{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,26]],"date-time":"2026-03-26T01:37:29Z","timestamp":1774489049721,"version":"3.50.1"},"reference-count":40,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2022,8,24]],"date-time":"2022-08-24T00:00:00Z","timestamp":1661299200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Funds through FCT\u2014Foundation for Science and Technology","award":["UIDB\/05183\/2020"],"award-info":[{"award-number":["UIDB\/05183\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>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 K2CO3. The better ACs, Teak-KOH-1-1-700 and Teak-K2CO3-1-2-700, presented a high ABET (995 and 1132 m2\u00b7g\u22121) and micropore volume (0.43 and 0.5 cm3\u00b7g\u22121), 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\u00b7g\u22121, 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.<\/jats:p>","DOI":"10.3390\/ma15175842","type":"journal-article","created":{"date-parts":[[2022,8,24]],"date-time":"2022-08-24T23:48:58Z","timestamp":1661384938000},"page":"5842","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Using Tectona Grandis Biomass to Produce Valuable Adsorbents for Pesticide Removal from Liquid Effluent"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2085-9157","authenticated-orcid":false,"given":"Isabel Pestana","family":"da Paix\u00e3o Cansado","sequence":"first","affiliation":[{"name":"MED\u2014Mediterranean Institute for Agriculture, Environment and Development & Change\u2014Global Change and Sustainability Institute, Departamento de Qu\u00edmica e Bioqu\u00edmica, Escola de Ci\u00eancias e Tecnologia, Universidade de \u00c9vora, Rua Rom\u00e3o Ramalho n\u00ba 59, 7000-671 \u00c9vora, Portugal"},{"name":"LAQV-Requimte, Departamento de Qu\u00edmica e Bioqu\u00edmica, ECT, IIFA, Universidade de \u00c9vora, Rua Rom\u00e3o Ramalho n\u00ba 59, 7000-671 \u00c9vora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3634-2390","authenticated-orcid":false,"given":"Paulo Alexandre Mira","family":"Mour\u00e3o","sequence":"additional","affiliation":[{"name":"MED\u2014Mediterranean Institute for Agriculture, Environment and Development & Change\u2014Global Change and Sustainability Institute, Departamento de Qu\u00edmica e Bioqu\u00edmica, Escola de Ci\u00eancias e Tecnologia, Universidade de \u00c9vora, Rua Rom\u00e3o Ramalho n\u00ba 59, 7000-671 \u00c9vora, Portugal"}]},{"given":"Crist\u00f3v\u00e3o Ramiro","family":"Belo","sequence":"additional","affiliation":[{"name":"Departamento do Ensino de Qu\u00edmica, Faculdade de Educa\u00e7\u00e3o, Artes e Humanidades, Universidade Nacional Timor Lorosa\u2019e, Rua Jacinto C\u00e2ndido, Dili 314, Timor-Leste"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"134","DOI":"10.3390\/agronomy12010134","article-title":"Dealing with Plastic Waste from Agriculture Activity","volume":"12","author":"Batista","year":"2022","journal-title":"Agronomy"},{"key":"ref_2","first-page":"96","article-title":"Use of dirty plastic waste as precursors for activated carbon production\u2014A contribution to the circular economy","volume":"1","author":"Cansado","year":"2021","journal-title":"Water Environ. J."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"393","DOI":"10.1007\/s10311-019-00955-0","article-title":"Methods for preparation and activation of activated carbon: A review","volume":"18","author":"Heidarinejad","year":"2020","journal-title":"Environ. Chem. Lett."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"431","DOI":"10.4236\/jep.2012.35054","article-title":"Disposal and treatment methods for pesticides containing wastewaters: Critical review and comparative analysis","volume":"3","author":"Hattab","year":"2012","journal-title":"J. Environ. Prot."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"130055","DOI":"10.1016\/j.chemosphere.2021.130055","article-title":"Toxicity and remediation of pharmaceuticals and pesticides using metal oxides and carbon nanomaterials","volume":"275","author":"Fallah","year":"2021","journal-title":"Chemosphere"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1016\/j.cej.2005.09.016","article-title":"Adsorption of phenol from aqueous solutions using activated carbons prepared from Tectona Grandis sawdust by ZnCl2 activation","volume":"115","author":"Mohanty","year":"2005","journal-title":"Chem. Eng. J."},{"key":"ref_7","first-page":"4","article-title":"Activated carbon quality produced by Tectona Grandis wastes: Activation methods and adsorption capacity","volume":"25","author":"Lima","year":"2020","journal-title":"Rev. Mat\u00e9ria"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"123929","DOI":"10.1016\/j.biortech.2020.123929","article-title":"Activated carbon derived from waste tangerine seed for the high-performance adsorption of carbamate pesticides from water and plant","volume":"316","author":"Wang","year":"2020","journal-title":"Bioresour. Technol."