Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamine
one of the most important issues in water resources today is pollution caused by heavy metals. Nickel is a heavy metal that is widely used in various industries. Nickel is one of the most important pollutants in the environment and its removal is very important. There are different methods for separ...
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OICC Press
2021-08-01
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| Series: | Anthropogenic Pollution |
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| Online Access: | http://oiccpress.com/ap/article/view/3458 |
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| author | Nazanin Parsa Hassan Rezaei |
| author_facet | Nazanin Parsa Hassan Rezaei |
| author_sort | Nazanin Parsa |
| collection | DOAJ |
| description | one of the most important issues in water resources today is pollution caused by heavy metals. Nickel is a heavy metal that is widely used in various industries. Nickel is one of the most important pollutants in the environment and its removal is very important. There are different methods for separating heavy metals from aqueous media. Among all methods, surface adsorption is a low-cost and simple method and for removing heavy metals in low and medium concentrations. The aim of this study was to investigate the adsorption efficiency of nickel ions from aqueous solutions using melamine modified nano-graphene oxide.The experiments were performed under discontinuous conditions and the five parameters of initial concentration, contact time, temperature, pH and adsorbent dose were optimized. The pseudo-first-order and psedo-second-order kinetic models were investigated. Finally, thermodynamic parameters such as enthalpy and entropy change and Gibbs free energy were calculated.In the kinetic study, by comparing the coefficient of explanation of the pseudo-first-order model (0.3084) and the pseudo -second-order model (0.997), it was found that pseudo -second-order model better shows the adsorption process of nickel by the adsorbent. oxide nanoparticles is spontaneous and the reaction is accompanied by an increase in irregularity and endotherm. The adsorbent surface is multilayered, non-uniform and the adsorbent material on the adsorbent is heterogeneous. Nano graphene oxide modified by melamine has a special surface and high potential and is a suitable adsorbent for removing nickel from aqueous solutions and has a high absorption. |
| format | Article |
| id | doaj-art-182127bd16e34107af3cf1550f28c7d9 |
| institution | Kabale University |
| issn | 2783-1736 2588-4646 |
| language | English |
| publishDate | 2021-08-01 |
| publisher | OICC Press |
| record_format | Article |
| series | Anthropogenic Pollution |
| spelling | doaj-art-182127bd16e34107af3cf1550f28c7d92024-11-23T11:15:17ZengOICC PressAnthropogenic Pollution2783-17362588-46462021-08-015210.22034/ap.2021.1929112.1104Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamineNazanin Parsa0Hassan Rezaei1Department of Environmental Pollution, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, IranDepartment of Environmental Pollution, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iranone of the most important issues in water resources today is pollution caused by heavy metals. Nickel is a heavy metal that is widely used in various industries. Nickel is one of the most important pollutants in the environment and its removal is very important. There are different methods for separating heavy metals from aqueous media. Among all methods, surface adsorption is a low-cost and simple method and for removing heavy metals in low and medium concentrations. The aim of this study was to investigate the adsorption efficiency of nickel ions from aqueous solutions using melamine modified nano-graphene oxide.The experiments were performed under discontinuous conditions and the five parameters of initial concentration, contact time, temperature, pH and adsorbent dose were optimized. The pseudo-first-order and psedo-second-order kinetic models were investigated. Finally, thermodynamic parameters such as enthalpy and entropy change and Gibbs free energy were calculated.In the kinetic study, by comparing the coefficient of explanation of the pseudo-first-order model (0.3084) and the pseudo -second-order model (0.997), it was found that pseudo -second-order model better shows the adsorption process of nickel by the adsorbent. oxide nanoparticles is spontaneous and the reaction is accompanied by an increase in irregularity and endotherm. The adsorbent surface is multilayered, non-uniform and the adsorbent material on the adsorbent is heterogeneous. Nano graphene oxide modified by melamine has a special surface and high potential and is a suitable adsorbent for removing nickel from aqueous solutions and has a high absorption.http://oiccpress.com/ap/article/view/3458IsothermsKineticsNano graphene oxideNickel |
| spellingShingle | Nazanin Parsa Hassan Rezaei Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamine Anthropogenic Pollution Isotherms Kinetics Nano graphene oxide Nickel |
| title | Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamine |
| title_full | Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamine |
| title_fullStr | Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamine |
| title_full_unstemmed | Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamine |
| title_short | Study of kinetics, and thermodynamics of nikel adsorption from aqueous solutions using modified nano-graphene oxide by melamine |
| title_sort | study of kinetics and thermodynamics of nikel adsorption from aqueous solutions using modified nano graphene oxide by melamine |
| topic | Isotherms Kinetics Nano graphene oxide Nickel |
| url | http://oiccpress.com/ap/article/view/3458 |
| work_keys_str_mv | AT nazaninparsa studyofkineticsandthermodynamicsofnikeladsorptionfromaqueoussolutionsusingmodifiednanographeneoxidebymelamine AT hassanrezaei studyofkineticsandthermodynamicsofnikeladsorptionfromaqueoussolutionsusingmodifiednanographeneoxidebymelamine |