Smart solar water treatment: Sensor-informed control of solar TiO₂ photocatalysis for sustainable environmental water treatment
Year: 2026
Type: article
Abstract: This study presents a solar-driven photocatalytic treatment system for decentralised water remediation evaluated under real outdoor conditions . A TiO₂-based photocatalyst operated in a 5 L compound parabolic collector (CPC) reactor was assessed using a combination of field Analytical modelation and irradiance–performance analysis. Real-time global horizontal irradiance (260–910 W m⁻²) showed a strong linear relationship with apparent degradation kinetics (R² = 0.84–0.88), demonstrating that photocatalytic activity was primarily governed by photon availability under natural sunlight . Under peak solar conditions, removals of 92 ± 4% atrazine, 86 ± 6% imidacloprid, and 79 ± 5% sulfamethoxazole were achieved within 60 minutes. To examine operational optimisation, treatment performance was analysed against concurrent irradiance data to identify efficient operating windows. Based on this relationship, an irradiance-gated operational strategy was estimated to increase daily pollutant throughput by approximately 32% compared with fixed-schedule operation . Analytical models using natural river water showed a 20–35% decrease in removal efficiency, attributed to increased turbidity and dissolved organic matter that attenuate light penetration and compete for reactive species . Overall, the results demonstrate the feasibility of solar CPC photocatalysis for decentralised treatment of agricultural runoff and highlight the importance of irradiance-responsive operation for improving process efficiency under variable sunlight.
Source: Sustainable Chemistry One World
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $1,500
OpenAlex ID: W7138965113