School of Environmental Science and Engineering, Shandong University, Qingdao, People's Republic of China.
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Qingdao, People's Republic of China.
Environ Technol. 2022 Jun;43(15):2380-2390. doi: 10.1080/09593330.2021.1880488. Epub 2021 Feb 3.
Degradation of neonicotinoid insecticide dinotefuran (DIN) in dielectric barrier discharge (DBD) non-thermal plasma combined with lanthanum-doped titanium dioxide (La-TiO) system was investigated. A La-TiO catalyst was prepared by the sol-gel method and characterized by SEM, XRD, and DRS. The effects of various factors (initial concentration, initial pH, input power, and addition of metal ions) on the removal rate of DIN were evaluated. The results indicated that when the initial concentration, input power, initial pH, and Fe catalyst ions were 100 mg/L, 150 W, 10.5 and 50 mg/L, respectively, the DIN degradation efficiency was improved to 99.0% by coupling 10 wt% La-TiO at 180 min. La-TiO showed excellent catalytic performance on DIN degradation in a DBD system. The removal rate decreased with the presence of HO and a scavenger, manifesting that plays an imperative role in the degradation process. Furthermore, intermediate products were analyzed by MS and the possible degradation pathway of DIN was proposed.
研究了在介质阻挡放电（DBD）非热等离子体中与镧掺杂二氧化钛（La-TiO）系统结合降解新烟碱类杀虫剂噻虫嗪（DIN）。采用溶胶-凝胶法制备了 La-TiO 催化剂，并通过 SEM、XRD 和 DRS 进行了表征。考察了不同因素（初始浓度、初始 pH 值、输入功率和金属离子添加）对 DIN 去除率的影响。结果表明，当初始浓度、输入功率、初始 pH 值和 Fe 催化剂离子分别为 100mg/L、150W、10.5 和 50mg/L 时，在 180min 内通过耦合 10wt%La-TiO 可将 DIN 降解效率提高到 99.0%。La-TiO 在 DBD 体系中对 DIN 降解表现出优异的催化性能。去除率随 HO 和清除剂的存在而降低，表明在降解过程中起重要作用。此外，通过 MS 分析了中间产物，并提出了 DIN 的可能降解途径。
