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磁性膨润土的制备、表征及类Fenton催化降解橙黄Ⅱ

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王光华, 万栋, 李文兵, 鲁云洲, 陈坤. 磁性膨润土的制备、表征及类Fenton催化降解橙黄Ⅱ[J]. 环境工程学报, 2014, 8(5): 1857-1862.
引用本文: 王光华, 万栋, 李文兵, 鲁云洲, 陈坤. 磁性膨润土的制备、表征及类Fenton催化降解橙黄Ⅱ[J]. 环境工程学报, 2014, 8(5): 1857-1862.
shu
Wang Guanghua, Wan Dong, Li Wenbing, Lu Yunzhou, Chen Kun. Synthesis, characterization and Fenton-like degradation for Orange Ⅱ of magnetic bentonite[J]. Chinese Journal of Environmental Engineering, 2014, 8(5): 1857-1862.
Citation: Wang Guanghua, Wan Dong, Li Wenbing, Lu Yunzhou, Chen Kun. Synthesis, characterization and Fenton-like degradation for Orange Ⅱ of magnetic bentonite[J]. Chinese Journal of Environmental Engineering, 2014, 8(5): 1857-1862.
shu

磁性膨润土的制备、表征及类Fenton催化降解橙黄Ⅱ

  • 1.

    武汉科技大学化学工程与技术学院, 武汉 430081

  • 基金项目:

    高等学校博士学科点专项科研基金资助项目（20114219110002）

    湖北省教育厅重点项目（D20131107）

    煤转化与新型炭材料湖北省重点实验室开放基金资助项目（WKDM201107）

  • 中图分类号: X703

Synthesis, characterization and Fenton-like degradation for Orange Ⅱ of magnetic bentonite

  • 1.

    College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China

  • Fund Project:

  • 摘要: 以铝柱撑膨润土和铁盐为原料，采用共沉淀法制备纳米Fe3O4负载的磁性膨润土复合材料。采用X射线衍射（XRD）、扫描电子显微镜（SEM）和比表面孔隙分析（BET）对样品进行表征，研究了磁性膨润土对橙黄Ⅱ的类Fenton催化降解性能，并考察了催化剂用量、温度和初始pH、H2O2初始浓度等因素对降解效果的影响。结果表明，Fe3O4均匀负载在膨润土表面，未发生明显团聚，并且改善了膨润土的孔隙结构，增加了其比表面积。在磁性膨润土用量为0.6 g/L，温度为40℃，pH为3.0，H2O2初始浓度为21 mmol/L的条件下，0.5 mmol/L橙黄Ⅱ溶液在180 min内色度去除率和UV254去除率分别达到100%和97%，且催化剂重复使用4次效果稳定。
    Abstract: Magnetic bentonite with much improved Fenton-like catalytic activity was successfully prepared through co-precipitation method using iron salt and Al-pillared bentonite as primary raw materials. The characterizations with XRD, SEM and BET indicated that the magnetite nanoparticles exist on the surface of bentonite, with better dispersing, less coaggregation and greater BET surface area (129.41 m2/g) than the ones without bentonite support. The degradation of Orange Ⅱ in UV-Fenton system was carried out to investigate the catalytic activity of synthesized magnetic bentonite. The effects of catalysts dosage, temperature, initial pH and concentration of H2O2 on Orange Ⅱ degradation were studied in detail. As a result, 100% decolorization and 97% UV254 removal rate of 0.5 mmol/L of Orange Ⅱcould be obtained at 180 min in the presence of 0.6 g/L of magnetic bentonite, 21 mmol/L of H2O2, pH= 3 and T = 40℃. The catalysts also show good stability in recycling test with acceptable activity decay.
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  • 收稿日期:  2013-05-15
  • 刊出日期:  2014-05-06
王光华, 万栋, 李文兵, 鲁云洲, 陈坤. 磁性膨润土的制备、表征及类Fenton催化降解橙黄Ⅱ[J]. 环境工程学报, 2014, 8(5): 1857-1862.
引用本文: 王光华, 万栋, 李文兵, 鲁云洲, 陈坤. 磁性膨润土的制备、表征及类Fenton催化降解橙黄Ⅱ[J]. 环境工程学报, 2014, 8(5): 1857-1862.
shu
Wang Guanghua, Wan Dong, Li Wenbing, Lu Yunzhou, Chen Kun. Synthesis, characterization and Fenton-like degradation for Orange Ⅱ of magnetic bentonite[J]. Chinese Journal of Environmental Engineering, 2014, 8(5): 1857-1862.
Citation: Wang Guanghua, Wan Dong, Li Wenbing, Lu Yunzhou, Chen Kun. Synthesis, characterization and Fenton-like degradation for Orange Ⅱ of magnetic bentonite[J]. Chinese Journal of Environmental Engineering, 2014, 8(5): 1857-1862.
shu

磁性膨润土的制备、表征及类Fenton催化降解橙黄Ⅱ

  • 1. 武汉科技大学化学工程与技术学院, 武汉 430081
  • 收稿日期:  2013-05-15
基金项目:

高等学校博士学科点专项科研基金资助项目（20114219110002）

湖北省教育厅重点项目（D20131107）

煤转化与新型炭材料湖北省重点实验室开放基金资助项目（WKDM201107）

摘要: 以铝柱撑膨润土和铁盐为原料，采用共沉淀法制备纳米Fe3O4负载的磁性膨润土复合材料。采用X射线衍射（XRD）、扫描电子显微镜（SEM）和比表面孔隙分析（BET）对样品进行表征，研究了磁性膨润土对橙黄Ⅱ的类Fenton催化降解性能，并考察了催化剂用量、温度和初始pH、H2O2初始浓度等因素对降解效果的影响。结果表明，Fe3O4均匀负载在膨润土表面，未发生明显团聚，并且改善了膨润土的孔隙结构，增加了其比表面积。在磁性膨润土用量为0.6 g/L，温度为40℃，pH为3.0，H2O2初始浓度为21 mmol/L的条件下，0.5 mmol/L橙黄Ⅱ溶液在180 min内色度去除率和UV254去除率分别达到100%和97%，且催化剂重复使用4次效果稳定。

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