Ultraviolet (UV) irradiation is a common disinfection option for water treatment in the developed world. There are a few systems installed in developing countries for point-of-use treatment, but the low-pressure mercury lamps currently used as the UV irradiation source have a number of sustainability issues including a fragile envelope, a lifetime of approximately one year, and they contain mer...

This work analyses how to optimise efficiency in the use of solar light for different UV-based photochemical water treatment processes. The direct sunlight state-of-the-art compound parabolic collector (CPC) photoreactors is compared with energy electricity generation photovoltaic (PV) power systems feed LED lighting sources. Seven processes (CPC, PV-UVA LED, PV-UVC CPC+TiO2, CPC+H2O2, LED+TiO2...

In this study, cellulose nanocrystals (CNC) was prepared and meso-tetrakis(4-nitrophenyl)porphyrin (TNPP) was immobilized on it. The product was identified by techniques of UV-Vis, fourier transform infrared (FT-IR), diffuse reflectance UV-Vis spectroscopy (DRS), energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM). The effect of an amount of a loaded porphyrin comp...

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the etiologic agent of COVID-19, which has affected international healthcare systems since beginning 2020. Among sanitizing approaches, UV irradiation a well-known technology often used in different environments to reduce microbial contamination and viral transmission. In particular, several works have demonstrated that UVC radiati...