scholarly journals Assessment of mercury pollution sources in beach sand and coastal soil by speciation analysis

2019 ◽  
Vol 31 (1) ◽  
Author(s):  
José Luis R. Gallego ◽  
Maria Antonia López-Antón ◽  
Deva Martínez de la Rosa ◽  
Eduardo Rodríguez-Valdés ◽  
Nerea García-González ◽  
...  
Keyword(s):  
Thermal Desorption ◽  
Inorganic Mercury ◽  
Coastal Region ◽  
Speciation Analysis ◽  
Beach Sand ◽  
Mercury Species ◽  
Mercury Oxide ◽  
Icp Ms ◽  
Soils And Sediments ◽  
Beach Sands

Abstract Background An essential requisite for controlling and monitoring mercury in the environment is to identify its species in different types of soils and sediments, as this will help not only to establish its mobility in the environment and ecosystem and the degree of its toxicity, but also to establish the source of contamination. The objective of this work was to identify the origin of mercury in beach sands and soil taken from a coastal region with previously high mining and industrial activity by characterizing the mercury species using the technique known as thermal desorption (HgTPD). Results Apart from quartz, the main mineral species identified in the raw sands and soil were calcite, fluorite and barite. The concentration of mercury ranges from 5 to 23 µg g−1, and although it is distributed in different proportions in the function of the size, thermal desorption profiles demonstrated that the mercury species present in the samples do not vary with the mercury concentration and the particle size. By means of HgTPD, mercury oxide (HgO) was identified in the beach sands, whereas mercury sulfide (HgS) was found in the soil sample taken from the vicinity of the beach. Complementary methodologies foster the HgTPD conclusions and verify that mercury is present mostly in insoluble stable (HgS) or low-mobility (HgO) forms in the samples studied. Analyses by ICP-MS after sequential extraction and HPLC separation of mercury species show that inorganic mercury is the predominant form in the samples. Conclusions The technique HgTPD is a very useful tool to ascertain the origin of mercury in contaminated beach sands and shoreline soils. In the particular area studied in this work, the species identified indicate that previous mining activity was the source of the mercury and rule out the possibility that contamination is derived from coal combustion activities ongoing in the region.

scholarly journals Mercury determination and speciation analysis in surface waters

2012 ◽  
Vol 10 (4) ◽  
pp. 1175-1182 ◽  
Author(s):  
Elisaveta Mladenova ◽  
Ivanka Dakova ◽  
Dimiter Tsalev ◽  
Irina Karadjova
Keyword(s):  
Surface Waters ◽  
Inductively Coupled Plasma ◽  
Mechanical Stability ◽  
Solid Phase ◽  
Chemical Vapor ◽  
Speciation Analysis ◽  
Regeneration Ability ◽  
Mercury Species ◽  
Icp Ms ◽  
Relative Standard

AbstractA sorbent L-cysteine grafted silica gel has been evaluated for separation and enrichment of dissolved inorganic i-Hg(II) and methylmercury CH3Hg(I) from surface waters at sub-µg L−1 concentrations. Chemical parameters for mercury species enrichment and separation have been optimized. Analytical schemes for the determination of Hg species, using selective column solid phase extraction (SPE) with continuous flow chemical vapor generation atomic absorption spectrometry (CF-CVG-AAS) or inductively coupled plasma-mass spectrometry (ICP-MS) were developed. Possibilities for on-site SPE enrichment were demonstrated as well. The limits of quantification were 1.5 and 5 ng L−1 for dissolved i-Hg(II) and CH3Hg(I) by CF-CVG-AAS and 1 and 2.5 ng L−1 by ICP-MS with relative standard deviations between 7–12% and 7–14%, respectively. The chemically modified SPE sorbent has demonstrated high regeneration ability, chemical and mechanical stability, acceptable capacity and good enrichment factors. Results for total dissolved mercury were in reasonable agreement with those from independent analyses by direct ICP-MS determinations for river waters and for estuarine water certified reference material.

