Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic Wastewater
This research focuses on the removal of contaminants from wastewaters as a matter of great interest in the field of water pollution. The first decades of the 21st century have brought numerous approaches for the development of cheaper and more effective adsorbents capable of eliminating heavy metals...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/12/9/2500 |
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| author | Dora Luz Gómez Aguilar Juan Pablo Rodríguez Miranda Deisy Baracaldo Guzmán Javier Andrés Esteban Muñoz |
| author_facet | Dora Luz Gómez Aguilar Juan Pablo Rodríguez Miranda Deisy Baracaldo Guzmán Javier Andrés Esteban Muñoz |
| author_sort | Dora Luz Gómez Aguilar |
| collection | DOAJ |
| description | This research focuses on the removal of contaminants from wastewaters as a matter of great interest in the field of water pollution. The first decades of the 21st century have brought numerous approaches for the development of cheaper and more effective adsorbents capable of eliminating heavy metals. The study aims to examine the way coffee pulp (Castilla variety from Caldas, Colombia) was used as a bioadsorbent for the removal of Mn (II) from synthetic wastewater to fulfill goals 3 and 6 proposed in the Sustainable Development Goals stated for the 2030 Agenda, particularly in Sections 3.9 and 6.9. In order to achieve this objective, the agricultural residue was subjected to bromatological characterization, determination of the lignocellulosic composition, and identification of characteristic organic functional groups through IR spectrophotometry, using the ATR (attenuated total reflection) technique. Additionally, the optimal parameters for contaminant removal were identified, regarding the biomass quantity, the optimum pH, the stirring time, the adsorption kinetics, the zero charge potential (pHpzc), the adsorption isotherms, and the explanation of the possible adsorption mechanisms between the contaminant, the surface of the coffee pulp, and the capacity of maximum adsorption. The results show that lignocellulosic material presented a cellulose content of 29.93 ± 0.21% and a lignin content of 19.25 ± 0.16%. The optimum parameters found were as follows: Particle size of 180 µm, contact time from 90 min to 100 RPM, optimum pH of 4.0 pH units, room temperature; the kinetic model adjusted to the bioadsorption process was Ho and McKay’s pseudo-second-order, under an isotherm of the Langmuir model, for which the removal presented was 53.40%, with a maximum adsorption capacity of 8.01 mg·g<sup>−1</sup>. Finally, the novelty of the reported research consists of using coffee pulp as a bioadsorbent without chemical modification, for the removal of heavy metals, in this case Mn (II), in industrial wastewater, which would be another application of this coffee by-product. |
| first_indexed | 2024-03-10T16:29:35Z |
| format | Article |
| id | doaj.art-5ea63d485ba04c37b7c5219ad6c3372a |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T16:29:35Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-5ea63d485ba04c37b7c5219ad6c3372a2023-11-20T12:54:21ZengMDPI AGWater2073-44412020-09-01129250010.3390/w12092500Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic WastewaterDora Luz Gómez Aguilar0Juan Pablo Rodríguez Miranda1Deisy Baracaldo Guzmán2Javier Andrés Esteban Muñoz3Chemistry Department, National Pedagogical University, Bogota 110231, ColombiaFacultad del Medio Ambiente y Recursos Naturales, University Distrital Francisco José de Caldas (UDFJC), Bogota 110231, ColombiaChemistry Department, National Pedagogical University, Bogota 110231, ColombiaChemistry Department, National Pedagogical University, Bogota 110231, ColombiaThis research focuses on the removal of contaminants from wastewaters as a matter of great interest in the field of water pollution. The first decades of the 21st century have brought numerous approaches for the development of cheaper and more effective adsorbents capable of eliminating heavy metals. The study aims to examine the way coffee pulp (Castilla variety from Caldas, Colombia) was used as a bioadsorbent for the removal of Mn (II) from synthetic wastewater to fulfill goals 3 and 6 proposed in the Sustainable Development Goals stated for the 2030 Agenda, particularly in Sections 3.9 and 6.9. In order to achieve this objective, the agricultural residue was subjected to bromatological characterization, determination of the lignocellulosic composition, and identification of characteristic organic functional groups through IR spectrophotometry, using the ATR (attenuated total reflection) technique. Additionally, the optimal parameters for contaminant removal were identified, regarding the biomass quantity, the optimum pH, the stirring time, the adsorption kinetics, the zero charge potential (pHpzc), the adsorption isotherms, and the explanation of the possible adsorption mechanisms between the contaminant, the surface of the coffee pulp, and the capacity of maximum adsorption. The results show that lignocellulosic material presented a cellulose content of 29.93 ± 0.21% and a lignin content of 19.25 ± 0.16%. The optimum parameters found were as follows: Particle size of 180 µm, contact time from 90 min to 100 RPM, optimum pH of 4.0 pH units, room temperature; the kinetic model adjusted to the bioadsorption process was Ho and McKay’s pseudo-second-order, under an isotherm of the Langmuir model, for which the removal presented was 53.40%, with a maximum adsorption capacity of 8.01 mg·g<sup>−1</sup>. Finally, the novelty of the reported research consists of using coffee pulp as a bioadsorbent without chemical modification, for the removal of heavy metals, in this case Mn (II), in industrial wastewater, which would be another application of this coffee by-product.https://www.mdpi.com/2073-4441/12/9/2500coffee pulp (CP)synthetic wastewater (SW)bioadsorbentsustainable development goals (SDGs)manganese |
| spellingShingle | Dora Luz Gómez Aguilar Juan Pablo Rodríguez Miranda Deisy Baracaldo Guzmán Javier Andrés Esteban Muñoz Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic Wastewater Water coffee pulp (CP) synthetic wastewater (SW) bioadsorbent sustainable development goals (SDGs) manganese |
| title | Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic Wastewater |
| title_full | Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic Wastewater |
| title_fullStr | Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic Wastewater |
| title_full_unstemmed | Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic Wastewater |
| title_short | Using Coffee Pulp as Bioadsorbent for the Removal of Manganese (Mn (II)) from Synthetic Wastewater |
| title_sort | using coffee pulp as bioadsorbent for the removal of manganese mn ii from synthetic wastewater |
| topic | coffee pulp (CP) synthetic wastewater (SW) bioadsorbent sustainable development goals (SDGs) manganese |
| url | https://www.mdpi.com/2073-4441/12/9/2500 |
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