Mostafa, N., Ashour, N., Saleh, M., El-Shoubaky, G. (2025). Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt. test, (), -. doi: 10.21608/ejchem.2025.354002.11191
Nasser Mostafa Mostafa; Nourhan Ashour; Marwa M. Saleh; Gihan A. El-Shoubaky. "Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt". test, , , 2025, -. doi: 10.21608/ejchem.2025.354002.11191
Mostafa, N., Ashour, N., Saleh, M., El-Shoubaky, G. (2025). 'Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt', test, (), pp. -. doi: 10.21608/ejchem.2025.354002.11191
Mostafa, N., Ashour, N., Saleh, M., El-Shoubaky, G. Extraction and Characterization of Alginate Biopolymer from Abundant Brown Seaweeds, Hurghada, Red Sea, Egypt. test, 2025; (): -. 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
Articles in Press, Accepted Manuscript, Available Online from 05 March 2025
Document Type: Original Article
DOI: 10.21608/ejchem.2025.354002.11191
Authors
Nasser Mostafa Mostafa* 1; Nourhan Ashour2; Marwa M. Saleh3; Gihan A. El-Shoubaky3
1Department of Chemistry, 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 Botany and Microbiology, 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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