摘要：

采用溶胶-凝胶法制备了CuFe₂O₄-GO活化剂，并研究了其活化过一硫酸盐（PMS）降解酸性红B（ARB）的效果。结果表明，当CuFe₂O₄-GO投加量为0.1 g/L，n（PMS）：n（ARB）=10：1，pH=7.0时，反应10 min后ARB降解率可达96%；Cl^-对ARB降解无显著影响。自由基猝灭实验表明，反应体系中非自由基（¹O₂）发挥了主要作用；紫外可见光谱分析结果表明，降解后ARB分子中的萘环和偶氮键结构均被破坏；TOC分析表明，反应体系对ARB染料具有一定的矿化率。CuFe₂O₄-GO在循环使用5次后仍有较好的活化效果。

关键词: 酸性红B, 石墨烯-铁酸铜, 过一硫酸盐, 单线态氧, 硫酸根自由基

Abstract:

The CuFe₂O₄-GO was synthesized by sol-gel method. The Acid Red B(ARB) was degraded by the activation of peroxymonosulfate with CuFe₂O₄-GO. The results showed that the ARB removal rate reached 96% after 10 min reaction with 0.1 g/L CuFe₂O₄-GO dosage, 10:1 of PMS and ARB molar ratio and pH 7.0. The concentration of Cl^- had no significant effect on the degradation of ARB. Free radical identification experiments showed that non-radical pathway(¹O₂) played a primary role during the whole process. From UV-vis spectra results, the naphthalene ring and azo band of ARB were found to be destroyed. The TOC analysis indicated that the CuFe₂O₄-GO/PMS system could obtain a certain degree of ARB mineralization. After five rounds of test, the CuFe₂O₄-GO still had an excellent performance for the activation of PMS.

Key words: Acid Red B, CuFe₂O₄-GO, peroxymonosulfate, singlet oxygen, sulfate radical

中图分类号: 

• X703