scholarly journals Landscape-geochemical preconditions and regularities of toxic elements distribution on “Oleshkivski pisky” military training site territory

2020 ◽  
pp. 34-43
Author(s):  
A. Splodytel
Keyword(s):  
Heavy Metals ◽  
Soil Profile ◽  
Military Training ◽  
Water Soluble ◽  
Soluble Form ◽  
Contamination Level ◽  
Training Site ◽  
Mobile Forms ◽  
Migration Dynamics ◽  
The Military

It is characterized main features of landscape-geochemical structure of “Oleshkivski pisky” military range. It is analysed special aspects of military training activity influence on the of soils and plants contamination level with heavy metals. Sampling scheme for studying of heavy metals migration features, with respect to landscape structure of the territory is substantiated. Special features of heavy metals distribution in soils at different distances from firing positions within military range have been determined. It is investigated distribution and accumulation of I and II danger class heavy metals in soil and vegetational cover of the military training site. The regularities of spatial distribution of mobile and potentially accessible forms of heavy metals are determined. It was defined that content of heavy metals in three movable forms are represented in the following geochemical units, mg/kg: in acid soluble form – Mn > Zn > Pb > Cu > V > Ni > Co > Cd; in exchangeable form – Mn > Zn > Pb > V > Co = Ni > Cu > Cd; in water soluble form – Mn > Zn > Pb = V > Co > Ni > Cd > Cu. It is presented studies results on accumulation intensity and the nature of distribution of gross and mobile heavy metals forms in soil space and on their migration in the soil profile. The dominant technogenic geochemical unit was extracted: Cd > Hg > Pb > Cu > Zn > Ni > V > Co > Mn. Landscapes with maximum polyelement contamination have been identified. Landscape-geochemical map of “Oleshkivski pisky” military training site territory was drawn, relying on own field and experimental materials. Migration dynamics of Ni, Zn, Cu, V, Pb and other heavy metals mobile forms in the soil profile of soddy underdeveloped sandy soil during 2015–2019 under impact contamination levels has been determinated. The peculiarities of heavy metals mobile forms absorption in typical plant species of the military range territory during 2015–2019 vegetation periods were clarified.

scholarly journals HEAVY METALS DISTRIBUTION TRENDS ON "OLESHKIVSKI PISKY" MILITARY TRAINING SITE

2020 ◽  
pp. 42-48
Author(s):  
А. Splodytel
Keyword(s):  
Heavy Metals ◽  
Inductively Coupled Plasma ◽  
Gamma Ray ◽  
Soil Cover ◽  
Chemical Elements ◽  
Military Training ◽  
Fluorescence Analysis ◽  
Water Soluble ◽  
Soluble Form ◽  
Training Site

The results of ecological-geochemical researches of soil cover of "Oleshkivski pisky" military training site, using maximum allowable concentration and classification of chemical elements with respect to hazard classes are presented. Analytical works to identify gross content and heavy metals movable forms in soils were defined by methods of atomic absorption and mass-spectometry with inductively coupled plasma (ICPMS) as well as by using gamma-ray activation analysis and X-ray fluorescence analysis. Analysis and interpretation of the coefficients of heavy metal components concentration were conducted based on landscape and geochemical fundamentals. The regular network of the protoselection points was developed. This network is built taking into account landscape structure of the territory, and provides control over landscape and geochemical currents and barriers. The average index of soil cover pollution of the polygon was calculated taking into account different toxicity of the elements. This index reaches its maximum in the region of firing positions and military polygon. The average Zc index of the upper soil level is 32, which corresponds to the dangerous level of soil pollution. The research revealed the content of moveable forms of heavy metals in soil cover of the polygon in order to identify toxic and tolerant levels of heavy metals concentration and reserve sources of elements in soils, which can maintain optimal concentration level in soil solution. It was defined that content of heavy metals in three movable forms are represented in the following geochemical units, mg/kg: in acid soluble form – Mn > Zn > Pb > Cu > V > Ni > Co > Cd; in exchangeable form – Mn > Zn > Pb > V > Co = Ni > Cu > Cd; in water soluble form – Mn > Zn > Pb = V > Co > Ni > Cd > Cu. The article presents research results on accumulation intensity and the nature of distribution of gross and mobile heavy metals forms in soil and on their migration in the soil profile. The dominant technogenic geochemical unit was extracted: Cd > Hg > Pb > Cu > Zn > Ni > V > Co > Mn. Landscapes with maximum polyelement contamination have been identified.

