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The paper presents experience of developing and maintaining a system of radioecological monitoring of freshwater ecosystems in the vicinity of Rooppur Nuclear Power Plant (Bangladesh). Components of freshwater ecosystems in the zone of NPP impact are both very informative for determining the environmental state and very important for conducting economic activities. Therefore, the issue of assessing and predicting quality of freshwater ecosystems in the vicinity of NPP is relevant for ensuring radiation and environmental safety. During the studies, we developed a detailed monitoring program; selected observation points for the state of surface water and groundwater at different distances from Rooppur NPP; determined monitoring objects (water, bottom sediments, higher aquatic vegetation, and fish), list of parameters to be studied, observation regulation, methods, and regulatory and technical support. Among the indicators controlled we considered the following ones: physicochemical properties of water and bottom sediments; radionuclide content of components of freshwater ecosystems including natural (40K, 226Ra, and 232Th) and technogenic (90Sr, 137Cs, and 3H) radionuclides; and content of 19 heavy metals, as well as chemical pollutants. Monitoring studies were conducted in 2014–2017, considering climatic peculiarities of the region at different periods of the year. Radionuclides in environmental objects were determined by spectrometry and radiochemistry; heavy metals – by atomic absorption and plasma emission analysis methods. It was established that higher aquatic vegetation in the Padma River is found not in all seasons. In December, it was almost absent. The maximum species diversity was registered in June. Differences between surface water and groundwater in the vicinity of Rooppur NPP were distinguished for several physical and chemical characteristics. Values of drinking water total mineralization and hardness were higher than that of surface water by 2–3 times. This is due to Padma River water composition, the basis of which is meltwater and rainwater. Organic pollutants content in surface water and groundwater was below detection limits or at minimum ones (benzopyrene – less than 0.01 μg·L−1; phenols – 1.3–3.5 μg·L−1; and petroleum products – 0.01–0.043 mg·L−1). Activity concentration of 137Cs in Padma River water did not exceed 0.18 Bq·L−1 (with a mean of 0.07 Bq·L−1) during the observation period. The content of 90Sr was 0.02–0.12 Bq·L−1, and the concentration of 3H varied in the range of 0.8–2.1 Bq·L−1. Mean specific activity of 90Sr in bottom sediments was 0.5–1.8 Bq·kg−1, and 137Cs – 0.8–2.1 Bq·kg−1. Specific activity of 3H in bottom sediments was less than 3 Bq·kg−1, except for 3 samples in 2017 (12–30 Bq·kg−1), which was most likely due to a local pollution. Specific activity of 90Sr in higher aquatic vegetation was 0.4–3.9 Bq·kg−1, and 137Cs – 0.4–1.0 Bq·kg−1. In drinking water, activity concentrations of radionuclides were as follows: 137Cs – 0.03–0.27 Bq·L−1; 90Sr – 0.01–0.16 Bq·L−1; 3H – 0.4–1.2 Bq·L−1. Specific activity of 90Sr in fish was 0.02–1.6 Bq·kg−1.The content of 137Cs in fish was 0.26–0.3 Bq·kg−1. Analysis of monitoring data on heavy metal levels in components of freshwater ecosystems in the vicinity of Rooppur NPP showed that for a number of elements their increased concentrations were recorded, most of which belong to monsoon season. In Padma River surface water, a repeating increase in As, Cd, Mn, and Al concentrations was noted, and in bottom sediments – an increase in As, Cd, Ni, Co, and Zn content, which was associated with anthropogenic impact and increasing runoff of pollutants during monsoon rains. Repeatedly increased As and Mn concentrations were noted in drinking water of Rooppur NPP 30-km zone. In separate samples, there was an increase in Fe and Al content. This might be due to both natural peculiarities of the region (relatively high As content in aquifers) and the state of water supply systems. Obtained results and developed network of radioecological monitoring of freshwater ecosystems would make it possible to register a change in the situation and to identify impact of Rooppur NPP operation on human population and the environment.
СП 151.13330.2012 Инженерные изыскания для размещения, проектирования и строительства АЭС. Ч. II. Инженерные изыскания для разработки проектной и рабочей документации и сопровождения строительства. Москва, 2013. 155 с. [SP 151.13330.2012 Inzhenernye izyskaniya dlya razmeshcheniya, proektirovaniya i stroitel’stva AES. Ch. II. Inzhenernye izyskaniya dlya razrabotki proektnoi i rabochei dokumentatsii i soprovozhdeniya stroitel’stva. Moscow, 2013, 155 p. (in Russ.)]
СП 184.108.40.20612-10 Основные санитарные правила обеспечения радиационной безопасности (ОСПОРБ 99/2010). Санитарные правила и нормативы. Москва, 2010. 83 с. [SP 220.127.116.1112-10 Osnovnye sanitarnye pravila obespecheniya radiatsionnoi bezopasnosti (OSPORB 99/2010). Sanitarnye pravila i normativy. Moscow, 2010, 83 p. (in Russ.)]
2018 Edition of the Drinking Water Standards and Health Advisories Tables. Washington DC, USA : U. S. Environmental Protection Agency, 2018, 12 p.
