Mechanism study of a novel modified mesoporous silicon-based NiT₅₀/MCM-41 adsorbent for the selective adsorption of methylene blue from water.

ABSTRACT: In this study, a new silica-based adsorbent strategy was developed to achieve a high adsorption capacity and high MB adsorption selectivity by impregnating a cationic [Ni(tepa)]²⁺ complex on a negatively charged silicon carrier, MCM-41. When the [Ni(tepa)]²⁺ loading was 50%, the MB adsorption capacity of the silicon-based adsorbent (NiT₅₀/MCM-41) could reach 130 mg g^-1, which was much higher than that of the original silicon-based MCM-41 adsorbent (23 mg g^-1). Interestingly, NiT₅₀/MCM-41 exhibited excellent MB adsorption selectivity in binary mixed dye solutions (MB/R6G, MB/RhB, and MB/MO). The adsorption kinetics and adsorption isotherm followed a second-order kinetic model and the Langmuir adsorption model, respectively. E

SUBMITTER: Luo B 

PROVIDER: S-EPMC11840672 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature