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Öğe An investigation of anthropogenic pollution in soil samples from residential areas in Erzincan city center and its vicinity by evaluating chemical factors(Springer Heidelberg, 2018) Yalçın, Paşa; Kam, Erol; Yümün, Zeki Ünal; Kurt, DilekTo measure heavy metal pollution, 42 different soil samples were collected and analyzed from the center, cities, and villages of Erzincan. Average element concentrations in the soil samples in micrograms per gram were as follows: Cadmium (Cd, 6.1), Cobalt (Co, 52.2), Chromium(Cr, 739.6), Copper(Cu, 51.3), Nickel(Ni, 638.4), Lead (Pb, 14.2), and Zinc(Zn, 85.7), and these results were incompatible with natural background values. Heavy metal concentrations were at high levels, especially in agricultural regions and regions with mineral deposits. The results were compared to the allowable levels in soil dictated by pollution regulations in Turkey and some European countries. Krige (1962) method was used to evaluate the distribution of concentrations of heavy metals. Various methods such as Reverse Distance Weighted Interpolation Method (IDW), Local Polynomial, Radial-Based Function, and Kriging were used in preparing density maps. In the maps obtained, critical values for each heavy metal are defined. In addition, these critical values were compared with Krauskopf (1979) values. In this comparison, the values obtained in the samples showed ultramafic rocks in Erzincan region.Öğe Analyses of Heavy Metals in Sea Sediments from the Izmir Karaburun Region(Cihannüma Dayanışma ve İşbirliği Derneği, 2022) Kam, Erol; Çakar, Merve; Yümün, Zeki ÜnalThe present study aimed to determine heavy metal pollution in the Izmir Karaburun region of Turkey by analyzing the marine sediments within the Izmir Karaburun peninsula. Sediment samples were taken using a drilling method from six different regions on the peninsula and analyzed using laser-induced breakdown spectroscopy (LIBS). The percentage of the elements in the samples that matched the standard elements described in the device were determined. The results showed that potassium (K) with a 97% matching percentage and iron (Fe) with a 94% matching percentage was intensive in six different regions. In the first, fourth, and sixth regions, silver (Ag), which is a frequent heavy metal, was found at a high incidence of 50% as regards that in other regions. The results of these analyses were parallel to each other in six different regions in the Izmir Karaburun peninsula, and amount of possibly toxic heavy metals were found. When the LIBS conclusions were compared with the conclusion found in the literature, the existence of some elements, such as mercury (Hg), lead (Pb), and arsenic (As), which are known to be toxic elements and a danger to human health, were found in only trace amount; as a consequence, we supposed that there is no heavy metal pollution that could pose a hazard to human health and marine ecosystems within that region.Öğe Analysis and Correlatıon of Element Concentratıons of Marine Sediments between Silivri (İstanbul) and Dardanelles by ICP-OES and LIBS Methods(2019) Yümün, Zeki Ünal; Kam, ErolIn this work, the LIBS (Laser Induced Breakdown Spectroscopy) and ICP-OES (Inductively Coupled Plasma-Optical EmissionSpectrometer) technique applied to the determination of total concentration of some elements (Fe, Zn, Al, Mn, Co, Cr, Cu, Ni, Na,Mg, K, Ca) derived from soil samples of Marmara Sea. To support to the technique, LIBS data were compared with data have beenobtained on the same soil samples by application of Conventional Inductively Coupled Plasma Spectroscopy (ICP-OES). Thesimilarity of results obtained between the two sets of data suggested the potential applicability of the LIBS technique to the measurement of elements in soils. According to the study, it has been seen that the elements determined by ICP-OES analysis alsodetermined by LIBS method. It has the advantages of being faster than other traditional methods, being portable, having low analysiscosts, not being damaged and re-used during the analysis and short preparation period. However, the LIBS method is an important andpractical technique for the determination of elements of natural and anthropogenic origin. In the analysis made by ICP-OES method,the amounts of the elements in ppm are determined, while the