Wu Meifen, Zhao Guohua, Li Mingfang, Liu Lei, Li Dongming
Department of Chemistry, Tongji University, Shanghai 200092, PR China.
J Hazard Mater. 2009 Apr 15;163(1):26-31. doi: 10.1016/j.jhazmat.2008.06.050. Epub 2008 Jun 21.
The electrochemical degradation of chloride-mediated and chloride-free dye wastewaters was investigated on a boron-doped diamond (BDD) electrode in comparison with that on a dimensionally stable anode (DSA), and the applicability of BDD electrode to the degradation of these two kinds of wastewaters was explored. In chloride-free wastewater, the electrochemical degradation efficiency of dye on BDD electrode was much higher than that on DSA, with a chemical oxygen demand (COD) removal of 100% and 26% for BDD and DSA, respectively. In chloride-mediated dye wastewater, COD removal was faster than that in chloride-free wastewater on both BDD and DSA electrodes with COD removal efficiencies higher than 95%, whereas the rate of COD removal on DSA was faster than that on BDD electrode. The investigation indicates that DSA is more suitable than BDD electrode in degradation of originally chloride contained dye wastewaters for the sake of energy and time saving. However, for chloride-free dye wastewaters, with the aim of environmental protection, BDD electrode is more appropriate to realize complete mineralization. At the same time, the secondary pollution can be avoided.
在硼掺杂金刚石（BDD）电极上研究了氯化物介导的和无氯化物的染料废水的电化学降解，并与尺寸稳定阳极（DSA）上的进行了比较，探讨了BDD电极对这两种废水降解的适用性。在无氯化物废水中，BDD电极上染料的电化学降解效率远高于DSA，BDD和DSA的化学需氧量（COD）去除率分别为100%和26%。在氯化物介导的染料废水中，BDD和DSA电极上的COD去除速度均比无氯化物废水快，COD去除效率均高于95%，而DSA上的COD去除速度比BDD电极快。研究表明，为了节省能源和时间，在降解原含氯化物的染料废水方面，DSA比BDD电极更合适。然而，对于无氯化物的染料废水，为了保护环境，BDD电极更适合实现完全矿化。同时，可以避免二次污染。
