Euphrates River Pollution Acute and Chronic Toxicity Revealed by Bioassays

Murooj Abbas Buhlool  Al Ghizzi

Murooj Abbas Buhlool Al Ghizzi Department of Biology, College of Sciences, University of Thi Qar, Nasiriyah, Iraq

Keywords: Assessment, Toxicity of Water, Euphrates River, Nasiriyah City, Iraq

Abstract

Bioassays are critical for assessing water pollution and its risks to ecosystems. This study evaluated the pollution of the Euphrates River in Nasiriyah during winter and spring, focusing on three stations: Sharif (entrance to the city), post-thermal energy, and Sedinawiyah (sewage disposal). Chlorella vulgaris growth rates were analyzed in river water samples over 24, 48, and 96 hours. The highest growth rate deviation was observed at station 2 in spring (91.0%) and station 3 in winter (66.0%). Results indicated varying levels of water toxicity, ranging from acute to chronic, influenced by human activities and seasonal changes. These findings highlight the significant impact of pollution on the Euphrates River, emphasizing the need for continuous monitoring and mitigation strategies.

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References

M. K. Al-Ajrash, "Environmental Assessment of Pollution at the Nasiriyah Thermal Power Station," M.S. thesis, College of Arts, Dhi Qar Univ., 2020, p. 84.

H. A. Al-Saadi, N. Q. Al-Daham, and L. A. J. Al-Hussan, *Aquatic Ecology*, Basra, Iraq: Mosul University Press, 1986, p. 425.

M. M. Sharqi, "Pollution of the Euphrates River in the City of Ramadi: Causes and Responsibilities," Dept. Life Sci., Coll. Educ. Girls, Anbar Univ., Ramadi, Iraq, 2022.

Al-Dosari, "Study of Some Bacterial Contaminants in the Water of the Euphrates River," *Iraq Academic Scientist Journals*, 2006.

J. Van Der Heever and J. Grobbelaar, "The Use of Algae in Bioassays to Detect the Presence of Toxic Compounds in Natural Waters," 1995.

M. B. Ray et al., "Development of Microalgal Bioassay Based on the Community Level Physiological Profiling (CLPP)," 2016.

D. N. Lerner and R. Harris, "The Relationship Between Land Use and Groundwater Resources and Quality," *Land Use Policy*, vol. 26, no. 3, pp. S265–S273, Dec. 2009, doi: 10.1016/j.landusepol.2009.09.005.

E. N. Bakaeva, "Biological Approaches to Assessing the Ecotoxicological State of Aquatic Ecosystems," *News of Higher Educational Institutions. North Caucasus Region. Natural Sciences.*, no. 1, pp. 72-83, 2015.

E. N. Bakaeva, N. A. Ignatova, and G. G. Chernikova, *Assessment of the Toxicity of Land Surface Waters Using Biotesting Using Chlorophyll a*, Roshydromet, Federal State Budgetary Institution "GHI", Rostov-on-Don, Russia, 2014, p. 23.

T. A. Ziehl and A. Schmitt, "Sediment Quality Assessment of Flowing Waters in South-West Germany Using Acute and Chronic Bioassays," *Aquatic Ecosystem Health & Management*, vol. 3, no. 3, pp. 347-357, 2000.

Azizullah et al., "Fast Bioassessment of Wastewater and Surface Water Quality Using Freshwater Flagellate Euglena Gracilis—A Case Study from Pakistan," *Journal of Applied Phycology*, vol. 26, pp. 421-431, 2014.

U. Schreiber et al., "New Type of Dual-Channel PAM Chlorophyll Fluorometer for Highly Sensitive Water Toxicity Biotests," *Photosynthesis Research*, vol. 74, no. 3, pp. 317-330, 2002.

E. R. Palm et al., "Sinapis Alba L. and Triticum Aestivum L. as Biotest Model Species for Evaluating Municipal Solid Waste Leachate Toxicity," *Journal of Environmental Management*, vol. 302, p. 114012, 2022.

Z. Romanowska-Duda and M. Tarczyńska, "The Influence of Microcystin-LR and Hepatotoxic Cyanobacterial Extract on the Water Plant Spirodela Oligorrhiza," *Environmental Toxicology: An International Journal*, vol. 17, no. 5, pp. 434-440, 2002.

I. I. Tomilina, R. A. Lozhkina, and M. V. Gapeeva, "Toxicity of Bottom Sediments of the Rybinsk Reservoir According to Long-term Biotesting Data: Report 1. Toxicological Studies," *Inland Water Biology*, vol. 14, pp. 777-787, 2021.

S. Szklarek et al., "Comparing Ecotoxicological and Physicochemical Indicators of Municipal Wastewater Effluent and River Water Quality in a Baltic Sea Catchment in Poland," *Ecological Indicators*, vol. 126, p. 107611, 2021.

M. N. Saksonov, A. E. Balayan, and D. I. Stom, "Assessment of Toxicity of Technical Detergents Using Complex of Bioassay Methods," *IOP Conference Series: Earth and Environmental Science*, vol. 272, no. 2, 2019.