Electro-combustion of polyacrylates with boron-doped diamond anodes

被引:68
作者
Bellagamba, R
Michaud, PA
Comninellis, C
Vatistas, N
机构
[1] Univ Pisa, Dept Chem Engn, I-56126 Pisa, Italy
[2] Swiss Fed Inst Technol, Inst Chem Engn, CH-1015 Lausanne, Switzerland
关键词
wastewater treatment; electrolysis; anodic oxidation; boron-doped diamond electrode; electrochemical combustion; polyacrylate oxidation;
D O I
10.1016/S1388-2481(01)00302-2
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The electro-combustion of water soluble polymeric contaminants like polyacrylates (PA) in aqueous acid solution using a boron-doped diamond (BDD) anode has been investigated by bulk electrolysis in 1 mol dm(-3) HClO4 under galvanostatic conditions in a wide range of PA concentrations and current densities. In all cases complete electro-combustion of PA has been achieved and this is the first successful report for the electro-combustion of soluble organic polymers. The experimental chemical oxygen demand (COD) and instantaneous current efficiency (ICE) values are well predicted from a theoretical model which suppose that the rate of electro-combustion of PA with electrogenerated active intermediates (probably hydroxyl radicals) is a fast reaction and is controlled by mass transport of PA towards the anode (concept of the "ideal anode" for electro-combustion). (C) 2002 Published by Elsevier Science B.V.
引用
收藏
页码:171 / 176
页数:6
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