results of LIBS analysis show the presence of the element only in %.According to LIBS method, Zn, Mn, Co, Cr and Cu concentrations vary according to each region. In this study, according to ICP-OESanalysis, Zn (42.2-111.7 ppm), Mn (163.2-581.1 ppm), Co (37.14-65.87 ppm), Cr (42.5-112.6 ppm), Cu (5.71-24.33 ppm), Ni ( 98.20-175.55 ppm), Al (16568.8-24850.9 ppm), Fe (20936.9-37397.9 ppm), Na (5223.4-12384.7), Mg (4800.4-7385.3 ppm), K (3290.8-5582.0) and Ca (42405.2-154577.0 ppm) ). LIBS analysis results showed that parallels Zn (0-22%), Mn (0-28%), Co (0-21%), Cr (0-23%), Cu (0-19%), Ni (%) 0-2), Al (67-78%), Fe (94-95%), Na (70-87%), Mg (82-90%), K (85-94%), Ca (66-%) 80). The LIBSmethod is an important technique for identifying elements enriched with anthropogenic factors and elements originating from naturalprocesses. The LIBS method can be used to determine the source of elements in marine or terrestrial environments. In addition, theLIBS method; It has also shown important results in the determination of toxic elements such as Mn, Cr, Co and Cu which increase inmarine sediment by anthropogenic factors.Öğe Analysis of Toxic Element with Icp-Oes and Libs Methods in Marine Sediments Around the Sea of Marmara in Kapidağ Peninsula(Muhammet KURULAY, 2019) Yümün, Zeki Ünal; Kam, Erol; Önce, MelikeIn this work, the LIBS (Laser Induced Breakdown Spectroscopy) and ICP-OES technique has been applied to the determination of total contents of heavy metals (Fe, Zn, Al, Mn, Co, Cr, Cu, Ni, Na, Mg, K, Ca) in soil samples of Marmara Sea. In order to validate the technique, LIBS data were compared with data obtained on the same soil samples by application of conventional Inductively Coupled Plasma ICP spectroscopy. The partial agreement obtained between the two sets of data suggested the potential applicability of the LIBS technique to the measurement of heavy metals in soils. According to the results, it was seen that the elements determined by ICP-OES analysis were also determined by LIBS method. The LIBS method is an important and practical technique for determining the elements that are enriched with anthropogenic factors as well as the elements resulting from natural processes.Öğe Concentrations of environmental radioactivity in sediment cores from kulakcayiri lake(Turkish Chemical Society, 2018) Kam, Erol; Yümün, Zeki Ünal; Açıkgöz, G.; Bayrak, KübraThis paper is about measurements of environmental radioactivity in samples taken from a lake bed and from different depths. The study is based on gamma spectrometric analysis of some radioisotopes encountered in sediment samples. For this purpose, sediments that have accumulated for thousands of years were used. Three core samples were taken from Kulakcayiri lake by drilling and taken from heights of 5-5.5 m, 10-10.5 m and 15-15.5 m at the same point and then moved to the laboratory. The analyses of the samples were carried out in the laboratory with the semiconductor HPGe detector. According to the results, the K-40 concentrations of the samples were 325 ± 18 Bq/kg, 353 ± 19 Bq/kg and 367 ± 19 Bq/kg, while their Th-232 concentrations were 38 ± 6 Bq/kg, 43 ± 6 Bq/kg and 42 ± 6 Bq/kg, respectively. Their concentrations of Ra-226 were calculated as 29 ± 5 Bq/kg, 26 ± 5 Bq/kg and 26 ± 5 Bq/kg, while the Cs-137 concentrations of the three samples were calculated as ?MDA (Minimum Detectable Activity) and existed at very low concentrations. The average activities of K-40, Th-232, Ra-226 and Cs-137 were found to be about 348 ± 186 Bq/kg, 41 ± 6.3 Bq/kg, 27 ± 5.1 Bq/kg and ?MDA, respectively. The results were compared with those of similar studies. These findings and assessments are expected to be an example for future studies and to be of reference quality. © 2018, Turkish Chemical Society. All rights reserved.