Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis
Heterogeneous Fenton-like degradation of Rhodamine 6G in water using CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis
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DOI：
10.1016/j.jhazmat.2010.05.016
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发表时间：
2010-09-15
影响因子：
13.6
通讯作者：
Prihod'ko, R. V.
中科院分区：
文献类型：
--
作者：
Dukkanci, M.;Gunduz, G.;Prihod'ko, R. V.
在水热合成CuFeZSM-5沸石催化剂上，研究了反应性偶氮染料罗丹明6G在水中的非均相fenton类降解。在初始pH为3.4时，反应时间为45 min，脱色率为100%。氧化2h后TOC去除率为51.8%。初始脱色速率为-r(A0) = 4.56 × 10(2) e(-24.83/RT) CR6G.00CH2O2,00.35，其中R的单位为kJ/mol。沸石结构中的铁和铜阳离子在氧化过程中浸出到溶液中，对pH值有很强的依赖性。pH从6.5（染料溶液pH）调节到3.4，铁的浸出从0.7到0.8 mg/dm(3)，铜的浸出从1.4到2.1 mg/dm(3)。在pH为3.4的条件下，铜完全从催化剂中浸出。(C) 2010 Elsevier B.V.版权所有
In this study, heterogeneous Fenton-like degradation of reactive azo dye Rhodamine 6G in water was investigated over a CuFeZSM-5 zeolite catalyst prepared by hydrothermal synthesis. At initial pH of 3.4, a color removal of 100% was achieved after a reaction time of 45 min. TOC elimination was measured to be 51.8% after 2h of oxidation. Initial decolorization rate was described by an equation of -r(A0) = 4.56 x 10(2) e(-24.83/RT) CR6G.00CH2O2,00.35 where R is in kJ/mol. The leaching of iron and copper cations from zeolite structure into the solution during oxidation was dependent on pH strongly. The regulation of pH from 6.5 (dye solution pH) to 3.4, increased leaching for iron from 0.7 to 0.8 mg/dm(3) and for copper from 1.4 to 2.1 mg/dm(3). The copper was totally leached from the catalyst during the process at pH 3.4. (C) 2010 Elsevier B.V. All rights reserved.