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The article presents the results of large-scale studies of the content and distribution of natural and man-made radionuclides in the sediments of the rivers flowing into the Dnieper-Bug estuary. The article also presents the results of the granulometric analysis of the surveyed water bodies. The data about natural radioactive elements in the sedime...
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The investigation aims to study the source and concentration of polycyclic aromatic hydrocarbon (PAHs) fractions in the surface sediments of selected estuaries of the southwest coast of Kerala India. The concentration of PAHs ranged from 0.47 to 126.64 ng/g. The estuarine sediments were enriched by HMW-PAHs and they are occupied nearly 93.76 % of t...
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... The site near Lake Tuzkan in the Jizzakh region, located 50-80 km from the Zhetysay district of the Turkestan region of the Republic of Kazakhstan, was chosen as the priority site for the construction of the station. In accordance with the IAEA radiation safety requirements and the legislation of the Republic of Kazakhstan, radiation monitoring should be carried out around nuclear power facilities [1][2][3]. ...
The article describes the radiobiological state of open reservoirs, drinking water in the settlements of the Turkestan region, which are potentially affected by the nuclear power plant under construction in Uzbekistan, as well as some biota objects that can serve as indicator organisms. The relevance is due to the fact that the settlements of the Turkestan region of the Republic of Kazakhstan, located near the border with Uzbekistan, fall under the potential impact of the future nuclear power plant. The objects of the study were samples of drinking water from 5 settlements, bottom sediments and hydrobionts (pike-perch - Sander lucioperca), carp (Cyprinus carpi), lake frog (Pelophylax ridibundus), water samples taken from open reservoirs of the Turkestan region. On the basis of an accredited the test laboratory of radiochemistry and radiospectrometry of the Institute of Radiobiology and Radiation Protection conducted tests on the content of radionuclides. The results obtained on the content of radionuclides at the stage of "zero background" before the construction of the nuclear power plant are generally within the normal range, with the exception of samples of drinking water from the village of Zhyly-su , where the total alpha activity exceeds 1.5 times the maximum allowable concentration. The results obtained will allow us to estimate the probable dose loads of the population from the intake of radionuclides through food chains and various scenarios. Data on the content of radionuclides in open water bodies and in drinking water will be used as one of the criteria, for a full assessment of the “zero pho on the territories of the Turkestan region.
... The implementation of one of the state environmental policy tasks is to ensure the protection, reproduction and rational use of water resources [6], is possible only if the water quality of the water body is rationing. The quality of water resources is an important component of a highquality environment, which is ensured by establishing a set of acceptable values for indicators of its composition and properties [7,8]. Therefore, special attention and relevance in the process of teaching ecologists acquire practical works of the environmental assessment of the state of water bodies through lengthy and cumbersome mathematical calculations. ...
Research goal of the paper is the demonstration of computer technology integration in the modern educational process of teaching ecologists in practical classes on assessing the quality of water in water bodies, containing mathematical calculations. The use of modern information computer technologies in education will effectively contribute to the acquisition of a range of knowledge and skills on methods for water quality assessing in the field of water use and protection of water resources. The ability to use ICT will provide the ecologists with the ability to respond quickly to changes in the environment and make effective decisions in environmental management in future production activities.
... The radionuclides concentration in sediments will provide useful information regarding the status of environmental and geochemical pollution. Accordingly, the distribution and concentration of radionuclides in river sediments have been widely investigated in different parts of the world (Alokhina and Gudzenko 2021;de Carvalho et al. 2016;Fallah et al. 2019;Semizhon et al. 2010;Suresh et al. 2011;Wang et al. 2016;Yakovlev et al. 2020;Abbasi & Mirekhtiary 2019Abbasi et al. 2022). Research of Semizhon et al. (2010) investigated the radioactive contamination of sediments at the Yenisei River from 1999 to 2006 due to the discharges from the Krasnoyarsk Mining and Chemical Industrial Complex (KMCIC), indicated that the levels of artificial radionuclides ( 137 Cs, 60 Co, 152 Eu, and 241 Am) were dependent on the distance downstream from KMCIC. ...
