scholarly journals Lead Isotopes Combined with Geochemical Baseline in Sediments: A Novel Tool to Trace Anthropogenic Pb Sources

2020 ◽  
Vol 17 (3) ◽  
pp. 1112
Author(s):  
Xu ◽  
Gao
Keyword(s):  
Sediment Core ◽  
Source Identification ◽  
Anthropogenic Activities ◽  
Lead Isotopes ◽  
Isotopic Ratios ◽  
Coal Consumption ◽  
Sediment Samples ◽  
Geochemical Baseline ◽  
Novel Approach ◽  
Pb Concentration

Traditional Pb isotopic identification only based on total Pb concentration and Pb isotopic ratios, resulted in difficulty for tracing Pb sources in the complex environmental medium, especially for sediment. Herein, a novel approach combining with regional geochemical baseline (RGB) and Pb isotopic ratios are used to directly trace anthropogenic Pb sources and calculate Pb source appointments in sediment. In this study, total Pb concentrations and isotopic ratios were analyzed for a 7-m long sediment core (92 sediment samples) collected from a reservoir. RGB of Pb was used to calculate anthropogenic Pb concentrations (Rd), their contributions (CRd) and screen the sediments influenced by anthropogenic activities. Among those sediments influenced by anthropogenic activities, a positive correlation was found between 206Pb/207Pb ratios and Rd, indicating there were two anthropogenic Pb sources in sediment. Further source identification using 206Pb/207Pb and 208Pb/207Pb indicated that these two anthropogenic Pb sources originated from coal consumption and aerosol input. Finally, CRd and Pb isotopic ratios were used to calculate these two Pb source appointments (1.13% for coal consumption and 7.53% for aerosol input). This study demonstrated that source identification using RGB and Pb isotopes could be a novel attempt for identifying anthropogenic Pb sources in sediment.

Long-term lead contamination and isotopic source identification in Northern Hungary

2021 ◽  
Author(s):  
Gorkhmaz Abbaszade ◽  
Davaakhuu Tserendorj ◽  
Nelson Salazar ◽  
Dóra Zacháry ◽  
Péter Völgyesi ◽  
...  
Keyword(s):  
Power Plant ◽  
Source Identification ◽  
Isotopic Ratio ◽  
Soil Samples ◽  
Lead Contamination ◽  
Lead Content ◽  
Isotopic Ratios ◽  
Binary Mixing ◽  
High Lead ◽  
Pb Concentration

<p>Lead is one of the extensively distributed PTEs (potentially toxic elements) in the environment due to wide-scale anthropogenic activities (e.g., mining, vehicular emissions, industries, etc.), its geochemical feature, and natural abundance. The World Health Organization (WHO) defined Pb as 2<sup>nd</sup> most dangerous element for health, with particular concern for mental and physical disorders in adults and children. Salgótarján and Ózd cities (Northern Hungary) are two main former heavy industrial cities, with the smelter, steel industry, coal-fired power plant, coal mines, etc., supplied the country with coal and iron and steel products for centuries. The main aim of the research is to obtain a lead distribution map of the region and identify the potential sources by use of stable lead isotopes.</p><p>Urban soil samples were collected from each km<sup>2 </sup>of both cities. Additionally, a soil as geochemical background, as well as local slag and coal as suspected major pollution sources were collected. Lead content and stable Pb isotopes of all samples were analyzed by ICP-MS spectrometry.</p><p>Obtained results indicate heterogeneous distribution and high lead enrichment in both cities, where the Pb concentration ranged from 8.5 to 1692 ppm in Salgótarján and from 6.6 to 1674 ppm in Ózd. The average lead isotopic ratio in soil samples ranged from 1.146 to 1.240 (<sup>206</sup>Pb/<sup>207</sup>Pb) for Salgótarján and from 1.084 to 1.240 for Ózd. Total Pb concentration and isotopic ratios of slag and coal samples depicted notable differences as isotopic ratios for Salgótarján and Ózd coals are <sup>206</sup>Pb/<sup>207</sup>Pb:1.175 and <sup>206</sup>Pb/<sup>207</sup>Pb:1.256, respectively. Meanwhile, the lead content in the Salgótarján fly-ash slag (from the coal-fired power plant) was identified as 14 ppm (<sup>206</sup>Pb/<sup>207</sup>Pb:1.175, similar to coal). However, the Ózd smelter slag was characterized by high lead concentration (202 ppm) and lowest isotopic composition (<sup>206</sup>Pb/<sup>207</sup>Pb=1.118).</p><p>To calculate the relative contribution of anthropogenic sources, suggested binary mixing models were used. It is revealed that in Salgótarján soils average 34 % of Pb enters from industrial sources, 43 % from coal, and 23 % from the natural environment. In contrast, in Ózd, the proportion of anthropogenic lead is estimated on average by 53 % from industries (slag), 38 % from coal, and only 9% from natural input. The proportion of coal and slag in the soil samples was proved by thorough microscopy observations and SEM analysis as well.</p><p>In conclusion, based on the comprehensive analysis, local smelter and steel-iron industries were the dominant Pb contamination sources in both cities.</p><p> </p><p><strong>Keywords: </strong>Lead pollution, isotopic ratio, source identification, binary mixing model</p>

