Abstract
Over the last years, the strategy of employing inevitable organic waste and residue streams to produce valuable and greener materials for a wide range of applications has been proven an efficient and suitable approach. In this research, sulfur-doped porous biochar was produced through a single-step pyrolysis of birch waste tree in the presence of zinc chloride as chemical activator. The sulfur doping process led to a remarkable impact on the biochar structure. Moreover, it was shown that sulfur doping also had an important impact on sodium diclofenac (S-DCF) removal from aqueous solutions due to the introduction of S-functionalities on biochar surface. The adsorption experiments suggested that General and Liu models offered the best fit for the kinetic and equilibrium studies, respectively. The results showed that the kinetic was faster for the S-doped biochar while the maximum adsorption capacity values at 318 K were 564 mg g−1 (non-doped) and 693 mg g−1 (S-doped); highlighting the better affinity of S-doped biochar for the S-DCF molecule compared to non-doped biochar. The thermodynamic parameters (ΔH0, ΔS0, ΔG0) suggested that the S-DCF removal on both adsorbents was spontaneous, favourable, and endothermic.
| Original language | English |
|---|---|
| Article number | 118595 |
| Pages (from-to) | 118595 |
| Journal | Environmental Research |
| Volume | 251 |
| DOIs | |
| Publication status | Published - 15 Jun 2024 |
| MoE publication type | A1 Journal article-refereed |
Funding
The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:Glaydson Simoes dos Reis reports financial support was provided by Swedish University of Agricultural Sciences. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.The authors wish to thank Bio4Energy, a strategic research environment appointed by the Swedish government, as well as the Swedish University of Agricultural Sciences for supporting this work. Financial support from Interreg Aurora (grant No. 20361711), the Swedish Research Council Formas (grant No. 2021–00877), and Kempes Foundation (grant No. JCSMK23-0145) is gratefully acknowledged. The Umeå Core Facility for Electron Microscopy (UCEM-NMI node) and the Vibrational Spectroscopy Core Facility (ViSp) at the Chemical Biological Centre (KBC), Umeå University, are acknowledged. The authors wish to thank A. Gorzsas for support with Raman measurements and A. Shchukarev for support with the XPS measurements. The authors thank CNPq, FINEP, and CAPES from Brazil for partially supporting this research. In addition, the authors are also grateful to the Researchers Supporting Project number (RSP 2024R8), King Saud University, Riyadh, Saudi Arabia, for the financial support. The authors wish to thank Bio4Energy, a strategic research environment appointed by the Swedish government, as well as the Swedish University of Agricultural Sciences for supporting this work. Financial support from Interreg Aurora (grant No. 20361711 ), the Swedish Research Council Formas (grant No. 2021–00877 ), and Kempes Foundation (grant No. JCSMK23-0145 ) is gratefully acknowledged. The Umeå Core Facility for Electron Microscopy (UCEM-NMI node) and the Vibrational Spectroscopy Core Facility (ViSp) at the Chemical Biological Centre (KBC), Umeå University, are acknowledged. The authors wish to thank A. Gorzsas for support with Raman measurements and A. Shchukarev for support with the XPS measurements. The authors thank CNPq , FINEP , and CAPES from Brazil for partially supporting this research. In addition, the authors are also grateful to the Researchers Supporting Project number (RSP 2024R8), King Saud University , Riyadh, Saudi Arabia, for the financial support.
Keywords
- Fast adsorption's kinetic
- Heteroatom doping
- Sulfur-doped biochar