Öğe Ecological analysis of heavy metal and radioactivity potential of Holocene sediments in Iznik Lake(Inst Nuclear Chemistry Technology, 2019) Yümün, Zeki Ünal; Kam, ErolIn this study, the heavy metal and radioactive properties of Iznik Lake were investigated. Concentration values of the first (Ag, Bi, Mo, Sn, Se, Zn, As, B, Cd, Co, Cr, Cu, Ni, Pb, Pt and Sb) and second (Na, Mg, K, Ca, P, S, Fe, Al and Mn) group of elements in borehole 1 (BH-1) drilling did not show much variation from the top to the bottom of the drilling. Concentration values of the first group of elements in borehole 2 (BH-2) drill samples decreased at higher levels of drilling. In addition, natural and anthropogenic radionuclides were measured by gamma spectrometry, and the results of environmental natural radioactivity of Iznik Lake and its surroundings were determined. In the measurement results, Ra-226 was found to be below the world average value at all locations. It is assumed that the determination of K-40 values above the average values was due to agricultural activities carried out intensively in the study area. Th-232 values were found to be below the world average value in drilling samples; Cs-137 values were below the background level in all samples. According to these results, the study area does not contain any unnatural radioactivity.Öğe Effects of radionuclides on the recent foraminifera from the clastic sediments of the Canakkale Strait-Turkey(Pergamon-Elsevier Science Ltd, 2017) Yümün, Zeki Ünal; Kam, ErolThe radionuclides that cause radioactivity accumulate in the sediments as they descend to the seabed, similar to heavy metals. As radionuclides are present on the surface of the sediment or within the sediment, marine benthic foraminifera can be affected by the radioactive pollution. In this study, the habitat of benthic foraminifera was evaluated for radioactive pollution in the Canakkale Strait, which constitutes the passage of the Marmara Sea and the Aegean Sea. In 2015, seven core samples and one drilling sample were taken from the shallow marine environment, which is the habitat of benthic foraminifera, in the Canakkale Strait. Locations of the core samples were specifically selected to be pollution indicators in port areas. Gamma spectrometric analysis was used to determine the radioactivity properties of sediments. The radionuclide concentration activity values in the sediment samples obtained from the locations were Cs-137: <2-20 (Bq/kg), Th-232: 17.5 583 (Bq/kg), Ra-226: 16.9-48.6 (Bq/kg) and K-40: 443.7-725.6 (Bq/kg). These values were compared with the Turkish Atomic Energy Agency (TAEK) and the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) data and environmental analysis was carried out. The Ra-226 series, the Th-232 series and the K-40 radionuclides accumulate naturally and increase continuously due to anthropogenic pollution. Although the Ra-226 values obtained in the study areas remained within normal limits according to UNSCEAR values, the K-40 and Th-232 series values were observed to be high in almost all locations. The values of Cs-137 were found to be maximum 20 in canakkale Dere Port and they were parallel to the values in the other places. In the study, 13 genera and 20 species were identified from core and drilling samples. The number of foraminifera species and individuals obtained at locations with high pollution was very low compared to those in non-polluted zones. (C) 2017 Elsevier Ltd. All rights reserved.Öğe Exposed Gamma Doses in air and Assessment of Cancer Risk around Gebze (Kocaeli/Turkey) Region(2021) Turgay, Muttalip Ergün; Acar, Zeynep; Yümün, Zeki Ünal; Artun, Arev; Kam, ErolBy this study, it is focused to assessment of inhalation quality for Kocaeli province especially Northeast side of Marmara Sea (Gebze county and its territory). In this case, radioactivity analysis in air was realized via air dose rate measurements around this region which is so closed neighbor to big city Istanbul. By measuring of the outdoor gamma dose rates on 35 stations, it was possible to get the average dose rate. Then it was calculated to annual dose in air. Besides, cancer risk was determined for Kocaeli. All these values were compared with the World’s references (UNSCEAR) and reported finally. It was measured the average dose rate as 23.90 $nGyhr^{-1}$ and annual dose was calculated to 29.31 ?Sv. This dose is required to excess lifetime cancer risk as 1.02x$10^{?4}$ . These values could be compared to the similar studies which existed around the world. Finally, the average annual effective dose equivalent and excess lifetime cancer risk for Kocaeli, are less than the world average. This study would be used to a reference for further investigations, besides it will be usefull to compare with different studies for Kocaeli which, will be evaluated in the future, for example after a nuclear pollution, such as based on a reactor leakage comes from Black Sea region and neighbours, nuclear attacks, etc., too. Another benefit would be made to enlarge to find this kind of studies in literature.