Speciation of 210Po and 210Pb in air particulates determined by sequential extraction

Al-Masri, M.S.; Al-Karfan, K.; Khalili, Hannele; Hassan, M.

doi:10.1016/j.jenvrad.2006.08.010

Cited by 20 publications

(11 citation statements)

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“…Concentration levels of 210 Pb and 210 Po (Table 2) in the three fractions of PM 10 followed the methodology published by Tessier et al (1979) and Jia et al (2006) Although there are not many references on the fractionation of 210 Pb and 210 Po in air particulates, we have observed that PM 10 in marine aerosols at Mersing in Table 2 were slightly different to air particulate samples from Syrian arid regions as analyzed by Al-Masri et al (2006). The proportion in the Syrian samples are relatively smaller for 210 Pb in both fractions, i.e., bound to Fe-Mn oxides and organic matter, at only 7-12 and 15-24 %, respectively, at the Tartous port site, and at only 4-11 and 13-24 %, respectively, at the phosphate mine site.…”

Section: Resultsmentioning

confidence: 61%

“…Hence, identification of the main binding sites and phase associations of each element helps in understanding geochemical processes (Sutherland et al 2000). According to Al-Masri et al (2006), 210 Po activity concentrations follow its parent, 210 Pb in its chemical form only if it is produced by the decay of 210 Pb in the same matrix. On the other hand, 210 Po contributed from external sources (e.g., volcanic activities) may follow a different chemical form and are most likely attached to and adsorbed at the surface of particles.…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile for the second fraction, organic binding occurs in various forms of organic matter, i.e., living organisms and detritus. The final fraction is the remaining residual solid, in the form of primary and secondary minerals associated with detrital silicate and soluble acids, resistant sulfides, and a small quantity of refractory organic materials (Al-Masri et al 2006;Jia et al 2006).…”

Section: Resultsmentioning

confidence: 99%

“…Since the mean residence time of dust suspended in the troposphere is about 15 days, there is little time for 210 Po to be formed in suspended dust (Poet et al 1972;Moore et al 1973), and therefore, the concentration of 210 Po near-ground level is smaller than that of 210 Pb. Nevertheless, this is only true when the decay of radon gas is the only source of these two radionuclides (Al-Masri et al 2006).…”

Section: Resultsmentioning

confidence: 99%

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Impact of northern and southern air mass transport on the temporal distribution of atmospheric 210Po and 210Pb in the east coast of Johor, Malaysia

Sabuti

Mohamed

2016

Environ Sci Pollut Res

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Concentration activities of (210)Pb and (210)Po in the PM10 were determined to discuss their distribution and chemical behavior in relation to meteorological parameters especially in air mass transport during monsoon events. Marine aerosol samples were collected between January 2009 and December 2010 at the coastal region of Mersing, which is located in the southern South China Sea and is about 160 km northeast of Johor Bahru, as part of the atmosphere-ocean interaction program in Malaysia. About 47 PM10 samples were collected using the Sierra-Andersen model 1200 PM10 sampler over a 2-year sampling campaign between January 2009 and December 2010. Samples were processed using acid digestion sequential extraction techniques to analyze various fractions such as Fe and Mn oxides, organic matter, and residual fractions. While, (210)Pb and (210)Po activities were measured with the Gross Alpha/Beta Counting System model XLB-5 Tennelec® Series 5 and the Alpha Spectrometry (model Alpha Analyst Spectroscopy system with a silicon-surface barrier detector), respectively. The distribution activities of (210)Pb and (210)Po in the PM10 samples were varied from 162 to 881 μBq/m(3) with mean value of 347 ± 170 μBq/m(3) and from 85 to 1009 μBq/m(3) with mean value of 318 ± 202 μBq/m(3), respectively. The analysis showed that (210)Po activity in our samples lies in a border and higher range than global distribution values due to contributions from external sources injected to the atmosphere. The speciation of (210)Pb and (210)Po in marine aerosol corresponds to transboundary haze; e.g., biomass burning especially forest fires and long-range air mass transport of terrestrial dust has enriched concentrations of particle mass in the local atmosphere. The monsoon seems to play an important role in transporting terrestrial dust from Indo-China and northern Asia especially during the northeast monsoon, as well as biogenic pollutants originating from Sumatra and the southern ASEAN region during southwest monsoon events.

