Profile distribution of As(III) and As(V) species in soil and groundwater in Bozanta area

2007 ◽  
Vol 61 (3) ◽  
Author(s):  
T. Frentiu ◽  
S. Vlad ◽  
M. Ponta ◽  
C. Baciu ◽  
I. Kasler ◽  
...  
Keyword(s):  
Soil Ph ◽  
Total Concentration ◽  
Total Content ◽  
Arsenic Species ◽  
Residual Fraction ◽  
Trigger Level ◽  
Maximum Contaminant Level ◽  
Arsenic In Groundwater ◽  
Baia Mare ◽  
Profile Distribution

AbstractThe profile distribution of arsenic(III) and arsenic(V) species in soil and groundwater was investigated in the samples collected in 2005 from a hand-drilled well, in the Bozanta area, Baia Mare region, Romania. The total content of arsenic in the soil was in the range of 525–672 mg kg−1 exceeding 21–27 times the action trigger level for sensitive soil. 0.9–11.3 % of the total content was soluble in water, 83.0–92.6 % in 10 mol dm−3 HCl and 2.6–13.3 % was the residual fraction. Arsenic(V) was the dominant arsenic species in the soil in the range of 405–580 mg kg−1. The distribution and mobility of arsenic species was governed by soil pH and contents of Al, Fe, and Mn. The mobility of arsenic(V) decreased with depth, while that of arsenic(III) was high at the surface and in the proximity of groundwater. The total concentration of arsenic in groundwater was (43.40 ± 1.70) µg dm−3, which exceeded the maximum contaminant level of 10 µg dm−3.

scholarly journals Data on the elemental composition (mobile fractions and total content) of soils in catena at the SE Valdai Hills, Russia

2021 ◽  
Author(s):  
Polina Enchilik ◽  
Ivan Semenkov ◽  
Nikolay Kasimov
Keyword(s):  
Deciduous Forest ◽  
Ph Value ◽  
Chemical Elements ◽  
Total Concentration ◽  
Total Content ◽  
Residual Fraction ◽  
Organic Carbon Content ◽  
Acer Platanoides ◽  
Forest Reserve ◽  
Particle Size Classes

Abstract. This study presents a dataset on seasonal soils sampling from September 2016 to May 2018 in the southern part of the Central Forest Reserve (SE Valdai Hills) within a catena with Endocalcaric Albic Glossic Stagnic Profondic Retisols (Cutanic, Loamic) and Albic Gleyic Histic Retisols (Cutanic, Loamic) under coniferous-deciduous forest (Tília cordáta, Pícea ábies, Ácer platanoídes) on loess-like loams underlain by carbonate moraine deposits. 152 soil samples were taken to define total concentration of 67 chemical elements (ChEs), content of three mobile fractions (exchangeable, bound within organo-mineral complexes, bound with Fe and Mn hydroxides) of 69 ChEs and content of residual fraction, including macro elements (Al, Ca, Fe, K, Mg, Mn, Na, P, Ti, S, Si), heavy metals (Ba, Co, Cr, Cu, Ni, Pb, Rb, Sr, Th, U, V, Zn), trace elements (Ag, As, B, Be, Bi, Br, Cd, Cs, Ge, Hf, Li, Mo, Nb, Pd, Sb, Sc, Se, Sn, Ta, Te, Tl,W, Zr) and rare earth elements (Ce, Er, Eu, Gd, La, Lu, Nd, Pr, Sm, Tb, Tm, Dy, Ho, Y, Yb). We measured pH-value, total organic carbon content (TOC), seven particle-size classes (

scholarly journals Chemical speciation of trace metals in the industrial sludge of Dhaka City, Bangladesh

2017 ◽  
Vol 76 (2) ◽  
pp. 256-267 ◽  
Author(s):  
Md. Saiful Islam ◽  
Md. Habibullah Al-Mamun ◽  
Ye Feng ◽  
Masahiro Tokumura ◽  
Shigeki Masunaga
Keyword(s):  
Trace Metals ◽  
Inductively Coupled Plasma ◽  
Total Concentration ◽  
Total Content ◽  
Residual Fraction ◽  
Chemical Fractionation ◽  
Dhaka City ◽  
Bcr Sequential Extraction ◽  
Inductively Coupled ◽  
Plasma Mass Spectrometry