scholarly journals Sequential extraction and thermal desorption of mercury from contaminated soil and tailings from Mongolia

2012 ◽  
Vol 10 (5) ◽  
pp. 1565-1573 ◽  
Author(s):  
Pavel Coufalík ◽  
Pavel Krásenský ◽  
Marek Dosbaba ◽  
Josef Komárek
Keyword(s):  
Sequential Extraction ◽  
Thermal Desorption ◽  
Solid Phase ◽  
Extraction Procedure ◽  
Speciation Analysis ◽  
Water Soluble ◽  
Mercury Species ◽  
Different Temperatures ◽  
Acidic Conditions ◽  
Desorption Method

AbstractMercury forms in contaminated environmental samples were studied by means of sequential extraction and thermal desorption from the solid phase. The sequential extraction procedure involved the following fractions: water soluble mercury, mercury extracted in acidic conditions, mercury bound to humic substances, elemental Hg and mercury bound to complexes, HgS, and residual mercury. In addition to sequential extraction, the distribution of mercury species as a function of soil particles size was studied. The thermal desorption method is based on the thermal decomposition or desorption of Hg compounds at different temperatures. The following four species were observed: Hg0, HgCl2, HgS and Hg(II) bound to humic acids. The Hg release curves from artificial soils and real samples were obtained and their applicability to the speciation analysis was considered.

scholarly journals Determination of organic and inorganic mercury species in water and sediment samples by HPLC on-line coupled with ICP-MS

Talanta ◽  
2009 ◽  
Vol 80 (1) ◽  
pp. 207-211 ◽  
Author(s):  
José Soares dos Santos ◽  
Miguel de la Guárdia ◽  
Augustin Pastor ◽  
Maria Lúcia Pires dos Santos
Keyword(s):  
Inorganic Mercury ◽  
Mercury Species ◽  
Sediment Samples ◽  
Water And Sediment ◽  
Icp Ms ◽  
On Line ◽  
Water And Sediment Samples

UNCERTAINTY EVALUATION IN DOSE ASSESSMENT DUE TO SPATIAL DISTRIBUTION OF NORM IN BEACH SANDS OF SOUTHEAST COAST OF INDIA: A PROBABILISTIC APPROACH

2019 ◽  
Vol 187 (4) ◽  
pp. 482-498
Author(s):  
S Chandrasekaran ◽  
G Sankaran Pillai ◽  
R Baskaran ◽  
B Venkatraman
Keyword(s):  
Probabilistic Approach ◽  
Coastal Region ◽  
Dose Assessment ◽  
Beach Sand ◽  
Uncertainty Evaluation ◽  
Activity Levels ◽  
High Background ◽  
Southeast Coast ◽  
Radionuclide Distribution ◽  
Beach Sands

Abstract A study on radionuclide distribution along coastal stretch in high background areas is constantly attracted to many researchers around the world. In the present study, the concentration of radionuclides in beach sands along the southeast coastal region of India has been studied in detail. Concentration of radionuclides is measured using gamma spectrometry at 148 pre-determined locations. It is found that 238U and 232Th concentrations are varying in the range from 3 (BDL) to 298.9 and 1150.2 Bq kg−1, respectively. Concentration of 40K in beach sand varied from 11 to 1743.4 Bq kg−1. The measured activity levels of radionuclides were compared with earlier studies carried out by various researchers in the same region under study. The related radiological parameters of interest were also determined and compared with the internationally recommended values. With an increase in emphasis on quality in dose assessment methods, dose to human population living in the vicinity requires uncertainty evaluation, which is carried out by taking into account variation in the activity values. This study would serve as a baseline radiological mapping for the southeast coast region of India for environmental impact assessment prior to plan of nuclear facility in the future.

scholarly journals Determination of mercury species in foodstuffs using LC-ICP-MS: the applicability and limitations of the method 

