催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (5): 445-448.

• 研究论文 • 上一篇    下一篇

S2O2-8派生氧化法催化降解水中的甲基橙

张乃东1,张曼霞1,彭永臻2   

  1. 1 大连海事大学环境科学与工程学院, 辽宁大连 116026; 2 北京工业大学水质科学与水环境恢复工程重点实验室, 北京 100022
  • 收稿日期:2006-05-25 出版日期:2006-05-25 发布日期:2006-05-25

Catalytic Degradation of Methylorange in Water by Derivable Oxidation with Peroxydisulfate

ZHANG Naidong1*, ZHANG Manxia1, PENG Yongzhen2   

  1. 1 College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, Liaoning, China; 2 Key Laboratory of Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100022, China
  • Received:2006-05-25 Online:2006-05-25 Published:2006-05-25

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741

被引次数

34

摘要： S2O2-8在Ag+的催化作用下可生成 SO-4· 和Ag2+, SO-4· 和Ag2+ 具有极强的氧化能力,其电极电位分别为E0Ag2+/Ag+=1.989 V, E0SO-4·/SO2-4=3.64 V. 本文研究了S2O2-8+Ag+体系中甲基橙的降解情况,并用紫外光谱、总有机碳(TOC)和高效液相色谱/质谱对降解过程进行了表征. 在pH=1的S2O2-8+Ag+体系中,反应8 min时, 5 μmol/L的甲基橙色度去除率达100%. 2 h后,水样中有悬浮物出现,过滤后样品TOC去除率为8.6%; 在同样条件下, Fenton法对甲基橙TOC去除率为10%. 在促使有机物矿化方面, S2O2-8+Ag+法与Fenton法的效果基本相同.

关键词: 过二硫酸根, 银离子, 硫酸根自由基, 甲基橙

Abstract: S2O2-8 can be transformed into Ag2+and SO-4• by catalysis of Ag+. Ag2+ and SO-4• are strong oxidants (E0Ag2+/Ag+=1.989 V, E0SO-4•/SO2-4=3.64 V). The degradation of methylorange in S2O2-8+Ag+ system was studied with the measurements of ultraviolet spectrometry, total organic carbon [HJ30x](TOC), and high performance liquid chromatography-mass spectrometry. When pH=1, the dye decolorization efficiency of 5 μmol/L methylorange was up to 100% after 8 min reaction in the S2O2-8+Ag+ system. Suspending grains were observed in water after reaction for 2 h, and the TOC removal efficiency was up to 8.6%. TOC removal efficiency was 10% by Fenton method under the same conditions. Considering the enhancement on organism mineralization, S2O2-8+Ag+ and Fenton methods show the similar efficiency.

Key words: peroxydisulfate, silver ion, sulfate radical anion, methylorange