The objective of this study was to assess total concentration and chemical fractionation of trace metals in the industrial wastewater and sludge collected from seven different types of industries in Dhaka City, Bangladesh. The sludge from industries is either dumped on landfills or reused as secondary resources in order to preserve natural resources. Metals were analyzed using inductively coupled plasma mass spectrometry (ICP-MS). The ranges of Cr, Ni, Cu, As, Cd, and Pb in the sludges were 1.4–9,470, 4.8–994, 12.8–444, 2.2–224, 1.9–46.0 and 1.3–87.0 mg/kg, respectively. As a whole, the average concentrations of trace metals in samples were in the decreasing order of Cr > Ni > Cu > As > Pb > Cd. The results of the Community Bureau of Reference (BCR) sequential extraction showed that the studied metals were predominantly associated with the residual fraction followed by the oxidizable fraction. The study revealed that the mobile fractions of trace metals are poorly predictable from the total content, and bioavailability of all fractions of elements tends to decrease.

scholarly journals Quantification and Speciation of Lead, Cadmium and Chromium in Dandora Dumpsite Soils

2020 ◽  
pp. 9-15
Author(s):  
P. M. Kahara ◽  
J. Murungi ◽  
J. K. Kiptoo ◽  
G. Nyaga
Keyword(s):  
Heavy Metals ◽  
Soil Profile ◽  
Total Concentration ◽  
Extraction Procedure ◽  
Total Content ◽  
Residual Fraction ◽  
Soil Profiles ◽  
Bcr Sequential Extraction ◽  
Lead And Cadmium ◽  
Flame Atomic Absorption

Open dumpsites are one of the main sources of heavy metals and as a result, lots of research has been undertaken on the pseudo-total content of heavy metals in dumpsite soils, but little research on the forms in which they exist. The current research was carried out to determine levels of chromium, lead and cadmium in the various fractions of Dandora dumpsite soil and how they are fractionated in the topsoil and subsoil horizons. Samples were obtained from eight sites with depths of (0-30 cm) and (30-60 cm) for topsoil and bottom soils respectively. The modified Community Bureau of Reference (BCR) sequential extraction procedure was used and metal analysis performed using flame atomic absorption spectrophotometry. The metals (lead, chromium and cadmium) total concentration (µg/g) in the upper soil profile ranged from 42.22 to 1096.21, 38.26 to 180.60 and 11.23 to 44.22 while the lower soil profiles were 54.19 to 239.28, 30.56 to 76.48 and 9.47 to 22.56, respectively. The concentration of lead in various fractions of the upper soil profile followed the order; reducible > oxidisable > residual > exchangeable, while that of chromium was residual > oxidisable > reducible > exchangeable. Cadmium followed the order exchangeable > residual > reducible > oxidisable. The percentage of the metals in non-residual fraction were Pb (78%), Cr (58.7%) and Cd (70%). Their mobility factors were (Pb) 39.7 (Cr) 7.75 and (Cd) 5.02 in the upper soil profiles. Thus, the results suggest that Dandora dumpsite is highly polluted with the selected heavy metals.

Metallic pollution in clogging materials of urban porous pavements

1995 ◽  
Vol 32 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Valérie Colandini ◽  
Michel Legret ◽  
Yves Brosseaud ◽  
Jean-Daniel Baladès
Keyword(s):  
Heavy Metal ◽  
Particle Size ◽  
Road Traffic ◽  
Total Concentration ◽  
Extraction Procedure ◽  
Interaction Strength ◽  
Metal Mobility ◽  
Residual Fraction ◽  
Metal Contents ◽  
Copper Zinc

Porous pavements infiltrated with stormwater are faced with clogging problems: runoff particles seep and clog the pervious surface layer of these structures. Clogging material samples (in the form of sludge) have been collected in cleaning operations on the pervious asphalt. This study aims at characterizing these materials, particle size distribution, heavy metal contents by particle size, and studying interactions between metals and particles. A sequential extraction procedure proposed by the experts of the Community Bureau of Reference (B.C.R.) was applied to provide information about heavy metal distribution on particles and to evaluate interaction strength, and consequently potential metal mobility when chemical variations occurred in the environment. Mainly made up of sand, the materials are polluted with lead, copper, zinc and cadmium. The concentrations appeared to be linked with road traffic intensity. The heavy metal contents by particle size showed that the finer are the particles, the higher are the heavy metal concentrations. Heavy metals were found potentially labile; metals contents in the residual fraction (mineral fraction) represented less than 20 % of the total concentration. Cadmium and zinc were apparently more labile than lead and copper.

