Accelerated degradation of orange G over a widepH range in the presence of FeVO

2018年第12卷第1期

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《环境科学与工程前沿（英文）》 >> 2018年第12卷第1期 doi: 10.1007/s11783-018-1013-3

Accelerated degradation of orange G over a widepH range in the presence of FeVO

. College of Environmental and ResourceSciences, Dalian Nationalities University, Dalian 116600, China.. College of Life Science, Dalian NationalitiesUniversity, Dalian 116600, China

发布日期： 2018-01-05

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摘要

In this study, FeVO was prepared andused as Fenton-like catalyst to degrade orange G (OG) dye. The removalof OG in an aqueous solution containing 0.5 g·L FeVO and 15 mmol·L hydrogen peroxide at pH 7.0 reached 93.2%. Similar rates were achievedat pH 5.7 ( = 0.0471 min ), pH 7.0 ( = 0.0438 min ), and pH 7.7 ( = 0.0434 min ). The FeVO catalyst successfullyovercomes the problem faced in the heterogeneous Fenton process, i.e.,the narrow working pH range. The data for the removal of OG in FeVO systems containing H O conform to the Langmuir–Hinshelwood model ( = 0.9988),indicating that adsorption and surface reaction are the two basicmechanisms for OG removal in the FeVO –H O system. Furthermore, the irradiationof FeVO by visible light significantly increasesthe degradation rate of OG, which is attributed to the enhanced ratesof the iron cycles and vanadium cycles.

关键词

Azo dye ; Degradation ; FeVO₄ ; Kinetics ; Advanced oxidation processes