scholarly journals Thermal desorption treatment of petroleum hydrocarbon-contaminated soils of tundra, taiga, and forest steppe landscapes

Author(s):  
Marina V. Bykova ◽  
Alexey V. Alekseenko ◽  
Mariya A. Pashkevich ◽  
Carsten Drebenstedt

AbstractThe results of field, analytical, and experimental research at a number of production facilities reflect the properties of oil-contaminated soils in 3 landscapes: the permafrost treeless Arctic ecosystem, boreal forest, and temperate-climate grassland-woodland ecotone. Laboratory studies have revealed the concentrations of petroleum hydrocarbons in soils, ranging from medium levels of 2000–3000 mg/kg to critical figures over 5000 mg/kg, being 2–25 times higher than the permissible content of oil products in soils. The experimentally applied thermal effects for the oil products desorption from the soil allowed finding an optimal regime: the treatment temperature from 25 to 250 °C reduces the concentrations to an acceptable value. The conditions are environmentally sound, given that the complete combustion point of humates is ca. 450 °C. The outcomes suggest the eco-friendly solution for soil remediation, preserving the soil fertility in fragile cold environments and in more resilient temperate climates, where revitalized brownfields are essential for food production.

2020 ◽  
Author(s):  
Meshalkin Valeriy Pavlovich ◽  
Shulaev Nikolay Sergeevich ◽  
Pryanichnikova Valeria Valeryevna ◽  
Bykovsky Nikolay Alekseevich ◽  
Kadyrov Ramil Rimovich

This study developstheoretical bases for the electrochemical process of cleaning soils from oil, oil products and highly mineralized reservoir water. The article experimentally and theoretically reveals patterns of reducing the content of polluting oil products in soils of various types during the small voltage passing. The optimal amount of electricity for the effective removal of various types of pollution was required. For the implementation of a electrochemical soil cleaning process a scheme of an original installation with placement of electrodes in the soil was studied. It reduces the resistance between the electrodes. The technical and economical calculations to determine energy costs of the electrochemical installation for cleaning oil-contaminated soils included: the number of electrodes; the voltage depending on the properties of the soil; the area; the depth of contamination of the soil to be treated;azndthe parameters of the electrodes. This allowed us to determine and develop the required degree of cleaning. Keywords: electrochemical process, charge, soil, oil products, voltage, cleaning


2016 ◽  
Vol 6 ◽  
Author(s):  
Ali Akbar Safari Sinegani ◽  
Milad Jafari Monsef

Heavy metals in soluble form have the highest bioavailability and toxicity in soil. DTPA-extractable Cd was investigated in two different soil types treated with wheat straw (5%) under sterile and unsterile conditions. Soils were located in Hamadan (Iran, 48<sup>o</sup> 28<sup>'</sup> 23" E and 34<sup>o</sup> 56' 48" N), a fallow cropland with a semi-arid climate, and Lahijan (Iran, 50<sup>o</sup> 1<sup>'</sup> 51" E and 37<sup>o</sup> 11' 59" N), a tea plantation with a temperate climate. DTPA-extractable Cd in contaminated soils (10 mg Cd kg<sup>-1</sup>) was measured from 1 minute to 3600 hours. During the soil incubation period, DTPA-extractable Cd was higher in the Lahijan soil, but at the end of the soil incubation period it was higher in the Hamadan soil. The positive effect of wheat residue on DTPA-extractable Cd was higher in the Lahijan unsterile soil at the end of the soil incubation period. The decrease of DTPA extractability of the added Cd was lower in the Lahijan soil incubated under unsterile conditions compared to that under sterile conditions. In contrast, Hamadan sterile soil treated and untreated with wheat residue had the highest DTPA-extractable Cd at the end of the soil incubation period. The decrease in DTPA extractability of the added Cd in soils was exponential with 3 steps. In the 1<sup>st</sup> step the highest and the lowest rates of DTPA decrease were observed in Hamadan sterile and Lahijan unsterile soils treated with wheat residue. In the 3<sup>rd</sup> step it was reversed, and the decrease in DTPA extractable Cd was lower in the Hamadan soil compared to the Lahijan soil.


