Investigation of the adsorption kinetic of Cd(II) from aqueous solution using biochar derived from sugarcane bagasse

Tu  Nguyen; Tin Le; Ngoc Duong; Tu Le; Tuyen Pham; Phuc Dinh

doi:10.62239/jca.2026.049

Authors

Nguyen Thi Phuong Tu Nguyen Tat Thanh University
Le Nguyen Trung Tin Nguyen Tat Thanh University
Duong Bich Ngoc Nguyen Tat Thanh University
Le Nguyen Quang Tu Nguyen Tat Thanh University
Pham Nguyen Kim Tuyen Saigon University
Dinh Van Phuc Nguyen Tat Thanh University

DOI:

https://doi.org/10.62239/jca.2026.049

Keywords:

Biochar, biosorption, Cd(II) complexes, adsorption kinetic, sugarcane bagasse

Abstract

In this report, adsorption kinetics of Cd(II) onto biochar derived from sugarcane bagasse from an aqueous solution were investigated using 3 kinetic models: pseudo-first-order, pseudo-second-order, and intraparticle diffusion. The obtained results show that the uptake of Cd(II) using biochar derived from sugarcane bagasse occurs in 4 stages: (i) bulk diffusion; (ii) surface process; (iii) intraparticle diffusion; and (iv): surface interaction. By comparing RMSE, c² and R² values calculated via the least squares method and the Solver Add-in function in Excel software, the pseudo-second-order model gave the best fit with the experimental data with RMSE = 0.3877, c² = 0.2790 and R² = 0.9918. This study is useful in determining the possible pathways and mechanisms during the adsorption process.

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