scholarly journals Geochemical Fractions of Heavy Metals in Bottom Sediments of the Pobeda Hydrothermal Field, Mid-Atlantic Ridge (17°07′–17°08′ N)

2021 ◽  
Vol 6 (1) ◽  
pp. 14
Author(s):  
Liudmila Demina ◽  
Irina Gablina ◽  
Olga Dara ◽  
Dmitry Budko ◽  
Nina Gorkova ◽  
...  
Keyword(s):  
Total Content ◽  
Element Distribution ◽  
Hydrothermal Field ◽  
Residual Fraction ◽  
Carbonate Sediments ◽  
Metalliferous Sediments ◽  
Geochemical Fractions ◽  
Metalliferous Sediment ◽  
Fe And Mn ◽  
Mid Atlantic Ridge

We examined the distribution of Fe, Mn, Cu, Zn, and Pb in one core of metalliferous, and one core of non-mineralized (background) carbonate sediments (located 69 km northwards), from the Pobeda hydrothermal field. Mechanisms of metal accumulation in sediments (12 samples) were evaluated based on sequential extraction of geochemical fractions, including mobile (exchangeable complex, authigenic Fe-Mn hydroxides, and sulfides), and lithogenic (fixed in crystalline lattices) forms. Maps of element distribution in sediment components were obtained using a scanning electron microscope equipped with an energy-dispersive spectrometry detector. In metalliferous sediments, according to X-ray diffraction data, the main Fe mineral phase was goethite FeOOH (37–44% on a carbonate-free basis). The contents of Fe and Mn reached 31.6 and 0.18%, respectively, whereas concentrations of Cu, Zn and Pb were 0.98, 0.36, and 0.059%. The coefficient of metal enrichment relative to background values varied from 16 to 125 times. The exception was Mn, for which no increased accumulation was recorded. Essential mass of Fe (up to 70% of total content) was represented by the residual fraction composed of crystallized goethite, aluminosilicates, the minerals derived from bedrock destruction processes. Among geochemically mobile fractions, 90–97% of total Fe was found in the form of authigenic oxyhydroxides. The same fraction was the predominant host for Mn in both metalliferous and background sediments (55–85%). A total of 40–96 % of Cd, Cu, Zn, and Pb were associated with these Fe and Mn fractions. The sulfide fraction amounted to roughly 10% of each metal. In metalliferous sediment core, the maximum concentrations of metals and their geochemically mobile fractions were recorded in deeper core intercepts, an observation that might be attributed to influence of hydrothermal diffused fluids. Our data suggested that metals are mostly accumulated in carbonate sediments in their contact zone with the underlying serpentinized basalts.

Research on the Morphological of Lead and Zinc in the Smelting Slag

2015 ◽  
Vol 1088 ◽  
pp. 200-205
Author(s):  
Lin Yu ◽  
Dong Wei Li
Keyword(s):  
Heavy Metals ◽  
Sequential Extraction ◽  
Ecological Risk ◽  
Total Content ◽  
Residual Fraction ◽  
Bcr Sequential Extraction ◽  
Lead And Zinc ◽  
Smelting Slag ◽  
Reducible Fraction

In this paper analysed the forms of heavy metals (Zn Pb Cd and As) of the Smelting Slag for Lead and Zinc,using BCR sequential extraction. Different chemical morphological of heavy metals have different activity and harmfulness. Migration and Utilization of heavy metals were decided by the existent form of heavy metals in the soil,which influenced Bioactivity and Toxicity. The results show that the main forms of Zn and Cd are Oxidizable and Residual fraction, and Pb mainly occurred in Oxidizable and Reducible fraction. however, As mainly occurred in Residual fraction, which the percentage of reachs 99.56%. According to the percentage of fractions extracted in total content (As is 0.44%, Zn is 14.7%, Pb is 85.98%, Cd is 48.86%),the latent ecological risk of heavy metals varied in the descending order of,Pb Cd Zn and As.

scholarly journals Transient Responses of the Hepatic Lipidome to Acute Exercise Bouts in Mice