Afrin R., Mia M. Y., Akter S. Investigation of heavy metals (Pb, Cd, Cr, Cu, Hg, and Fe) of the Turag River in Bangladesh. Journal of Environmental Science and Natural Resources, 2014, vol. 7, no. 2, pp. 133–136. https://doi.org/10.3329/jesnr.v7i2.22221
Ahmed M. K., Ahamed S., Rahman S., Haque M. R., Islam M. M. Heavy metals concentration in water, sediments and their bioaccumulations in some freshwater fishes and mussel in Dhaleshwari River, Bangladesh. Terrestrial and Aquatic Environmental Toxicology, 2009, vol. 3, no. 1, pp. 33–41.
Ahmed M. K., Islam S., Rahman S., Haque M. R., Islam M. M. Heavy metals in water, sediment and some fishes of Buriganga River, Bangladesh. International Journal of Environmental Research, 2010, vol. 4, iss. 2, pp. 321–332. https://dx.doi.org/10.22059/ijer.2010.24
Ahmed M. K., Shaheen N., Islam M. S., Al-Mamun M. H., Islam S., Islam M. M., Kundu G. K., Bhattacharjee L. A comprehensive assessment of arsenic in commonly consumed foodstuffs to evaluate the potential health risk in Bangladesh. Science of the Total Environment, 2016, vol. 544, pp. 125–133. https://doi.org/10.1016/j.scitotenv.2015.11.133
Ali M. M., Ali M. L., Islam S., Rahman Z. Preliminary assessment of heavy metals in water and sediment of Karnaphuli River, Bangladesh. Environmental Nanotechnology, Monitoring & Management, 2016, vol. 5, pp. 27–35. https://doi.org/10.1016/j.enmm.2016.01.002
Arefin M. T., Rahman M. M., Wahid-U-Zzaman M., Kim J.-E. Heavy metal contamination in surface water used for irrigation: Functional assessment of the Turag River in Bangladesh. Journal of Applied Biological Chemistry, 2016, vol. 59, iss. 1, pp. 83–90. https://doi.org/10.3839/jabc.2016.015
Bai L., Liu X.-L., Hu J., Li J., Wang Z.-L., Han G., Li S.-L., Liu C.-Q. Heavy metal accumulation in common aquatic plants in rivers and lakes in the Taihu basin. International Journal of Environmental Research and Public Health, 2018, vol. 15, no. 12, art. 2857 (12 p). https://doi.org/10.3390/ijerph15122857
Bakali B., Mia M. Y., Zakir H. M. Water quality evaluation of Tongi area in Bangladesh: An impact of industrialization. Journal of Chemical Biological and Physical Sciences, 2014, vol. 4, no. 2, pp. 1735–1752.
Bhuiyan M. A. H., Suruvi N. I., Dampare S. B., Islam M. A., Quraishi S. B., Ganyaglo S., Suzuki S. Investigation of the possible sources of heavy metal contamination in lagoon and canal water in the tannery industrial area in Dhaka, Bangladesh. Environmental Monitoring and Assessment, 2011, vol. 175, iss. 1–4, pp. 633–649. https://doi.org/10.1007/s10661-010-1557-6
Chakraborty S. R., Mollah A. S., Begum A., Ahmad G. U. Radioactivity in drinking water of Bangladesh. Japanese Journal of Health Physics, 2005, vol. 40, no. 2, pp. 191–201. https://doi.org/10.5453/jhps.40.191
Codex Alimentarius. General Standard for Contaminants and Toxins in Food and Feed (CODEX STAN 193-1995). Adopted in 1995. Revised in 1997, 2006, 2008, 2009. Amendment 2010, 2012, 2013, 2014, 2015. FAO/WHO, 2015, 59 p.
Fendorf S., Michael H. A., van Geen A. Spatial and temporal variations of groundwater arsenic in South and Southeast Asia. Science, 2010, vol. 328, iss. 5982, pp. 1123–1127. https://doi.org/10.1126/science.1172974
Fourth National Report to the Convention on Biological Diversity: Biodiversity National Assessment and Programme of Action 2020 / Ministry of Environment and Forests, Government of Bangladesh, Dhaka. Bangladesh, 2010, 112 p.
Guidelines for Drinking-water Quality: Fourth Edition Incorporating First Addendum. Geneva : World Health Organization, 2017, 541 p.
Islam M. S., Ahmed M. K., Raknuzzaman M., Mamun M. H. A., Islam M. K. Heavy metal pollution in surface water and sediment: A preliminary assessment of an urban river in a developing country. Ecological Indicators, 2015, vol. 48, pp. 282–291. https://doi.org/10.1016/j.ecolind.2014.08.016
Islam M. Z., Noori A., Islam R., Azim M. A., Quraishi S. B. Assessment of the contamination of trace metal in Balu River water, Bangladesh. Journal of Environmental Chemistry and Ecotoxicology, 2012, vol. 4, no. 14, pp. 242–249.
