TY - JOUR
T1 - Competitive adsorption of acetaminophen and caffeine onto activated Tingui biochar
T2 - characterization, modeling, and mechanisms
AU - dos Santos, Débora Federici
AU - Moreira, Wardleison Martins
AU - de Araújo, Thiago Peixoto
AU - Bernardo, Maria Manuel Serrano
AU - de Figueiredo Ligeiro da Fonseca, Isabel Maria
AU - Ostroski, Indianara Conceição
AU - de Barros, Maria Angélica Simões Dornellas
N1 - Funding
info:eu-repo/grantAgreement/FCT/Concurso de avaliação no âmbito do Programa Plurianual de Financiamento de Unidades de I&D (2017%2F2018) - Financiamento Base/UIDB%2F50006%2F2020/PT#
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50006%2F2020/PT#
This study was funded in part by the National Council for Scientific and Technological Development — CNPq (Process 200678/2022–1).
Acknowledgements
info:eu-repo/grantAgreement/FCT/DL 57%2F2016/DL 57%2F2016%2FCP1482%2FCT0134/PT#
The authors also thank the Pontal Multiuser Laboratory of the Federal University of Uberlândia (FINEP 01.13.0371.00), including Drª. Rosana Maria Nascimento de Assunção and Drº Anízio Marcio de Faria.
Publisher Copyright:
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2023.
PY - 2024/9
Y1 - 2024/9
N2 - Tingui biochar (TB) activated with potassium hydroxide (TB-KOH) was synthesized in the present study. The adsorption capacity of TB-KOH was evaluated for the removal of acetaminophen and caffeine in monocomponent and bicomponent solutions. As a result, the study of the TB-KOH characterization as well as the adsorption kinetics, isotherm, thermodynamics, and a suggestion of the global adsorption mechanism are presented. TB-KOH was characterized through physical–chemical analysis to understand its surface morphology and how it contributes to the adsorption of these drugs. Furthermore, modelling using advanced statistical physical models was performed to describe how acetaminophen and caffeine molecules are adsorbed in the active sites of TB-KOH. Through the characterizations, it was observed that the activation with KOH contributed to the development of porosity and functional groups (-OH, C-O, and C = O) on the surface of TB. The monocomponent adsorption equilibrium was reached in 90 min with a maximum adsorption capacity of 424.7 and 350.8 mg g−1 for acetaminophen and caffeine, respectively. For the bicomponent solution adsorption, the maximum adsorption capacity was 199.4 and 297.5 mg g−1 for acetaminophen and caffeine, respectively. The isotherm data was best fitted to the Sips model, and the thermodynamic study indicated that acetaminophen removal was endothermic, while caffeine removal was exothermic. The mechanism of adsorption of acetaminophen and caffeine by TB-KOH was described by the involvement of hydrogen bonds and π-π interactions between the surface of TB-KOH and the molecules of the contaminants. Graphical Abstract: (Figure presented.)
AB - Tingui biochar (TB) activated with potassium hydroxide (TB-KOH) was synthesized in the present study. The adsorption capacity of TB-KOH was evaluated for the removal of acetaminophen and caffeine in monocomponent and bicomponent solutions. As a result, the study of the TB-KOH characterization as well as the adsorption kinetics, isotherm, thermodynamics, and a suggestion of the global adsorption mechanism are presented. TB-KOH was characterized through physical–chemical analysis to understand its surface morphology and how it contributes to the adsorption of these drugs. Furthermore, modelling using advanced statistical physical models was performed to describe how acetaminophen and caffeine molecules are adsorbed in the active sites of TB-KOH. Through the characterizations, it was observed that the activation with KOH contributed to the development of porosity and functional groups (-OH, C-O, and C = O) on the surface of TB. The monocomponent adsorption equilibrium was reached in 90 min with a maximum adsorption capacity of 424.7 and 350.8 mg g−1 for acetaminophen and caffeine, respectively. For the bicomponent solution adsorption, the maximum adsorption capacity was 199.4 and 297.5 mg g−1 for acetaminophen and caffeine, respectively. The isotherm data was best fitted to the Sips model, and the thermodynamic study indicated that acetaminophen removal was endothermic, while caffeine removal was exothermic. The mechanism of adsorption of acetaminophen and caffeine by TB-KOH was described by the involvement of hydrogen bonds and π-π interactions between the surface of TB-KOH and the molecules of the contaminants. Graphical Abstract: (Figure presented.)
KW - Adsorption mechanisms
KW - Batch adsorption
KW - Pharmaceuticals
KW - Theoretical models
UR - http://www.scopus.com/inward/record.url?scp=85199552523&partnerID=8YFLogxK
U2 - 10.1007/s11356-023-31024-3
DO - 10.1007/s11356-023-31024-3
M3 - Article
C2 - 38008834
AN - SCOPUS:85199552523
SN - 0944-1344
VL - 31
SP - 53611
EP - 53628
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
IS - 41
ER -