P. Rath, B. Priyadarshini, S. S. Behera, P. Parhi, S. R. Panda, T. Sahoo
{"title":"用TiO2纳米颗粒吸附去除刚果红染料:动力学，热力学和等温观察","authors":"P. Rath, B. Priyadarshini, S. S. Behera, P. Parhi, S. R. Panda, T. Sahoo","doi":"10.1063/1.5112954","DOIUrl":null,"url":null,"abstract":"TiO2 nanoparticles have been synthesized by co-precipitation method and is used as an adsorbent for removal of toxic Congo Red (CR) dye. The resulting adsorbent TiO2 was characterized by X-ray powder diffraction pattern, confirming the rutile phase of TiO2 nanoparticle. Adsorption equilibrium data were evaluated by Langmuir isotherm and Freundlich adsorption isotherm. The kinetic data were analyzed using pseudo-first order, pseudo-second order and intraparticle diffusion equations. Kinetics result revealed that the adsorption of CR is of pseudo second-order and chemisorption type. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated and the positive value of ΔH° (2.64 kJmol−1) corresponds to an endothermic nature of the adsorption process and the positive value of ΔS° (0.162 Jmol−1 K−1) reveals the increased randomness of the dye during adsorption process.TiO2 nanoparticles have been synthesized by co-precipitation method and is used as an adsorbent for removal of toxic Congo Red (CR) dye. The resulting adsorbent TiO2 was characterized by X-ray powder diffraction pattern, confirming the rutile phase of TiO2 nanoparticle. Adsorption equilibrium data were evaluated by Langmuir isotherm and Freundlich adsorption isotherm. The kinetic data were analyzed using pseudo-first order, pseudo-second order and intraparticle diffusion equations. Kinetics result revealed that the adsorption of CR is of pseudo second-order and chemisorption type. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated and the positive value of ΔH° (2.64 kJmol−1) corresponds to an endothermic nature of the adsorption process and the positive value of ΔS° (0.162 Jmol−1 K−1) reveals the increased randomness of the dye during adsorption process.","PeriodicalId":10874,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2018","volume":"40 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2019-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":"{\"title\":\"Adsorptive removal of Congo Red dye from aqueous solution using TiO2 nanoparticles: Kinetics, thermodynamics and isothermal insights\",\"authors\":\"P. Rath, B. Priyadarshini, S. S. Behera, P. Parhi, S. R. Panda, T. Sahoo\",\"doi\":\"10.1063/1.5112954\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"TiO2 nanoparticles have been synthesized by co-precipitation method and is used as an adsorbent for removal of toxic Congo Red (CR) dye. The resulting adsorbent TiO2 was characterized by X-ray powder diffraction pattern, confirming the rutile phase of TiO2 nanoparticle. Adsorption equilibrium data were evaluated by Langmuir isotherm and Freundlich adsorption isotherm. The kinetic data were analyzed using pseudo-first order, pseudo-second order and intraparticle diffusion equations. Kinetics result revealed that the adsorption of CR is of pseudo second-order and chemisorption type. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated and the positive value of ΔH° (2.64 kJmol−1) corresponds to an endothermic nature of the adsorption process and the positive value of ΔS° (0.162 Jmol−1 K−1) reveals the increased randomness of the dye during adsorption process.TiO2 nanoparticles have been synthesized by co-precipitation method and is used as an adsorbent for removal of toxic Congo Red (CR) dye. The resulting adsorbent TiO2 was characterized by X-ray powder diffraction pattern, confirming the rutile phase of TiO2 nanoparticle. Adsorption equilibrium data were evaluated by Langmuir isotherm and Freundlich adsorption isotherm. The kinetic data were analyzed using pseudo-first order, pseudo-second order and intraparticle diffusion equations. Kinetics result revealed that the adsorption of CR is of pseudo second-order and chemisorption type. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated and the positive value of ΔH° (2.64 kJmol−1) corresponds to an endothermic nature of the adsorption process and the positive value of ΔS° (0.162 Jmol−1 K−1) reveals the increased randomness of the dye during adsorption process.\",\"PeriodicalId\":10874,\"journal\":{\"name\":\"DAE SOLID STATE PHYSICS SYMPOSIUM 2018\",\"volume\":\"40 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-07-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"10\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"DAE SOLID STATE PHYSICS SYMPOSIUM 2018\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1063/1.5112954\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"DAE SOLID STATE PHYSICS SYMPOSIUM 2018","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1063/1.5112954","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Adsorptive removal of Congo Red dye from aqueous solution using TiO2 nanoparticles: Kinetics, thermodynamics and isothermal insights
TiO2 nanoparticles have been synthesized by co-precipitation method and is used as an adsorbent for removal of toxic Congo Red (CR) dye. The resulting adsorbent TiO2 was characterized by X-ray powder diffraction pattern, confirming the rutile phase of TiO2 nanoparticle. Adsorption equilibrium data were evaluated by Langmuir isotherm and Freundlich adsorption isotherm. The kinetic data were analyzed using pseudo-first order, pseudo-second order and intraparticle diffusion equations. Kinetics result revealed that the adsorption of CR is of pseudo second-order and chemisorption type. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated and the positive value of ΔH° (2.64 kJmol−1) corresponds to an endothermic nature of the adsorption process and the positive value of ΔS° (0.162 Jmol−1 K−1) reveals the increased randomness of the dye during adsorption process.TiO2 nanoparticles have been synthesized by co-precipitation method and is used as an adsorbent for removal of toxic Congo Red (CR) dye. The resulting adsorbent TiO2 was characterized by X-ray powder diffraction pattern, confirming the rutile phase of TiO2 nanoparticle. Adsorption equilibrium data were evaluated by Langmuir isotherm and Freundlich adsorption isotherm. The kinetic data were analyzed using pseudo-first order, pseudo-second order and intraparticle diffusion equations. Kinetics result revealed that the adsorption of CR is of pseudo second-order and chemisorption type. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated and the positive value of ΔH° (2.64 kJmol−1) corresponds to an endothermic nature of the adsorption process and the positive value of ΔS° (0.162 Jmol−1 K−1) reveals the increased randomness of the dye during adsorption process.
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