Figure 1 - uploaded by Muharrem Ince
Content may be subject to copyright.
Source publication
The aim of this study is to investigate the concentrations of U, Th, V, Mo, and Zr in natural waters taken from Turkey. Among these water species, Lake Van is the largest soda lake and the fourth largest closed basin on Earth. The water samples were collected from 51 locations between 2008 and 2009. The inductively coupled plasma-MS was used for de...
Contexts in source publication
Context 1
... studied water samples taken from different locations in Turkey ( Fig. 1) can be divided into four groups: lake, river, sea, and stream waters. Among these water species, Lake Van is the largest soda lake as well as the fourth largest closed basin on Earth. Lake Hazar is on the East Anatolian Fault Zone. Some of the studied river waters flow from Turkey to other countries. The Black Sea is the largest ...
Context 2
... as well as the fourth largest closed basin on Earth. Lake Hazar is on the East Anatolian Fault Zone. Some of the studied river waters flow from Turkey to other countries. The Black Sea is the largest anoxic silled basin in the world. The Lake water samples were taken from different sites in coast of the Lakes Van and Hazar in east of Turkey ( Fig. 1). When necessary, water samples (1.0 L) were filtered through a 0.45-mm membrane filter to separate insoluble materials. Samples of lake waters were collected between September 2008 and October 2009 from 30 sites at coast of Lake Van ( Fig. 2) and 10 sites at Coast of Lake Hazar depending on their size. Further, water samples were ...
Citations
... Because the sensitivity achieved is lower than the permitted U levels in natural waters, the ground, river and lake water samples can be subjected to uranium analysis by employing the developed preconcentration method. Yaman et al. (2011) have reported U concentrations in ranges of 37-110 µg L −1 in Van Lake Water, 0.09-0.18 µg L −1 in water of Dicle River, and 2.0-4.0 µg L −1 in seawater from Black Sea and Mediterranean Sea, using ICP-MS (Yaman et al. 2011). ...
... Yaman et al. (2011) have reported U concentrations in ranges of 37-110 µg L −1 in Van Lake Water, 0.09-0.18 µg L −1 in water of Dicle River, and 2.0-4.0 µg L −1 in seawater from Black Sea and Mediterranean Sea, using ICP-MS (Yaman et al. 2011). Metilda et al. (2004 determined 1.59 µg L −1 U in seawater from southwestern coast of India using ion-imprinted polymer and Arsenazo III spectrophotometric method (Metilda et al. 2004). ...
This study aims to synthesize and characterize an economical and ecological adsorbent with high adsorption capacity. For this purpose, the peanut shells (Pistacia vera L.) were modified chemically. After the synthesis of activated carbon (AC), the optimum conditions for enrichment steps were performed using parameters: pH and contact time for uranium in the model solutions. The measurements were carried out by inductively coupled plasma-mass spectrometry (ICP-MS). From the shapes of the BET isotherms, the AC obtained exhibits type I. The study indicated that the surface area and total pore volume of the AC were found to be 679.9 m² g⁻¹ and 0.31 cc g⁻¹, respectively. The adsorption capacity was found to be 260 mg g⁻¹. The optimum pH was found to be 6.0 for enrichment using the AC obtained by sulfuric acid as a chemical-modifier. The optimized method was applied to enrichment of U at ppb levels in the model solutions.
... There are many studies in the literature where NORM concentrations are evaluated as a geological parameter in regions with different geological structures (Abd et al., 2019;Hilal and Borai, 2018;Özmen et al., 2014;Yasmin et al., 2018;Bal et al., 2015;Karakaya et al., 2017;Karakaya et al., 2015;Kuluöztürk and Doğru, 2015;Kuluöztürk et al., 2017). Studies are carried out to reveal regional radioactivity changes or to determine radioactivity parameters of a particular geological content (soil, water, sediment, mineral content, mineral, and building materials, etc.) (Abd et al., 2019;Abdel-Karim et al., 2016;Al-baidhani et al., 2019;Ballesteros et al., 2008;Bolat et al., 2017;Bouhila and Benrachi, 2017;Boz et al., 2015;Çetin, 2016;Çetin et al., 2016;Coşkun and Çetin, 2016;Eldougdoug et al., 2018;Günay and Eke, 2019;Günoğlu and Seçkiner, 2018;Hassan et al., 1997;Kayakökü and Doğru, 2017;Kolo et al., 2019;Koray et al., 2017;Papadopoulos, 2019;Papadopoulos et al., 2016;Ramasamy et al., 2015;Xinwei and Xiaolan, 2006;Yaman et al., 2011;Yasmin et al., 2018). 238 U and 232 Th decay chain members and 40 K are the dominant sources of natural gamma radioactivity (UNSCEAR, 2000). ...
