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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Adsorption of atrazine from aqueous systems on chemically activated biochar produced from corn straw

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Author(s):
do Nascimento, Cleuciane Tillvitz [1] ; Vieira, Melissa Gurgel Adeodato [2] ; Scheufele, Fabiano Bisinella [3] ; Palu, Fernando [1] ; da Silva, Edson Antonio [1] ; Borba, Carlos Eduardo [1]
Total Authors: 6
Affiliation:
[1] Western Parana State Univ, UNIOESTE, Campus Toledo, Rua Faculdade 645, BR-85903000 Toledo, PR - Brazil
[2] Univ Estadual Campinas, UNICAMP, Sch Chem Engn, Cidade Univ Zeferino Vaz, POB 6066, BR-13081970 Campinas, SP - Brazil
[3] Technol Fed Univ Parana UTFPR, Grad Program Chem & Biotechnol Proc, Campus Toledo, Rua Cristo Rei 19, BR-85902490 Toledo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 10, n. 1 FEB 2022.
Web of Science Citations: 0
Abstract

In this research, the atrazine adsorption onto activated biochar produced from corn straw was evaluated based on kinetic and equilibrium studies and physical, chemical and morphological analyses. Batch adsorption experiments were performed to obtain kinetic and equilibrium parameters which were used to simulate the process' performance on fixed-bed column. The activated biochar showed specific surface area, total pore volume and average pore radius of 573 m(2) g(-1), 0.3054 cm(3) g(-1) and 10.7 angstrom, respectively, while the non-activated biochar exhibited lower specific surface area (504 m(2) g(-1)) in comparison with the activated biochar. The atrazine adsorption mechanism was predominantly driven by hydrogen bonds and pi-pi stacking. The experimental equilibrium data was adequately described by Langmuir isotherm, showing high adsorbate-adsorbent affinity (K-L = 4.287 L mg(-1)). The adsorbent also showed favorable kinetics which was well described by the intraparticle diffusion model. The atrazine adsorption dynamics on fixed-bed column packed with the produced biochar was investigated by using an experimental design associated to phenomenological mathematical modeling. The approach was able to predict the column behavior from the batch parameters and was experimentally validated, showing an efficiency of 72% and breakthrough time of 520 min. The results evidenced the effectiveness of the produced biochar to remove atrazine from water as well as the model to adequately predict the batch and column's performance. (AU)

FAPESP's process: 20/16004-9 - Development of advanced materials and artificial intelligence-based models for application for the removal and monitoring of emerging pollutants in aqueous media
Grantee:Meuris Gurgel Carlos da Silva
Support Opportunities: Regular Research Grants
FAPESP's process: 19/11353-8 - Brazilian Water Research Center (BWRC)
Grantee:Lauro Tatsuo Kubota
Support Opportunities: Research Grants - Research Centers in Engineering Program