Zhao Bo, Zhu Wenkun, Mu Tao, Hu Zuowen, Duan Tao
Key Subject Laboratory of National Defense for Radioactive Waste and Environmental Security, Southwest University of Science and Technology, Mianyang 621010, China.
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
Int J Environ Res Public Health. 2017 Jul 21;14(7):819. doi: 10.3390/ijerph14070819.
A novel Pt/ACF (Pt supported on activated carbon fibers) electrode was successfully prepared with impregnation and electrodeposition method. Characterization of the electrodes indicated that the Pt/ACF electrode had a larger effective area and more active sites. Electrochemical degradation of ethylenediaminetetra-acetic acid (EDTA) in aqueous solution with Pt/ACF electrodes was investigated. The results showed that the 3% Pt/ACF electrode had a better effect on EDTA removal. The operational parameters influencing the electrochemical degradation of EDTA with 3% Pt/ACF electrode were optimized and the optimal removal of EDTA and chemical oxygen demand (COD) were 94% and 60% after 100 min on condition of the electrolyte concentration, initial concentration of EDTA, current density and initial value of pH were 0.1 mol/L, 300 mg/L, 40 mA/cm² and 5.0, respectively. The degradation intermediates of EDTA in electrochemical oxidation with 3% Pt/ACF electrode were identified by gas chromatography-mass spectrum (GC-MS).
采用浸渍和电沉积法成功制备了一种新型的Pt/ACF（负载在活性炭纤维上的Pt）电极。电极表征表明，Pt/ACF电极具有更大的有效面积和更多的活性位点。研究了用Pt/ACF电极对水溶液中乙二胺四乙酸（EDTA）进行电化学降解。结果表明，3%Pt/ACF电极对EDTA的去除效果较好。优化了影响3%Pt/ACF电极对EDTA电化学降解的操作参数，在电解质浓度、EDTA初始浓度、电流密度和初始pH值分别为0.1mol/L、300mg/L、40mA/cm²和5.0的条件下，100min后EDTA和化学需氧量（COD）的最佳去除率分别为94%和60%。通过气相色谱-质谱联用仪（GC-MS）鉴定了3%Pt/ACF电极电化学氧化EDTA过程中的降解中间体。
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