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Bergna, D., Romar, H., Tuomikoski, S., Runtti, H., Kangas, T., Tynj\u00e4l\u00e4, P., and Lassi, U. (2017). Activated Carbon from Renewable Sources: Thermochemical conversion and activation of biomass and carbon residues from biomass gasification. Waste Biomass Management, Springer.","DOI":"10.1007\/978-3-319-49595-8_9"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1016\/j.biortech.2017.10.033","article-title":"Valorisation of Tectona Grandis tree sawdust through the production of high activated carbon for environmental applications","volume":"249","author":"Cansado","year":"2018","journal-title":"Bioresour. Technol."},{"key":"ref_11","unstructured":"State of the World\u2019s Forest (2007). Food and Agriculture Organization of the United Nations. Produced by the Electronic Publishing Policy and Support Branch, Communication Division, FAO. Available online: fao.org."},{"key":"ref_12","first-page":"171","article-title":"Wood properties of teak (Tectona grandis) from a mature unmanaged stand in East Timor","volume":"58","author":"Miranda","year":"2011","journal-title":"J. Wood Sci. Jpn. Wood Res. Soc."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"100369","DOI":"10.1016\/j.colcom.2021.100370","article-title":"Effective removal of methylated phenol and chlorinated phenol from aqueous solutions using a new activated carbon derived from Halodule uninervis waste","volume":"41","author":"Nazal","year":"2021","journal-title":"Colloid Interface Sci. Commun."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"8314","DOI":"10.1038\/s41598-018-26655-3","article-title":"Exploring the Reusability of Synthetically Contaminated Wastewater Containing Crystal Violet Dye using Tectona grandis Sawdust as a Very Low-Cost Adsorbent","volume":"8","author":"Mashkoor","year":"2018","journal-title":"Sci. Rep."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"218","DOI":"10.1016\/j.rser.2015.02.051","article-title":"Agricultural bio-waste materials as potential sustainable precursors used for activated carbon production: A review","volume":"46","author":"Yahya","year":"2015","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"88","DOI":"10.1016\/j.wen.2021.02.001","article-title":"Modelling the adsorption of iron and manganese by activated carbon from teak and shea charcoal for continuous low flow","volume":"4","author":"Siabi","year":"2021","journal-title":"Water-Energy Nexus"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.rser.2018.02.003","article-title":"A review on the utilization of wood biomass as a sustainable precursor for activated carbon production and application","volume":"87","author":"Mohammed","year":"2018","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"e13525","DOI":"10.1002\/ep.13525","article-title":"Synthesis and characterization of activated carbon derived from Tectona grandis sawdust via green route","volume":"40","author":"Singh","year":"2021","journal-title":"Environ. Prog. Sustain. Energy"},{"key":"ref_19","first-page":"35","article-title":"Adsorption of Pb(II) ions on teak leaves activated carbon\u2014A kinetic and equilibrium study","volume":"1","author":"Jafar","year":"2005","journal-title":"Der Chem. Sin."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1","DOI":"10.61762\/ijbrvol4iss2art13902","article-title":"Preparation of activated carbons from teak sawdust using chicken dropping compost and empty fruit bunch","volume":"4","author":"Kongsomart","year":"2015","journal-title":"Int. J. Biomass Renew."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"012019","DOI":"10.1088\/1757-899X\/176\/1\/012019","article-title":"The usage of activated carbon from teak sawdust (tectona grandis l.f.) and zeolite for the adsorption of Cr(VI) and its analysis using solid-phase spectrophotometry (sps). International Conference on Advanced Materials for Better Future 2017","volume":"176","author":"Saputro","year":"2017","journal-title":"IOP Conf. Ser. Mater. Sci. Eng."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1016\/j.fuproc.2016.01.007","article-title":"Comparative study on characterization and adsorption properties of activated carbons by phosphoric acid activation from corncob and its acid and alkaline hydrolysis residues","volume":"144","author":"Zhu","year":"2016","journal-title":"Fuel Processing Technol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"131888","DOI":"10.1016\/j.chemosphere.2021.131888","article-title":"Extending granular activated carbon (GAC) bed life: A column study of in-situ chemical regeneration of pesticide loaded activated carbon for water treatment","volume":"286","author":"Larasati","year":"2022","journal-title":"Chemosphere"},{"key":"ref_24","unstructured":"(2012). Plano Estrat\u00e9gico do Minest\u00e9rio da Agricultura e Pescas da Rep\u00fablica Democr\u00e1tica de Timor Leste, 2014\u20132020, Ministry of Agriculture & Fisheries. Available online: spc.int."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1038\/s41561-021-00723-2","article-title":"A world view of pesticides","volume":"14","author":"Hough","year":"2021","journal-title":"Nat. Geosci."