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Fe2+与Fe0活化过二硫酸盐降解活性艳蓝KN-R

于 辉 金春姬 王鹏远 刘 明 贾红丽

于 辉, 金春姬, 王鹏远, 刘 明, 贾红丽. Fe2+与Fe0活化过二硫酸盐降解活性艳蓝KN-R[J]. 环境科学研究, 2015, 28(1): 88-95.
引用本文: 于 辉, 金春姬, 王鹏远, 刘 明, 贾红丽. Fe2+与Fe0活化过二硫酸盐降解活性艳蓝KN-R[J]. 环境科学研究, 2015, 28(1): 88-95.
YU Hui, JIN Chunji, WANG Pengyuan, LIU Ming, JIA Hongli. Degradation of Reactive Brilliant Blue KN-R by Persulfate Activated with Fe2+ and Fe0[J]. Research of Environmental Sciences, 2015, 28(1): 88-95.
Citation: YU Hui, JIN Chunji, WANG Pengyuan, LIU Ming, JIA Hongli. Degradation of Reactive Brilliant Blue KN-R by Persulfate Activated with Fe2+ and Fe0[J]. Research of Environmental Sciences, 2015, 28(1): 88-95.

Fe2+与Fe0活化过二硫酸盐降解活性艳蓝KN-R

基金项目: 山东省自然科学基金项目(ZR2011BM014)

Degradation of Reactive Brilliant Blue KN-R by Persulfate Activated with Fe2+ and Fe0

  • 摘要: 为了解Fe2+与Fe0在活化PDS(过二硫酸盐)降解活性艳蓝KN-R时的差异,通过序批试验,考察了Fe2+/PDS和Fe0/PDS体系中c(Fe2+)、ρ(Fe0)、c(PDS)和初始pH对KN-R降解的影响. 结果表明:在Fe2+/PDS体系中,最佳反应条件〔初始pH为3.0,c(Fe2+)为1.0 mmol/L,c(PDS)为2.0 mmol/L〕下,180 min后KN-R的去除率达到96.55%;过高的pH和c(Fe2+)对KN-R的降解均有明显的抑制作用. 在Fe0/PDS体系中,当pH和ρ(Fe0)过高时,KN-R的去除率仍维持在较高水平,当pH为9.0时,180 min后KN-R的去除率为90.53%;当ρ(Fe0)为448 mg/L时,50 min后KN-R的去除率就能达到94.35%. 在2个体系中,c(PDS)的升高均能显著提高KN-R的去除率,当c(PDS)由0.5 mmol/L增至8.0 mmol/L时,KN-R的去除率由47.25%(Fe2+/PDS体系)和57.00%(Fe0/PDS体系)增至100%. 动力学分析显示,KN-R的降解均遵循一级反应动力学;最佳反应条件下2个体系中的活性自由基均以硫酸根自由基(SO4-·)为主. 因此,在降解KN-R过程中,Fe0/PDS体系的性能明显优于Fe2+/PDS体系.

     

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出版历程
  • 收稿日期:  2014-02-25
  • 修回日期:  2014-08-15
  • 刊出日期:  2015-01-25

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