College of Environment, Zhejiang University of Technology, Hangzhou 310009, China.
College of Environment, Zhejiang University of Technology, Hangzhou 310009, China.
Sci Total Environ. 2019 Nov 20;692:940-951. doi: 10.1016/j.scitotenv.2019.07.318. Epub 2019 Jul 20.
A novel array double dielectric barrier discharge (ADDBD) combined with a TiO/AlO-CoO/AC (TiCo) catalyst was applied to remove toluene. The effects of catalyst setting distance, catalyst combination mode, and process factors (including specific input energy, initial toluene concentration, and relative humidity) were investigated in terms of the toluene degradation efficiency (η) and the selectivity of CO (S). When the specific input energy was 65 J·L, the initial toluene concentration was 100 mg·m, and the relative humidity was 30%, the highest η of 72% and S of 44% could be achieved with TiO/AlO 10 cm and CoO/AC 20 cm downstream of the ADDBD. Based on the determination of active substances (e.g., O, OH) and the catalyst activation mode, a synergistic effect of active substances and photon between the ADDBD and the TiCo catalyst was proposed for the removal of toluene. Finally, the biodegradability and toxicity of the outlet gas were evaluated, and the results showed that the outlet gas was more convenient for subsequent biopurification and less toxic to the surroundings after the treatment by the ADDBD combined with the TiCo catalyst.
一种新型的阵列式双介质阻挡放电（ADDBD）与 TiO/AlO-CoO/AC（TiCo）催化剂相结合，用于去除甲苯。考察了催化剂设置距离、催化剂组合方式以及工艺因素（包括特定输入能量、初始甲苯浓度和相对湿度）对甲苯降解效率（η）和 CO 选择性（S）的影响。当特定输入能量为 65 J·L、初始甲苯浓度为 100 mg·m 和相对湿度为 30%时，在 ADDBD 下游设置 TiO/AlO 10 cm 和 CoO/AC 20 cm 时，可获得最高的 72%η和 44%S。基于活性物质（如 O、OH）的测定和催化剂的激活模式，提出了 ADDBD 和 TiCo 催化剂之间活性物质和光子的协同作用，用于去除甲苯。最后，评价了出口气体的可生物降解性和毒性，结果表明，经过 ADDBD 与 TiCo 催化剂联合处理后，出口气体更便于后续的生物净化，对周围环境的毒性更小。
