“…Nowadays, the main treatment methods of uranium-bearing radioactive wastewater include extraction, 11 membrane filtration, 12,13 adsorption, 14–17 biological treatment, 18–22 chemical precipitation, 23 and chemical reduction. 24–26 Among them, photoreduction of soluble U( vi ) to insoluble uranium (U( iv )) is considered the most environmentally friendly and energy-saving technology to achieve U( vi ) extraction.…”