Natural gamma radioisotope activity concentration levels in beach sands in the Bitlis region of Lake Van, in eastern Turkey, were determined using an HPGe detector. A total of 15 different beach sand samples were collected from Ahlat, Adilcevaz, and Tatvan shoreline regions, and then 226Ra, 232Th, 40K, and 137Cs radioisotope activity concentrations were measured. Mean values of gamma emissions for each radioisotope were determined as 58.78, 65.89, 1590.25, and 4.84 Bq kg−1 for 226Ra, 232Th, 40K, and 137Cs, respectively. Mean radium equivalent activity, absorbed gamma dose rate, annual effective dose, and external hazard index values were calculated as 275.45 Bq kg−1, 135.41 nGy h−1, 0.17 mSv year−1, and 0.74, respectively.
... Fırat University of Turkey, collected total 30 surface water samples from Lake Van and other samples from the neighbouring lakes and rivers in Eastern Anatolia in order to determine their environmental pollutions (Yaman et al., 2011). They have found that the Lake Van surface waters have dissolved mean 76ppb uranium concentration which is 55 times greater than mean sea water concentration. ...
... Greatest soda lake of the World is Lake Van, has various uranium resources and probable thick sedimentary uranium thorium deposites in its Tatvan sub-basin. Its differences from the other soda lakes are as follows: 1) it is calculated that total 50.000tons of dissolved uranium element exits within lake Van waters (Yaman et al., 2011), 2) the most important and different origin of uranium -thorium elements and tritium gas in Tatvan sub-basin is mantle derived, basement surged radiogenic subaqueous hydrothermal emanations which are still active, 3) Total maximum 580m thick unconsolidated Tatvan basal sediments would probably contain some rich reserves of sedimentary authigenic uraniumthorium deposites, 4) Volume of lake Van is many times greater than Eastern and Western Mongolia soda lakes, although their uranium concentrations are higher due to actual higher surface evaporations (Yaman et al., 2011). ...
... Greatest soda lake of the World is Lake Van, has various uranium resources and probable thick sedimentary uranium thorium deposites in its Tatvan sub-basin. Its differences from the other soda lakes are as follows: 1) it is calculated that total 50.000tons of dissolved uranium element exits within lake Van waters (Yaman et al., 2011), 2) the most important and different origin of uranium -thorium elements and tritium gas in Tatvan sub-basin is mantle derived, basement surged radiogenic subaqueous hydrothermal emanations which are still active, 3) Total maximum 580m thick unconsolidated Tatvan basal sediments would probably contain some rich reserves of sedimentary authigenic uraniumthorium deposites, 4) Volume of lake Van is many times greater than Eastern and Western Mongolia soda lakes, although their uranium concentrations are higher due to actual higher surface evaporations (Yaman et al., 2011). ...