Öğe GAMMA DOSE VALUES OF STRATIGRAPHIC UNITS OF BEHRAMKALE (ÇANAKKALE) - ZEYTİNLİ (EDREMİT-BALIKESİR) SECTION OF KAZ MOUNTAINS(2020) Kam, Erol; Önce, Melike; Yümün, Zeki ÜnalIn this study, gamma dose values were measured at 25 locations around a distance of60 km parallel to the Aegean Sea in Güre, Küçükkuyu and Kazdağı regions. These measurementswere made by keeping the Eberline Smart Portable (ESP) scintillator detector constant at a heightof 1 meter above ground level. A SPA-6 plastic scintillation sensor is connected to the instrumenttip to perform the measurement. These devices are direct measurement of external radiation. Asthe measurements were carried out in the open area, 0.2 occupancy factor was used in thecalculations. In the studies, the highest effective dose value was calculated as 0.3 mSv at thelocation 2 (Asos Kadırga Bay). The lowest effective dose value is 0.054 mSV at the 15th location(Avcılar Village Mountain slope) and the average annual gamma dose is 0.14 mSv. For the studyarea, when the lifetime risk of cancer was calculated using gamma effective dose values, it wasdetermined at the highest 2. locations (0.0012) and the lowest at the 15th locations (0,21x10-3).The average lifetime cancer risk value (2,39x10-4) of Turkey, were compared with values calculatedin this study. In this comparison, the gamma dose values of locations 9 and 15 were lower and thevalues of other locations were higher.Öğe Gamma Dose Values of Stratigraphic Units of Behramkale (Çanakkale) - Zeytinli (Edremit-Balikesir) Section of Kaz Mountains(Turkish Chemical Society, 2020) Yümün, Zeki Ünal; Kam, Erol; Önce, MelikeIn this study, gamma dose values were measured at 25 locations around a distance of 60 km parallel to the Aegean Sea in Güre, Küçükkuyu and Kazdağı regions. These measurements were made by keeping the Eberline Smart Portable (ESP) scintillator detector constant at a height of 1 meter above ground level. A SPA-6 plastic scintillation sensor is connected to the instrument tip to perform the measurement. These devices are direct measurement of external radiation. As the measurements were carried out in the open area, 0.2 occupancy factor was used in the calculations. In the studies, the highest effective dose value was calculated as 0.3 mSv at the location 2 (Asos Kadırga Bay). The lowest effective dose value is 0.054 mSV at the 15th location (Avcılar Village Mountain slope) and the average annual gamma dose is 0.14 mSv. For the study area, when the lifetime risk of cancer was calculated using gamma effective dose values, it was determined at the highest 2. locations (0.0012) and the lowest at the 15th locations (0,21x10-3). The average lifetime cancer risk value (2,39x10-4) of Turkey, were compared with values calculated in this study. In this comparison, the gamma dose values of locations 9 and 15 were lower and the values of other locations were higher. © 2020, Turkish Chemical Society. All rights reserved.Öğe Geographical Distribution of Toxic Elements in Northeast Marmara Sea Sediments and Analysis of Toxic Element Pollution By Various Pollution Index Methods (Istanbul/Turkey)(Corvinus Univ Budapest, 2021) Kam, Erol; Yümün, Zeki ÜnalIn this study, the geographic distribution of toxic element concentrations was determined in Northeast Marmara Sea (Istanbul/Turkey) sediments. In addition, the pollution degree of the environment was analyzed using various pollution index methods. Geochemical analysis of 28 elements were performed in sediment samples. The concentrations of several elements (especially Fe, Mn, Ti, Zn, and Cr) were found to be very high in some locations. At sites, where heavy metal concentrations were high, foraminifera genera and species numbers and number of individuals were very low. The low number of foraminifera in the samples taken from some regions could be due to uncontrolled ship traffic and domestic and industrial discharges.