2020 ◽  
Author(s):  
Gregory C Henderson ◽  
Valeria P Martinez Tenorio ◽  
Marc A Tuazon
Keyword(s):  
Acute Exercise ◽  
Total Concentration ◽  
Acyl Chain ◽  
Total Content ◽  
Lipid Classes ◽  
Hepatic Lipid Metabolism ◽  
Interval Exercise ◽  
Single Bout ◽  
High Intensity Interval ◽  
The Relationship

Abstract BACKGROUND: The content of triacylglycerol (TAG) in the liver is known to rapidly increase after a single bout of exercise followed by recovery to sedentary levels. The response of other hepatic lipids, and acyl chain composition of lipid classes, would provide a deeper understanding of the response of hepatic lipid metabolism to acute exercise. METHODS: Female mice performed a single bout of continuous exercise (CE), high-intensity interval exercise (HIIE), or no exercise (CON). The total content of various lipids in the liver, and fatty acids within lipid classes, were measured in tissues collected 3 hours after exercise (Day 1) and the day following exercise (Day 2). RESULTS: The total concentration of TAG rose on Day 1 after exercise (P < 0.05), with a greater elevation in HIIE than CE (P < 0.05), followed by a decline toward CON levels on Day 2. The total concentration of other measured lipid classes was not significantly altered by exercise. However, n-6 polyunsaturated fatty acid relative abundance in diacylglycerol (DAG) was increased by HIIE (P < 0.05). In CON liver, TAG content was positively correlated with DAG and phosphatidylethanolamine (P < 0.05), while these statistical associations were disrupted in exercised mice on Day 1. CONCLUSIONS: Overall, the results characterize flexibility of the hepatic TAG pool size in the liver, and the relationship between TAG and other lipid abundances is altered during the transient TAG pool expansion after exercise. The transient expansion of the hepatic TAG pool and remodeling of the DAG pool may be fundamental components of the physiological response to intense exercise.

scholarly journals Development of a method for assessing the structural heterogeneity of a population of different strains of tick-borne encephalitis virus

2018 ◽  
pp. 108-111
Author(s):  
К.К. Тучинская ◽  
В.П. Волок ◽  
В.В. Илларионова ◽  
О.И. Ковалева
Keyword(s):  
Total Concentration ◽  
Surface Protein ◽  
Total Content ◽  
Culture Fluid ◽  
Structural Heterogeneity ◽  
Encephalitis Virus ◽  
Virus Particles ◽  
Tick Borne Encephalitis ◽  
Tick Borne Encephalitis Virus ◽  
Different Strains

Вирус клещевого энцефалита (ВКЭ) является возбудителем тяжелого неврологического заболевания человека и широко распространен на территории Евразии. При репродукции флавивирусов помимо инфекционных вирионов накапливается набор неинфекционных вирусных структур: незрелые формы вирионов, пустые формы (не содержащие геном вирусные частицы), а также агрегаты поверхностного белка Е, способные оказывать влияние на иммунный ответ, и патогенез. Штаммы ВКЭ могут различаться по соотношению этих форм в инфекционном материале, т.е. по характеру структурной гетерогенности. Цель: подобрать комплекс методов, способных выявить данные различия. Методы. Общую концентрацию белка Е определяли методом ИФА, число частиц, содержащих геном (ГСЧ) - ПЦР в реальном времени, а для выявления инфекционных вирусных частиц - титрование в культуре клеток. Результаты. Разработан метод оценки структурной гетерогенности популяции ВКЭ. Было показано, что повышенное содержание неинфекционных вирусных частиц, содержащих геном, и несвязанных с ними белка Е не зависит от подтипа вируса. Выводы. Штаммы ВКЭ отличились по соотношению общего числа ГСЧ к числу инфекционных вирионов и по содержанию белка Е, связанного и несвязанного с ГСЧ. Tick-borne encephalitis virus (TBEV) is widespread in Europe and Asia and causes severe neurological disease in humans. It has been established that the reproduction of flaviviruses leads to the accumulation of a whole set of non-infectious viral structures aside from infectious virions. These structures include immature virions, empty forms (containing no genome) and aggregates of the surface protein E. These structures, despite being non-infectious, are able to influence the immune response and, consequently, the pathogenesis of TBEV infection. The aim of this work was to select a set of methods which can be implemented to identify these differences. Methods. Virus samples were analised for protein E concentration, number of genome-containing particles and infectivity. The total concentration of protein E in samples was evaluated using ELISA. The number of genome-containing particles was determined by a real-time PCR, and to assess the number of infectious virus particles titration in PEK cell culture was used. Results. An assay for total concentration of protein E in culture fluid of cells infected with different strains of TBEV based on the commertially available ELISA kit was developed. TBEV strains used in the study varied by the ratio of genome-containing particles to infectious virions. The amount of protein E not associated with genome-containing virions was calculated as a difference between total content of protein E and the amount of protein E bound to genome-containing particles. This amount was also different for studied samples of TBEV strains. Conclusion. No correlation was observed between the increased content of non-infectious genome-containing particles or the amount of residual protein E and TBEV subtypes.

