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Abstract

Biochar Valorization from Oregano and Citronella Residues: Impacts on Radish Growth and Methyl Orange Dye Removal †

1
Plateforme de Recherche et d’Analyse en Sciences de l’Environnement (EDST-PRASE), Beirut P.O. Box 6573/14, Lebanon
2
Department of Chemistry and Biochemistry, Islamic University of Lebanon (IUL), Khalde P.O. Box 30014, Lebanon
3
Department of Chemistry and Biochemistry, Lebanese University, Hadat P.O. Box 6573/14, Lebanon
*
Author to whom correspondence should be addressed.
Presented at the 3rd International Electronic Conference on Processes—Green and Sustainable Process Engineering and Process Systems Engineering (ECP 2024), 29–31 May 2024; Available online: https://sciforum.net/event/ECP2024.
Proceedings 2024, 105(1), 119; https://doi.org/10.3390/proceedings2024105119
Published: 28 May 2024
In recent years, the rapidly growing essential oil industry has generated residues that, if improperly managed, can harm ecosystems by contaminating soil and water. This study proposes a sustainable solution by converting these residues into biochar through pyrolysis. We specifically examine the potential of oregano and citronella biochars to remove methylene orange dye and evaluate their safety for use in water treatment and soil enhancement.
This research assessed the impact of oregano and citronella biochars, produced at various temperatures, on radish seed germination and root development. The control group showed strong results with 90–100% germination and an average root length of 3.54 cm. Oregano biochar at 300 °C was toxic to seed growth, while oregano biochar at 400 °C improved germination but did not match the control group. Citronella biochar at both 300 °C and 400 °C resulted in better germination rates but still fell short of the control group. Additionally, our findings reveal that citronella biochar (BCR) at 400 °C successfully removed 88.8% of the methyl orange dye. However, the combination of oregano biochar (BOR) and citronella biochar (BCR) at 300 °C did not significantly affect dye concentration reduction. In conclusion, while applying BOR and BCR produced at 400 °C to soil is environmentally safe, it does not markedly enhance plant growth. These results highlight the critical considerations for using these biochars in agricultural practices.

Author Contributions

Conceptualization, A.H; data curation, M.R. and L.Y. formal analysis, M.R., G.K. and C.H. funding acquisition, A.H.; investigation, M.H.E.-D. and C.H.; Methodology, L.Y. and M.H.E.-D.; project administration, M.H.E.-D.; resources, M.R. and A.H.; supervision, K.H and M.H.E.-D.; validation, M.R., K.H., A.H., C.H. and M.H.E.-D.; visualization, A.H. and G.K.; writing—original draft, M.R.; writing—review and editing, C.H., K.H. and M.H.E.-D. All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

The original contributions presented in the study are included in the article, further inquiries can be directed to the corresponding author.

Conflicts of Interest

The authors declare no conflicts of interest.
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Share and Cite

MDPI and ACS Style

Rammal, M.; Haidar, C.; Kataya, G.; Hijazi, A.; Yazbek, L.; Haidar, K.; El-Dakdouki, M.H. Biochar Valorization from Oregano and Citronella Residues: Impacts on Radish Growth and Methyl Orange Dye Removal. Proceedings 2024, 105, 119. https://doi.org/10.3390/proceedings2024105119

AMA Style

Rammal M, Haidar C, Kataya G, Hijazi A, Yazbek L, Haidar K, El-Dakdouki MH. Biochar Valorization from Oregano and Citronella Residues: Impacts on Radish Growth and Methyl Orange Dye Removal. Proceedings. 2024; 105(1):119. https://doi.org/10.3390/proceedings2024105119

Chicago/Turabian Style

Rammal, Marwa, Chaden Haidar, Ghenwa Kataya, Akram Hijazi, Lara Yazbek, Khodor Haidar, and Mohammad H. El-Dakdouki. 2024. "Biochar Valorization from Oregano and Citronella Residues: Impacts on Radish Growth and Methyl Orange Dye Removal" Proceedings 105, no. 1: 119. https://doi.org/10.3390/proceedings2024105119

APA Style

Rammal, M., Haidar, C., Kataya, G., Hijazi, A., Yazbek, L., Haidar, K., & El-Dakdouki, M. H. (2024). Biochar Valorization from Oregano and Citronella Residues: Impacts on Radish Growth and Methyl Orange Dye Removal. Proceedings, 105(1), 119. https://doi.org/10.3390/proceedings2024105119

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