scholarly journals Increasing soil fertility as an important factor in ensuring food security of the state

2021 ◽  
Vol 273 ◽  
pp. 05010
Author(s):  
Galina Pyrchenkova ◽  
Vladimir Sedikh ◽  
Elena Radchenko
Keyword(s):  
Heavy Metals ◽  
Humus Content ◽  
Water Soluble ◽  
Chicken Manure ◽  
Hydrothermal Conditions ◽  
Podzolic Soils ◽  
Manure Compost ◽  
Complexing Capacity ◽  
Mobile Forms ◽  
Poultry Droppings

The influence of chicken manure compost with sawdust in doses from 100 to 1000 t/ha on soil properties was studied on the sod-podzolic soils where the poultry farms of the Moscow region are located. An increase in pH, the humus content, the content of water-soluble forms of NPK in soils and an increase in the complexing capacity of soils were found. The authors define the correlation of the content of mobile forms of heavy metals in the sod-podzolic soils fertilized with poultry droppings with soil pH, the content of humus and mobile phosphates in them. The permissible doses of manure introduced into the soil as fertilizer are determined by the combination of properties, processes and soil regimes, relief, groundwater level, and hydrothermal conditions of the territory. The introduction of droppings into soils contaminated with heavy metals increased their mobility due to complex formation. A positive effect of the use of humates from chicken droppings on the bioproductivity of plants is defined. The article considers the necessity of controlling the quality of the water and air environment when regulating the composition and doses of application of chicken manure compost.

scholarly journals MIGRATION OF TOXIC METALS FROM VEGETABLE WASTE IN COMPOST

2019 ◽  
pp. 145-151
Author(s):  
T.V. SHEVCHUK ◽  
N.F. DOROSHKEVICH
Keyword(s):  
Heavy Metals ◽  
Environmental Safety ◽  
Waste Utilization ◽  
The Body ◽  
Water Soluble ◽  
Raw Material ◽  
Soluble Form ◽  
Vegetable Waste ◽  
Plant Materials ◽  
Fallen Leaves

The article presents the results of studies of the heavy metals transformation from the raw plant materials (dry leaf, lawn grass, vegetable wastes) in the process of composting using the Californian worm. It is known that in cities during the growing season, a large number of fallen leaves is accumulated. It is a valuable raw material for fuel production; it is an excellent thermal insulator, it is considered to be a good mulch and can be recycled. We have developed a humus technology based on vegetable waste (fallen leaves) with the help of a Californian worm. Before composting, the concentration of heavy metals (lead, cadmium, copper and zinc) was determined in foliage collected from the streets of Vinnitsa. Analyzes showed that the background of these metals in plant waste did not exceed the maximum permissible norms. It has been experimentally proved that composting involves the conversion of heavy metals from fallen leaves to the body of the Californian worm and removing them as insoluble components in the lower compass. In addition, it has been experimentally established that during the composting period various heavy metals showed uneven migration and transformation in a soluble form. The most active was adsorption and removal of zinc compost. It was found that humic water-soluble compounds convert more than 78% of the total zinc that was contained in the composted substrate. The least mobile compound was lead. However, even such a metal, as lead, during 150 days of composting by the California worm, turned into 40% soluble form and migrated to the lower layers of humic liquids. Thus, the processing of vegetable waste from cities (fallen leaves, lawn grass, garbage disposal, etc.) by composting using growing worms will not only solve the social problem of utilization, but will also contribute to increasing environmental safety and economic efficiency. Key words: heavy metals, transformation, California worms, compost, vegetable waste, utilization.

