Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt
Ashour, N., El-Shoubaky, G., Saleh, M., Mostafa, N. (2025). Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt. EKB Journal Management System, 68(10), 441-449. doi: 10.21608/ejchem.2025.354002.11191
Nourhan Ashour; Gihan A. El-Shoubaky; Marwa M. Saleh; Nasser Mostafa Mostafa. "Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt". EKB Journal Management System, 68, 10, 2025, 441-449. doi: 10.21608/ejchem.2025.354002.11191
Ashour, N., El-Shoubaky, G., Saleh, M., Mostafa, N. (2025). 'Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt', EKB Journal Management System, 68(10), pp. 441-449. doi: 10.21608/ejchem.2025.354002.11191
Ashour, N., El-Shoubaky, G., Saleh, M., Mostafa, N. Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt. EKB Journal Management System, 2025; 68(10): 441-449. doi: 10.21608/ejchem.2025.354002.11191

Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt

Egyptian Journal of Chemistry
Volume 68, Issue 10, October 2025, Page 441-449  XML PDF (1.39 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2025.354002.11191
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Authors
Nourhan Ashour1; Gihan A. El-Shoubaky2; Marwa M. Saleh2; Nasser Mostafa Mostafa email orcid 3
1Department of Botany and Microbiology, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt.
2Department of Botany and Microbiology, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt.
3Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt.
Abstract
Brown seaweed is the main source of alginates biopolymer, which has been widely employed in various technological fields. The economic importance of seaweed spans multiple industries, offering sustainable solutions that can enhance food security, health, and environmental sustainability. In our study, five abundant brown macroalgal species were collected from Hurghada, Red Sea (Padina boergesenii, Hormophysa cuneiformis, Polycladia myrica, Turbinaria turbinata and Sargassum aquifolium) for alginate extraction and characterization. The alginate yield varies across the different species. T. turbinata produced the highest alginate yield (35.1 ± 1%), while P. boergesenii yielded the least (18.3 ± 0.5%). The alginate molecular structure was characterized using FTIR, TGA and viscosity measurement. The average molecular weight of alginates varies from 9.04 × 105 g/mol for T. turbinata to 1.2 × 105 g/mol for P. boergesenii. There is a direct correlation between the alginate yield and molecular weights. Furthermore, T. turbinata and S. aquifolium species demonstrate a potential economical source for high quality Na-alginates for various ecofriendly applications.
Keywords
Brown macroalgae; Alginate; Yield; Molecular weight; FTIR; Viscosity
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