Green-engineered CSPVA@CuO–Ag hybrid nanocomposite for methylene blue removal: a comprehensive adsorption study - S. K. Lakkaboyana; A. Muhammad; E. A. Abdelrahman; K. Neeli; P. Venkateswarlu; R. M. N. Kalla; A. G. Alhamzani (International Journal of Environmental Science and Technology, 2026)