Hong Huyen, Chu Thi, Nguyen Thi Hong, and Nguyen Thu Huyen. 2026. “Study On Factors Affecting the Adsorption Performance of Municipal Solid Waste-Derived Biochar for Pb²⁺ And Cr⁶⁺ Removal from Aqueous Solutions”. Engineering And Technology Journal 11 (06):10768-673. https://doi.org/10.47191/etj/v11i06.52.