Pan Zonglin, Xin Hong, Xu Ruisong, Wang Pengcheng, Fan Xinfei, Song Yongxin, Song Chengwen, Wang Tonghua
College of Environmental Science and Engineering, Dalian Maritime University, 1, Linghai Road, Dalian 116026, China.
School of Chemical Engineering, Dalian University of Technology, 2, Linggong Road, Dalian 116024, China.
J Colloid Interface Sci. 2023 Jun 15;640:588-599. doi: 10.1016/j.jcis.2023.02.135. Epub 2023 Mar 2.
Decorating active catalysts on the reactive electrochemical membrane (REM) is an effective way to further improve its decontamination performance. In this work, a novel carbon electrochemical membrane (FCM-30) was prepared through coating FeOOH nano catalyst on a low-cost coal-based carbon membrane (CM) through facile and green electrochemical deposition. Structural characterizations demonstrated that the FeOOH catalyst was successfully coated on CM, and it grew into a flower cluster-like morphology with abundant active sites when the deposition time was 30 min. The nano FeOOH flower clusters can obviously boost the hydrophilicity and electrochemical performance of FCM-30, which enhance its permeability and bisphenol A (BPA) removal efficiency during the electrochemical treatment. Effects of applied voltages, flow rates, electrolyte concentrations and water matrixes on BPA removal efficiency were investigated systematically. Under the operation condition of 2.0 V applied voltage and 2.0 mL·min flow rate, FCM-30 can achieve the high removal efficiency of 93.24% and 82.71% for BPA and chemical oxygen demand (COD) (71.01% and 54.89% for CM), respectively, with only a low energy consumption (EC) of 0.41 kWh·kgCOD, which can be ascribed to the enhancement on OH yield and direct oxidation ability by the FeOOH catalyst. Moreover, this treatment system also exhibits good reusability and can be adopted on different water background as well as different pollutants.
在反应性电化学膜（REM）上负载活性催化剂是进一步提高其去污性能的有效方法。在本工作中，通过简便绿色的电化学沉积法，将FeOOH纳米催化剂负载在低成本的煤基碳膜（CM）上，制备了一种新型碳电化学膜（FCM-30）。结构表征表明，FeOOH催化剂成功负载在CM上，当沉积时间为30分钟时，其生长为具有丰富活性位点的花簇状形态。纳米FeOOH花簇可显著提高FCM-30的亲水性和电化学性能，从而增强其在电化学处理过程中的渗透性和双酚A（BPA）去除效率。系统研究了施加电压、流速、电解质浓度和水基质对BPA去除效率的影响。在施加电压2.0 V、流速2.0 mL·min的操作条件下，FCM-30对BPA和化学需氧量（COD）的去除效率分别高达93.24%和82.71%（CM分别为71.01%和54.89%），且能耗仅为0.41 kWh·kgCOD，这归因于FeOOH催化剂对OH产率和直接氧化能力的增强。此外，该处理系统还具有良好的可重复使用性，可应用于不同水质背景及不同污染物的处理。
