Electrochemical oxidation of biological pretreated and membrane separated landfill leachate concentrates on boron doped diamond anode
Electrochemical oxidation of biological pretreated and membrane separated landfill leachate concentrates on boron doped diamond anode
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DOI：
10.1016/j.apsusc.2016.03.045
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发表时间：
2016-07
影响因子：
6.7
通讯作者：
Bo Zhou;Zhiming Yu;Qiu-ping Wei;Hangyu Long;Youneng Xie;Yijia Wang
中科院分区：
文献类型：
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作者：
Bo Zhou;Zhiming Yu;Qiu-ping Wei;Hangyu Long;Youneng Xie;Yijia Wang
本研究采用热丝化学气相沉积（HFCVD）方法在铌（Nb）衬底上制备了具有优异电化学性能的高质量掺硼金刚石（BDD）电极。研究了圆盘管反渗透（DTRO）过程中垃圾渗滤液浓缩液在BDD阳极上的电化学氧化。考察了电流密度、初始pH、流速和正极材料等不同操作参数对降解效率的影响，以及化学需氧量（COD）和铵态氮（nh3单键dn）的变化。用瞬时电流效率（ICE）来评价不同的操作条件。结果表明，最佳工艺条件为电流密度50 mA cm−2，pH 5.16，流速6 L h−1。在此条件下，处理6 h后，COD去除率为87.5%，nh3单键dn去除率为74.06%，比能耗为223.2 kWh m−3。综上所述，BDD/Nb阳极电化学氧化是处理垃圾渗滤液浓缩液的有效方法。
In the present study, the high quality boron-doped diamond (BDD) electrodes with excellent electrochemical properties were deposited on niobium (Nb) substrates by hot filament chemical vapor deposition (HFCVD) method. The electrochemical oxidation of landfill leachate concentrates from disc tube reverse osmosis (DTRO) process over a BDD anode was investigated. The effects of varying operating parameters, such as current density, initial pH, flow velocity and cathode material on degradation efficiency were also evaluated following changes in chemical oxygen demand (COD) and ammonium nitrogen (NH3single bondN). The instantaneous current efficiency (ICE) was used to appraise different operating conditions. As a result, the best conditions obtained were as follows, current density 50 mA cm−2, pH 5.16, flow velocity 6 L h−1. Under these conditions, 87.5% COD and 74.06% NH3single bondN removal were achieved after 6 h treatment, with specific energy consumption of 223.2 kWh m−3. In short, these results indicated that the electrochemical oxidation with BDD/Nb anode is an effective method for the treatment of landfill leachate concentrates.