Purpose of this study is to prove most probable existence of economical U-Th mineralisations within Tatvan Basin which have been hidden among foreign international research project manuscripts of Lake Van and to inform the importance of national exploration studies. Lake Van is a pull-apart basin formed within Quaternary Muş-Zagros suture zone with right lateral movement. Calculations on heat transfer below the Tatvan Basin indicate that a constant heat flow is about fourty times the continental average which have been only reported from some oceanic ridges. Data indicate the heat source below Tatvan Basin bottom represents a steadily collapsing cauldron subsidence of Nemrut volcano’s magma chamber. Lake Van surface water has mean 76ppb dissolved uranium content of hyrothermal and authigenic origin. It is calculated that there is at least 50.000 tons of dissolved uranium exists in the Lake Van waters. Ultimate deposition of U-Th mineralisation within euxinic Tatvan Basin have been expected to be a continuous process during geologic history of Lake Van as long as uranium resources remain and its NaHCO3 water functions as dissolving agent Sodic Lake Van waters continuously dissolve uranium from 1) high 3He/4He and U-Th containing hydrothermal fluxes of mantle origin coming up through cauldron subsidence faults of Tatvan Basin, 2) per-alkaline rhyolitic volcanic ash rain of Nemrut volcanism, 3) Bitlis granitoid Massive basement, 4) repeated authigenic disentegrations of U to (Th and 4He) within the sedimentary deposites of Tatvan Basin through its 600.000 years history. Tatvan Basin is the deepest basin with 450m depth, 300km2 flat area and constant unoxic basal water table undisturbed by currents and has the following verifications for Quaternary U-Th depositions in the unconsolidated porous sediments: 1) organic mass rich levels with reducing microbial activities, 2) evaporitic dolomites deposited during low stand lake levels with high U-Th concentrations, 3) varved, mixed-layered clays with high hectorite content, 4) sub-aquaeous, basic-intermediate volcanic basement intrusions with reducing properties, 5) measured very low redox potentials in basal environment, 6) very high density of U-Th. Drilling core sequence and the gamma ray logs from Ahlat Ridge have been used in the foreign literature published since 1974 until now while the existence or non-existence of uranium has not been mentioned. Gamma ray logs of drilling cores and their pore water analyses from Tatvan Basin were carried out abroad but not published yet. Thus gamma ray logs belonging only to shallow Ahlat Ridge sequence where uranium mineral precipitation is not possible is misleading.
... U(VI) concentrations in Van Lake samples (sampled at two different location) were found as 65.9 ± 5.1 and 70.2 ± 3.5 ng/mL by this method, while they were found as 65.6 ± 4.4 and 70.0 ± 4.2 ng/mL by ICP-OES. The U(VI) concentrations founded were in good agreement with literature value as 37e110 ng/mL (Yaman et al., 2011). They were also spiked with known amount of U(VI). ...
Bioaccumulation, resistance and preconcentration of uranium(VI) by thermotolerant Bacillus vallismortis were investigated in details. The minimum inhibition concentration of (MIC) value of U(VI) was found as 85 mg/L and 15 mg/L in liquid and solid medium, respectively. Furthermore, the effect of various U(VI) concentrations on the growth of bacteria and bioaccumulation on B. vallismortis was examined in the liquid culture media. The growth was not significantly affected in the presence of 1.0, 2.5 and 5.0 mg/L U(VI) up to 72 h. The highest bioaccumulation value at 1 mg/L U(VI) concentration was detected at the 72nd hour (10 mg/g metal/dry bacteria), while the maximum bioaccumulation value at 5 mg/L U(VI) concentration was determined at the 48th hour (50 mg metal/dry bacteria). In addition to these, various concentration of U(VI) on α-amylase production was studied. The α-amylase activities at 0, 1, 2.5 and 5 mg/L U(VI) were found as 3313.2, 3845.2, 3687.1 and 3060.8 U/mg, respectively at 48th. Besides, uranium (VI) ions were preconcentrated with immobilized B. vallismortis onto multiwalled carbon nanotube (MWCNT) and were determined by UV-vis spectrophotometry. The surface macro structure and functionalities of B. vallismortis immobilized onto multiwalled carbon nanotube with and without U(VI) were examined by FT-IR and SEM. The optimum pH and flow rate for the biosorption of U(VI) were 4.0–5.0 and 1.0 mL/min, respectively. The quantitative elution occurred with 5.0 mL of 1 mol/L HCl. The loading capacity of immobilized B. vallismortis was determined as 23.6 mg/g. The certified reference sample was employed for the validation of developed solid phase extraction method. The new validated method was applied to the determination of U(VI) in water samples from Van Lake-Turkey.
... In this investigation, bioaccumulation capacity of U(VI) exhibited difference in various periods of B. mojavensis growth. Some studies such as Macaskie and Dean (1984) and Volesky et al. (1993) similarly indicated that bacterial cells displayed difference in various cycles of growth of their metal bioaccumulation capacity. The difference of bioaccumulation capacity of metal ions by bacteria can be controlled with active mechanism and because the bacteria have a live and active metabolism, resistance and biosorption mechanisms may perform an act together in metal bioaccumulation . ...
