School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China.
Chemosphere. 2021 Jul;274:129722. doi: 10.1016/j.chemosphere.2021.129722. Epub 2021 Jan 29.
Based on the difficulty of the refractory organic compounds degradation in water by the traditional wastewater treatment methods, the research relies on the technology of the dielectric barrier discharge plasma (DBDP) and the catalysis of the nano WO, investigating the bisphenol A (BPA) degradation in the synergistic system of DBDP/WO. The coupled degradation percentage of the BPA under different amounts of WO addition, different initial solution pH and carrier gas were investigated to confirm the catalysis of the WO in the DBDP system. It was obtained from the experimental results that the optimal additive amount of the WO was 175 mg L and change of the solution pH value and the carrier gas variety could not change the catalysis of the WO. The BPA degradation percentage could reach 100% after treating 30 min in the DBDP/WO system with 0.5 L min O as the carrier gas. The WO still had a better catalysis after four times usage and the discharge had little effect on the microstructure of the WO. The existence of the WO in the DBDP system could result in the reduction of the O concentration and the enhancement of the HO concentration, which improve the catalysis of the WO in the DBDP system, while the experiments on the scavengers' addition verified the major role of the OH on the BPA degradation. The catalytic mechanism of the WO as well as the BPA degradation pathway was also speculated in the research.
基于传统废水处理方法难以降解水中的难处理有机化合物这一现状，本研究依赖于介质阻挡放电等离子体（DBDP）技术和纳米 WO 的催化作用，研究了协同 DBDP/WO 体系中双酚 A（BPA）的降解。考察了不同 WO 添加量、不同初始溶液 pH 值和载气条件下 DBDP/WO 协同体系中 BPA 的降解情况，以确定 WO 在 DBDP 体系中的催化作用。实验结果表明，WO 的最佳添加量为 175mg/L，溶液 pH 值和载气种类的变化不能改变 WO 的催化作用。在以 0.5L/min O2 为载气的 DBDP/WO 体系中处理 30min 后，BPA 的降解率可达 100%。WO 经过四次使用后仍具有较好的催化作用，放电对 WO 的微观结构几乎没有影响。WO 存在于 DBDP 体系中会导致 O 浓度降低和 HO 浓度升高，从而提高 WO 在 DBDP 体系中的催化作用，而添加清除剂的实验验证了 OH 对 BPA 降解的主要作用。本研究还推测了 WO 的催化机制以及 BPA 的降解途径。