scholarly journals Assessment of anthropogenic contamination in an urban territory by the example of Blagoveshchensk city

2019 ◽  
pp. 79-93
Author(s):  
V. I. Radomskaya ◽  
N. A. Borodina
Keyword(s):  
Heavy Metals ◽  
Urban Soils ◽  
Soil Cover ◽  
Soil Layer ◽  
Organic Matter Content ◽  
Total Content ◽  
Water Soluble ◽  
Biogenic Elements ◽  
Average Risk ◽  
Mobile Forms

The distribution of heavy metals (HM) was analyzed in soils of Blagoveshchensk. The main physicochemical features (pH, the content of organic substance, mobile forms of phosphorus and potassium, the exchangeable cations of calcium and magnesium, as well as the total content of Cu, Cr, Ni, Co, Pb, Mn, Cd, Zn) were studied in soil samples. The anthropogenic influence on the urban environment transforms the physicochemical properties of soils: alkalizes the soil cover, increases the organic matter content, exchangeable bases, and mobile forms of biogenic elements. The total content of studied HM in the soils of Blagoveshchensk exceeds their concentrations in soils of the Mukhinka background territory and shows the spatial heterogeneity of pollutants distribution in the upper soil layer. As proceeds from the comparison of the studied elements concentrations with their MPC/APC, the most polluted territories are confined to industrial zones. Four elements, i.e., Mn, Pb, Cd and Zn, are accumulated in urban soils. However, Cu, Ni, Co, Cr accumulation is not so important. The calculation results of total contamination index in the upper soil cover layer in Blagoveshchensk taking into account the HM toxicity coefficient prove that Blagoveshchensk soils are mainly classified as moderately hazardous and nonhazardous. The evidence on the total content of HM do not allow making conclusion about their geochemical behavior in soils and about possible transition to neighbor environment. That is why the most mobile and easily mobilized forms of heavy metals, i.e., water-soluble and specifically adsorbed forms, were extracted using the method of successive extractions. The mobility of metals was established to be higher in the urban soils as compared to the background soils. Among the studied elements, Cd, Pb and Zn proved to be the most hazardous, with their mobility being close to the average risk of being included in the nutrition chains. This may lead to the contamination of Amur cross-boundary river ecosystems with heavy metals in case the groundwater level rises in the Blagoveshchensk territory due to its waterlogging by the Zeya River water.

PERSISTENCE OF BORAX IN SANDY SOILS

1958 ◽  
Vol 38 (2) ◽  
pp. 77-84 ◽  
Author(s):  
G. J. Ouellette
Keyword(s):  
Field Experiment ◽  
Soil Profile ◽  
Sandy Loam ◽  
Sandy Soils ◽  
Water Soluble ◽  
Soluble Form ◽  
Optimum Rate ◽  
Alfalfa Hay

A field experiment was conducted on St. Pacôme sandy loam to study the movement and accumulation of applied boron within the soil profile, and consequently determine the optimum rate and frequency of borax application to the sandy soils of Eastern Quebec for the production of alfalfa hay and seed. From 65 to 75 per cent of the borax applied, depending upon the rate used, had moved below the 36-inch depth 30 months after application. The remaining portion was found, mostly in water-soluble form, below the 16-inch depth in the case of plots which had received borax at the 10- and 15-lb. rates, and in the entire profile, but with greater concentration in lower depths, in the case of plots which had received 25 and 40 lb. per acre. Very little fixation of the boron applied occurred between the surface and the 36-inch depth. The biennial application of 15 to 20 lb. of borax for alfalfa hay and 25 to 30 lb. for seed appeared satisfactory on that soil.

scholarly journals Regularities of La distribution in humic psammozem profile of Transbaikalia and soil-root layer microzones of maize during the vegetation period

