Bioremediation of Ammonium and Phosphates and their Effect on the Macroalgae Dictyota dichotoma (Hudson) Lamouroux Native to the Red Sea Coast, Egypt | ||
| Egyptian Journal of Botany | ||
| Article 26, Volume 60, Issue 3, December 2020, Pages 671-680 PDF (2.63 M) | ||
| Document Type: Regular issue (Original Article) | ||
| DOI: 10.21608/ejbo.2020.21997.1430 | ||
| Authors | ||
| Amany Madkour1; Sara Rashedy2; Hussein Touliabah* 3 | ||
| 1Marine Pollution Lab. Marine Environment Division, National Institute of Oceanography and Fisheries, Hurghada Branch, Red Sea Province, Egypt | ||
| 2Hydrobiology lab. Marine Environment Division, National Institute of Oceanography and Fisheries, Hurghada Branch, Red Sea Province, Egypt | ||
| 3Botany and Microbiology Department, Faculty of Girls for Science, Education and Arts, Ain Shams University, Cairo, Egypt | ||
| Abstract | ||
| IN LABORATORY experiments for eleven days, the effect of dissolved ammonium and phosphate on the absorption, growth, and nutritional content of Dictyota dichotoma was examined to determine their potential application as a nutrient biofilter. Five combinations of phosphates and ammonium concentration (0.8/8, 2/20, 4/40, 6/60, and 8/80μmol/L) were added to Sterile seawater. Molar phosphorus/ nitrogen ratio was 1:10. Over a 24hrs period, 69.2–99.9% of the available ammonium and 90.7–100% of the available phosphate were taken up by D. dichotoma. The highest specific growth rate was 9.3± 0.2% day-1 at 6/60μmol/L while the lowest was 5.11± 0.3% day-1 at 0μmol/L. On the other hand at 8/80μmol/L the biomass was decreased in the second day of treatment. Total soluble carbohydrate, total soluble protein, and total lipids of the tested D. dichotoma were significantly increased with the increase of PO4-3/NH4+ concentration and greater than their respective initial content. The highest averages of total soluble carbohydrate (TSC) (9.79± 0.45% dry wt.), total soluble protein (TSP) (16.3± 0.32% dry wt.) and total lipid (8± 0.30% dry wt.) were observed at the concentration of 6μmol/L for PO4-3 and 60μmol/L for NH4+. Based on these results, D. dichotoma has a strong absorption capacity for ammonium & phosphates, and as bioremediator in eutrophic environments can be a promising applicant. | ||
| Keywords | ||
| Biomass; Bioremediator; Dictyota dichotoma ; Specific growth rate; Total Soluble Carbohydrate (TSC); Total Soluble Protein (TSP) | ||
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