Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent
This work presents a first approach concerning the valorization of Tectona Grandis tree by-products, from East Timor through their transformation into high activated carbon (AC) by chemical activation with KOH and K<sub>2</sub>CO<sub>3</sub>. The better ACs, Teak-KOH-1-1-700...
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MDPI AG
2022-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/17/5842 |
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| author | Isabel Pestana da Paixão Cansado Paulo Alexandre Mira Mourão Cristóvão Ramiro Belo |
| author_facet | Isabel Pestana da Paixão Cansado Paulo Alexandre Mira Mourão Cristóvão Ramiro Belo |
| author_sort | Isabel Pestana da Paixão Cansado |
| collection | DOAJ |
| description | This work presents a first approach concerning the valorization of Tectona Grandis tree by-products, from East Timor through their transformation into high activated carbon (AC) by chemical activation with KOH and K<sub>2</sub>CO<sub>3</sub>. The better ACs, Teak-KOH-1-1-700 and Teak-K<sub>2</sub>CO<sub>3</sub>-1-2-700, presented a high A<sub>BET</sub> (995 and 1132 m<sup>2</sup>·g<sup>−1</sup>) and micropore volume (0.43 and 0.5 cm<sup>3</sup>·g<sup>−1</sup>), respectively. Both ACs were tested on the removal of four pesticides, from the liquid phase. Both ACs performed better than existing commercial types, presenting a maximum adsorption capacity of 1.88, 1.67, 1.10 and 0.89 mmol·g<sup>−1</sup>, for 4-chloro-2-methylphenoxyacetic acid, 2,4-dichlorophenoxyacetic acid, diuron and atrazine, respectively. Pesticide adsorption from diluted and concentrated solutions confirms that diffusion is the limiting factor. The possibility of implementing a production unit for ACs in East Timor is very promising for that country. It presents an opportunity for job creation, biomass waste reduction and a contribution to environmental sustainability, thereby following the principles of a circular economy. |
| first_indexed | 2024-03-10T01:37:28Z |
| format | Article |
| id | doaj.art-6b731d76950043a59a929eaf7942f6b2 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T01:37:28Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-6b731d76950043a59a929eaf7942f6b22023-11-23T13:31:04ZengMDPI AGMaterials1996-19442022-08-011517584210.3390/ma15175842Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid EffluentIsabel Pestana da Paixão Cansado0Paulo Alexandre Mira Mourão1Cristóvão Ramiro Belo2MED—Mediterranean Institute for Agriculture, Environment and Development & Change—Global Change and Sustainability Institute, Departamento de Química e Bioquímica, Escola de Ciências e Tecnologia, Universidade de Évora, Rua Romão Ramalho nº 59, 7000-671 Évora, PortugalMED—Mediterranean Institute for Agriculture, Environment and Development & Change—Global Change and Sustainability Institute, Departamento de Química e Bioquímica, Escola de Ciências e Tecnologia, Universidade de Évora, Rua Romão Ramalho nº 59, 7000-671 Évora, PortugalDepartamento do Ensino de Química, Faculdade de Educação, Artes e Humanidades, Universidade Nacional Timor Lorosa’e, Rua Jacinto Cândido, Dili 314, Timor-LesteThis work presents a first approach concerning the valorization of Tectona Grandis tree by-products, from East Timor through their transformation into high activated carbon (AC) by chemical activation with KOH and K<sub>2</sub>CO<sub>3</sub>. The better ACs, Teak-KOH-1-1-700 and Teak-K<sub>2</sub>CO<sub>3</sub>-1-2-700, presented a high A<sub>BET</sub> (995 and 1132 m<sup>2</sup>·g<sup>−1</sup>) and micropore volume (0.43 and 0.5 cm<sup>3</sup>·g<sup>−1</sup>), respectively. Both ACs were tested on the removal of four pesticides, from the liquid phase. Both ACs performed better than existing commercial types, presenting a maximum adsorption capacity of 1.88, 1.67, 1.10 and 0.89 mmol·g<sup>−1</sup>, for 4-chloro-2-methylphenoxyacetic acid, 2,4-dichlorophenoxyacetic acid, diuron and atrazine, respectively. Pesticide adsorption from diluted and concentrated solutions confirms that diffusion is the limiting factor. The possibility of implementing a production unit for ACs in East Timor is very promising for that country. It presents an opportunity for job creation, biomass waste reduction and a contribution to environmental sustainability, thereby following the principles of a circular economy.https://www.mdpi.com/1996-1944/15/17/5842Tectona GrandisEast Timoractivated carbonchemical activationpesticide removalcircular economy |
| spellingShingle | Isabel Pestana da Paixão Cansado Paulo Alexandre Mira Mourão Cristóvão Ramiro Belo Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent Materials Tectona Grandis East Timor activated carbon chemical activation pesticide removal circular economy |
| title | Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent |
| title_full | Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent |
| title_fullStr | Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent |
| title_full_unstemmed | Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent |
| title_short | Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent |
| title_sort | using tectona grandis biomass to produce valuable adsorbents for pesticide removal from liquid effluent |
| topic | Tectona Grandis East Timor activated carbon chemical activation pesticide removal circular economy |
| url | https://www.mdpi.com/1996-1944/15/17/5842 |
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