The use of zeolite-based geopolymers as adsorbent for copper removal from aqueous media
Copper has been proven to have hazardous effects on human beings depending on its concentration levels. Recently, there has been a growing interest in developing geopolymers using local industrial minerals and by-products. However, research on the adsorption of heavy metals by geopolymer based on mo...
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| Format: | Article |
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The Royal Society
2022-03-01
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| Series: | Royal Society Open Science |
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| Online Access: | https://royalsocietypublishing.org/doi/10.1098/rsos.211644 |
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| author | Haci Baykara Maria de Lourdes Mendoza Solorzano Jose Javier Delgado Echeverria Mauricio H. Cornejo Clotario V. Tapia-Bastidas |
| author_facet | Haci Baykara Maria de Lourdes Mendoza Solorzano Jose Javier Delgado Echeverria Mauricio H. Cornejo Clotario V. Tapia-Bastidas |
| author_sort | Haci Baykara |
| collection | DOAJ |
| description | Copper has been proven to have hazardous effects on human beings depending on its concentration levels. Recently, there has been a growing interest in developing geopolymers using local industrial minerals and by-products. However, research on the adsorption of heavy metals by geopolymer based on mordenite-rich tuffs is still limited. The geopolymer adsorbents have been synthesized using natural Ecuadorian zeolite-rich tuffs containing quartz, mordenite calcite and amorphous content with 20.8%, 28.5%, 4.2% and 46.4%, respectively. The geopolymers showed a maximum compressive strength of 26.86 MPa for 28 d of curing time. In the present study, an Ecuadorian zeolite-based geopolymer's removal capacity on copper ions in aqueous solutions, varying concentration and contact time were tested. Kinetic models were developed using pseudo first-order, pseudo second-order and the Elovich model. The adsorption data, using Cu2+ concentrations from 20 to 160 ppm, at 25°C were described by the Langmuir and Freundlich isotherms. Linear coefficient of determination (R2) results show that the Langmuir model fits the best. The attained adsorption capacity of 52.63 mg g−1 demonstrates the low-cost geopolymer's effectiveness for this study and its competitiveness compared with other studies. Adsorption kinetics follows the pseudo second-order kinetics model at the lower initial concentration of Cu2+. |
| first_indexed | 2024-04-09T15:27:44Z |
| format | Article |
| id | doaj.art-39c3b89281434672ab6e89c433bd7947 |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-04-09T15:27:44Z |
| publishDate | 2022-03-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-39c3b89281434672ab6e89c433bd79472023-04-28T11:04:59ZengThe Royal SocietyRoyal Society Open Science2054-57032022-03-019310.1098/rsos.211644The use of zeolite-based geopolymers as adsorbent for copper removal from aqueous mediaHaci Baykara0Maria de Lourdes Mendoza Solorzano1Jose Javier Delgado Echeverria2Mauricio H. Cornejo3Clotario V. Tapia-Bastidas4Facultad de Ingeniería Mecánica y Ciencias de la Producción, Escuela Superior Politécnica de Litoral, ESPOL, Campus Gustavo Galindo km 30.5 Vía Perimetral, Guayaquil, EcuadorDepartamento Ciencias Químicas y Ambientales, Facultad de Ciencias Naturales y Matemáticas, Escuela Superior Politécnica de Litoral, ESPOL, Campus Gustavo Galindo km 30.5 Vía Perimetral, Guayaquil, EcuadorDepartamento Ciencias Químicas y Ambientales, Facultad de Ciencias Naturales y Matemáticas, Escuela Superior Politécnica de Litoral, ESPOL, Campus Gustavo Galindo km 30.5 Vía Perimetral, Guayaquil, EcuadorFacultad de Ingeniería Mecánica y Ciencias de la Producción, Escuela Superior Politécnica de Litoral, ESPOL, Campus Gustavo Galindo km 30.5 Vía Perimetral, Guayaquil, EcuadorFacultad de Ingeniería Mecánica y Ciencias de la Producción, Escuela Superior Politécnica de Litoral, ESPOL, Campus Gustavo Galindo km 30.5 Vía Perimetral, Guayaquil, EcuadorCopper has been proven to have hazardous effects on human beings depending on its concentration levels. Recently, there has been a growing interest in developing geopolymers using local industrial minerals and by-products. However, research on the adsorption of heavy metals by geopolymer based on mordenite-rich tuffs is still limited. The geopolymer adsorbents have been synthesized using natural Ecuadorian zeolite-rich tuffs containing quartz, mordenite calcite and amorphous content with 20.8%, 28.5%, 4.2% and 46.4%, respectively. The geopolymers showed a maximum compressive strength of 26.86 MPa for 28 d of curing time. In the present study, an Ecuadorian zeolite-based geopolymer's removal capacity on copper ions in aqueous solutions, varying concentration and contact time were tested. Kinetic models were developed using pseudo first-order, pseudo second-order and the Elovich model. The adsorption data, using Cu2+ concentrations from 20 to 160 ppm, at 25°C were described by the Langmuir and Freundlich isotherms. Linear coefficient of determination (R2) results show that the Langmuir model fits the best. The attained adsorption capacity of 52.63 mg g−1 demonstrates the low-cost geopolymer's effectiveness for this study and its competitiveness compared with other studies. Adsorption kinetics follows the pseudo second-order kinetics model at the lower initial concentration of Cu2+.https://royalsocietypublishing.org/doi/10.1098/rsos.211644geopolymeradsorptionzeoliteswastewaterkineticsadsorption isotherms |
| spellingShingle | Haci Baykara Maria de Lourdes Mendoza Solorzano Jose Javier Delgado Echeverria Mauricio H. Cornejo Clotario V. Tapia-Bastidas The use of zeolite-based geopolymers as adsorbent for copper removal from aqueous media Royal Society Open Science geopolymer adsorption zeolites wastewater kinetics adsorption isotherms |
| title | The use of zeolite-based geopolymers as adsorbent for copper removal from aqueous media |
| title_full | The use of zeolite-based geopolymers as adsorbent for copper removal from aqueous media |
| title_fullStr | The use of zeolite-based geopolymers as adsorbent for copper removal from aqueous media |
| title_full_unstemmed | The use of zeolite-based geopolymers as adsorbent for copper removal from aqueous media |
| title_short | The use of zeolite-based geopolymers as adsorbent for copper removal from aqueous media |
| title_sort | use of zeolite based geopolymers as adsorbent for copper removal from aqueous media |
| topic | geopolymer adsorption zeolites wastewater kinetics adsorption isotherms |
| url | https://royalsocietypublishing.org/doi/10.1098/rsos.211644 |
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