Qamar, S., Khawaja, A. S., Umer, A., Ramzan, N., & Ullah, N. (2022). Equilibrium and kinetic studies on the removal of Cu(II) from aqueous solution using acid treated modified rice husk: A Comparative Study. Journal of the Pakistan Institute of Chemical Engineers, 48(1), 27–34. https://doi.org/10.54693/piche.04813 (Original work published November 16, 2020)