InOpSys - Mobiele Waterzuivering voor Chemie en Farma, Zandvoortstraat 12a, 2800, Mechelen, Belgium; KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, Sint-Katelijne-Waver, Belgium.
Agilent Technologies, R&D and Marketing GmbH & Co. KG, Waldbronn, Germany.
Chemosphere. 2023 Apr;319:137984. doi: 10.1016/j.chemosphere.2023.137984. Epub 2023 Jan 28.
A double chamber electrochemical system is developed consisting of a boron-doped diamond (BDD) anode and a graphite cathode, which not only degrades sulfamethoxazole (SMX) but also simultaneously generates hydrogen peroxide (HO). The degradation of SMX is carried out by (in)direct oxidation at the BDD anode and HO is produced by two electron oxygen (O) reduction reaction (ORR) at the cathode. The effect of different parameters on the kinetics of both mechanisms was investigated. The performance of the system at the optimized conditions (pH 3, 0.05 M NaSO as electrolyte, and 10 mA as applied current) showed that after 180 min of electrolysis, SMX was almost fully degraded (95% removal and ∼90% COD reduction) as well as about 535 μM HO was accumulated. With the help of LC-MS, five intermediates formed during SMX electrolysis were properly identified and a degradation pathway was proposed. This study advocates methods for improving the effectiveness of energy use in advanced wastewater treatment.
开发了一种由掺硼金刚石（BDD）阳极和石墨阴极组成的双室电化学系统，该系统不仅可以降解磺胺甲恶唑（SMX），还可以同时生成过氧化氢（HO）。BDD 阳极通过（间接）氧化作用来降解 SMX，阴极则通过两个电子氧（O）还原反应（ORR）来生成 HO。研究了不同参数对这两种机制动力学的影响。在优化条件（pH 3，0.05 M NaSO 作为电解质，施加电流为 10 mA）下，该系统的性能表明，经过 180 分钟的电解，SMX 几乎完全降解（去除率为 95%，COD 降低率约为 90%），同时积累了约 535 μM 的 HO。借助 LC-MS，适当鉴定了 SMX 电解过程中形成的五种中间产物，并提出了一种降解途径。本研究提倡在高级废水处理中提高能源利用效率的方法。
