Burak Can Güney, Ahmetcan Dikyar, Muradiye Şahin, Yasin Arslan
{"title":"金属（Ag, Cu）和双金属（Ag/Cu）纳米颗粒对甲基橙和亚甲基蓝的去除：吸附等温线和动力学","authors":"Burak Can Güney, Ahmetcan Dikyar, Muradiye Şahin, Yasin Arslan","doi":"10.1007/s11144-025-02874-4","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, the adsorption of Methylene Blue (MB) and Methyl Orange (MO) dyes from aqueous solutions onto both metallic Ag NPs and Cu NPs and bimetallic Ag/Cu NPs obtained from the extract of Helichrysum arenarium, an aromatic plant, by green synthesis method was investigated and equilibrium isotherms and kinetic models were determined. The adsorption parameters, such as pH, adsorbent amount, contact time and initial concentration were optimized. The most successful removal for MO was achieved with Ag/Cu NPs at 76.9% under optimum conditions (20 mg/L MO, 20 mg Ag/Cu NPs, 60 min contact time, pH 2), while that for MB was achieved with Ag NPs at 82.7% under optimum conditions (20 mg/L MB, 20 mg Ag NPs, 60 min contact time, pH 4). Moreover, the adsorption data were modelled by Langmuir and Freundlich adsorption isotherms and Langmuir adsorption was found to be the most appropriate adsorption isotherm model for both MB and MO. Furthermore, while the pseudo-first-order reaction kinetic model was found to be the most suitable for MO dye, the pseudo-second-order reaction kinetic model was found to be the most suitable for MB dye. Based on the experimental results, bimetallic Ag/Cu NPs can be considered as effective, economic, and alternative adsorbent based on the maximum adsorption capacities which were found to be 191.696 mg/g for MO and 374.001 mg/g for MB. The highest efficiency of bimetallic Ag/Cu NPs is due to the properties of both Ag NPs and Cu NPs.</p><h3>Graphical abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 5","pages":"3159 - 3179"},"PeriodicalIF":1.7000,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Removal of methyl orange and methylene blue by both metallic (Ag, Cu) and bimetallic (Ag/Cu) nanoparticles: adsorption isotherms and kinetics\",\"authors\":\"Burak Can Güney, Ahmetcan Dikyar, Muradiye Şahin, Yasin Arslan\",\"doi\":\"10.1007/s11144-025-02874-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, the adsorption of Methylene Blue (MB) and Methyl Orange (MO) dyes from aqueous solutions onto both metallic Ag NPs and Cu NPs and bimetallic Ag/Cu NPs obtained from the extract of Helichrysum arenarium, an aromatic plant, by green synthesis method was investigated and equilibrium isotherms and kinetic models were determined. The adsorption parameters, such as pH, adsorbent amount, contact time and initial concentration were optimized. The most successful removal for MO was achieved with Ag/Cu NPs at 76.9% under optimum conditions (20 mg/L MO, 20 mg Ag/Cu NPs, 60 min contact time, pH 2), while that for MB was achieved with Ag NPs at 82.7% under optimum conditions (20 mg/L MB, 20 mg Ag NPs, 60 min contact time, pH 4). Moreover, the adsorption data were modelled by Langmuir and Freundlich adsorption isotherms and Langmuir adsorption was found to be the most appropriate adsorption isotherm model for both MB and MO. Furthermore, while the pseudo-first-order reaction kinetic model was found to be the most suitable for MO dye, the pseudo-second-order reaction kinetic model was found to be the most suitable for MB dye. Based on the experimental results, bimetallic Ag/Cu NPs can be considered as effective, economic, and alternative adsorbent based on the maximum adsorption capacities which were found to be 191.696 mg/g for MO and 374.001 mg/g for MB. 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Removal of methyl orange and methylene blue by both metallic (Ag, Cu) and bimetallic (Ag/Cu) nanoparticles: adsorption isotherms and kinetics
In this study, the adsorption of Methylene Blue (MB) and Methyl Orange (MO) dyes from aqueous solutions onto both metallic Ag NPs and Cu NPs and bimetallic Ag/Cu NPs obtained from the extract of Helichrysum arenarium, an aromatic plant, by green synthesis method was investigated and equilibrium isotherms and kinetic models were determined. The adsorption parameters, such as pH, adsorbent amount, contact time and initial concentration were optimized. The most successful removal for MO was achieved with Ag/Cu NPs at 76.9% under optimum conditions (20 mg/L MO, 20 mg Ag/Cu NPs, 60 min contact time, pH 2), while that for MB was achieved with Ag NPs at 82.7% under optimum conditions (20 mg/L MB, 20 mg Ag NPs, 60 min contact time, pH 4). Moreover, the adsorption data were modelled by Langmuir and Freundlich adsorption isotherms and Langmuir adsorption was found to be the most appropriate adsorption isotherm model for both MB and MO. Furthermore, while the pseudo-first-order reaction kinetic model was found to be the most suitable for MO dye, the pseudo-second-order reaction kinetic model was found to be the most suitable for MB dye. Based on the experimental results, bimetallic Ag/Cu NPs can be considered as effective, economic, and alternative adsorbent based on the maximum adsorption capacities which were found to be 191.696 mg/g for MO and 374.001 mg/g for MB. The highest efficiency of bimetallic Ag/Cu NPs is due to the properties of both Ag NPs and Cu NPs.
期刊介绍：
Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields:
-kinetics of homogeneous reactions in gas, liquid and solid phase;
-Homogeneous catalysis;
-Heterogeneous catalysis;
-Adsorption in heterogeneous catalysis;
-Transport processes related to reaction kinetics and catalysis;
-Preparation and study of catalysts;
-Reactors and apparatus.
Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.
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