2020 ◽  
Vol 17 ◽  
pp. 00179
Author(s):  
Elena Yu. Rudenko ◽  
Galina S. Mukovnina ◽  
Artem G. Kashaev ◽  
Olga E. Temnikova ◽  
Roman S. Mukovnin

The study of the economic efficiency of investments in the production of a mixture of brewing waste provides an opportunity to assess the possibility of its practical use for the restoration of soils contaminated with oil and oil products. The UNIDO methodology is applied to calculate the costeffectiveness of investments in the brewing waste drying line for the remediation of contaminated soils. Fulfillment of the underlying conditions for the effectiveness of investments and the absence of a negative balance in the financial plan indicate the efficiency and feasibility of investments.


Author(s):  
Zhanna Matviishyna

Nowadays, cultural monuments deserve increasing attention. A comprehensive study of archeological complexes enables us to more accurately reproduce the conditions of formation and evolution of ancient society. In recent decades, archaeological sites have been investigated using archeology and paleogeography methods to reconstruct the character of landscape changes in the study area. Among such historical and archeological complexes is the famous city of Baturin, which holds a special place for deep and comprehensive study. Less than half a century later, having traveled from a small outpost on the northeastern border of the Commonwealth to the hetman's capital, Baturin died in the flames of the Northern War in the same short period of time. Tragedy of 1708 made Baturin not only a national shrine, but also a reference archaeological monument of the Cossack era, a cultural layer whose level of saturation and informativeness is unmatched. The inter-river basin of the Desna and the Seimas, which is geographically included in the Baturin Family, is one of the most important watersheds of the Dnieper North Left Bank, and the Seim River itself is a kind of natural border between the forest-steppe and forest zones. The territory where Baturin originated had a number of significant advantages. Baturin is located on the edge of the high terrace of the Diet. It is the only such elevated area of the left bank terrace of the Diet in its lower stream, which allowed to control virtually all of its basin. ancient times, which, combined with the wide floodplain of the Seimas with its opportunities for the development of livestock, fishing, hunting, created optimal conditions for economic activity of the population. During paleopedological research it was established that in the territory of the study in the catenary of soils with artifacts of the Bronze Age developed soils of meadow and forest-meadow genesis with well-formed humus horizons close to meadow-sod and alluvial-sod zones of temperate, but temperate climate. In the clearing of the shaft, the findings of the early Iron Age are confined to the surface of the humus horizon of the sod of slightly podzolic soils, formed in the conditions of meadow-steppe landscapes of temperate climate, less humid than the modern (background) soil. In the XVII-XVIII centuries. In the Polissya conditions, meadow-forest landscapes became widespread. In the soils on the high grass meadows there were conditions for the accumulation of organic matter, which made it possible to form well-defined humus horizons and the processes of sod genesis were quite pronounced. Turf-slightly podzolic ash-sandy sandy loamy and sandy soils of the XVII-XVIII centuries had well-defined humus horizons, and often were deeply humus, which provided for their agricultural use with ease of machining. The proximity of a fairly powerful river, as well as the spread of forests (as timber for business purposes), increased the possibility of comfortable living conditions in this area. In the XVIII-XX centuries. Opportunities for cultivation of soils with fertilizers have emerged and soils of clearing № 5,7,8 are characterized by high and deep (almost all over the profile) humus. They are an example of human influence on the cultivation of land and landscapes. In the floodplains, alluvial-marsh silt soils, enriched with the content of Fe and Mn hydroxides, often formed the basis for the development of iron-smelting production in the territories close to Baturin. In the low and high floodplains of the Diet, the formation of sediments was associated with alluvial processes (floods, alluvial sands) and aerial ones (sands, dunes). Among modern Baturin soils (background), typical sod-medium- and highly podzolic, as opposed to the predominance of slightly podzolic sod, aszed alluvial-meadow and alluvial-sod soils are identified. The terraces are characterized by the development of sod, sod-alluvial and sod-swamp soils (the latter on floodplains).


