Trace element speciation in water and bottom sediments of the Pirogov water reservoir

2020 ◽  
pp. 59-68
Author(s):  
O. A. Lipatnikova ◽  
T. N. Lubkova ◽  
N. A. Korobova
Keyword(s):  
Trace Elements ◽  
Surface Water ◽  
Bottom Sediments ◽  
Manganese Oxides ◽  
Maximum Permissible Concentration ◽  
Solid Phase ◽  
Metal Speciation ◽  
Water Reservoir ◽  
Element Speciation ◽  
Iron And Manganese

The composition and speciation of trace elements (Cu, Pb, Zn, Cd, Ni, Co, Mn, Fe, Ba, and Sr) in surface water and bottom sediments of the Pirogov water reservoir have been studied. It was found that the metal content in surface water does not exceed the maximum permissible concentration (MPC) for fishery water reservoir excluded Zn (2–9 MPC) and Cu (up to 2 MPC). According to results of thermodynamic calculations, the predominant metal speciation in water is the free ion (Sr, Ba, Zn, Ni, Co, Cd), fulvate (Cu) and carbonate (Pb) complex. The interstitial water is characterized by an increase in the content of sulfate complex of trace elements in loams, the solid phase of which is also characterized by slightly anomalous contents of Zn, Cd, Co, and Ni. According to data of sequential selective procedure, metals are predominantly immobilized in solid phase of bottom sediments in the crystal structure of silicates or bounded to iron and manganese oxides. Only for Cd and Mn exchangeable and bound to carbonates fractions are characterized by considerable relative contents.

HEAVY METAL SPECIATION IN BOTTOM SEDIMENTS OF THE VYSHNEVOLOTSKY RESERVOIR

2018 ◽  
pp. 46-54
Author(s):  
O. A. Lipatnikova
Keyword(s):  
Heavy Metal ◽  
Organic Matter ◽  
Bottom Sediments ◽  
Metal Speciation ◽  
Organic Matter Content ◽  
Water Reservoir ◽  
Matter Content ◽  
Heavy Metal Speciation ◽  
Mobile Forms ◽  
Manganese Hydroxides

The study of heavy metal speciation in bottom sediments of the Vyshnevolotsky water reservoir is presented in this paper. Sequential selective procedure was used to determine the heavy metal speciation in bottom sediments and thermodynamic calculation — to determine ones in interstitial water. It has been shown that Mn are mainly presented in exchangeable and carbonate forms; for Fe, Zn, Pb и Co the forms are related to iron and manganese hydroxides is played an important role; and Cu and Ni are mainly associated with organic matter. In interstitial waters the main forms of heavy metal speciation are free ions for Zn, Ni, Co and Cd, carbonate complexes for Pb, fulvate complexes for Cu. Effects of particle size and organic matter content in sediments on distribution of mobile and potentially mobile forms of toxic elements have been revealed.

scholarly journals Analytical procedures for the determination of estrogen compounds in a surface water reservoir in Southeast Brazil

2021 ◽  
Vol 46 (1) ◽  
pp. 41-51
Author(s):  
Thayná Aparecida Cais ◽  
Alley Michael da Silva Procópio ◽  
Márcia Matiko Kondo ◽  
Flávio Soares Silva ◽  
Sandro José De Andrade
Keyword(s):  
Surface Water ◽  
Limit Of Detection ◽  
Solid Phase ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Water Reservoir ◽  
Array Detector ◽  
Sample Point ◽  
Fluorescence Detector ◽  
Analytical Methodology

In this study, an analytical methodology was validated to determine and quantify four estrogen hormones using high-performance liquid chromatography (HPLC) with detections by diode array detector (DAD) and by fluorescence detector (FLD). For validation of the method, the following parameters were evaluated: linearity, selectivity, precision, accuracy, limit of detection (LOD), limit of quantification (LOQ) and robustness. Environmental samples were preconcentrated using solid phase extractions and for that, an experimental design was planned to determine the best recovery conditions by varying cartridge types, flow of eluent, pH of the samples, and eluting solvent. Five surface water sampling campaigns were carried out in five different sites of Furnas Reservoir over the months of December 2015 and May 2016. Sample point 1 was located near the sewage treatment plant of the city of Alfenas - MG, while sample point 5 was the most distant from this location. All estrogens, except for E1, were found in all water samples of at least one of the sampling sites. The concentrations of E3, E2 and EE2 ranged from 11-366, 63-422 and 75-9998 ng L-1, respectively. These results are consistent with several studies published in the scientific literature.