2014 ◽  
Vol 32 (No. 3) ◽  
pp. 249-259 ◽  
Author(s):  
R. Koplík ◽  
I. Klimešová ◽  
K. Mališová ◽  
O. Mestek
Keyword(s):  
Hydrochloric Acid ◽  
Inductively Coupled Plasma ◽  
Speciation Analysis ◽  
Reversed Phase ◽  
Food Samples ◽  
Partial Hydrolysis ◽  
Mercury Species ◽  
Plant Materials ◽  
Icp Ms

Reversed-phase liquid chromatography hyphenated with inductively coupled plasma mass spectrometry (LC-ICP-MS) was used for mercury speciation analysis in food samples. A short chromatographic column (Purospher<sup>&reg;</sup> RP-8e, 75 &acute; 4&nbsp;mm, 3 &micro;m) and a mobile phase containing 0.02 mol/l CH<sub>3</sub>COONH<sub>4</sub> + 0.2% (v/v) 2-mercaptoethanol (2-ME) + 1% (v/v) CH<sub>3</sub>OH were applied. A repeated extraction of samples with hydrochloric acid/2-ME solution (1 mol/l HCl + 0.2% (v/v) 2-ME) was applied as the isolation step. The results were satisfactory for most food matrices (fish, shellfish, plant materials). Conversely, to analyse high-protein animal matrices, which contain mostly the inorganic form of mercury, a procedure including partial hydrolysis using hydrochloric acid should be used. For methylmercury and inorganic divalent mercury, the LOQ values of 0.3 and 2 ng/g, respectively, can be achieved if precautionary measures against contamination are fulfilled. The method was applied for the determination of methylmercury and inorganic divalent mercury in fish, vegetables, herbs and cereal products.

Determination of mercury species using thermal desorption analysis in AAS

2014 ◽  
Vol 68 (4) ◽  
Author(s):  
Pavel Coufalík ◽  
Ondřej Zvěřina ◽  
Josef Komárek
Keyword(s):  
Thermal Desorption ◽  
Contaminated Soils ◽  
Inorganic Mercury ◽  
Absorption Spectrometry ◽  
Thermal Method ◽  
Mercury Species ◽  
The Czech Republic ◽  
The Stability ◽  
Thermal Desorption Analysis

AbstractAnalytical aspects of the determination of inorganic mercury (Hg) species by thermal desorption followed by atomic absorption spectrometry (AAS) detection were investigated in this work. Characteristic Hg release curves of the following species were observed: Hg0, HgCl2, HgO, HgSO4, HgS, and the Hg bound to humic acids. Particular attention was dedicated to the thermal stability and change of bond of Hg0 in the following matrices: sand, kaolinite, granite, peat, power plant ash, and soil. The bond of elemental Hg in environmental materials was described on basis of this experiment. Contaminated soil samples from two locations in the Czech Republic were investigated by thermal desorption analysis. Afterwards, the contents of volatile and plant-available Hg in the studied samples were determined. The determination of Hg0 using the thermal method was related to the results of liquid sequential extraction. The development of Hg speciation and the stability of Hg were assessed on basis of the data obtained. Thus, the analytical procedure used is a suitable tool for the study of inorganic Hg species in contaminated soils.

scholarly journals The Prevalence of Inorganic Mercury in Human Kidneys Suggests a Role for Toxic Metals in Essential Hypertension

Toxics ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 67
Author(s):  
Roger Pamphlett ◽  
Philip A. Doble ◽  
David P. Bishop
Keyword(s):  
Essential Hypertension ◽  
Toxic Metals ◽  
Inductively Coupled Plasma ◽  
Dominant Role ◽  
Inorganic Mercury ◽  
Experimental Studies ◽  
Human Kidney ◽  
Proximal Tubules ◽  
Age Related ◽  
Icp Ms

