Search results for: ZSoil
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Studies on removal of hydrophobic organics from contaminated soil by washing process
PublicationZbadano efektywność wymywania NAPL ze złoża piaskowego za pomocą roztworów dwóch niejonowych surfaktantów: polioksyetylenowanego alkoholu tłuszczowego (Rokanol NL6) oraz alkiloglukozydu (Triton BG10). Jako NAPL zastosowano dwa węglowodory - dodekan i heksadekan. Oba surfaktanty były relatywnie efektywne w usuwaniu dodekanu. Ze wzrostem stężenia surfaktantu obserwowano wzrost efektywności wymywania dodekanu, jednakże Rokanol NL6...
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Influence of instalation of piles with partial and full displacement of the soil on the subsoil strength
PublicationZjawiska zachodzące w bezpośrednim sąsiedztwie pobocznicy pali przemieszczeniowych mają ważne znaczenie dla ich pracy w podłożu. Zmiany stanu naprężenia pionowego, poziomego, zmiana struktury gruntu, wilgotności i zagęszczenia stwarza nowe warunki oddziaływania w strefie pobocznica - podłoże. Przedstawiono wyniki badań sondą CPT w sąsiedztwie pali CFA dla gruntów uwarstwionych, niespoiste / spoiste. Zwrócono uwagę na dobór parametrów...
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Modified and pristine biochars for remediation of chromium contamination in soil and aquatic systems
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Effect of pesticides on microorganisms, enzymatic activity and plant in biochar-amended soil
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The impact of gasification wastewater on soil microorganisms and the growth of oat and red clover
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Development of an Autochthonous Microbial Consortium for Enhanced Bioremediation of PAH-Contaminated Soil
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Remediation techniques for elimination of heavy metal pollutants from soil: A review
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Scenarios of mercury emission to air, water and soil in Poland to year 2020
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Current methods and technologies for degradation of atrazine in contaminated soil and water: A review
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Analysis of floor-to-column pounding of buildings founded on different soil types
PublicationThe aim of this study is to investigate the effect of the soil type on buildings experiencing floor-to-column pounding during earthquakes. Five buildings with 4-storeys, 6-storeys, and 7-storeys were considered. Three types of the 4-storey building with different total heights were taken into account which leads to floor-to-column pounding at 1/3, 1/2 and 2/3 of the height of the impacted column. Two pounding scenarios were considered,...
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Analysis of pounding between adjacent buildings founded on different soil types
PublicationEarthquake-induced pounding was experienced in many previous earthquakes and it was found to be a critical issue. This study investigates the effect of pounding between buildings founded on the same and different soil types. Three 3-D buildings with 4, 6 and 8 storeys were considered in this study. Three pounding scenarios were taken into account, i.e. pounding between 4-storey and 6-storey buildings, between 4-storey and 8-storey...
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Pounding between high-rise buildings founded on different soil types
PublicationEarthquake-induced pounding is a phenomenon that has been often experienced in previous earthquakes. The aim of this study is to investigate the effect of the soil type on high-rise buildings experiencing earthquake induced-pounding. Pounding between 7-storey and 9-storey buildings is examined under five soil types defined in the ASCE 7-10 code which are hard rock, rock, very dense soil and soft rock, stiff soil and soft clay soil....
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Influence of soil anisotropic stiffness on the deformation induced by an open pit excavation.
PublicationIn this paper, the problem of deformation induced by an open pit excavation in anisotropic stiff soils is analysed by FE modelling. The presented research is focused on the influence of material model with anisotropic stiffness on the accuracy of deformation predictions as compared with the field measurements. A new hyperelastic-plastic model is applied to simulate anisotropic mechanical behaviour of stiff soils. It is capable...
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CLEAN-SOIL AIR WATER
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COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
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International Soil and Water Conservation Research
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Journal of Soil Science and Plant Nutrition
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Journal of Chinese Soil and Water Conservation
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South African Journal of Plant and Soil
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Journal of the Indian Society of Soil Science
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JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE
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SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
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Blast Charge Technique as a Method of Soil Improving to Locate the New Supporting Runways
PublicationA quick and effective method of reinforcing the ground base designed for the construction of engineering structures used for performing various types of air operations was presented. It allows to use wastelands, wetlands, swamps, etc. for these purposes, thus creating a dispersed network of landing sites, increasing the access of large social groups to air transport and increasing their mobility.
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Effect of soil moisture on current-carrying capacity of low-voltage power cables
PublicationOne of the factors affecting current-carrying capacity of underground power cables is the thermal resistivity of soil. Its value in the close proximity of the cable is the most important, and for this reason, in some cases, the local soil is replaced with an another soil type or with a cement-sand mixture. The thermal resistivity of the soil is strongly affected by moisture, and in the case of a cement-sand mixture – as tested...