scholarly journals Fractionation of Selected Heavy Metals in Agricultural Soils / Frakcjonowanie Wybranych Metali Ciężkich W Glebach Uprawnych

2013 ◽  
Vol 20 (1) ◽  
pp. 117-125 ◽  
Author(s):  
Szymon Różański
Keyword(s):  
Organic Matter ◽  
Significant Role ◽  
Manganese Oxides ◽  
Solid Phase ◽  
Extraction Procedure ◽  
Total Content ◽  
Residual Fraction ◽  
Geochemical Background ◽  
Fraction Bound ◽  
Iron And Manganese

Abstract The content of trace elements in soils varies widely and their mobility and availability depends not only on the total content but also on the form of in which these elements occur. The aim of this study was to determine the total content of nickel, lead, zinc and copper in soils used for agriculture, and assess the mobility and phytoavailability of these metals against a background of physical and chemical properties of these soils. In samples taken from three soil profiles (Phaeozem and 2 Fluvisols) the contents of Ni, Pb, Zn and Cu were determined using atomic absorption spectroscopy in the solutions obtained according to the protocol of modified BCR sequential extraction procedure supplemented with aqua regia digestion. The total content of the analyzed metals in most cases corresponded to the natural values, often not exceeding the geochemical background level. It was only in the one profile of the Fluvisols (Endogleyic Fluvisol) that a higher concentration of zinc and lead was noticed (especially in the surface horizon), slightly exceeding the legal limit. Among the studied metals the lowest phytoavailability was characterized by copper (exchangeable forms on average 4.73% of the total), and the highest by zinc (11.49%). Nickel was the most permanently bound with soil solid phase, and its content in the residual fraction reached 84.46% of the total. Approximately a half of the total lead content was determined as a fraction bound with iron and manganese oxides, while in the case of this metal a significant role in binding of this metal was playing organic matter (fraction bound with organic matter and sulphides - an average of 27.5%). Significant role in the binding of all investigated metals was credited to iron and manganese compounds.

Metals adsorbed to charcoal are not identifiable by sequential extraction

2007 ◽  
Vol 4 (1) ◽  
pp. 26 ◽  
Author(s):  
Yamin Ma ◽  
Andrew W. Rate
Keyword(s):  
Trace Elements ◽  
Metal Ions ◽  
Sequential Extraction ◽  
Trace Element ◽  
Manganese Oxides ◽  
Solid Phase ◽  
Ammonium Oxalate ◽  
Natural Soil ◽  
Trace Metal Ions ◽  
Iron Manganese

Environmental context. Charcoal is widespread in soils and may be a major component of soil organic matter. Trace metal ions in soils are predominantly associated with solid phase materials, including charcoal, and the identity of the solid phase and the mechanisms of association influence the geochemical behaviour of metals. Metals associated with soil mineral phases are estimated using techniques such as selective sequential extraction, and the sorption reactions of metal ions are well understood. Much less is known about the associations of trace metals with natural charcoal, and metals associated with charcoal in soils are likely to be misidentified in sequential extraction procedures. Abstract. Given that up to 50% of the soil carbon store can consist of charcoal, it is possible that trace elements can become immobilised through their interaction with natural charcoal. Hence, natural charcoal may be a significant sink that has yet to be accounted for in trace element biogeochemical cycles. Testing this hypothesis becomes problematic considering the typically small size (<53 µm) of charcoal particles that occur naturally in Australian soils, making isolation and analysis of natural soil charcoal difficult. Therefore, in this study, we test the robustness of a typical sequential extraction technique by applying it to naturally occurring charcoal that had been spiked with five different concentrations of metal ions (Al3+, Cr3+, Cu2+, Ni2+, Zn2+, Cd2+, Ag+, Pb2+). The method was then applied to contrasting soils mixed with this spiked charcoal. The sequential extraction scheme consisted of the following five extractions the in order: (1) sodium acetate (targeting the adsorbed-exchangeable-carbonate fraction), (2) sodium pyrophosphate (organic fraction), (3) ammonium oxalate (amorphous iron/manganese oxides), (4) hydroxylamine hydrochloride (crystalline iron/manganese oxides) and (5) residual (aqua regia digest). The majority of metals added to the charcoal were extracted in the fractions targeting both the amorphous and crystalline iron and manganese oxides, at low additions of metal ions. At higher additions of metals, the metals were mostly extracted from charcoal in the adsorbed-exchangeable-carbonate fraction. When the spiked charcoal was added to soils, a trend similar to the charcoal-only experiment was observed in the sequential extraction data. Higher concentrations of metals (compared with the control) were extracted for the charcoal-amended soils, in the same fractions as in the charcoal-only extractions. Since the concentration of metals extracted in the various extractants changed with increasing metal loads on charcoal, sequential extractions cannot be used to identify the contribution of metals from the charcoal pool. Therefore, a potentially large pool of trace elements could be misrepresented when sequential extraction techniques are applied, particularly for soils in which there is a large concentration of charcoal. Hence, there is still a large gap in knowledge with regard to the significance of charcoal in ‘real’ soils, particularly with respect to the role of charcoal as a trace element sink.