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"234","DOI":"10.1016\/j.jes.2022.04.023","article-title":"Organophosphate pesticides an emerging environmental contaminant: Pollution, toxicity, bioremediation progress, and remaining challenges","volume":"127","author":"Mali","year":"2022","journal-title":"J. Environ. Sci."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"64","DOI":"10.1016\/j.fuproc.2011.10.015","article-title":"The influence of the activated carbon post-treatment on the phenolic compound\u2019s removal","volume":"103","author":"Cansado","year":"2012","journal-title":"Fuel Process. Technol."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1016\/j.desal.2010.02.002","article-title":"Adsorption of 2,4-dichlorophenoxyacetic acid and carbofuran pesticides onto granular activated carbon","volume":"256","author":"Salman","year":"2010","journal-title":"Desalination"},{"key":"ref_29","unstructured":"Dire\u00e7\u00e3o Geral de Alimenta\u00e7\u00e3o e Veterin\u00e1ria (2022, April 21). Lista de Pesticidas a Pesquisar em \u00c1gua de Consumo Humano. (In Portuguese). Available online: https:\/\/www.dgav.pt\/wp-content\/uploads\/2021\/08\/DGAV_PCQA_2022-2024-19-08-2021.pdf."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"285","DOI":"10.1080\/09593330.2016.1190409","article-title":"Synthetic polymers blend used in the production of high activated carbon for pesticides removals from the liquid phase","volume":"38","author":"Belo","year":"2017","journal-title":"Environ. Technol."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1016\/0008-6223(87)90040-6","article-title":"Adsorption of nitrogen by porous and non-porous carbons","volume":"25","author":"Carrott","year":"1987","journal-title":"Carbon"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Palomba, V., and Frazzica, A. (2021). Modelling of sorption systems for thermal energy storage, Advances in Thermal Energy Storage Systems. 2nd Ed. Methods and Applications. Woodhead Publ. Ser. Energy, 453\u2013475.","DOI":"10.1016\/B978-0-12-819885-8.00015-2"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1016\/j.biortech.2005.11.006","article-title":"Preparation and characterization of activated carbon from palm shell by chemical activation with K2CO3","volume":"98","author":"Adinata","year":"2007","journal-title":"Bioresour. Technol."},{"key":"ref_34","unstructured":"Castro, C.S. (2009). Preparation of Activated Carbon from Coffee Grounds: Use as Catalytic Support for the Removal of Organic Pollutants in the Aqueous Medium. [Master\u2019s Thesis, Lavras University]. Available online: https:\/\/pt.scribd.com\/document\/311048911."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"34","DOI":"10.1016\/j.matlet.2015.01.161","article-title":"Activated carbons with well-developed mesoporosity prepared by activation with different alkali salts","volume":"146","author":"Yuen","year":"2015","journal-title":"Mater. Lett."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"105905","DOI":"10.1016\/j.jece.2021.105905","article-title":"Analysis of factors influencing pore structure development of agricultural and forestry waste-derived activated carbon for adsorption application in gas and liquid phases: A review","volume":"9","author":"Zhu","year":"2021","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1016\/j.jconhyd.2018.10.003","article-title":"Adsorption and removal of phenoxy acetic herbicides from water by using commercial activated carbons: Experimental and computational studies","volume":"218","author":"Spaltro","year":"2018","journal-title":"J. Contam. Hydrol."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"785","DOI":"10.1007\/s10973-010-0840-7","article-title":"Adsorption of selected herbicides from aqueous solutions on activated carbon","volume":"101","author":"Blachnio","year":"2010","journal-title":"J. Therm. Anal. Calorim."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.cej.2009.09.013","article-title":"Insights into the modelling of adsorption isotherm systems","volume":"156","author":"Foo","year":"2010","journal-title":"Chem. Eng. J."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"181","DOI":"10.3103\/S0361521922030041","article-title":"Influence of the Surface Characteristics of Activated Carbon on the Adsorption of Herbicides (A Review)","volume":"56","author":"Kulaishin","year":"2022","journal-title":"Solid Fuel Chem."}],"container-title":["Materials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1996-1944\/15\/17\/5842\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:14:44Z","timestamp":1760141684000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1996-1944\/15\/17\/5842"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,8,24]]},"references-count":40,"journal-issue":{"issue":"17","published-online":{"date-parts":[[2022,9]]}},"alternative-id":["ma15175842"],"URL":"https:\/\/doi.org\/10.3390\/ma15175842","relation":{},"ISSN":["1996-1944"],"issn-type":[{"value":"1996-1944","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,8,24]]}}}