2014 ◽  
Vol 3 (2) ◽  
pp. 167-174
Author(s):  
Larisa Afanasyeva ◽  
Nina Kozhevnikova
Keyword(s):  
Rare Earth ◽  
Soil Profile ◽  
Maximum Concentration ◽  
Total Content ◽  
Vegetation Period ◽  
Selective Extraction ◽  
Water Soluble ◽  
Mobile Form ◽  
Field Approach ◽  
Mobile Forms

In Transbaikalia information about accumulation, distribution of rare earth elements (REEs) in soils, their transportation from soil to plants is very rare. The aim of this study was to assess the migration of lanthanum in a soil profile and soil-root layer microzones of maize during the vegetation period. The study is based on a field approach in non-polluted natural sites. Concentration of total content La and its mobile form (acid-soluble, exchangeable and water-soluble) in the soil and soil root layer of maize was determined using method of selective extraction Gobran and Glegg. Maximum concentration total La was founded in the upper part of the soil (0 to 15 cm depth). The content of the La mobile forms is 6.9-11.2% from the total amount. The distribution of the element mobile forms within the profile is relatively even. Results indicated that concentration La mobile forms changed in accordance with the phase of maize development. The higher concentration of mobile forms (17-120% from germination period) was founded in soil-root layer microzones in the blossom period. DOI: http://dx.doi.org/10.3126/ije.v3i2.10527 International Journal of the Environment Vol.3(2) 2014: 213-220

scholarly journals Source and Health Risk Assessment of Heavy Metals in Soil–Ginger System in the Jing River Basin of Shandong Province, North China

2021 ◽  
Vol 18 (13) ◽  
pp. 6749
Author(s):  
Songtao Wang ◽  
Zongjun Gao ◽  
Yuqi Zhang ◽  
Hairui Zhang ◽  
Zhen Wu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
River Basin ◽  
Soil Profile ◽  
Pollution Index ◽  
Potential Ecological Risk ◽  
Average Concentration ◽  
Anthropogenic Factors ◽  
Multivariate Statistical ◽  
Cr Content

This study investigated the characteristics and sources of heavy metals in a soil–ginger system and assessed their health risks. To this end, 321 topsoil samples and eight soil samples from a soil profile, and 18 ginger samples with root–soil were collected from a ginger-planting area in the Jing River Basin. The average concentration of heavy metals in the topsoil followed the order: Cr > Zn > Pb > Ni > Cu > As > Cd > Hg. In the soil profile, at depths greater than 80 cm, the contents of Cr, Ni, and Zn tended to increase with depth, which may be related to the parent materials, whereas As and Cu contents showed little change. In contrast, Pb content decreased sharply from top to bottom, which may be attributable to external environmental and anthropogenic factors. Multivariate statistical analysis showed that Cr, Ni, Cu, Zn, and Cd contents in soil are affected by natural sources, Pb and As contents are significantly affected by human activities, and Hg content is affected by farmland irrigation. Combined results of the single pollution index (Pi), geo-accumulation index (Igeo), and potential ecological risk assessment (Ei and RI) suggest that soil in the study area is generally not polluted by heavy metals. In ginger, Zn content was the highest (2.36 mg/kg) and Hg content was the lowest (0.0015 mg/kg). Based on the bioconcentration factor, Cd and Zn have high potential for enrichment in ginger. With reference to the limit of heavy metals in tubers, Cr content in ginger exceeds the standard in the study area. Although Cr does not accumulate in ginger, Cr enrichment in soil significantly increases the risk of excessive Cr content in ginger.

scholarly journals Analyzing the Carotenoid Composition of Melilot (Melilotus officinalis (L.) Pall.) Extracts and the Effects of Isolated (All-E)-lutein-5,6-epoxide on Primary Sensory Neurons and Macrophages

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 503
Author(s):  
Györgyi Horváth ◽  
Eszter Csikós ◽  
Eichertné Violetta Andres ◽  
Tímea Bencsik ◽  
Anikó Takátsy ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Sensory Neurons ◽  
Biological Activities ◽  
Water Soluble ◽  
Soluble Form ◽  
Primary Sensory Neurons ◽  
Isolation And Identification ◽  
Melilotus Officinalis ◽  
Carotenoid Composition ◽  
Anti Inflammatory

