scholarly journals Geochemical features of the distribution of major and trace elements in sediments and soils of the Zarafshon River Valley

2021 ◽  
Author(s):  
Daler Abdusamadzoda ◽  
Djamshed Abdushukurov ◽  
Octavian Duliu ◽  
Inga Zinicovscaia ◽  
Pavel Nekhoroshkov
Keyword(s):  
Trace Elements ◽  
Terrestrial Ecosystems ◽  
Major And Trace Elements ◽  
Major Elements ◽  
River Valley ◽  
Careful Examination ◽  
Catchment Basin ◽  
Significant Similarity ◽  
Industrial Facilities ◽  
Soil Weathering

Abstract Purpose The aim of this research was to estimate impact of the geochemical features to distribution of major and trace elements in soil and sediments, assess of anthropogenic and natural factors in terrestrial ecosystems of Zarafshon. As well as to answer the common criticism of the water, soil and sediment pollution in Zarafshon. In this way this research will be reasonable substantial information about distribution of major and trace elements in mountains and piedmont regions. Materials and methods In view of a planned detailed investigation, and to get more data concerning the geochemistry of sediments and soils along the Zarafshon Valley of Western Tajikistan, as well as to assess of the local environmental situation, the mass fraction of eight major, rock-forming elements together with other 38 trace elements were determined by Instrumental Neutron Activation Analysis. To accomplish this task 116 samples of sediment and an equal number of soils were collected around the Tajik sector of the Zarafshon catchment basin and its main tributaries. Results and discussion Both major and trace elements proved a significant similarity between soil and sediments including potentially contaminating elements As, Sb and Hg, whose mass fractions showed in some places to be significantly higher. An analysis of the distribution of major elements oxides as well as of incompatible trace elements Sc, Zr, REE, Th, and U suggested that the analysed soil and sediments have rather a felsic origin. A more careful examination revealed a reduced degree of recycling and for some location, a certain degree of weathering. All these peculiarities could be ascribed to a vast investigated area spread onto a significant diversity of geological formations. Conclusion The process of soil weathering of the studied area takes place relatively quick, but mainly it's has a natural character rather. The high content of accumulation of major and trace element in the sediment also related to rock source but only in rare cases is it of an anthropogenic nature. Based on these results, it can be predicted that the seriously environmental threat was not observed in the Zarafshon river valley. The activities of industrial facilities cover only a small part of this region and their impacts on the ecological state of the Zarafshon river valley is very small.

scholarly journals Geochemistry of garnet megacrysts from the Mir kimberlite pipe (Yakutia) and the nature of prothokimberlite melt

2019 ◽  
Vol 486 (5) ◽  
pp. 583-587
Author(s):  
A. M. Agashev
Keyword(s):  
Trace Elements ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Negative Correlation ◽  
Kimberlite Pipe ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Incompatible Elements ◽  
Composition Study ◽  
Melt Composition

The paper presents the results of major and trace elements composition study of garnet megacrysts from Mir kimberlite pipe. On the major elements composition those garnets classified as low Cr and high Ti pyropes. Concentrations of TiO2 show a negative correlation with MgO и Cr2O3 contents in megacrysts composition. Fractional crystallization modeling indicates that the most appropriate melt to reproduce the garnet trace elements signatures is the melt of picritic composition. Composition of garnets crystallized from kimberlite melt do not correspond to observed natural garnets composition. Kimberlites contain less of Ti, Zr, Y and heavy REE (rare earth elements) but more of very incompatible elements such as light REE, Th, U, Nb, Ba then the model melt composition that necessary for garnet crystallization.

scholarly journals The distribution of the trace element contents in lignite and ash from Drama lignite deposit, using multivariate statistical analysis

2001 ◽  
Vol 34 (3) ◽  
pp. 1255
Author(s):  
S. PANILAS ◽  
G. HATZIYANNIS
Keyword(s):  
Trace Elements ◽  
Rare Earth ◽  
Statistical Analysis ◽  
Rare Earth Elements ◽  
Multivariate Statistical Analysis ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Geochemical Data ◽  
Multivariate Statistical ◽  
Inorganic Matter

Multivariate statistical analysis was used on existing geochemical data of the Drama lignite deposit, eastern Macedonia, Greece. Factor analysis with varimax rotation technique was applied to study the distribution of major, trace and rare earth elements in the lignite and 850°C lignitic ash, to find a small set of factors that could explain most of the geochemical variability. The study showed that major elements AI, Na, Κ, contained in the lignite samples, presented high correlation with most of the trace and rare earth elements. In 850°C lignitic ashes major and trace elements present different redistribution. Only Al remained correlated with the trace elements Co, Cr, Rb, Ta, Th, Ti, Sc and rare earths related with inorganic matter in the lignite beds. Trace elements Fe, Mo, U, V, W, and Lu were associated with organic matter of lignite and had also been affected by the depositional environment.

