School of Environmental and Civil Engineering, Dongguan University of Technology, Dongguan, People's Republic of China.
Environmental Science and Engineering Center, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen, People's Republic of China.
Environ Technol. 2021 Nov;42(27):4317-4323. doi: 10.1080/09593330.2020.1756421. Epub 2020 May 4.
In the present study, the HS photolysis using the self-made high-frequency discharge electrodeless lamp (light distribution was 90% at 254 nm and 10% at 185 nm) was studied and simulated by MATLAB software. Firstly, the effects of the initial HS concentration, irradiation time, oxygen content and relative humidity on HS photolysis efficiency were experimentally investigated. The results indicated that the photolysis efficiency decreased from 100% to 90.13% with the increase in the initial concentration from 3 to 30 mg/m, and the main product was HSO. With the relative humidity increased from 0% to 99%, HS photolysis efficiency was obviously improved under different atmospheres (O> air > Ar), indicating the significant effect of relative humidity and oxygen concentration. The simulation results were consistent with the experimental results, indicating the feasibility of the simulation model. Moreover, based on the photoreactions, model simulation and equilibrium analysis of sulphur species, the photodegradation pathway of HS was further inferred. HS was oxidized to HSO by O and other strong oxidizing radicals excited by 185 nm UV light.
在本研究中，使用自制的高频放电无电极灯（254nm 处的光分布为 90%，185nm 处的光分布为 10%）对 HS 的光解进行了研究和模拟。首先，通过实验考察了初始 HS 浓度、辐照时间、氧含量和相对湿度对 HS 光解效率的影响。结果表明，随着初始浓度从 3 到 30mg/m3的增加，光解效率从 100%降低到 90.13%，主要产物为 HSO。在不同气氛（O>空气>Ar）下，随着相对湿度从 0%增加到 99%，HS 光解效率明显提高，表明相对湿度和氧浓度的显著影响。模拟结果与实验结果一致，表明模拟模型的可行性。此外，基于光反应、硫物种的模型模拟和平衡分析，进一步推断了 HS 的光降解途径。185nmUV 光激发的 O 和其他强氧化剂将 HS 氧化为 HSO。