... U(VI) concentration in Van Lake samples (two different location) were found as 66.2 ± 4.3 and 70.5 ± 2.9 ng/mL. The found U(VI) concentrations were in good agreement with literature value as 37e110 ng/mL (Yaman et al., 2011). They were also spiked with known amount of U(VI). ...
... As a result of exploration of these lakes, at present the principal amounts of lithium in the world are extracted from hydromineral raw materials. Currently on the agenda is the development of uranium resources of saline lakes [2,3]. From this point of view, mineralized lakes, the watershed of which is located in the territory of uranium ore districts, are of special interest. ...
Soda lakes located close to uranium deposits of West Mongolia contain elevated concentrations of uranium, reaching, in some cases, 1 to 3 mg/l. The concentration of uranium in the lakes of Russian Altai is lower and varies from 0.001 to 0.03 mg/l. The greatest uranium resources (about 6000 tons) are stored in Hyargas Nuur Lake, Western Mongolia. In addition to uranium and salts of sodium and magnesium increased contents of boron (up to 250 mg/l), bromine (up to 1.1 g/l), lithium (up to 600 mg/l), strontium (up to 8 mg/l) were determined in the lake waters. A scheme for complex processing of uranium-bearing lake waters, the first stage of which includes extraction of uranium using iron-containing sorbents or anion exchange resins is considered. Uranium compounds, bromine, iodine, boron, lithium and other elements found in salt lakes are an important raw material base for the production of advanced materials.
... Natural lakes with high concentrations of uranium are widespread, for example, Van in Turkey (110 μgL -1 ) [4], Issyk-Kul in Kyrgyzstan (30 μgL -1 ), Mono in the USA, California (300 μgL -1 ), Shar Burdiin in Eastern Mongolia (15000 μgL -1 ) [5]. In Western Mongolia, we have also discovered lakes with concentrations of uranium as high as 3000 μgL -1 ( fig. 1). ...
The saline lakes are a unique geochemical barrier for the migration of uranium which forms oxides, hydroxides, carbonates, phosphates, fluorides and other minerals in lakes sediment. This article presents data of chemical composition of some salt lakes in Western Mongolia. The concentration U-238 in some lake waters up to 3 mg/l. Uranium, in turn, forms complexes with carbonate-ions and migrate to the lakes, and precipitates in lake sediments by influence of evaporation and water-rock interaction time. There is shown that accumulation of uranium in lake water due to two main factors: first, localization of the lakes and their watersheds in potential provinces of U-bearing rocks and, second, uranium complexing with carbonate (bicarbonate) anions.
... The sanity of estuarine ecosystems can be evaluated through the monitoring of their bottom sediments. Some chemical elements that have a known toxic potential are often used as quality indicator of bottom sediments [1,2,[6][7][8]. It is not uncommon that bottom sediments are influenced by the soils present in the basin catchment area. So it is important to consider the geogenic contribution to the present chemical composition of bottom sediments. ...
The implantation of new industries and infrastructure (roads and piers) in the Suape Industrial Portuary Complex together with the weathering action are responsible for the transportation of particulate matter to the surrounding water bodies. A geochemical behavior study of trace metals was done in the watershed of Tatuoca River aiming to show the geochemical affinity among the chemical elements in order to identify its origin. Thirty six soil samples were collected using helical auger samples and four 50 cm long core samples were collected at the bottom of the river using a percussion sampler. The stream sediment core samples were divided into 5 cm intervals. The samples were analyzed by ICP/AES for: Al, Ba, Be, Cd, Co, Cr, Cu, Fe, La, Li, Mo, Ni, Pb, Sc, Sr, Ti, V, Y, Zn and Zr. Principal component analysis and concentration maps were used to interpret the data. Comparing the soil results to that of stream sediment profiles one can conclude that the stream sediments collected closer to the infrastructure and industrial implementation works are richer in sand fraction, Mo, Zr and Zn. On the other hand, the stream sediment profile further away from the construction works are richer in Fe, Cr, V, Ni, Cd and Pb. The understanding of the geochemical behavior of chemical elements present in the watershed (geogenic or anthropogenic) is important in land use occupation and also in establishing a local background value to evaluate future environmental impacts due to trace metals present in stream sediments.