Main criteria for assessing the content of heavy metals in bottom sediments of water bodies

2020 ◽  
pp. 34-40
Author(s):  
Boris Korzhenevskiy ◽  
Gleb Tolkachev ◽  
Nikolay Kolomiycev
Keyword(s):  
Heavy Metals ◽  
Soil Contamination ◽  
Bottom Sediments ◽  
Maximum Permissible Concentration ◽  
Pore Solution ◽  
Solid Phase ◽  
Water Bodies ◽  
Main Criterion ◽  
Important Indicator ◽  
Secondary Pollution

The main criteria for assessing the content of heavy metals in sediments of water bodies. At present, the methodology for rationing pollutants in bottom sediments of surface watercourses is clearly not sufficiently developed. There are various and significantly different approaches to the assessment of soil contamination with heavy metals. The maximum permissible concentration (MAC), which is the main criterion for assessing the levels of pollution, is not perfect and needs to be significantly adjusted. A number of methodological assessments of contamination of bottom sediments with heavy metals with comparative characteristics are considered, of which a method for estimating the anthropogenic load on a reservoir according to its geo-classes has been proposed as one of the best. The gross content of heavy metals in bottom sediments of water bodies does not give a sufficient idea of the possibility of secondary pollution of water masses and, as a result, subsequent toxic effects. A much more important indicator is their content and distribution by forms of existence in the solid phase and pore solution of bottom sediments. As a consequence, this article develops a topic for estimating possible secondary pollution of water bodies by determining the content and distribution of TM by forms of existence in the solid phase and pore sediment solution.

Trace analysis: soils

1990 ◽  
Vol 333 (1628) ◽  
pp. 160-161
Keyword(s):  
Trace Elements ◽  
Manganese Oxides ◽  
Soil Extract ◽  
Water Soluble ◽  
Plant Availability ◽  
Soil Solutions ◽  
Freshwater Biota ◽  
Solute Chemistry ◽  
Trace Concentrations ◽  
Iron And Manganese

Determinations of constituents present in soils and soil solutions at trace concentrations are conducted primarily because of interest in soil as a medium for plant growth or because of its influence upon the solute chemistry of fresh waters and ground waters. Interest may arise from concern over potential toxicity effects or over adverse effects of deficiency of trace nutrient elements essential to soil or freshwater biota. In the above context, total amounts of elements present in soil are generally of less interest than water-soluble or labile, plant available forms (Marr & Cresser 1983). Rhizosphere soil may be more relevant than bulk soil in assessing plant availability. Over recent decades, optimal chemical extractants (such as EDTA or DTPA for Zn and Cu) have been selected which reflect plant availability of trace elements in terms of high correlations between plant tissue and soil extract concentrations. Occasionally full speciation is conducted. M. S. Cresser & E. El-Sayad (unpublished results), for example, have measured water-soluble, exchangeable and organically bound trace elements, and those in carbonate and amorphorus and crystalline iron and manganese oxides, and residual sand, silt and clay minerals. Such detailed analysis is valuable in elucidation of soil pedogenesis (El-Sayad et al . 1988).