... The report of Yakovlev et al. (2020) revealed that several patterns of radionuclide accumulation ( 238 U, 232 Th, 40 K, and 137 Cs) in the sediments of Zolotitsa River and its tributaries depend on the physicochemical parameters of river sediments. Recently, Alokhina and Gudzenko (2021) investigated the distribution of radionuclides in modern sediments of the rivers flowing into the Dneiper-Bug estuary and indicated that the presence of natural radionuclides in river sediment was from geological, hydrological and chemical processes. In general, research investigations conducted so far showed that the concentration and distribution of radionuclides in river sediments vary from place to place and depend on the clay mineral, the physicochemical parameters, such as geological, hydrological and chemical processes and the distance from radioactive sources. ...
... The radionuclides concentrations in river sediments in this study are comparable to those in river sediment samples from different countries, as shown in Table 5. It can be seen that the concentrations of 226 Ra and 232 Th in sediment samples in this study are higher than those in almost all the river sediments that have been listed in Table 5 (Alokhina and Gudzenko 2021;Cukrov et al. 2009;de Carvalho et al. 2016;Ergül et al. 2013;Yakovlev et al. 2020), excluding Juru river, Penang (Mei-Wo et al. 2020). Similarly, the 40 K concentration in this study is also higher than that in almost river sediments presented in this table, except for sediments in Wei River, China (Lu et al. 2008) and Palar river, India (Ramasamy et al. 2006). ...
The Red River is one of the largest rivers that plays an important role in the economic development of North Vietnam. There are many radionuclides bearing rare earth, uranium ore mines, mining industrial zones and magma intrusive formations along this river. The contamination and accumulation of radionuclides could exist at high concentration in surface sediments of this river. Thus, the present investigation aims to study the activity concentrations of ²²⁶Ra, ²³²Th (²²⁸Ra), ⁴⁰K, and ¹³⁷Cs in Red River surface sediments. Thirty sediment samples were collected, and their activity concentration was calculated using high-purity germanium gamma-ray detector. The observed results ranged from 51.0 ± 2.1 to 73.6 ± 3.7 for ²²⁶Ra, 71.4 ± 3.6 to 103 ± 5.2 for ²³²Th, 507 ± 24.0 to 846 ± 42.3 for ⁴⁰K, and ND (not detected) to 1.33 ± 0.06 Bq/kg for ¹³⁷Cs, respectively. In general, the natural radionuclides concentration of ²²⁶Ra, ²³²Th (²²⁸Ra), and ⁴⁰K is higher than the average world average values. This indicated that the natural radionuclides could contribute from similar and principal sources surrounding the upstream of Lao Cai where distributed uranium ore mines, radionuclide bearing rare earth mines, mining industrial zones and intrusive formations. Regarding the radiological hazard assessment, results of the indices computed such as absorbed gamma dose rate (D), the excess lifetime cancer risk (ELCR), and the annual effective dose equivalent (AEDE) were nearly two times higher than world average values.
Specific activity ratios were used to establish if the researchers successfully equilibrated their samples before gamma spectrometry analysis. The use of 226 Ra/ 234 Th and 214 Bi/ 214 Pb ratios in the 238 U decay series, as well as 208 Tl/ 228 Ac, 212 Bi/ 212 Pb, and 212 Pb/ 232 Th ratios in the 232 Th decay series, contributed to the confirmation of radioactive equilibrium. Some ratios in both series imply radioactive equilibrium, while others indicate radioactive disequilibrium. The curves for secular and transient equilibrium were generated using mathematical models. According to this study, some gamma spectrometry analyses are performed prior to sample equilibration, which may result in inaccurate contamination conclusions.
Several anthropogenic activities produce radioactive materials into the environment. According to reports, exposure to high concentrations of radioactive elements such as potassium (40K), uranium (238U and 235U), and thorium (232Th) poses serious health concerns. The scarcity of reviews addressing the occurrence/sources, distribution, and remedial solutions of radioactive contamination in the ecosystems has fueled data collection for this bibliometric survey. In rivers and potable water, reports show that several parts of Europe and Asia have recorded radionuclide concentrations much higher than the permissible level of 1 Bq/L. According to various investigations, activity concentrations of gamma-emitting radioactive elements discovered in soils are higher than the global average crustal values, especially around mining activities. Adsorption technique is the most prevalent remedial method for decontaminating radiochemically polluted sites. However, there is a need to investigate integrated approaches/combination techniques. Although complete radionuclide decontamination utilizing the various technologies is feasible, future research should focus on cost-effectiveness, waste minimization, sustainability, and rapid radionuclide decontamination. Radioactive materials can be harnessed as fuel for nuclear power generation to meet worldwide energy demand. However, proper infrastructure must be put in place to prevent catastrophic disasters