... A sanidade de alguns ecossistemas estuarinos pode ser avaliada através do monitoramento da qualidade de seus sedimentos, pois a manutenção da cadeia alimentar está atrelada ao ciclo que os nutrientes desenvolvem interagindo diretamente com o material depositado. Alguns elementos químicos que possuem reconhecido potencial tóxico são por muitas vezes utilizados como bons indicadores da qualidade de tais sedimentos (Chagas-Spinelli et al., 2012;Dorraji et al., 2010;Yaman et al., 2011;Santos Bermejo et al., 2003;Morales-Caselles et al., 2008). Não é incomum, que sedimentos de um corpo aquático sofram influências da composição do solo contido em sua bacia de drenagem, onde esse aporte de material seja responsável pela composição química de pelo menos de parte dos sedimentos. ...
As atividades portuárias necessitam de monitoramento para verificar se as mesmas estão contribuindo para mudanças que causem impacto no ecossistema estuarino. Não seria diferente no crescente processo de industrialização que o Complexo Industrial Portuário de Suape vem sendo submetido, diante dos inúmeros empreendimentos ali instalados ou em processo de instalação, que o torna um ambiente susceptível às diversas formas de degradação ambiental. Neste contexto, vale ressaltar que o estudo da qualidade dos sedimentos depositados em corpos aquáticos, tais como os ecossistemas estuarinos portuários, agrega ainda valores científicos ao monitoramento ambiental, certificando que os resultados obtidos estão dentro de um rigor acadêmico e que pode ser utilizado pela comunidade empresarial. Diante dessa linha de investigação, o presente trabalho foi concebido utilizando uma linguagem técnica, mas de fácil compreensão, procurando-se explicitar a linguagem das interpretações estatísticas dos dados geoquímicos para fins ambientais. Assim, foram utilizadas ferramentas tais como o Fator de Enriquecimento, Diagrama Triangular de elementos químicos e o método estatístico multivariado Análise de Componentes Principais, onde o autor interpreta os resultados com uma visão crítica e multidimensional tornando possível uma abordagem acurada do impacto ambiental em zona portuária. De forma a tornar o texto mais didático para o leitor interessado em se utilizar de um moderno instrumental para interpretação de dados geoquímicos, é descrito cada método utilizado neste trabalho de forma clara e objetiva.
... The lake's geologic formation is tectonic, with the East Anatolian Fault Zone passing through its bottom. The bedrocks are generally of igneous, shale, limestone, and metamorphic origin (Yaman et al. 2011). The lake was earlier drained by the Maden Stream into the Tigris River, of the Persian Gulf drainage system, but after construction of the Hazar Hydroelectric Central in 1957, this outflow dried up (DSİ 1971). ...
Lake Hazar is an alkaline oligotrophic lake of tectonic origin, located in the Eastern Anatolia region in Turkey, 1248 m a.s.l. Its surface area is 80 km2, the average depth 93 m and maximum depth 205 m. The lake and its surroundings are under protection as a region of historical value. During the present study (2007–2012), samples were taken from 15 stations located at a depth of 2–200 m. Oligochaeta comprised 69% of the total invertebrate abundance. The profundal oligochaete fauna was found to consist of only three tubificid taxa, all of the subfamily Tubificinae. Potamothrix alatus hazaricus Timm & Arslan, n. ssp. was dominating anywhere down to maximum depths while Psammoryctides barbatus (Grube) and Ilyodrilus(?) sp. occurred seldom. All three are new records for Lake Hazar. Potamothrix alatus hazaricus shares the "winged" body shape in its genital region with the nominal, brackish-water subspecies P. a. alatus Finogenova, 1972, and the lateral position of the spermathecal pores and the shape of the ventral chaetae with the freshwater subspecies P. a. paravanicus Poddubnaja & Pataridze, 1989 known from Transcaucasian lakes. The mitochondrial COI barcoding
gene suggests long separation between the two taxa, but the nuclear ITS region shows no variation. The generic position of Ilyodrilus (?) sp. remains obscure since its internal genitalia could not be studied.