Islam S. N., Singh S., Shaheed H., Wei S. Settlement relocations in the char-lands of Padma River basin in Ganges delta, Bangladesh. Frontiers of Earth Science in China, 2010, vol. 4, iss. 4, pp. 393–402. https://doi.org/10.1007/s11707-010-0122-5
Kabata-Pendias A. Trace Elements in Soils and Plants. 4th edition. Boca Raton, FL, USA : CRC Press ; Taylor & Francis Group, 2010, 548 p. https://doi.org/10.1201/b10158
Kaisar M. I., Adhikary R. K., Dutta M., Bhovmik S. Diversity of aquatic weeds of Noakhali Sadar in Bangladesh. American Journal of Scientific and Industrial Research, 2016, vol. 7, no. 5, pp. 117−128.
Karim R., Karim M. E., Muhammad-Sukki F., Abu-Bakar S. H., Bani N. A., Munir A. B., Kabir A. I., Ardila-Rey J. A., Mas’ud A. A. Nuclear energy development in Bangladesh: A study of opportunities and challenges. Energies, 2018, vol. 11, no. 7, art. 1672 (15 p.). https://doi.org/10.3390/en11071672
Kawser A., Baki M. A., Kundu G. K., Islam S., Islam M., Hossain M. Human health risks from heavy metals in fish of Buriganga River, Bangladesh. SpringerPlus, 2016, vol. 5, art. 1697 (12 p.). https://doi.org/10.1186/s40064-016-3357-0
Khalil I., Majumder R. K., Kabir Z., Deeba F., Khan N. I., Ali I., Paul D., Haydar A., Islam S. M. A. Assessment of natural radioactivity levels and identification of minerals in Brahmaputra (Jamuna) River sand and sediment, Bangladesh. Radiation Protection and Environment, 2016, vol. 39, iss. 4, pp. 204–211. https://doi.org/10.4103/0972-0464.199980
Mohiuddin K. M., Ogawa Y., Zakir H. M., Otomo K., Shikazono N. Heavy metals contamination in water and sediments of an urban river in a developing country. International Journal of Environmental Science & Technology, 2011, vol. 8, iss. 4, pp. 723–736. https://doi.org/10.1007/BF03326257
Molla M. A., Saha N., Salam S. A., Rakib-uz-Zaman M. Surface and groundwater quality assessment based on multivariate statistical techniques in the vicinity of Mohanpur, Bangladesh. International Journal of Environmental Health Engineering, 2015, vol. 4, iss. 1, art. 18 (9 p.). https://doi.org/10.4103/2277-9183.157717
Mollah A. S., Chakraborty S. R. Radioactivity and radiation levels in and around the proposed nuclear power plant site at Rooppur. Japanese Journal of Health Physics, 2009, vol. 44, iss. 4, pp. 408–413. https://doi.org/10.5453/jhps.44.408
National Sustainable Development Strategy (2010–2021) / General Economics Division, Planning Commission ; Government of the People’s Republic of Bangladesh. Bangladesh, 2013, 144 p.
Nauen C. E. Compilation of Legal Limits for Hazardous Substances in Fish and Fishery Products. Rome : FAO, 1983, 102 p. (FAO Fisheries Circular ; no. 764).
Pescod M. B. Wastewater Treatment and Use in Agriculture – FAO Irrigation and Drainage Paper 47. Rome : FAO, 1992, 156 p.
Pravin U. S., Trivedi P., Ravindra M. M. Sediment heavy metal contaminants in Vasai Creek of Mumbai: Pollution impacts. American Journal of Chemistry, 2012, vol. 2, no. 3, pp. 171–180. https://doi.org/10.5923/j.chemistry.20120203.13
Programmes and Systems for Source and Environmental Radiation Monitoring. Vienna : International Atomic Energy Agency, 2010, 232 p. (Safety Reports Series ; no. 64).
Rahman M. A., Huda M. Study of the seasonal variations in physicochemical and biological aspects of the Padma River at Paturia Ghat, Manikganj. Jahangirnagar University Environmental Bulletin, 2012, vol. 1, pp. 55–66. https://doi.org/10.3329/jueb.v1i0.14548
Saha N., Zaman M. Concentration of selected toxic metals in groundwater and some cereals grown in Shibganj area of Chapai Nawabganj, Rajshahi, Bangladesh. Current Science, 2011, vol. 101, no. 3, pp. 427–431.
Sharif M. I., Hannan M. A. Guide to the Environmental Conservation Act 1995 and Rules 1997 / Bangladesh Centre for Advanced Studies (BCAS). Dhaka, Bangladesh, 1999.
Shikazono N., Tatewaki K., Mohiuddin K. M., Nakano T., Zakir H. M. Sources, spatial variation, and speciation of heavy metals in sediments of the Tamagawa River in Central Japan. Environmental Geochemistry and Health, 2012, vol. 34, no. 1, pp. 13–26. https://doi.org/10.1007/s10653-011-9409-z
Zakir H. M., Rahman M. M., Rahman A., Ahmed I., Hossain M. A. Heavy metals and major ionic pollution assessment in waters of midstream of the River Karatoa in Bangladesh. Journal of Environmental Science and Natural Resources, 2012, vol. 5, no. 2, pp. 149–160.