Guo Lun, Williams David E, Bromberg Lev, Padhye Lokesh P
Department of Civil & Environmental Engineering, The University of Auckland Auckland 1142 New Zealand.
School of Chemical Sciences, University of Auckland Bldg. 302, 23 Symonds St Auckland 1010 New Zealand.
RSC Adv. 2025 Apr 4;15(14):10501-10510. doi: 10.1039/d5ra01013f.
This study demonstrates the effective electrochemical degradation of bromate, achieving over 95% removal, using both sheet electrodes and reactive membranes fabricated from Magnéli phase titanium oxide (Ti O, = 4-10). Increasing the applied voltage and electrolyte concentration, as well as decreasing the pH, significantly enhanced bromate reduction efficiency. Experimental results suggest that both direct and indirect pathways contribute to the overall degradation process. The impact of coexisting ions was also evaluated. At 1 mM, their inhibitory effect was negligible, whereas, at 10 mM, the inhibition became pronounced in the order SO > CO > Cl ≈ NO ≈ NO > ClO . When applied to secondary effluent wastewater, this electrochemical approach achieved 70% degradation of bromate within six hours. Moreover, the Magnéli phase titanium oxide electrodes exhibited excellent stability and reusability, highlighting their potential for real-world water and wastewater treatment applications.
本研究证明了使用由马格涅利相氧化钛（Ti₄O₇，n = 4 - 10）制成的片状电极和反应膜，可实现溴酸盐的有效电化学降解，去除率超过95%。增加施加电压和电解质浓度，以及降低pH值，可显著提高溴酸盐还原效率。实验结果表明，直接和间接途径都对整体降解过程有贡献。还评估了共存离子的影响。在1 mM时，它们的抑制作用可忽略不计，而在10 mM时，抑制作用按SO₄²⁻ > CO₃²⁻ > Cl⁻ ≈ NO₃⁻ ≈ NO₂⁻ > ClO₃⁻的顺序变得明显。当应用于二级出水废水时，这种电化学方法在6小时内实现了70%的溴酸盐降解。此外，马格涅利相氧化钛电极表现出优异的稳定性和可重复使用性，突出了它们在实际水和废水处理应用中的潜力。