Lead isotopes as a tracer of Pb origin in the sediments from Beijiang River, South China

2012 ◽  
Vol 66 (12) ◽  
pp. 2613-2619 ◽  
Author(s):  
Bo Gao ◽  
Xirong Liang ◽  
Huaidong Zhou ◽  
Xianglin Tu
Keyword(s):  
South China ◽  
Lead Isotopes ◽  
Average Concentration ◽  
Anthropogenic Sources ◽  
Isotopic Ratios ◽  
Pb Pollution ◽  
Beijiang River ◽  
Anthropogenic Inputs ◽  
Binary Mixing ◽  
Pb Concentration

Concentrations and enrichment of heavy metals were determined in sediments collected from Beijiang River, South China. The Pb isotopic compositions in these sediment samples were also employed to effectively identify metal pollution sources. According to the measured Pb concentrations, the total Pb concentrations in sediments varied from 62.1 to 1,152.5 μg/g, with an average concentration of 249.6 μg/g. The assessment by Geoaccumulation Index indicates that Pb is at the ‘strongly contaminated’ level, indicating that the Pb pollution was mainly due to anthropogenic inputs. The observed isotopic ratios varied from 1.174 to 1.204 for 206Pb/207Pb, 2.452 to 2.478 for 208Pb/207Pb, 18.404 to 18.937 for 206Pb/204Pb, 15.631 to 15.790 for 207Pb/204Pb, 38.455 to 39.121 for 208Pb/204Pb. The majority of these ratios are lower than those reported for natural geological sources, especially for sediments collected from a smelter. Significant correlation between Pb concentration and isotopic ratios suggested possible binary mixing of Pb. Combined with Pb concentration and enrichment levels, our results show that Pb pollution in the sediments of Beijiang River was mainly derived from anthropogenic sources. The mining activities and metal smelting processing was the main source of Pb pollution in this region.

Pollutant concentrations in a sediment core dated by Th-isotopic ratios and the 210Pb dating method

2001 ◽  
Vol 89 (11-12) ◽  
Author(s):  
E.G. San Miguel ◽  
J.P. Bolívar ◽  
R. García-Tenorio ◽  
J.E. Martín
Keyword(s):  
Sediment Core ◽  
Anthropogenic Activities ◽  
Natural Radionuclides ◽  
210Pb Dating ◽  
Isotopic Ratios ◽  
Estuarine System ◽  
The Core ◽  
Pollutant Concentrations ◽  
Dating Method ◽  
210Pb Dating Method

In this research we have dated a sediment core in an estuarine system (southwest of Spain) strongly contaminated by anthropogenic activities, making use of the enhanced levels of some natural radionuclides from uranium series found in the upper layers of the core due to these activities and applying the

scholarly journals PRELIMINARY STUDIES ON SEDIMENT CORE FROM THE TYRO BASIN

2017 ◽  
Vol 50 (1) ◽  
pp. 324
Author(s):  
M. Geraga ◽  
Ch. Anagnostou ◽  
I. Iliopoulos ◽  
M. Kontali
Keyword(s):  
Mediterranean Sea ◽  
Sediment Core ◽  
Eastern Mediterranean ◽  
Planktonic Foraminifera ◽  
Mineralogical Composition ◽  
Eastern Mediterranean Sea ◽  
Sediment Samples ◽  
Preliminary Results ◽  
The Core ◽  
Mineral Constituents

The present paper summarizes the preliminary results of the mineralogical and micropaleontological analysis conducted on sediment samples from core TYR05 retrieved from the anoxic and hypersaline Tyro basin in the eastern Mediterranean Sea. The core comprises a complex lithostratigraphic sequence attributed to the strong geodynamic regime of the area. The planktonic foraminifera associations present fluctuations which coincide with changes in the lithology of the core. The mineralogical composition of the sediments shows influence from the evaporites developed on the bottom of the basin. The mineral constituents in association to the microfauna assemblages suggest that the sediments include sapropelic layers. Further analyses are needed in order to determine safely the sapropelic deposits.

scholarly journals Biokonsentrasi Timbal (Pb) pada Hepatopankreas, Insang dan Daging Penaeus merguiensis di Teluk Kelabat Bagian Luar

2019 ◽  
Vol 22 (2) ◽  
pp. 109
Author(s):  
Derra Alianie Tawa ◽  
Budi Afriyansyah ◽  
Muhammad Ihsan ◽  
Mohammad Agung Nugraha
Keyword(s):  
Heavy Metals ◽  
Daily Intake ◽  
The Body ◽  
Mining Activities ◽  
Sediment Samples ◽  
Water And Sediment ◽  
Safe Limit ◽  
Penaeus Merguiensis ◽  
Pb Concentration ◽  
Water And Sediment Samples

