A procedure for the sequential determination of radionuclides in soil and sediment samples

Sahli, Hans; Röllin, Stefan; Putyrskaya, Victoria; Klemt, E.; Balsiger, B.; Burger, Mario; Corcho-Alvarado, J.A.

doi:10.1007/s10967-017-5621-3

Cited by 18 publications

(14 citation statements)

References 26 publications

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“…Lake sediments record a large volume of information about changes in the lakes and their catchment giving rich history of human-nature interactions with the waterbody (Al-Mur, Quicksall, & Al-Ansari, 2017;Ntakirutimana, Du, Guo, Gao, & Huang, 2013;Sahli et al, 2017;Yanhong, Sumin, Barttarbee, & Yuxin, 2004). The information, largely include; land use, climatic, and environmental changes, which can be used to reconstruct the pollution history of a lake (Al-Mur et al, 2017;Skordas, Kelepertzis, Kosmidis, Panagiotaki, & Vafidis, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The sediments can also be used in understanding the spatial and seasonal variation of contaminant concentration levels (Lau & Chu, 1999). According to Al-Mur et al (2017); Zanjani-Jamshidi and Saeedi (2017) and Sahli et al (2017) study of sediment core vertically provides a reliable historical natural and anthropogenic metal record together with accumulation of various elements over time. In aquatic system, most metals are predominantly associated with the deposited sediment.…”

Section: Introductionmentioning

confidence: 99%

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Geochronological and spatial distribution of heavy metal contamination in sediment from Lake Naivasha, Kenya

Maina

Sang

Raude

et al. 2019

Journal of Radiation Research and Applied Sciences

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Sediment cores hold large information on the history of human interactions with lakes and surrounding environments. Hence, this study investigated the geochronological and heavy metals characteristics of sediment from Lake Naivasha, Kenya. Geochronological characteristics were established from sediment cores, using 210 Pb and 137 Cs. On the other hand, heavy metals; Al, As, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were analyzed using Inductively Coupled Plasma -Optical Emission Spectrometer (ICP -OES). Their probable sources were predicted using Pearson's correlation and Principal Component Analysis (PCA) while heavy metal contamination levels were assessed using geoaccumulation Index (Igeo), Contamination Factor (CF) and Enrichment Factor (EF) pollution indices. Results showed that the cores were about 140 years old with an estimated average mass sedimentation rate of 0.32 g/cm 2 /yr. Vertical fluctuations of heavy metal contamination were observed along the sediment cores with high values recorded near the surface. Further, PCA and pollution indices showed that Al, Cr, Cu, Ni, and Pb were from natural sources while, Zn, Mn, Fe, and As, (in order of contamination levels), were both from natural and anthropogenic sources. Therefore, this study showed the geochronological trends of sedimentation and impacts of human activities on Lake Naivasha.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geochronological and spatial distribution of heavy metal contamination in sediment from Lake Naivasha, Kenya

Maina

Sang

Raude

et al. 2019

Journal of Radiation Research and Applied Sciences

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“…The silicates were precipitated with 0.2 M polyethylene glycol in 4.5 M HNO 3 , left to settle overnight and filtered. The Pu fraction was separated using extraction chromatography with TEVA resin (Sahli et al., 2017) and Pu isotopes were measured by sector field inductively coupled plasma mass spectrometry – SF-ICP-MS (Röllin et al., 2009).…”

Section: Methodsmentioning

confidence: 99%

Coastal accretion and sea-level rise in the Cuban Archipelago obtained from sedimentary records