2009 ◽  
Vol 43 (4) ◽  
pp. 504-510 ◽  
Author(s):  
O. V. Abramov ◽  
V. O. Abramov ◽  
S. K. Myasnikov ◽  
M. S. Mullakaev

2021 ◽  
Vol 25 (9) ◽  
pp. 62-67
Author(s):  
S.A. Buzmakov ◽  
D.N. Andreev ◽  
A.V. Nazarov ◽  
E.A. Dzyuba ◽  
I.E. Shestakov ◽  
...  

Indicators of the permissible content of oil and products of its transformation for podzols of illuvial-ferruginous, sod-podzolic, peat boggy raised soils of the Perm territory are presented. The sampling of the selected soil types was carried out, with which experiments on phytotesting, biotesting of the quality of water extracts with differentiated oil pollution were carried out. The assessment of chronic phytotoxicity was carried out according to the reaction of three species of terrestrial plants: spring wheat, pea sowing, and hybrid spruce. The water extract of contaminated soils was tested on chlorella and daphnia. As a result, quantitative indicators of the permissible concentration of hydrocarbons in soils after reclamation for agricultural and forestry lands were obtained.


2021 ◽  
Vol 63 (1) ◽  
pp. 38-42
Author(s):  
Inna I. Torianyk

Aim: The aim of the study is to improve the complex diagnostic algorithm of babesiosis by etiopathogenetic assessment of tick skin lesions in vacationers of suburban resorts and tourists of Ukraine. Material and Methods: In order to objectify the etiopathogenetic assessment of tick skin lesions in vacationers of suburban resorts and tourists of Ukraine, animals affected by attacks of active stages of Ixodes, to determine their role as a component in a comprehensive diagnostic algorithm of babesiosis, we used a set of epidemic, epizootological, clinical and diagnostic measures. Skin lesions were considered acaroidal only in cases when ticks from the superfamily Ixodoidea of the family Ixodidea of the species Ixodes ricinus and Ixodes persulcatus (n=34), Dermacentor marginatus and Dermacentor pictus (n=128) were detected on it or on the clothes of the bitten person. Ticks of the species Ixodes ricinus, Ixodes persulcatus, Dermacentor marginatus and Dermacentor pictus were studied and photographed on an Olympus BX-41 microscope (Japan) using a digital camera. The surveyed 64 people of both sexes, aged 17 to 68, belonged to different categories of vacationers or tourists (organized, semi-organized, «savages»). The morphological material (skin with underlying soft tissues) was collected in cases of attacks of Ixodes on pets (dogs), accompanying the owners on vacation, when it was possible. Microspecimens stained with hematoxylin and eosin, picrofuxin according to van Gizon, according to Mallory were studied using an Olympus BX-41 microscope (Japan) with subsequent processing with the Olympus DP-soft version 3.1 software. Results: Climatotherapy is a popular treatment and prevention measure in the coordinate system «doctor-patient». This treatment method is characterized by both positive health effects and negative consequences, among which are the development of such dangerous parasitic disease as babesiosis. Etiopathogenetic assessment of tick skin lesions in vacationers of suburban resorts and tourists of Ukraine is an important component of a comprehensive diagnostic algorithm for babesiosis. Its objectification is based on the effective application of the data informative potential on the cycle and period of development of one generation of carriers (imago), the specifics of active stages (differentiation into three-host mites), habitat characteristics (shrubs, deciduous trees), seasonality (April-June, August-September), climatic zonation (temperate climate of the forest-steppe), their ability to inoculate babesiosis pathogens into the body of warm-blooded vertebrates. Macroscopic and microscopic features of the skin with underlying soft tissues at the sites of fixation and feeding of mites in susceptible to pathogens babesiosis humans and animals depend on the duration of this damaging factor exposure. Conclusions: Etiopathogenetic assessment of tick skin lesions in vacationers of suburban resorts and tourists of Ukraine is of great importance in the diagnosis of babesiosis.