Öğe Investigation of Sediment Records of Kulakçayiri Lake (Istanbul)(2021) Önce, Melike; Yümün, Zeki Ünal; Açıkgöz, Gülderen; Kam, ErolIn this study, the date of the Holocene sediments of Kulakçayırı Lake was determined and the sedimentation rates were calculated. The determined sedimentation rates provide important clues about the climatic and ecological characteristics of the study area. Especially in aquatic environments, it is important to date sediment processes in order to monitor the time-dependent changes in the pollution processes of sediments. In this context, radiocarbon (14C) analysis was performed in order to date the sediments. Liquid scintillation spectrometry was used to find the radioactivity of the 14C isotope. Three drilling samples were taken from the study area (Kulakçayırı Lake / Istanbul) for 14C analysis. According to the results of 14C analysis of the samples taken; Sediment deposition in SK-1 sample took place in 5599 years, in SK-2 in 7596 years and in SK-3 in 8060 years. Sedimentation rates are; SK-1> SK-2> SK-3. From the data obtained, it was observed that the sedimentation rate has different rates at different points of the lake. There is no stream bringing material to the lake. Therefore, it can be said that a slow storage dominates the lake in general.Öğe MARMARA DENİZİ’NDE DENİZ SALYASI (MÜSİLAJ) OLUŞMA NEDENLERİ VE ALINMASI GEREKEN ÖNLEMLER(Çevre Şehircilik ve İklim Değişikliği Bakanlığı, 2023) Yümün, Zeki; Kam, Erol; Önce, MelikeDenizlerde nütrientlerin (besin maddeleri) artışı, su ısısında ani değişimler ve su akıntısının düşük olması alg ve diğer fitoplanktonların önemli ölçüde çoğalmasına neden olmaktadır. Bu mikroorganizmalar deniz salyası olarak tanımlanan şeffaf, yapışkan peltemsi bir madde oluştururlar. Su yüzeyini kaplayan ve sucul ortamda fotosentezin kısmen veya tamamen durmasına neden olan müsilaj örtüsü, sudaki çözünmüş oksijen oranını düşürmektedir. Oksijeni düşen deniz ortamında yaşayan canlılarda toplu ölümler gerçekleşmektedir. Ölen canlıların kalıntılarının da deniz salyasına katılmasıyla birlikte müsilaj bulunduğu ortamda kötü koku yayan bir maddeye dönüşmektedir. Bu durum zaman zaman Marmara Denizi’nde de görülmekte ve ciddi bir çevre problemi oluşturmaktadır. Bu problemin nedenlerini araştırmaya yönelik olarak denize deşarj olan sulardan, deniz salyasından ve deniz suyundan numuneler alınarak gerekli analizler yapılmıştır. Müsilajın pH değeri 6,65-7,12 arasında, deniz suyunun pH değeri ise 7,88-8,25 arasındadır. Analiz sonuçlarına göre müsilaj numunesinin asidik, deniz suyu numunesinin ise bazik karakterde olduğu saptanmıştır. Deniz suyuna azot ve fosfor gübresi katılarak suyun ve müsilajın asitlik durumu izlenmiştir. Bu deneyde müsilaj pH değeri 6,15-6,55’e, deniz suyunun pH değeri ise 7,15-7,25’e kadar düşerek ortamın asitleştiği ve elektrik iletkenliğinin arttığı görülmüştür. Deniz veya göllerde kirliliğin artmaması için bu ortamlara arıtılmamış sular deşarj edilememeli ve mümkünse deniz suyunun akımı arttırılmalıdır. Marmara Denizi günümüze kadar Çanakkale ve İstanbul boğazlarından gerçekleşen su akımları nedeniyle kendini temizleyebilme yeteneğine sahipti. Fakat son zamanlarda bölgede artan sanayileşme, artan nüfus, gemi trafiğindeki artış ve tarımsal faaliyetlerde kullanılan gübre ve ilaçlamaların artması nedenleriyle Marmara Denizi’ni kirleten ajanlar artmıştır. Bu kirlenme artışları denizin kendini temizleme kapasitesinin üzerinde olup, denizin kirlenmesi kaçınılmazdır. Bu nedenle Marmara Denizi’nin çevre problemlerinin çözümü için denize atık suların deşarj edilmemesi, tarımsal faaliyetlerde ve gemi trafiğinde kontrollerin artırılması hayati önem taşımaktadır. Ayrıca Marmara Denizi’nin su akımının artmasına ve su kirliliğinin seyreltilmesi amacıyla doğal veya yapay su yollarıyla denize temiz su sağlanması da araştırılmalıdırÖğe Radionuclide potential of holocene sediments in the west of marmara sea (Turkey)(Turkish Chemical Society, 2020) Yümün, Zeki Ünal; Kam, ErolRadionuclides that cause radioactive pollution descend to the bottom in marine and water environments such as heavy metals and accumulate in bottom sediments. It is useful to determine the radionuclides in these environments to control the radionuclide release and its damage. Radioactive pollution can harm people’s life directly or through the food chain. In this study, natural and artificial radionuclide values were measured in Recent sediment samples taken from the seabed in the western part of the Marmara Sea. Gamma spectrometry method was used in radionuclide examinations. In gamma spectrometry studies of sediments, values of radionuclides (40K,137Cs,226Ra,54Mn,95Z, and232Th) were determined. Sea