A Comparative Analysis of Zn2+ Adsorption from Simulated Mining Wastewater Using Unmodified and NaClO-Modified Sugarcane Bagasse-Derived Biochar
Year: 2025
Type: article
Abstract: This study evaluated the adsorption of Zn2+ from simulated mining wastewater using unmodified sugarcane bagasse-derived biochar (U-SCBB) and NaClO-modified sugarcane bagasse-derived biochar (SH-SCBB). The effectiveness of NaClO modification in enhancing the biochar's adsorption capacity was a key focus of this research. Results indicated that both U-SCBB and SH-SCBB exhibited significant Zn2+adsorption capabilities, with SH-SCBB showing superior performance. Specifically, SH-SCBB achieved the highest Zn2+removal efficiency at pH 5 and adsorbent dosage of 0.9 g. Adsorption behavior and maximum Zn2+ removal were modeled using various isotherms, including Langmuir, Freundlich, Dubinin-Radushkevich (D-R), Flory-Huggins (F-H), and Temkin. It was determined that the SH-SCBB was best described by the D-R isotherm with a coefficient of determination or R2 equivalent to 0.96. Kinetic data were analyzed with Pseudo-First Order (PFO), Pseudo-Second Order (PSO), Elovich, and Intra-Particle Diffusion (IPD) models, and it was found to pattern out a PSO model with an R2 of 0.99, suggesting a physisorption process with an equilibrium time of 75 minutes. Optimal adsorption considering statistical significance was at pH 5 with 0.7 g of SH-SCBB, underscoring its potential as a cost-effective and environmentally sustainable adsorbent for Zn2+removal in mining wastewater treatment.
Source: Key engineering materials
DOI: 10.4028/p-q9yc01
Authors: Tristan Roy L. Panaligan, Jesuniño R. Aquino, Airamaebel Almario, Joshua Daniele Francia, Irish Anne Mendoza
Institution: Malayan Colleges Laguna
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4411373540