Dinh, Thuy-Linh, Thi-Hien Nguyen, Van-Thuan Nguyen, and Thuy-Tien Do. 2026. “Removal of Cr(VI) from Aqueous Solutions Using MnFe₂O₄–Coffee Husk Activated Carbon Composite”. HPU2 Journal of Science: Natural Sciences and Technology 5 (01):35-44. https://doi.org/10.56764/hpu2.jos.2026.5.01.35-44.