The kidney plays a dominant role in the pathogenesis of essential hypertension, but the initial pathogenic events in the kidney leading to hypertension are not known. Exposure to mercury has been linked to many diseases including hypertension in epidemiological and experimental studies, so we studied the distribution and prevalence of mercury in the human kidney. Paraffin sections of kidneys were available from 129 people ranging in age from 1 to 104 years who had forensic/coronial autopsies. One individual had injected himself with metallic mercury, the other 128 were from varied clinicopathological backgrounds without known exposure to mercury. Sections were stained for inorganic mercury using autometallography. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) was used on six samples to confirm the presence of autometallography-detected mercury and to look for other toxic metals. In the 128 people without known mercury exposure, mercury was found in: (1) proximal tubules of the cortex and Henle thin loops of the medulla, in 25% of kidneys (and also in the man who injected himself with mercury), (2) proximal tubules only in 16% of kidneys, and (3) Henle thin loops only in 23% of kidneys. The age-related proportion of people who had any mercury in their kidney was 0% at 1–20 years, 66% at 21–40 years, 77% at 41–60 years, 84% at 61–80 years, and 64% at 81–104 years. LA-ICP-MS confirmed the presence of mercury in samples staining with autometallography and showed cadmium, lead, iron, nickel, and silver in some kidneys. In conclusion, mercury is found commonly in the adult human kidney, where it appears to accumulate in proximal tubules and Henle thin loops until an advanced age. Dysfunctions of both these cortical and medullary regions have been implicated in the pathogenesis of essential hypertension, so these findings suggest that further studies of the effects of mercury on blood pressure are warranted.

scholarly journals Genetic Polymorphisms in Glutathione (GSH-) Related Genes Affect the Plasmatic Hg/Whole Blood Hg Partitioning and the Distribution between Inorganic and Methylmercury Levels in Plasma Collected from a Fish-Eating Population

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Andréia Ávila Soares de Oliveira ◽  
Marilesia Ferreira de Souza ◽  
André van Helvoort Lengert ◽  
Marcelo Tempesta de Oliveira ◽  
Rossana Batista de Oliveira Godoy Camargo ◽  
...  
Keyword(s):  
Genetic Polymorphisms ◽  
Whole Blood ◽  
Fish Consumption ◽  
Multivariate Analyses ◽  
Mercury Species ◽  
Icp Ms ◽  
Total Hg ◽  
Pcr Assays ◽  
Plasma Compartment

This study aims to evaluate the effects of polymorphisms in glutathione (GSH-) related genes (GSTM1,GSTT1,GSTP1,GCLM, andGCLC) in the distribution of Hg in the blood compartments in humans exposed to methylmercury (MeHg). Subjects (n=88), exposed to MeHg from fish consumption, were enrolled in the study. Hg species in the plasma compartment were determined by LC-ICP-MS, whereas genotyping was performed by PCR assays. Mean total Hg levels in plasma (THgP) and whole blood (THgB) were10±4.2and37±21, whereas mean evels of plasmatic MeHg (MeHgP), inorganic Hg (IHgP), and HgP/HgB were4.3±2.9,5.8±2.3 µg/L, and0.33±0.15, respectively.GSTM1andGCLCpolymorphisms influence THgP and MeHgP (multivariate analyses,P<0.050). Null homozygotes forGSTM1showed higher THgP and MeHgP levels compared to subjects withGSTM1(THgPβ=0.22,P=0.035; MeHgPβ=0.30,P=0.050) and persons carrying at least one T allele forGCLChad significant higher MeHgP (β=0.59,P=0.046). Also, polymorphicGCLMsubjects had lower THgP/THgB than those with the nonvariant genotype. Taken together, data of this study suggest that GSH-related polymorphisms may change the metabolism of MeHg by modifying the distribution of mercury species iin plasma compartment and the HgP/HgB partitioning.

Sign in / Sign up

Export Citation Format

Share Document