The Nutritional Value and Preliminary Risk Assessment of Major and Trace Elements Accumulated in 8 Edible Seaweeds

2013 ◽  
Vol 781-784 ◽  
pp. 1377-1384
Author(s):  
Ting Ting Feng ◽  
Hong Bo Chen ◽  
Ping Shao ◽  
Jin Zhe He
Keyword(s):  
Trace Elements ◽  
Nutritional Value ◽  
Toxic Elements ◽  
Porphyra Yezoensis ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Pollution Level ◽  
Nostoc Commune ◽  
Edible Seaweeds ◽  
Concentration Changes

16 major and trace elements content of 8 edible seaweeds were determined by ICP-AES after wet digestion to compare the nutritional value and pollution level between Cyanophyta (blue), Chlorophyta (green), Rhodophyta (red), Phaeophyta (brown) species. The concentration changes of trace elements in seaweeds had some differences from four species, but the concentration distribution tendency of trace elements was similar. Major elements ( K,Ca,Na,Mg,P) and functional elements (Fe,Mn,Zn,Cu,Se,Cr) were abundant in Cyanophyta (blue) and Phaeophyta (brown) species, these two species, however, accumulated Al selectively. The pollution levels of toxic elements like As, Pb and Hg in most seaweeds from this study demonstrated that the cultivation aquatic eco- environments were relatively safe. In this paper, Nostoc commune var. Flagelliforme (Cyanophyta) abounds in Fe, Zn and major elements, moreover the concentration of potentially toxic elements were relatively low. The second was Phaeophyta species, especially Laminaria japonica Aresch . Porphyra yezoensis Ueda (Rhodophyta) shows the lowest nutritional value.

scholarly journals Assessment of Major and Trace Elements in Drinking Groundwater in Bisha Area, Saudi Arabia

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Faleh Z. Alqahtani ◽  
Saifedin Y. DaifAllah ◽  
Yasir F. Alaryan ◽  
Abubakr M. Elkhaleefa ◽  
Eid I. Brima
Keyword(s):  
Trace Elements ◽  
Saudi Arabia ◽  
Inductively Coupled Plasma ◽  
Hard Water ◽  
Major And Trace Elements ◽  
Major Elements ◽  
World Health ◽  
Similar Distribution ◽  
Significant Difference ◽  
Health Organization

Drinking groundwater represents 30% of the world’s fresh water and 0.9% of the whole world’s water. Therefore, routine analysis and monitoring of the groundwater is a paramount issue, specifically the measurement of elemental concentrations due to aquifer characterization. Consequently, the purpose of this study was to determine major and trace elements in groundwater. In total, 25 samples of groundwater were collected from wells in the Bisha area, Asir province, Saudi Arabia. All samples were analyzed for major and trace elements by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). In total, 15 elements were measured including four major elements (Na, K, Mg, and Ca) and 11 trace elements (V, Cr, Mn, Co, Ni, Cu, Zn, As, Se, Cd, and Pb). Major elements (Na, Mg, and Ca) exceeded the guideline limits in some samples. In addition, only one trace element (Se) exceeded the World Health Organization (WHO) permissible limits in some samples. This could be due to rock characteristics in aquifers. Very hard water was shown in 92% of the samples. Moreover, a high percentage (32%) of the analyzed samples also exceeded the guideline levels for chloride. ANOVA analysis showed significant difference (p<0.05) between Bisha samples (North and South), Bisha samples (North), and the remaining samples, for V and pH, and Na, Cl−, EC, and TDS, respectively. No significant differences (p>0.05) were reported for Na, K, Mg, Ca, Cr, Mn, Co, Ni, Cu, Zn, As, Se, Cd, and Pb between all samples. In general, 25 significant (p>0.05) correlations were reported among the measured elements. For the positive correlations, similar distribution for the elements is anticipated. In conclusion, the groundwater in this study is not suitable for domestic use due to its hardness and only some are suitable for irrigation. More studies are needed to confirm our findings in the study area.

