Hanan M. Khairy

National Institute of Oceanography and Fisheries Egypt.

Abstract Title: Seaweed Liquid Extract for Sustainable Solutions for Phycobioremediation, Plant Germination, and Feed Additive for Oithona nana (Marine Invertebrate Copepod)

Biography:

1 - B. SC. In Botany, with grade excellent, Faculty of Science, Tanta University, Egypt (1987). 2 - M. SC. In Botany (Algae), Faculty of Science, Tanta University, Egypt (1995). 3 - Ph. D. In Botany (Algae), Faculty of Science, Tanta University, Egypt (2002). 5- Associate Prof. in Hydrobiology, aquatic plant (2010). 6- Prof. in Hydrobiology (2016), and Head of Hydrobiology Lab. till now. Study the nutritional values of micro and macro algal species to fish larvae under any stress conditions such as deficiency of the nutrient conditions in the culture medium, and also study the production of bioactive compounds and cyanotoxins from some algal species.

Research Interest:

Several studies have shown the importance of using seaweed liquid extract (True-Algae-Max, TAM®) as a fish feed additive, and fish-water conditioner. In addition, TAM® has demonstrated significant growth improvement when used as a plant growth biostimulant. This study investigates whether seaweed liquid extract (TAM®) can achieve good results in new experimental fields such as chromium remediation, plant germination, and live feed supplementation for marine invertebrate Copepod (Oithona nana). In this study, several doses of TAM® were tested, for the first time, for their impact on the remediation of chromium (Cr6+) ions from aqueous solutions and as an aqua feed additive for marine copepods (Oithona nana). The most important factors influencing the removal (%) of Cr6+, identified using a two-level Plackett–Burman factorial design, were selected for additional optimization utilizing a rotatable central composite design. The maximum adsorption of Cr6+ was 93.65% under ideal operating circumstances, which included an initial Cr6+ concentration of 60 mg L-1, a temperature of 25 °C, a pH of 3, a TAM®biomass of 0.05 g, and a contact time of 60 min at agitation conditions. The results of the germination experiment revealed that the highest significant increase in seed germination was achieved using a TAM® level of 0.30 mg mL−1 with V. faba (88%) and 0.03 mg mL−1 with T. foenum-graecum (96.6%). In conclusion, it is shown that TAM® is a feasible, efficient, and sustainable solution for biodegradable adsorbent for the Cr6+ from aqueous solution, enhances plant seed germination and root length, and is a novel feed additive for marine copepod O. nana, especially in marine invertebrate hatcheries.