2017 ◽  
pp. 199-205
Author(s):  
Анатолий (Аnatolij) Андреевич (Аndreevich) Глуханов (Glukhanov) ◽  
Сергей (Sergej) Иванович (Ivanovich) Третьяков (Tretyakov)

The main problem of industrial methods of production of tall oil is significant losses of the finished product with the waste of production – the lignin phase. It is a stable emulsion of the oil-in-water type, stabilized by lignin. Traditional ways to reduce the loss of tall oil by destroying the lignin phase are associated with a number of difficulties and in industrial practice are almost not currently used. In the present work, in order to increase the yield of tall oil when it is separated from the sulphate soap, a method for breaking the emulsion by heat treatment is proposed. The effect of the heat treatment temperature on the yield of tall oil from the lignin phase was studied. Optimum in relation to the yield of tall oil from the lignin phase is the temperature-time mode of heat treatment. It is shown that, under the optimal regime, the loss of tall oil with waste is reduced by 80%. Based on the results of the studies, a variant of the mechanism of changes occurring with components of the lignin phase during heat treatment is proposed. The composition of the components of the product after heat treatment at different temperatures has been studied. The values of the quality indicators of the obtained tall oil were established and their compliance with the requirements of the standard-setting documents in force in the territory of Russia was assessed. It was noted that all the parameters of the oil obtained during heat treatment correspond to the values established in the normative documents at the processing temperature from 100 to 140 °С. Based on the results of work, the heat treatment mode optimized for yield and quality of tall oil is proposed.


Author(s):  
E. I. Andaev ◽  
A. Ya. Nikitin ◽  
E. V. Yatsmenko ◽  
E. V. Verigina ◽  
M. I. Tolmacheva ◽  
...  

Tick-borne encephalitis is a natural-focal infection damaging central nervous system, caused by the similarly-named virus transmitted by several species of ixodic ticks. Natural foci of tick-borne encephalitis (TBE) are widely spread in the forest and forest-steppe landscape zones of the temperate climate belt in the vast territory of Eurasia from the Atlantic to the Pacific Ocean. New TBE-endemic territories have been recently identified in Japan, the Netherlands, and in the UK – in 2019. The increasing risk of infection due to the development of tourism and visits to natural foci of TBE became a public health issue of international concern. The aim of the study is to identify modern features of TBE incidence dynamics in the Russian Federation, the state of laboratory diagnostics and prevention and to predict the incidence for 2021. The paper shows that there is a persistent downward trend in TBE-cases in Russia, which is observed through the past few years. The characteristic feature of the epidemic season-2020 was a significant reduction in the incidence of TBE: 989 cases were registered in 33 constituent entities of the Russian Federation (morbidity rate – 0.67 per 100 000 of the population). The sharp decrease of TBE cases in 2020 as compared to 2019 against the background of a decrease in vaccination can be explained, along with natural factors, by the introduction of restrictive measures during the COVID-19 epidemic. The paper also reflects the dynamics of morbidity, seeking the medical services because of tick bites, the infection rate of the carrier, the scope of vaccination, seroprophylaxis, acaricide treatments. The coverage of express-diagnostic tests of ticks for markers of associated pathogens and its availability for the population are presented. It is recognized that the epidemiological situation on TBE in the Russian Federation remains unfavorable. It demands constant attention on the part of healthcare organizations and Federal Service for Surveillance in the Sphere of Consumers Rights Protection and Human Welfare, as well as management decision making aimed at further decrement in TBE incidence through the improvement of prevention measures, specifically in the entities that are characterized by high TBE incidence. The situation requires monitoring of natural foci of infection, enhancement of prophylaxis and treatment of TBE. The paper provides the forecast of TBE incidence for 2021 and values of the 95 % confidence range of the indicator fluctuation, taking into account the presence or absence of trends in its changes in the territory of federal districts and constituent entities of the Russian Federation in 2011–2020.


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