Major and trace elements in organically or conventionally produced milk

2005 ◽  
Vol 72 (3) ◽  
pp. 362-368 ◽  
Author(s):  
John E Hermansen ◽  
Jens H Badsberg ◽  
Troels Kristensen ◽  
Vagn Gundersen
Keyword(s):  
Trace Elements ◽  
Inductively Coupled Plasma ◽  
Production Systems ◽  
Atomic Emission ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission Spectrometry ◽  
Inductively Coupled ◽  
Few Data

A total of 480 samples of milk from 10 organically and 10 conventionally producing dairy farms in Denmark and covering 8 sampling periods over 1 year (triplicate samplings) were analysed for 45 trace elements and 6 major elements by high-resolution inductively coupled plasma mass spectrometry and inductively coupled plasma atomic emission spectrometry. Sampling, sample preparation, and analysis of the samples were performed under carefully controlled contamination-free conditions. The dairy cattle breeds were Danish-Holstein or Jersey. Sources of variance were quantified, and differences between production systems and breeds were tested. The major source of variation for most elements was week of sampling. Concentrations of Al, Cu, Fe, Mo, Rb, Se, and Zn were within published ranges. Concentrations of As, Cd, Cr, Mn and Pb were lower, and concentrations of Co and Sr were higher than published ranges. Compared with Holsteins, Jerseys produced milk with higher concentrations of Ba, Ca, Cu, Fe, Mg, Mn, Mo, P, Rh, and Zn and with a lower concentration of Bi. The organically produced milk, compared with conventionally produced milk, contained a significantly higher concentration of Mo (48 v. 37 ng/g) and a lower concentration of Ba (43 v. 62 ng/g), Eu (4 v. 7 ng/g), Mn (16 v. 20 ng/g) and Zn (4400 v. 5150 ng/g respectively). The investigation yielded typical concentrations for the following trace elements in milk, for which no or very few data are available: Ba, Bi, Ce, Cs, Eu, Ga, Gd, In, La, Nb, Nd, Pd, Pr, Rh, Sb, Sm, Tb, Te, Th, Ti, Tl, U, V, Y, and Zr.

scholarly journals MK-1 Orthopyroxene—A New Potential Reference Material for In-Situ Microanalysis

Minerals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1321
Author(s):  
Lihui Jia ◽  
Qian Mao ◽  
Bin Su ◽  
Shitou Wu ◽  
Liangliang Huang ◽  
...  
Keyword(s):  
Trace Elements ◽  
Reference Material ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Metamorphic Belt ◽  
Ultramafic Intrusion ◽  
Binocular Microscope ◽  
Good Agreement

Orthopyroxene, an important phase in mantle-derived rocks, has become a powerful tool to unravel mantle nature and magma processes. However, the applications have been hindered by the lag in the development of analytical techniques, such as shortage of reference materials. Orthopyroxene grains derived from an ultramafic intrusion at the Mogok metamorphic belt (Myanmar) were evaluated for the potential use of orthopyroxene as a reference material for in-situ microanalysis. Approximately 20 g of 0.5–3 mm pure orthopyroxene grains were separated under binocular microscope and analyzed using EPMA, LA-ICPMS, and bulk analytical methods (XRD, XRF, and solution-ICPMS) for major and trace elements at four institutions. Eleven core-to-rim profiles carried out using EPMA and twelve core-to-rim profiles determined using LA-ICPMS suggest that MK-1 orthopyroxene grains are sufficiently homogeneous, with RSD < ±2% (1σ) for major elements (Mg, Si, and Fe) and RSD < ±10% (1σ) for trace elements (Na, Al, Ca, Ti, Cr, Co, Zn, Ni, Mn, Sc, and V). In addition, the composition of MK-1 orthopyroxene was also measured by XRF and solution-ICPMS measurements in two different laboratories, to compare with the results measured using EPMA and LA-ICPMS. The results indicated a good agreement with RSE < ±2% (1σ) for major elements and RSE < ±5% (1σ) for most trace elements, except for Na (±9.73%) and Ti (±6.80%). In an overall assessment of these data, MK-1 orthopyroxene can be considered as a reference material for in-situ microanalysis, which would provide solid trace elements data for a better understanding of mantle source and magmatic evolution.

An Elemental Analysis of Different CD-R discs

2014 ◽  
Vol 5 (1) ◽  
pp. 752-756
Author(s):  
Amir Pishkoo
Keyword(s):  
Trace Elements ◽  
Elemental Analysis ◽  
Rutherford Backscattering Spectrometry ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Rutherford Backscattering ◽  
X Ray ◽  
Non Destructive ◽  
Non Destructive Techniques

In this study Proton Induced X-ray Emission (PIXE) and Rutherford Backscattering Spectrometry (RBS) as reliable and non-destructive techniques has been applied to compare thickness, major and trace elements of different brands of CD-R discs. Three elements, namely Ag, Ba, and Ti were found to be the major elements.