scholarly journals Environmental and geochemical assessment of surface water streams in the impact area of the Urupsky mining plant tailings

2016 ◽  
pp. 39-46
Author(s):  
V. A. Gromova ◽  
T. V. Shestakova ◽  
O. A. Lipatnikova
Keyword(s):  
Trace Elements ◽  
Surface Water ◽  
Bottom Sediments ◽  
Mining Areas ◽  
Water Suspensions ◽  
State Of Water ◽  
Impact Area ◽  
The Impact ◽  
Mining Plant ◽  
Geochemical Assessment

Surface water is contaminated by trace elements in mining areas. A complex study was carried out on the state of water and bottom sediments of two rivers in the area of the tailings of Urupsky’s mining plant. The impact of tailings on the content of elements in the water, suspensions and bottom sediments was estimated. The main pollutants of the surface water and bottom sediments and also their element’s forms were revealed.

scholarly journals Trace Elements in Surface Water and Bottom Sediments in the Hyporheic Zone of Lake Wadąg, Poland

2020 ◽  
Vol 29 (3) ◽  
pp. 2327-2337
Author(s):  
Marcin Siepak ◽  
Marek Marciniak ◽  
Mariusz Sojka ◽  
Katarzyna Pietrewicz
Keyword(s):  
Trace Elements ◽  
Surface Water ◽  
Bottom Sediments ◽  
Hyporheic Zone

scholarly journals Heavy metals in surface water of the Atlantic sector of the Antarctic during the 79th cruise of the research vessel “Akademik Mstislav Keldysh”

2020 ◽  
Vol 5 (4) ◽  
pp. 56-68
Author(s):  
N. Yu. Mirzoeva ◽  
N. N. Tereshchenko ◽  
A. A. Paraskiv ◽  
V. Yu. Proskurnin ◽  
E. G. Morozov
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Surface Water ◽  
Maximum Permissible Concentration ◽  
Drake Passage ◽  
Weddell Sea ◽  
Tierra Del Fuego ◽  
Atlantic Sector ◽  
Bransfield Strait ◽  
The Antarctic

Relevance of monitoring heavy metals content in the water of the Atlantic sector of the Antarctic is due to the need for a current assessment of quality of the marine environment for making responsible decisions on the conservation of marine living resources in this unique area of the World Ocean. The aim of the study was to obtain new data on levels and spatial distribution of concentrations of trace elements, mainly heavy metals, in surface water. Sampling of surface seawater was carried out during the Antarctic expedition of the 79th cruise of the RV “Akademik Mstislav Keldysh” at 21 stations in the area of the Drake Passage, the Bransfield Strait, and the Antarctic Sound, as well as in Weddell and Scotia seas. Extracting and concentrating of dissolved form of 13 trace elements (Be, Se, Sb, Tl, V, Pb, Cd, Cu, Zn, Ni, Mo, Co, and Fe) were performed using sodium diethyldithiocarbamate and carbon tetrachloride (CCl4). The elements were measured by mass spectrometry. Among all trace elements content, only Mo concentration in seawater at 9 stations, located in the Drake Passage, the Bransfield Strait, northern Weddell Sea, and off the southern coast of Tierra del Fuego Island, exceeded 1.2–2.8 times maximum permissible concentration of trace elements in fishery water bodies of the Russian Federation (MPCF). According to international regulatory legal acts, such as “Dutch sheets”, there were single cases of exceeding MPC (maximum permissible concentration under short-term exposure) for Cd and Zn, as well as exceeding TV (target value under chronic exposure) for Cu, Pb, Cd, Zn, Se, and Co at several stations. The research has shown as follows: despite limited anthropogenic pressure on this area of the Southern Ocean, in seawater of some regions of the Atlantic sector of the Antarctic, increased concentrations of several trace elements, inter alia heavy metals, are recorded. Further study of the sources of trace elements intake and the peculiarities of their distribution in seawater of the Atlantic sector of the Antarctic is required in order to account for ongoing processes, take measures for rational management, and provide ecologically acceptable use of natural resources in the Antarctic.

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