Melilotus officinalis is known to contain several types of secondary metabolites. In contrast, the carotenoid composition of this medicinal plant has not been investigated, although it may also contribute to the biological activities of the drug, such as anti-inflammatory effects. Therefore, this study focuses on the isolation and identification of carotenoids from Meliloti herba and on the effect of isolated (all-E)-lutein 5,6-epoxide on primary sensory neurons and macrophages involved in nociception, as well as neurogenic and non-neurogenic inflammatory processes. The composition of the plant extracts was analyzed by high performance liquid chromatography (HPLC). The main carotenoid was isolated by column liquid chromatography (CLC) and identified by MS and NMR. The effect of water-soluble lutein 5,6-epoxide-RAMEB (randomly methylated-β-cyclodextrin) was investigated on Ca2+-influx in rat primary sensory neurons induced by the activation of the transient receptor potential ankyrin 1 receptor agonist to mustard-oil and on endotoxin-induced IL-1β release from isolated mouse peritoneal macrophages. (all-E)-Lutein 5,6-epoxide significantly decreased the percent of responsive primary sensory neurons compared to the vehicle-treated stimulated control. Furthermore, endotoxin-evoked IL-1β release from macrophages was significantly decreased by 100 µM lutein 5,6-epoxide compared to the vehicle-treated control. The water-soluble form of lutein 5,6-epoxide-RAMEB decreases the activation of primary sensory neurons and macrophages, which opens perspectives for its analgesic and anti-inflammatory applications.

scholarly journals Human Lanosterol 14-Alpha Demethylase (CYP51A1) Is a Putative Target for Natural Flavonoid Luteolin 7,3′-Disulfate

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2237
Author(s):  
Leonid Kaluzhskiy ◽  
Pavel Ershov ◽  
Evgeniy Yablokov ◽  
Tatsiana Shkel ◽  
Irina Grabovec ◽  
...  
Keyword(s):  
Cholesterol Metabolism ◽  
Cholesterol Biosynthesis ◽  
Clinical Importance ◽  
Optical Biosensor ◽  
Water Soluble ◽  
Soluble Form ◽  
Redox Partner ◽  
Access Channel ◽  
Kd Values ◽  
Key Steps

Widespread pathologies such as atherosclerosis, metabolic syndrome and cancer are associated with dysregulation of sterol biosynthesis and metabolism. Cholesterol modulates the signaling pathways of neoplastic transformation and tumor progression. Lanosterol 14-alpha demethylase (cytochrome P450(51), CYP51A1) catalyzes one of the key steps in cholesterol biosynthesis. The fairly low somatic mutation frequency of CYP51A1, its druggability, as well as the possibility of interfering with cholesterol metabolism in cancer cells collectively suggest the clinical importance of CYP51A1. Here, we show that the natural flavonoid, luteolin 7,3′-disulfate, inhibits CYP51A1 activity. We also screened baicalein and luteolin, known to have antitumor activities and low toxicity, for their ability to interact with CYP51A1. The Kd values were estimated using both a surface plasmon resonance optical biosensor and spectral titration assays. Unexpectedly, in the enzymatic activity assays, only the water-soluble form of luteolin—luteolin 7,3′-disulfate—showed the ability to potently inhibit CYP51A1. Based on molecular docking, luteolin 7,3′-disulfate binding suggests blocking of the substrate access channel. However, an alternative site on the proximal surface where the redox partner binds cannot be excluded. Overall, flavonoids have the potential to inhibit the activity of human CYP51A1 and should be further explored for their cholesterol-lowering and anti-cancer activity.

The Military-Training Decision

1935 ◽  
Vol 6 (5) ◽  
pp. 249
Author(s):  
M. M. Chambers
Keyword(s):  
Military Training ◽  
The Military
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