Heterogeneous electro-Fenton catalyst for 1-butylpyridinium chloride degradation

被引:31
|
作者
Meijide, Jessica [1 ]
Pazos, Marta [1 ]
Angeles Sanroman, Maria [1 ]
机构
[1] Univ Vigo, Dept Chem Engn, Isaac Newton Bldg,Campus Lagoas, Vigo 36310, Spain
关键词
Electro-Fenton; Heterogeneous catalyst; Pyridinium-based ionic liquid; Toxicity; IONIC LIQUIDS; ANODIC-OXIDATION; WASTE-WATER; ORGANIC POLLUTANTS; AQUEOUS-SOLUTION; IMIDAZOLIUM; MINERALIZATION; TOXICITY; BIODEGRADABILITY; KINETICS;
D O I
10.1007/s11356-017-0403-6
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The application of the electro-Fenton process for organic compound mineralisation has been widely reported over the past years. However, operational problems related to the use of soluble iron salt as a homogeneous catalyst involve the development of novel catalysts that are able to operate in a wide pH range. For this purpose, polyvinyl alcohol-alginate beads, containing goethite as iron, were synthesised and evaluated as heterogeneous electro-Fenton catalyst for 1-butylpyridinium chloride mineralisation. The influence of catalyst dosage and pH solution on ionic liquid degradation was analysed, achieving almost total oxidation after 60min under optimal conditions (2g/L catalyst concentration and pH3). The results showed good catalyst stability and reusability, although its effectiveness decreases slightly after three successive cycles. Furthermore, a plausible mineralisation pathway was proposed based on the oxidation byproducts determined by chromatographic techniques. Finally, the Microtox (R) test revealed notable detoxification after treatment which demonstrates high catalyst ability for pyridinium-based ionic liquid degradation by the electro-Fenton process.
引用
收藏
页码:3145 / 3156
页数:12
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