scholarly journals Using natural aluminosilicate (vermiculite) sorbent for purifying waste water from antibiotics

2022 ◽  
Vol 6 (4) ◽  
pp. 387-394
Author(s):  
D. S. Galchenko ◽  
M. G. Smirnova ◽  
L. I. Sokolova
Keyword(s):  
Waste Water ◽  
Total Concentration ◽  
Total Content ◽  
Fish Farming ◽  
Model System ◽  
Fish Processing ◽  
Dynamic Conditions ◽  
Natural Aluminosilicate ◽  
Antibiotics Detection ◽  
Static Conditions

The problem of wastewater treatment from residual antibiotics is of particular relevance, since these drugs are used in many agricultural sectors. Antibiotics get into water, animal and human bodies, where they can accumulate negatively affecting health. The aim of this article is to study the possibility of using natural aluminosilicate vermiculite sorbent from the Koksharovskoye field (Primorsky Region) for purifying fish processing and fish farming enterprises’ waste water from antibiotics (chloramphenicol, tetracycline, cefazolin, cefuroxime, ceftriaxone, cefepime and and ciprofloxacin) under static and dynamic conditions. The study was carried out on a model wastewater system with injected antibiotics. The purification ability of the model system using the method of spectrophotometric antibiotics detection is analyzed. Under static conditions, the total content of antibiotics varied from 0.25 mg to 1.00 mg per 1 g of sorbent. Under dynamic conditions, the antibiotic content was 0.025 mg per 1 g of sorbent. High values of absorption for all studied antibiotics, except for chloramphenicol, were achieved both in static and dynamic modes. For chloramphenicol, when examined under static conditions, the maximum absorption rate was 45% with the minimum total concentration of antibiotics. With an increase in the load on the sorbent, the degree of absorption decreased to 3%. Thus, vermiculite modified with 7% hydrochloric acid is a promising sorbent for cleaning water bodies from residual antibiotics.

scholarly journals Distribution and Fractionation of Heavy Metals in Sediments of Karra River, Hetauda, Nepal

2015 ◽  
Vol 19 (2) ◽  
pp. 123-128 ◽  
Author(s):  
Sadhana Pradhanang
Keyword(s):  
River Sediment ◽  
Total Concentration ◽  
Extraction Procedure ◽  
Residual Fraction ◽  
High Concentration ◽  
Metal Concentrations ◽  
Mn Oxide ◽  
Fractionation Analysis ◽  
Polluted Sites

A five-step sequential extraction procedure was applied for the determination of the distribution of four elements (Cr, Mn, Fe, and Ni) in sediment of the Karra River. Sediment samples were collected from 16 different sites in the Karra River (upstream, industrial belt, downstream). The distribution of trace metals among exchangeable, carbonate, reducible, oxidizable and residual fractions were determined. The total concentration of metals varies in the range of Cr 72–4339.54 mg kg?1, Mn 22–411.93 mg kg?1, Fe 2967.23-32423.0 mg kg?1 and Ni 31.70-180.74 mg kg?1. The accuracy evaluated by comparing total trace metal concentrations with the sum of the five individual fractions proved to be satisfactory. The chemical speciation of Cr, Mn, Fe, and Ni in most sampling stations were in the order of residual > reducible > oxidazable > carbonate> exchangeable. Fractionation analysis showed that dominant metals are in residual fraction. The highest metal concentrations were observed at the most polluted sites of the industrial belt. High concentration of chromium was found in the Fe-Mn oxide and organic fraction in some of the sites of industrial belt.Journal of Institute of Science and Technology, 2014, 19(2): 123-128

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