Current use of low-pressure mercury UV-lamps for oxidation processes is mostly based on one wavelength. An inefficient one with that. By combining another major absorption line (185 nm) UV-based advanced oxidation processes could prove to be a viable alternative to in-place methods – and that with little energy and chemical cost.
Though to get there is proven challenging due to the different effective reaches of both wavelengths. Wetsus researchers have shown that this is possible in this new publication. Introducing a new figure of useful absorbed energy and confirmation with experimental data, they contribute to smart engineering of these complex UV-oxidation processes.
George, N. Kovoor, B. A. Wols, D. Santoro, M. Borboudakis, K. Bell, and W. Gernjak. 2022. “A Novel Approach to Interpret Quasi-Collimated Beam Results to Support Design and Scale-up of Vacuum UV Based AOPs.” Water Research X, no. 100158: 100158. https://doi.org/10.1016/j.wroa.2022.100158.