depths where 18 analyzed seafloor sediments are taken vary between 15-50 m. The determined radionuclide concentration activity values of the study area are137Cs (0.9-9.4 (Bq / kg)),232Th (18.9-86 (Bq / kg)),226Ra (10-50 (Bq / kg)),40K (24.4-670 (Bq / kg)),54Mn (0.71-0.9 (Bq / kg)) and95Zr (0.18-0.19 (Bq / kg)). These values were correlated with the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). The226Ra series,232Th series, and 40K radionuclides accumulate naturally, and their concentrations increase gradually due to anthropogenic impurities.226Ra values obtained across the study areas are within normal limits according to UNSCEAR values.40K and232Th values were higher than UNSCEAR values in all locations. 137 Cs (0.9-9.4 (Bq / kg)) from almost all locations reveals a risky situation in terms of ambient conditions because this element cannot be found in the natural environment and can be found artificially as an end of radioactivity. © 2020, Turkish Chemical Society. All rights reserved.Öğe The Investigation of Toxic Element Pollution and Radioactivity Analyses of Marine Sediments in the Gulf of Gemlik (Bursa, Turkey)(Corvinus Univ Budapest, 2021) Yümün, Zeki Ünal; Kam, Erol; Dinçer, Ali Rıza; Önce, Melike; Yümün, SevinçIn this study, the Toxic element pollution and radioactivity of marine sediments in the Gulf of Gemlik was determined. Enrichment factor (EF) and Pollution index (PI) analyses have been applied to determine toxic element pollution. According to the enrichment factor results, the EFNi in BH-1 was between 3 < EFNi < 5, and the other EF values are all below 3. In radionuclide analysis, the Ra-226 and Th-232 values were found to be below the global average value in all locations. It is estimated that the K-40 values, which are above the world average values in the BH-1 drillings, are due to the intensive agricultural activities in that part of the study area. Cs-137 values were found to be 5.3 Bq/kg in the BH -1/1 drilling location. This finding is very important in terms of environmental pollution. In other locations, samples have been found to be below the Cs-137 MDA. The K-40 value has been found to be the highest in Kur?unlu. The Th-232 value has been found to be highest in F?st?kl?, which was below the world average value. There is a parallel between Pollution Index, Enrichment Factor and Radioactivity analysis.Öğe The Origin of the Gross Alpha and Beta Radiation Values of the Waters of Çanakkale Strait (Çanakkale/Turkey)(2017) Kam, Erol; Önce, MelikeThis study is an evaluation of radioactivity the waters of the Çanakkale Strait. The gross alpha- and gross beta-radioactivity counts (Berthold, LB770-PC 10-Channel Low-Level Planchet Counter) were calculated for seawater samples taken from eight different regions of the Çanakkale Strait (Şevketiye, Seddülbahir, Lapseki, Kumkale, Burhanlı, Dereliman, Eceabat, and Gelibolu). In the samples, the gross alpha-radiation ranged between 0.064 and 0.046Bq/L and the gross beta-radiation ranged between 14.325 and 10.532 Bq/L. The highest gross alpharadiation concentration was measured at Gelibolu (0.064 Bq/L) while the lowest (0.046 Bq/L) was measured at Şevketiye. The highest value for gross beta-radiation concentration (14.325 Bq/L) was measured in Seddülbahir, and the lowest value (10.532 Bq/L) was measured in Dereliman. The gross alpha-radiation concentrations measured by the Turkish Atomic Energy Authority in Çanakkale’s drinking and utility water ranged between 0.05 and 0.400 Bq/L, and the highest values (0.300 to 0.400Bq/L) were found in the Ezine county. Gross beta-radiation concentrations ranged from 0.05 to 0.500 Bq/L, and the highest values (from 0.400 to 0.500 Bq/L) were recorded in Lapseki province. The gross beta-radiation concentrations in both the sample results and TAEK data were determined to be high in Lapseki and its vicinity. Comparing the mean gross beta- and alpha-radiation concentration values of the Çanakkale Strait with the Bosphorus, the Sea of Marmara and the Black Sea, beta-radiation values in the study area were very high. Gross alpha-radiation results were low in the study area compared to other regions. Evaluating the results against the legal limit threshold, the results were above the legal limit for gross beta-radiation. This result indicates that the water is affected by the rocks through which it passes
