Electrochemical treatment of aqueous wastes containing pyrogallol by BDD-anodic oxidation.
Electrochemical treatment of aqueous wastes containing pyrogallol by BDD-anodic oxidation.
复制标题
通过 BDD 阳极氧化对含有连苯三酚的水性废物进行电化学处理。
DOI：
10.1016/j.jenvman.2007.12.007
复制
发表时间：
2009
影响因子：
8.7
通讯作者：
Gadri Abdellatif
中科院分区：
文献类型：
--
作者：
Bensalah Nasr;Trabelsi Hsen;Gadri Abdellatif
在这项工作中，研究了邻苯三酚（1,2,3-三羟基苯）在硼掺杂金刚石阳极上的电化学氧化。伏安结果表明，邻苯三酚氧化发生在与苯酚相同的电位区域，且支持电解质稳定。含有连苯三酚的合成废水已在小型电解厂中进行了处理。该工厂以不连续模式运行，通过单室电化学流通池连续再循环废物。连苯三酚和电产生的污染物在电解装置中得到完全矿化。 HPLC分析表明形成了作为主要中间体的羧酸。人们发现电化学过程的效率主要取决于废物中存在的污染物浓度和所施加的电流密度。该技术的高效率可以通过BDD表面的直接电氧化以及羟基自由基和其他电产生氧化剂进行的氧化来解释。
In this work, the electrochemical oxidation of pyrogallol (1,2,3-trihydroxybenzene) on boron-doped diamond anodes has been studied. The voltammetric results showed that pyrogallol oxidation takes place in the same potential region as that of phenol where the supporting electrolyte is stable. Synthetic wastewaters containing pyrogallol have been treated in a bench-scale electrolysis plant. This plant operates in a discontinuous mode by recirculating the waste continuously through a single-chamber electrochemical flow cell. The complete mineralization of pyrogallol and the electro-generated pollutants is obtained in the electrolytic device. HPLC analyses show the formation of carboxylic acids as the main intermediates. The efficiency of the electrochemical process was found to depend mainly on the pollutant concentration present in the waste and on the applied current density. The high efficiency of this technology can be explained in terms of the direct electro-oxidation at the BDD surface and the oxidation carried out by hydroxyl radicals and other electro-generated oxidants.