State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China; School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, PR China.
Sci Total Environ. 2017 Feb 1;579:1600-1607. doi: 10.1016/j.scitotenv.2016.11.180. Epub 2016 Dec 5.
Zr-doped nanocrystalline PbO (Zr-PbO) film electrodes were prepared at different bath temperatures. The Zr-PbO electrode doped at 75°C (75-Zr-PbO) featured high oxygen evolution overpotential, large effective area and good electrocatalytic performance. The oxygen evolution potential and the effective area of 75-Zr-PbO achieved 1.91V (vs. SCE) and 9.1cm, respectively. The removal efficiency and the defluorination ratio of PFOA reached 97.0% and 88.1% after 90min electrolysis. The primary mineralization products (i.e., F and intermediates) and their change trends were determined. The 75-Zr-PbO electrode was introduced to sequentially treat the PFOA wastewater. In an 116h of 75-Zr-PbO electrocatalysis sequential process, the PFOA, PFHpA, PFHxA, PFPeA, PFBA, PFPrA, TFA, and TOC concentrations were reduced to below 30, 2.5, 1.3, 1.0, 0.5, 0.2, 0.1, and 9mgL, respectively, demonstrating the promising application of the sequential treatment system for the treatment of PFOA wastewater.
Zr 掺杂纳米晶 PbO（Zr-PbO）薄膜电极在不同的浴温下制备。在 75°C 下掺杂的 Zr-PbO 电极（75-Zr-PbO）具有高析氧过电位、大有效面积和良好的电催化性能。75-Zr-PbO 的析氧电位和有效面积分别达到 1.91V（相对于 SCE）和 9.1cm。经过 90min 电解，PFOA 的去除效率和脱氟率分别达到 97.0%和 88.1%。确定了主要的矿化产物（即 F 和中间体）及其变化趋势。将 75-Zr-PbO 电极引入到 PFOA 废水的顺序处理中。在 75-Zr-PbO 电催化顺序处理的 116h 内，PFOA、PFHpA、PFHxA、PFPeA、PFBA、PFPrA、TFA 和 TOC 的浓度分别降低至 30、2.5、1.3、1.0、0.5、0.2、0.1 和 9mgL 以下，表明顺序处理系统在处理 PFOA 废水方面具有广阔的应用前景。
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