The Role of Oxygenated Functional Groups on Cadmium Removal using Pyrochar and Hydrochar Derived from <i>Guadua angustifolia</i> Residues
In the Ecuadorian Amazonia, there is a concern about the presence of high concentrations of cadmium (Cd) in rivers and sediments because of changes in land use and anthropogenic activities, e.g., mining and oil exploitation. Hence, the research related to water treatment processes to meet environmen...
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MDPI AG
2023-01-01
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| Online Access: | https://www.mdpi.com/2073-4441/15/3/525 |
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| author | Carlos Navas-Cárdenas Manuel Caetano Diana Endara Rocío Jiménez Ana B. Lozada Lucía E. Manangón Angélica Navarrete Carlos Reinoso Alicia E. Sommer-Márquez Yanet Villasana |
| author_facet | Carlos Navas-Cárdenas Manuel Caetano Diana Endara Rocío Jiménez Ana B. Lozada Lucía E. Manangón Angélica Navarrete Carlos Reinoso Alicia E. Sommer-Márquez Yanet Villasana |
| author_sort | Carlos Navas-Cárdenas |
| collection | DOAJ |
| description | In the Ecuadorian Amazonia, there is a concern about the presence of high concentrations of cadmium (Cd) in rivers and sediments because of changes in land use and anthropogenic activities, e.g., mining and oil exploitation. Hence, the research related to water treatment processes to meet environmental standards has gained relevance. The use of biochar (BC) as adsorbent is considered a promising and low-cost alternative to improve the water quality in developing countries. In this work, lignocellulosic wastes from <i>Guadua angustifolia</i> were transformed through thermochemical treatments, into a promising carbonaceous material, such as BC. BC samples were prepared by pyrolysis (termed pyrochar, PC) and hydrothermal carbonization (termed hydrochar, HC). Their physicochemical properties were correlated with the Cd adsorption removal performance, analyzing the effect of adsorbent dosage, initial solution pH, adsorption kinetics and adsorption isotherms. HC showed the highest Cd adsorption performance, due to the presence of a higher number of oxygenated functional groups, as confirmed by FTIR, XPS and Raman spectroscopy. This research has proposed a sustainable alternative for the recovery of an available waste, contributing to mitigate the effects of the presence of metals on the health and economy of the most vulnerable sectors of society. |
| first_indexed | 2024-03-11T09:19:47Z |
| format | Article |
| id | doaj.art-4fed517dc0a14e65b4460a92c90c5b63 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T09:19:47Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-4fed517dc0a14e65b4460a92c90c5b632023-11-16T18:23:55ZengMDPI AGWater2073-44412023-01-0115352510.3390/w15030525The Role of Oxygenated Functional Groups on Cadmium Removal using Pyrochar and Hydrochar Derived from <i>Guadua angustifolia</i> ResiduesCarlos Navas-Cárdenas0Manuel Caetano1Diana Endara2Rocío Jiménez3Ana B. Lozada4Lucía E. Manangón5Angélica Navarrete6Carlos Reinoso7Alicia E. Sommer-Márquez8Yanet Villasana9School of Chemical Sciences & Engineering, Yachay Tech University, Urcuquí 100119, EcuadorSchool of Chemical Sciences & Engineering, Yachay Tech University, Urcuquí 100119, EcuadorDepartment of Extractive Metallurgy, Escuela Politécnica Nacional, Quito 170517, EcuadorBiomass Laboratory, Biomass to Resources Group, Universidad Regional Amazónica Ikiam, Tena 096975, EcuadorDepartment of Extractive Metallurgy, Escuela Politécnica Nacional, Quito 170517, EcuadorDepartment of Extractive Metallurgy, Escuela Politécnica Nacional, Quito 170517, EcuadorBiomass Laboratory, Biomass to Resources Group, Universidad Regional Amazónica Ikiam, Tena 096975, EcuadorSchool of Physical Sciences & Nanotechnology, Yachay Tech University, Urcuquí 100119, EcuadorSchool of Chemical Sciences & Engineering, Yachay Tech University, Urcuquí 100119, EcuadorBiomass Laboratory, Biomass to Resources Group, Universidad Regional Amazónica Ikiam, Tena 096975, EcuadorIn the Ecuadorian Amazonia, there is a concern about the presence of high concentrations of cadmium (Cd) in rivers and sediments because of changes in land use and anthropogenic activities, e.g., mining and oil exploitation. Hence, the research related to water treatment processes to meet environmental standards has gained relevance. The use of biochar (BC) as adsorbent is considered a promising and low-cost alternative to improve the water quality in developing countries. In this work, lignocellulosic wastes from <i>Guadua angustifolia</i> were transformed through thermochemical treatments, into a promising carbonaceous material, such as BC. BC samples were prepared by pyrolysis (termed pyrochar, PC) and hydrothermal carbonization (termed hydrochar, HC). Their physicochemical properties were correlated with the Cd adsorption removal performance, analyzing the effect of adsorbent dosage, initial solution pH, adsorption kinetics and adsorption isotherms. HC showed the highest Cd adsorption performance, due to the presence of a higher number of oxygenated functional groups, as confirmed by FTIR, XPS and Raman spectroscopy. This research has proposed a sustainable alternative for the recovery of an available waste, contributing to mitigate the effects of the presence of metals on the health and economy of the most vulnerable sectors of society.https://www.mdpi.com/2073-4441/15/3/525biochar<i>Guadua angustifolia</i>pyrolysishydrothermal carbonizationcadmiumadsorption |
| spellingShingle | Carlos Navas-Cárdenas Manuel Caetano Diana Endara Rocío Jiménez Ana B. Lozada Lucía E. Manangón Angélica Navarrete Carlos Reinoso Alicia E. Sommer-Márquez Yanet Villasana The Role of Oxygenated Functional Groups on Cadmium Removal using Pyrochar and Hydrochar Derived from <i>Guadua angustifolia</i> Residues Water biochar <i>Guadua angustifolia</i> pyrolysis hydrothermal carbonization cadmium adsorption |
| title | The Role of Oxygenated Functional Groups on Cadmium Removal using Pyrochar and Hydrochar Derived from <i>Guadua angustifolia</i> Residues |
| title_full | The Role of Oxygenated Functional Groups on Cadmium Removal using Pyrochar and Hydrochar Derived from <i>Guadua angustifolia</i> Residues |
| title_fullStr | The Role of Oxygenated Functional Groups on Cadmium Removal using Pyrochar and Hydrochar Derived from <i>Guadua angustifolia</i> Residues |
| title_full_unstemmed | The Role of Oxygenated Functional Groups on Cadmium Removal using Pyrochar and Hydrochar Derived from <i>Guadua angustifolia</i> Residues |
| title_short | The Role of Oxygenated Functional Groups on Cadmium Removal using Pyrochar and Hydrochar Derived from <i>Guadua angustifolia</i> Residues |
| title_sort | role of oxygenated functional groups on cadmium removal using pyrochar and hydrochar derived from i guadua angustifolia i residues |
| topic | biochar <i>Guadua angustifolia</i> pyrolysis hydrothermal carbonization cadmium adsorption |
| url | https://www.mdpi.com/2073-4441/15/3/525 |
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