Properties of 137Cs in marine sediments off Yangnam, Korea

Park, G.; Lin, Xiu-Jing; Kim, Woo Tae; Kang, Heedong; Lee, H.L.; Kim, Yongku; Doh, Sih-Hong; Kim, D.S.; Yun, Sung Gyu; Kim, C.K.

doi:10.1016/j.jenvrad.2004.03.012

Cited by 16 publications

(6 citation statements)

References 26 publications

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“…Similar to this study, 137 Cs inventories in marine sediments were greater in areas that receive 137 Cs associated with riverborne particles (Su and Huh 2002). And in tidal marsh soils, terrestrial soils, and marine sediments, 137 Cs inventories were positively related to organic matter content (McHenry and Ritchie 1977;Park et al 2004). Regardless of 137 Cs remobilization that could result in low 137 Cs inventories in Georgia tidal marsh soils, the similarity in trends of 137 Cs-and feldspar-based accretion rates provides convincing evidence that freshwater input promotes vertical accretion in these marshes.…”

Section: Resultssupporting

confidence: 80%

Freshwater input structures soil properties, vertical accretion, and nutrient accumulation of Georgia and U.S tidal marshes

Craft

2007

Limnology & Oceanography

282

186

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To identify relationships between freshwater input and marsh soil properties, measurements of bulk density, nutrients (carbon [C], nitrogen [N], phosphorus [P]), accretion, and accumulation were compared in tidal marshes of three estuaries of Georgia that varied in delivery of freshwater. Soil organic C and N (0-30 cm) were two times greater in marshes of the freshwater-dominated Altamaha River than in the salt marshes of Doboy Sound and Sapelo River. 137 Cs accretion and accumulation of organic C and N were three to five times greater in freshwaterdominated marshes than in salt marshes. The patterns observed in Georgia marshes were geographically general; data for tidal freshwater and brackish marsh soils compiled from 61 studies in the conterminous United States showed lower bulk density and higher percent organic C and N than salt marshes, regardless of geographic region. Salinity, a proxy for freshwater input, was inversely correlated with percent soil organic C and N and with vertical accretion in Georgia marshes and in marshes elsewhere in the conterminous United States. There was no relationship between above-or belowground emergent plant production and salinity of Georgia marshes but the rate of root decomposition was positively related to salinity, and decomposition rate was negatively related to percent soil organic C and C accumulation. In Georgia tidal marshes and elsewhere, soil organic matter content and accumulation are mediated by freshwater through its effects on decomposition.

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Section: Resultssupporting

confidence: 80%

Freshwater input structures soil properties, vertical accretion, and nutrient accumulation of Georgia and U.S tidal marshes

Craft

2007

Limnology & Oceanography

282

186

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“…The concentration of 137Cs varies depending on the particle size of the sediment, mineral composition, organic matter and total organic carbon content. The amount of total organic carbon was found to be important in the deposition of 137Cs radionuclides in sediments [14] and a significant relationship between the amount of total organic matter and 137Cs was reported in some studies in the literature [14,[34][35]. In this study, a positive correlation was found between the amount of total organic carbon and 137Cs radioisotope in accordance with the literature.…”

Section: Statistical Analysessupporting

confidence: 89%

Evaluation of radioactive pollution in sediment samples of Borçka Dam Lake, Turkey

Şirin

2019

Cumhuriyet Science Journal

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In this research, the concentrations of natural (226Ra, 232Th and 40K) and anthropogenic (137Cs) radionuclides were measured in sediment samples collected from the Borçka Dam Lake using a high purity germanium detector (HPGe). The activity values ranged from 4.79-21.46, 9.36-20.65, 238.01-721.26 and 0.79-6.81 Bq kg-1 for 226Ra, 232Th, 40K and 137Cs respectively. The average 226Ra, 232Th and 40K activity concentrations calculated for the sediment samples were found to be lower compared to world average values reported by UNSCEAR. In addition, radiological hazard indices were determined and compared with the international permissible values. The results of this study revealed that there is no significant health risk for people exposed to sediment samples in this region.

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“…Indeed, this was previously found for Kaštela Bay sediments, where a statistically significant positive correlation between 137 Cs activity and organic matter content was established [22]. The significant association of 137 Cs with the organic matter in the sediments was determined by other authors as well [10,16,[50][51][52]. However, organic matter is not the only influencing factor.…”

Section: Discussionsupporting

confidence: 57%

“…137 Cs mobility is largely dependent on its sorption to sediment surface [7,8]. Particle fluxes, including organic matter, are significantly higher in coastal and more productive waters than in the open ocean, and thus, more 137 Cs can be removed by binding to particulate matter in the coastal area [9,10]. In that case, 137 Cs behaves as a non-conservative element.…”

Section: Introductionmentioning

confidence: 99%

137Cs Sediment Profiles as a Tracer of Marine Sedimentation Processes in a Semi-Enclosed Bay Affected by Anthropogenic Releases—Example of Kaštela Bay (Adriatic Sea, Croatia)

Mikelić

Cukrov

Oreščanin

et al. 2022

Water

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Kaštela Bay was taken as a model to study sedimentation processes using the vertical sediment profiles of 137Cs massic activities. The aim was to distinguish the sedimentation conditions in different parts of the Bay and to partly determine the pathways of terrigenous input into the Bay. The purpose was to demonstrate that 137Cs profiles are applicable in differentiating sedimentation processes. It was found that mostly continuous, undisturbed sedimentation takes place in the central and south parts of the Bay; the sedimentation conditions in the west part of the Bay are more complicated. The west part is characterised by the extremely slow sedimentation of the coarse-grained sediment or even by erosion and selective resuspension of the fine-grained particles followed by resedimentation in other parts of the Bay. It was also observed that the upper 10 cm of the sediment is the most exposed to homogenisation. The strong influence of the Jadro River and anthropogenic activities in the east part of the Bay are reflected in the higher 137Cs activities, strong sediment mixing, and increased sediment input. This study shows that the 137Cs profiles can provide comprehensive insights for the whole study region when a sophisticated sampling layout is deployed. The results of the study are applicable to other aquatic environments with comparable processes and sedimentary environments.

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Properties of 137Cs in marine sediments off Yangnam, Korea

Cited by 16 publications

References 26 publications

Freshwater input structures soil properties, vertical accretion, and nutrient accumulation of Georgia and U.S tidal marshes

Freshwater input structures soil properties, vertical accretion, and nutrient accumulation of Georgia and U.S tidal marshes

Evaluation of radioactive pollution in sediment samples of Borçka Dam Lake, Turkey

137Cs Sediment Profiles as a Tracer of Marine Sedimentation Processes in a Semi-Enclosed Bay Affected by Anthropogenic Releases—Example of Kaštela Bay (Adriatic Sea, Croatia)

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