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UV/Mn2+协同催化H2O2氧化降解染料X-3B的研究

STUDY ON DEGRADATION OF DYE X-3B BY H2O2 OF SYNCATALYTIC DECOMPOSITION BASED ON UV/MN2+

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【作者】 李琴成功夏东升熊重铎曾庆福

【Author】 Li Qin, Cheng Gong, Xia Dongsheng, Xiong Chongduo, Zeng Qingfu (Wuhan University Of Science and Engineering, Engineering Research Center for Clean Production of Textile Printing, Ministry of Education, WuHan 430073, China)

【机构】 武汉科技学院,纺织印染清洁生产教育部工程研究中心

【摘要】 研究了UV和Mn2+协同催化H2O2(UV/Mn2+-H2O2)降解染料活性艳红X-3B的过程。结果表明,X-3B在UV/Mn2+-H2O2中的降解速率达0.0984min-1,是Mn2+催化H2O2和UV催化H2O2速率之和的3.0倍,协同催化作用加速了·OH对废水的降解。对初始质量浓度为150mg·L-1的X-3B溶液,初始pH为4、MnSO4及H2O2的投加量分别为2和10mmol·L-1,反应60min后,脱色率达到100%,而该条件下染料的极限降解量为294mg·L-1。UV-vis光谱分析发现X-3B在可见光区的吸收几乎完全消失,在211nm处产生新吸收峰,说明降解过程产生了新的中间产物。

【Abstract】 The degradation of dye X-3B by the H2O2 of Syncatalytic Decomposition based on UV/Mn2+ (UV/Mn2+-H2O2) was investigated. The results showed that the degradation rate of UV/Mn2+-H2O2 process reached 0.098 4 min-1, which was 3.0 times higher than the combination of H2O2/Mn2+ and UV/H2O2. For 150 mg·L-1 X-3B, on the best condition of the initial pH value was 4, the dosage of Mn2+ and H2O2 were 2 mmol·L-1 and 10 mmol·L-1, respectively, the removal efficiency was 100% within 60 min. In this condition, the ultimate concentration of degradation was 294 mg·L-1. The temporal change of UV-vis spectrum also indicated that an almost complete disappearance at visible absorption region, while a new absorption peak at 211 nm appeared at UV region.

【基金】 国家“十一五”科技支撑计划项目(2006BAC02A00)
  • 【文献出处】 水处理技术 ,Technology of Water Treatment , 编辑部邮箱 ,2009年07期
  • 【分类号】X703
  • 【被引频次】10
  • 【下载频次】198
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