Illegal tin mining or unconventional mining activities produce tailings. Tailings contain dangerous heavy metals one of which is Lead (Pb). The increasing concentration of Pb in the waters will also increase its concentration in the body of the biota, one of which is shrimp. The purpose of this study was to analyse the Pb content in gills, hepatopancreas and muscle in Penaeus merguiensis, analyse the Pb content in water and sediments, measure the ability of Penaeus merguiensis in accumulating Pb in water and sediments, and determine the safe limit for consumption. Shrimp, water and sediment samples were analysed using AAS. The results showed that the highest Pb concentration in Penaeus merguiensis was hepatopancreas> gill> meat, with an average range of 0,1897–0,4064 mg/kg, gills 0,2424-0,4770 mg/kg, and meat 0,1348-0,1636 mg/kg. The average Pb concentration in water ranged from 0,2624 to 0,5713 mg/L, while the sediment ranged from 0,2783 to 0,9760 mg/kg. The ability of Penaeus merguensis to accumulate Pb included in the low category. The value of daily intake is around 9,760-11,128 kg/week. Aktivitas penambangan timah illegal atau tambang inkonvensional menghasilkan sisa limbah buangan (Tailing). Tailing mengandung logam berat berbahaya salah satunya Timbal (Pb). Meningkatnya konsentrasi Pb di perairan akan meningkat pula konsentrasinya dalam tubuh biota, salah satunya udang. Tujuan dilakukannya penelitian ini adalah menganalisis kandungan Pb pada insang, hepatopankreas dan daging pada Penaeus merguiensis, menganalisis kandungan Pb pada air dan sedimen, mengukur kemampuan Penaeus merguiensis dalam mengakumulasikan Pb di air dan sedimen, dan menentukan nilai batas aman konsumsi. Sampel udang, air dan sedimen dianalisis menggunakan AAS. Hasil penelitian menunjukkan bahwa konsentrasi Pb tertinggi pada Penaeus merguiensis adalah hepatopankreas>insang>daging, dengan kisaran rata-rata 0,1897–0,4064 mg/kg, insang 0,2424-0,4770 mg/kg, dan daging 0,1348-0,1636 mg/kg. Konsentrasi Pb rata-rata dalam air berkisar antara 0,2624-0,5713 mg/L, sementara sedimen berkisar dari 0,2783-0,9760 mg/kg. Kemampuan Penaeus merguensis untuk mengakumulasi Pb termasuk dalam kategori rendah. Nilai asupan harian sekitar 9,760-11,128 kg/minggu.

Variability of Settling Particles Fluxes and Isotopic Composition (δ13C and δ15N) from Material Trapped in Coastal Reefs of Abrolhos Bank, Eastern Brazilian Shelf

2020 ◽  
Vol 43 (3) ◽  
Author(s):  
Saulo Spanó ◽  
André Luiz Belem ◽  
Maria Do Rosário Zucchi ◽  
Paulo De Oliveira Mafalda Junior ◽  
Alessandro Lopes Aguiar ◽  
...  
Keyword(s):  
Organic Matter ◽  
Isotopic Composition ◽  
Environmental Monitoring ◽  
Isotopic Ratio ◽  
Isotopic Ratios ◽  
Sediment Composition ◽  
Δ13c And Δ15n ◽  
Sediment Samples ◽  
Carbon And Nitrogen ◽  
Average Value

Elemental and isotopic ratios (C/N, δ13C, δ15N) of sediment samples captured by PVC traps in eight stations along the coastal reefs of the Abrolhos region, Brazil, were analyzed. The study area is characterized by the influence of continental sediments on biogenic sediments. The highest δ13C values were found in the Sebastião Gomes (second shallower station), with average values close to -15‰ in all sampling periods. The isotopic ratio of carbon and nitrogen indicates that the organic matter analyzed has marine origin, with signature features of oceanic regions. The highest C/N ratio average value of 8.29 occurred in Nova Viçosa (the southernmost station and one of the shallowest) during the spring, in other seasons the average value was close to 7 in all periods. Although the values of C/N indicate a significantly marine contribution, δ15N values suggest that N series recycling processes are frequent during the time that the material remained in the environment. The results will provide a baseline for future environmental monitoring and studies on changes in sediment composition in an important set of coastal coral reefs.

scholarly journals Recent pollution and source identification of metal(loid)s in a sediment core from Gunsan Reservoir, South Korea

2021 ◽  
pp. 126204
Author(s):  
Pyeong-Koo Lee ◽  
Jaesoo Lim ◽  
Youn-Joong Jeong ◽  
Seho Hwang ◽  
Jin-Young Lee ◽  
...  
Keyword(s):  
South Korea ◽  
Sediment Core ◽  
Source Identification
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