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Impact of northern and southern air mass transport on the temporal distribution of atmospheric 210Po and 210Pb in the east coast of Johor, Malaysia

Sabuti

Mohamed

2016

Environ Sci Pollut Res

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“…This phenomenon for Pb was similar to another result (Svete et al, 2001), where authors reported that oxidisable fraction is a significant scavenger of Pb. Lead emissions are mainly from traffic and residential heating (Al-Masri et al, 2006) and around 66% of Pb being found to be associated with organic materials and this is due to incomplete burning of vehicles fuel (AlMasri et al, 2006) and a similar trend has also been observed in Nomi River sediment.…”

Section: Oxidisable Fraction (Sulphide and Organics)mentioning

confidence: 83%

Rare Earth Elements and Geochemical Partitioning of Zn and Pb in Sediments of an Urban River

Sharmin¹,

Zakir²,

Shikazono³

2010

American Journal of Environmental Sciences

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Problem statement: Urban river sediment pollution due to Zn and Pb is a serious problem in all over the world. The source and level of Zn and Pb pollution in sediments of Nomi River of Ota Ward, one of the most industrialized areas in Tokyo, Japan is still lacking. Approach: The present study focused on Rare Earth Elements (REEs) and geochemical partitioning of Zn and Pb in sediments of 19 sampling sites of Nomi River in order to examine the mobility pattern. The amounts of Zn and Pb in the liquid extract of 5 (five) geochemical phases were measured by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and the concentrations of REEs in sediments were determined by using X-ray Fluorescence Spectroscopy (XRF). Results: Speciation data indicate dominant labile fraction of Zn, which is related to the presence of several anthropogenic influence of the investigated area. Enrichment Factor (EFc) and Index of geoaccumulation (I geo ) value were compatible with the result, which confirm pollution status of Zn. Environmental risk of Zn and Pb were also evaluated using the Risk Assessment Code (RAC) and sequential extraction results and found Zn poses high to very high risk (34-59), whereas Pb poses low to medium environmental risk (0-19). Conclusion: The mean values of REEs and other minor elements were lower or very close to average shale and Japanese river sediment value but Sr, Sn, Zr and Sb contents were little bit higher than average Japanese river sediment values. Anthropogenic activities, prevalent in the study area play a key role in the accumulation of Zn and Pb in aquatic system. Early warning on the sediment pollution to respective authorities help in preserving the aquatic system from further degradation of the river.

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Polonium: Radionuclides

Alam¹,

Mohamed²

2005

Encyclopedia of Inorganic Chemistry

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All polonium isotopes are radioactive with only three having appreciable half‐lives: 208 Po, 209 Po, and 210 Po. It is a highly toxic element and is a health hazard if taken into the body. Polonium is a naturally occurring radionuclide and is present in the environment and in people at very low concentrations. Polonium concentrations in the environment can vary by orders of magnitude. 210 Po concentration in soil varies according to soil strata, depth, sedimentation and biological processes, fertilization and pH. Incomplete burning of fuels of coal loading plays an important role in the concentration of 210 Po in air. Usually, the activity concentration of 210 Po in surface air is low. Polonium can be separated by irradiating stable bismuth‐209 with thermal neutrons resulting in the formation of radioactive 210 Bi, which decays into 210 Po.

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Speciation of 210Po and 210Pb in air particulates determined by sequential extraction

Cited by 20 publications

References 20 publications

Impact of northern and southern air mass transport on the temporal distribution of atmospheric 210Po and 210Pb in the east coast of Johor, Malaysia

Impact of northern and southern air mass transport on the temporal distribution of atmospheric 210Po and 210Pb in the east coast of Johor, Malaysia

Rare Earth Elements and Geochemical Partitioning of Zn and Pb in Sediments of an Urban River

Polonium: Radionuclides

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