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CTAB改性纳米零价铁的制备与橙黄Ⅱ的降解

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王培, 王向宇, 和婧, 刘坤乾. CTAB改性纳米零价铁的制备与橙黄Ⅱ的降解[J]. 环境工程学报, 2016, 10(6): 2902-2908. doi: 10.12030/j.cjee.201501005
引用本文: 王培, 王向宇, 和婧, 刘坤乾. CTAB改性纳米零价铁的制备与橙黄Ⅱ的降解[J]. 环境工程学报, 2016, 10(6): 2902-2908. doi: 10.12030/j.cjee.201501005
shu
Wang Pei, Wang Xiangyu, He Jing, Liu Kunqian. Modification of nano zero-valent iron by CTAB for decolorization of orange Ⅱ[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2902-2908. doi: 10.12030/j.cjee.201501005
Citation: Wang Pei, Wang Xiangyu, He Jing, Liu Kunqian. Modification of nano zero-valent iron by CTAB for decolorization of orange Ⅱ[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2902-2908. doi: 10.12030/j.cjee.201501005
shu

CTAB改性纳米零价铁的制备与橙黄Ⅱ的降解

  • 1.

    昆明理工大学环境科学与工程学院, 昆明 650500

  • 基金项目:

    国家自然科学基金资助项目(51368025,51068011)

    国家留学基金委资助项目(20105024)

    大学生创新训练项目(201210674108)

  • 中图分类号: X522

Modification of nano zero-valent iron by CTAB for decolorization of orange Ⅱ

  • 1.

    Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

  • Fund Project:

  • 摘要: 以十六烷基三甲基溴化胺(CTAB)为分散剂,制备改性纳米零价铁颗粒(CNZVI)。比表面积、XRD、SEM和TEM表征结果表明改性的CNZVI比未改性纳米零价铁颗粒(BNZVI)粒径更小、更均匀,具有更好的分散性能和抗氧化性。首次考察了CNZVI对于水中染料橙黄Ⅱ的脱色降解效果。CNZVI对橙黄Ⅱ的脱色率和降解速率均优于未改性纳米铁颗粒BNZVI,脱色率在反应进行10 min后趋于稳定。考察了溶液pH、初始浓度、NZVI投加量和温度对反应脱色率的影响。pH值和初始浓度越高,脱色率越低;脱色率随着投加量和温度提高而增大。最后优化反应条件为:pH值5.96,初始浓度100 mg/L,NZVI投加量0.2 g/L,反应温度293 K,CNZVI对橙黄Ⅱ的脱色率为91.8%,比BNZVI的脱色率高出16.1%。动力学分析表明,CNZVI对橙黄Ⅱ降解反应符合伪一级反应动力学。
    Abstract: Hexadecyl trimethyl ammonium bromide (CTAB) was used as a dispersant for the modification of nano zero-valent iron particles. CTAB-modified nano zero-valent iron particles (CNZVI) were synthesized by the former synthesis method. The particles were characterized by specific surface area analysis, XRD, SEM, and TEM. The particle size of CNZVI was decreased compared with bare nano zero-valent iron particles (BNZVI), while its dispersity and antioxidizability increased. Using orange Ⅱ as the target pollutant, the decolorization efficiencies of CNZVI and BNZVI were investigated. The results showed that decolorization efficiency tended towards stability within 10 min, and the decolorization efficiency and reaction rate of CNZVI were higher than that of BNZVI. The effects of pH, initial concentration, iron dosage, and temperature on the reaction were also studied. The decolorization efficiency decreased on increasing the pH and initial concentration, while it increased on increasing the iron dosage and temperature. The optimized decolorization conditions for orange Ⅱ were as follows: pH 5.96, initial concentration of 100 mg/L, NZVI dosage of 0.2 g/L, and reaction temperature of 293 K. The decolorization efficiency of CNZVI was as high as 91.8%, which was 16.1% higher than that of BNZVI under optimum conditions. Through dynamics calculations, the degradation of orange Ⅱ was found to fit well with pseudo first order reaction kinetics.
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出版历程
  • 收稿日期:  2015-04-01
  • 刊出日期:  2016-06-03
王培, 王向宇, 和婧, 刘坤乾. CTAB改性纳米零价铁的制备与橙黄Ⅱ的降解[J]. 环境工程学报, 2016, 10(6): 2902-2908. doi: 10.12030/j.cjee.201501005
引用本文: 王培, 王向宇, 和婧, 刘坤乾. CTAB改性纳米零价铁的制备与橙黄Ⅱ的降解[J]. 环境工程学报, 2016, 10(6): 2902-2908. doi: 10.12030/j.cjee.201501005
shu
Wang Pei, Wang Xiangyu, He Jing, Liu Kunqian. Modification of nano zero-valent iron by CTAB for decolorization of orange Ⅱ[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2902-2908. doi: 10.12030/j.cjee.201501005
Citation: Wang Pei, Wang Xiangyu, He Jing, Liu Kunqian. Modification of nano zero-valent iron by CTAB for decolorization of orange Ⅱ[J]. Chinese Journal of Environmental Engineering, 2016, 10(6): 2902-2908. doi: 10.12030/j.cjee.201501005
shu

CTAB改性纳米零价铁的制备与橙黄Ⅱ的降解

  • 1. 昆明理工大学环境科学与工程学院, 昆明 650500
  • 收稿日期:  2015-04-01
基金项目:

国家自然科学基金资助项目(51368025,51068011)

国家留学基金委资助项目(20105024)

大学生创新训练项目(201210674108)

摘要: 以十六烷基三甲基溴化胺(CTAB)为分散剂,制备改性纳米零价铁颗粒(CNZVI)。比表面积、XRD、SEM和TEM表征结果表明改性的CNZVI比未改性纳米零价铁颗粒(BNZVI)粒径更小、更均匀,具有更好的分散性能和抗氧化性。首次考察了CNZVI对于水中染料橙黄Ⅱ的脱色降解效果。CNZVI对橙黄Ⅱ的脱色率和降解速率均优于未改性纳米铁颗粒BNZVI,脱色率在反应进行10 min后趋于稳定。考察了溶液pH、初始浓度、NZVI投加量和温度对反应脱色率的影响。pH值和初始浓度越高,脱色率越低;脱色率随着投加量和温度提高而增大。最后优化反应条件为:pH值5.96,初始浓度100 mg/L,NZVI投加量0.2 g/L,反应温度293 K,CNZVI对橙黄Ⅱ的脱色率为91.8%,比BNZVI的脱色率高出16.1%。动力学分析表明,CNZVI对橙黄Ⅱ降解反应符合伪一级反应动力学。

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