Synthesis and application of AuNi@AC nano adsorbents for the removal of Maxilon Blue 5G azo dye from aquatic mediums

• Published in: Food and chemical toxicology Vol. 167; p. 113303
• Main Authors: Bayat, Ramazan, Bingül Reçber, Züleyha, Bekmezci, Muhammed, Nas, Mehmet Salih, Calimli, Mehmet Harbi, Demirbas, Ozkan, Akin, Merve, Şen, Fatih
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2022
• Subjects: Catalyst; Cationic dye; Kinetic; Physicochemical; Sorption; Sorption; Physicochemical; Cationic dye; Kinetic; Catalyst
• ISSN: 0278-6915; 1873-6351
• DOI: 10.1016/j.fct.2022.113303

In this research, gold-nicel supported on activated carbon (AC) nanoadsorbent (AuNi@AC) synthesized by following a series of physicochemical procedures was prepared for the removal of Maxilon Blue 5G (MB) which is a cationic textile dye. Experimental studies based on parameters specifically pH, contact time, nano catalytic adsorbent particle, initial MB dye concentration and temperature effect were conducted in aqueous solutions in a batch system. AuNi@AC nanoadsorbents (NAs) reached the equilibrium in 30 min under optimum conditions in adsorption of the dye. The pseudo-first, second-order, and intra-particle diffusion models were tested to evaluate a the experimental results. Adsorption kinetics were found to be represented by the pseudo-second-order model, and the maximum adsorption capacity (qmax.) was calculated to be 542.90 mg/g (or 2.041 mmol/g). The synthesized magnetic AuNi@AC nanoadsorbent showed a high-efficiency reusability effect of about 64% after five reuse runs. Also, thermodynamic function parameters such as activation energy (Ea), Gibbs free energy (ΔG *), and entropy (ΔS *) were investigated in the sorption study. After all evaluation of data, it was concluded that the novel AuNi@AC nanoadsorbent could be considered as an effective support material for the removal of various organic pollutants in aquation solution especially for the removal of MB. •Nano adsorbents reached equilibrium in 30 min under optimum conditions in adsorption of the dye.•Maximum adsorption capacity (qmax.) were obtained to be 542.90 mg/g (or 2.041 mmol/g).•Nano adsorbents showed a high-efficiency reusability effect of about 64% after five reuse runs.