et al. 2020

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Sea-level rise (SLR) is one of the most pervasive consequences of global warming, and the Cuban Archipelago is threatened by current and future SLR. In order to support adaptation plans, it is essential to have reliable information about sea-level change during the last decades at the local scale, particularly in the most vulnerable regions. Here, we use sedimentary records to evaluate coastal accretion and to estimate the relative sea-level rise (RSLR) in two vulnerable coastal sites in central Cuba: Cayo Santa María (CSM) and Península de Ancón (PA). Both sites showed sediment sections with a continuous record of sediment accretion as a result of relative SLR and tropical storms. The sedimentary process was different between CSM and PA owing to differences in geomorphology and primary mineral composition. Sedimentary records also showed recent impacts of anthropogenic activities, likely increasing the vulnerability of the shoreline to SLR. The estimated RSLR values agreed with tidal gauge records, although they spanned a much longer time period (CSM: 0.5 ± 0.1 mm a−1, span of 38 years; PA: 1.5 ± 0.3 mm a−1, span of 92 years). Our results confirm that this methodology may be used to estimate the RSLR in places where data by instrumental records do not exist.

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“…The aliquots were then digested by a borate fusion using 50 mL Pt/Au (95%/5%) crucibles in a furnace at 1100 o C. The melt was poured into 4.5 M HNO 3 and the silicates were precipitated with Poly-Ethylene Glycol (PEG) (Röllin et al 2009). After ltration, Pu was separated from other radionuclides in a TEVA resin as described elsewhere (Sahli et al 2017). Pu radioisotopes were analysed in a multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS) Neptune equipped with 9 Faraday collectors and ve ion counters (SEM).…”

Section: Analysesmentioning

confidence: 99%

“…Sediment samples were analyzed for Pu radioisotopes as described elsewhere (Röllin, Sahli et al 2009, Sahli, Röllin et al 2017, Röllin, Sahli et al 2020. Brie y, about 5 g aliquots were spiked with known amounts of 242 Pu (about 3 pg).…”

Section: Analysesmentioning

confidence: 99%

Records of plutonium isotopes in marine sediments from the southern Gulf of Mexico

Corcho-Alvarado

Diaz-Asenciuo

Röllin

et al. 2021

Preprint

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Here we report on new data on plutonium (Pu) isotopes to elucidate activity concentrations, inventories, sources and their transport from the ocean surface to the sea floor from a collection of deep-sea sediment cores (depths ranging from 257 to 3739 m) in the Gulf of Mexico (GoM). Sediment cores collected from the continental shelf and upper slope region of the GoM consistently showed 240Pu/239Pu ratios of 0.15 to 0.26 and Pu-inventories ranging from 15 to 35 Bq m− 2. Inventories and ratios are consistent with global fallout Pu for this tropical region. In the continental shelf and upper slope regions, higher particle concentrations close to the margins favor significant scavenging and removal of Pu from the water column; in contrast with the deep-sea cores that show low 240Pu/239Pu ratios (0.07–0.13) and a much lower Pu inventory (< 7 Bq m-2) implying a small fraction of the expected global fallout inventory has reached into the lower slopes and abyssal plain of the GoM. Low values and a progressive decrease of 240Pu/239Pu ratios and Pu inventories with increasing water depth have been previously reported for the GoM. The low Pu ratios indicate that Nevada tests fallout was an important source of Pu to deep-sea sediments, and that this source was likely more efficiently removed from the water column than global fallout Pu. Analysis of Pu isotopes in two sediment traps from the upper slope regions show 240Pu/239Pu ratios comparable to the ones observed in the global fallout. These results indicate that global fallout Pu is currently the main source of Pu in water column particles. Therefore, a significant fraction of global fallout Pu must still be present; either in a dissolved phase, or as biologically recycled material in the water column, or scavenged on the shelf and shelf break. Our results bring to light important questions on the application of Pu isotopes to establish sediment chronologies, since these radionuclides are shown to be tracers of bioturbation rather than accumulation processes in deep-sea sediments of the GoM, similar to previously reported results from excess 210Pb.

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A procedure for the sequential determination of radionuclides in soil and sediment samples

Cited by 18 publications

References 26 publications

Geochronological and spatial distribution of heavy metal contamination in sediment from Lake Naivasha, Kenya

Geochronological and spatial distribution of heavy metal contamination in sediment from Lake Naivasha, Kenya

Coastal accretion and sea-level rise in the Cuban Archipelago obtained from sedimentary records

Records of plutonium isotopes in marine sediments from the southern Gulf of Mexico

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