Composition Typomorphic Characteristics of Pyrite in Various Genetic Type Gold Deposits

2012 ◽  
Vol 463-464 ◽  
pp. 25-29 ◽  
Author(s):  
Yu Tong Yan ◽  
Sheng Rong Li ◽  
Bao Jian Jia ◽  
Na Zhang ◽  
Liang Jiang ◽  
...  
Keyword(s):  
Trace Elements ◽  
Gold Deposit ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Gold Deposits ◽  
Genetic Type ◽  
Distribution Characteristics ◽  
Genetic Studies ◽  
Different Types ◽  
Gold Bearing

Pyrite is an ordinary mineral which appears in different types of deposits and it is an important gold-bearing mineral in gold deposits. Through studying the composition typomorphic characteristics of pyrite, we have achieved some genesis information. However, the study on pyrite composition typomorphism in different genesis gold deposits is rare. The paper studied major and trace elements of pyrite of different genetic deposits by using δFe—δS, δFe/δS—As, (Fe+S)—As and Co—Ni—As plot method and achieved major elements characteristics of different deposits. The results show that each genetic type gold deposit has its typical characteristics. This result are well applicable to genetic studies of pyrite in gold deposits and the distribution characteristics are helpful for studying pyrite in gold deposits

scholarly journals Seasonal Variation and Quality Assessment of the Major and Trace Elements of Atmospheric Dust in a Typical Karst City, Southwest China

2019 ◽  
Vol 16 (3) ◽  
pp. 325 ◽  
Author(s):  
Yang Tang ◽  
Guilin Han
Keyword(s):  
Trace Elements ◽  
Urban Areas ◽  
Motor Vehicle ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Atmospheric Dust ◽  
Motor Vehicle Emissions ◽  
One Year ◽  
Autumn And Winter ◽  
Guiyang City

Atmospheric dust plays an important role in bio-geochemical cycling and the ecological environment. In urban areas, atmospheric dust is more likely to be the carrier of pollutants, thus affecting the air quality of cities. In this study, samples of atmospheric dust were collected monthly for one year in Guiyang City, and the contents of major and trace elements in the dust were determined. The results showed that the major and trace elements in the atmospheric dust of Guiyang city vary with the seasons. The concentrations of trace elements in the dust of autumn and winter were significantly higher than those in spring and summer. Most of the major elements in dust were higher than those in the corresponding topsoil, while most trace elements were similar to those in the topsoil except for Pb. The enrichment factor (EF) values calculated by topsoil as background showed that the Ca and Pb have higher EF values than the rest elements, indicating that some dust may be contaminated by Ca and Pb. The high content of Ca in the dust might be derived from concrete buildings in urban areas, while Pb might be closely related to motor vehicle emissions. The relationship between La and Yb of the atmospheric dust showed that the dust in Guiyang have the same pattern as those of Libo, it also revealed that these dust probably come mainly from natural sources and are less affected by human activities.

scholarly journals Minerals, Toxic Heavy Metals, and Antioxidant Properties of Honeys from Bangladesh

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Sudip Paul ◽  
Md. Sakib Hossen ◽  
E. M. Tanvir ◽  
Rizwana Afroz ◽  
Delwar Hossen ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Antioxidant Properties ◽  
Major And Trace Elements ◽  
Major Elements ◽  
Lead Contamination ◽  
Toxic Heavy Metals ◽  
Sodium Potassium ◽  
Nutritional Values ◽  
Raw Honey

The study reports on major and trace elements as well as antioxidant properties of honey samples from Bangladesh. Four major cationic elements, seven trace elements, and three heavy metals were determined in the 12 honey samples using atomic absorption spectrophotometer. Nutritional values in these honey samples were further investigated according to their antioxidant properties. The content of major elements was in the range of 62.75–616.58, 579.48–2219.43, 69.42–632.25, and 0.13–1.20 mg/kg for sodium, potassium, magnesium, and calcium, respectively. The trace elements varied in the range of 0.41–28, 0.12–3.54, 1.54–2.85, 0.29–0.59, 0.02–0.35, and 0.01–0.06 mg/kg for iron, zinc, copper, nickel, cobalt, and cadmium, respectively. Among the heavy metals, only lead (0.17–2.19 mg/kg) was detected. The results of antioxidant analysis based on phenolics, flavonoids, ascorbic acid, reducing sugar, and proteins (as nonphenolic antioxidants) revealed that multifloral raw honey samples contain significantly higher levels of reducing agents than monofloral and commercial brand honeys. The study provides a useful insight on the minerals, heavy metals, and antioxidant properties of honey samples commonly consumed in Bangladesh and found to be rich source of antioxidants and minerals. Some samples might pose some risk to the health due to lead contamination.

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