.06 mg/L)．复合吸附剂对Pb2+的吸附总量正比于pH(1.5～5)和温度(303～323 K)．在研究纳米复合材料对铅离子的吸附动力学实验中发现,纳米复合材料和铅离子之间的吸附动力学符合假二级模型,通过相关热力学研究计算得到纳米材料和铅离子之间为吸热反应． |
| 关键词: 磁性Fe/Mn纳米复合材料 离子交换 Pb2+ 吸附 |
| DOI：10.11918/j.issn.0367-6234.2012.08.006 |
| 分类号: |
| 基金项目:国家“十一五”水体污染控制与治理科技重大专项(2008ZX07421);天津市水质科学与技术重点实验室开放研究基金资助项目． |
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| Effect of magnetic Fe/Mn nanocomposites on the removal of lead ion in the aqueous solution |
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ZHAO Zhi-wei, HE Jiao-jie, LIU Jie
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School of Municipal and Environmental Engineering, Harbin Institute of Technology, 150090 Harbin, China
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| Abstract: |
| In this paper, magnetic Fe/Mn nanocomposites were synthesized for the removal of Pb2+ from solution. The adsorption capacity and the influence factors such as pH and temperature were analyzed. The results showed that the maximum adsorption capacity (Q0) of the sorbents towards Pb2+was 118.06 mg/L according to the Langmuir isotherms (298 K). The Pb2+ removal capacity of the adsorbents increased with the increase of pH (1.5-5) and temperature (303-323 K). In addition, the kinetic adsorption could be fitted by the pseudo-second-order model equation. At last, the thermodynamics of Pb2+ was studied at various temperature and the thermodynamic parameters were given which confirmed that the adsorption was endothermic reaction. |
| Key words: magnetic Fe/Mn naocomposites ion exchange Pb2+ adsorption |