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Optical flow method for measuring deformation of soil specimen subjected to torsional shearing
PublicationIn this study optical flow method was used for soil small deformation measurement in laboratory tests. The main objective was to observe how the deformation distributes along the whole height of cylindrical soil specimen subjected to torsional shearing (TS test). The experiments were conducted on dry non-cohesive soil specimens under two values of isotropic pressure. Specimens were loaded with low-amplitude cyclic torque to analyze...
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The use of Kamienna głowa cabbage species for phytoextraction of zinc and cadmium from the soil
PublicationAlthough traditional technologies for cleaning contaminated soils have proven to be efficient, they are usually expensive, labor intensive, and in the case of soil, they produce severe disturbance. Most recently, the use of plants in metal extraction (phytoremediation) has appeared as a promising alternative in the removal of heavy metal excess from soil. Phytoremediation uses of plant for pollutant stabilization, extraction, degradation,...
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Critical study of crop-derived biochars for soil amendment and pharmaceutical ecotoxicity reduction
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Effect of biochar activation by different methods on toxicity of soil contaminated by industrial activity
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A comparison of indexing methods to evaluate quality of soils: the role of soil microbiological properties
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Comparative model tests of SDP and CFA pile groups in non-cohesive soil
PublicationThe research topic relates to the subject of deep foundations supported on continuous flight auger (CFA) piles and screw displacement piles (SDP). The authors have decided to conduct model tests of foundations supported on the group of piles mentioned above and also the tests of the same piles working alone. The tests are ongoing in Geotechnical Laboratory of Gdańsk University of Technology. The description of test procedure, interpretation...
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Oil removal from polluted soil by washing with surfactants solutions in dynamic conditions
PublicationFor washing of the oil from polluted soil surfactants solutions were applied. In a research a nonionic synthetic surfactant - polyoxyethylene ether of synthetic fatty alcohol (Rokanol NL6), rhamnolipid biosurfactant JBR 425 (Jeneil Biosurfactant Co. LLC) and their mixtures were used. Results of oil removal from peat soil and sand with mixtures of surfactants solutions at concentration 0,5 g/dm...
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The solubilization of hydrocarbon mixtures as one of the mechanisms of hydrophobic pollutants removal from soil
PublicationBadano solubilizację mieszanin węglowodorów alifatycznych (dekanu, dodekanu, tetradekanu, heksadekanu) i aromatycznych (toluenu, o-xylenu) w roztworach micelarnych surfaktantów niejonowych - oksyetylenowanego alkoholu (Rokanol NL6) i alkilopoliglukozydów (Triton BG10, AG 6210). Najwyższą efektywność solubilizacji uzyskano dla Rokanolu NL6. Efektywność solubilizacji mieszaniny zależała od rozpuszczalności poszczególnych jej składników...
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Identification and molecular modeling of a novel lipase from an Antarctic soil metagenomic library.
PublicationIn this work, we present the construction of a metagenomic library in Escherichia coli using pUC19 vector and environmental DNA directly isolated from Antarctic topsoil and screened for lipolytic enzymes. The screening on agar supplemented with olive oil and rhodamine B revealed one clone with lipolytic activity (Lip1) out of 11,000 E. coli clones. This clone harbored a plasmid, pLip1, which has an insert of 4722 bp that has been...
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DEM-FEM model of highly saturated soil motion due to seepage force
PublicationArtykuł poświęcono nowej propozycji rozwiązania problemu modelowania zjawiska transportu, które występuje wewnątrz wysoko-nawodnionego gruntu ziarnistego na skutek ciśnienia spływowego. Teoria oparta została na połączeniu metody elementów skończonych (FEM - Finite Element Method) - rozwiązania równań poro-elastycznych oraz metody poszczególnych elementów (DEM - Distinct Element Method), które dały podwójny model numeryczny. FEM...
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Removal of hydrophobic organic pollutants from soil by surfactants and biosurfactants solution flushing
PublicationPrzedstawiono wyniki solubilizacji dwóch związków hydrofobowych - tetrachloroetylenu i dodekanu oraz dwóch bazowych olejów mineralnych - SAE 30/95 i PAO6 w wodnych roztworach syntetycznych związków powierzchniowo czynnych oraz biosurfaktantów. Zaobserwowano liniowy wzrost solubilizacji wraz ze wzrostem stężenia surfaktantu.Przedstawiono także wyniki wymywania oleju PAO6 ze sztucznie zaolejonego piasku (w kolumnie) z pomocą roztworów...
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Wetting properties of biosurfactant (rhamnolipid) with synthetic surfactants mixtures in the context of soil remediation
PublicationWetting properties of synthetic surfactant Rokanol NL6, biosurfactant JBR 425 and their mixture have been investigated.The results show that synthetic surfactant addition worsens physicochemical properties of pure biosurfactant but exhibits much higher oil removal efficiency than biosurfactant does.
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Effects of Contamination with Gasoline and Diesel Oil on Shear Strength of Coarse Grained Soil
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The application of acetylacetone for the separation of heavy metals in roadside soil belts by extraction methods
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Residual Effects of Different Cropping Systems on Physicochemical Properties and the Activity of Phosphatases of Soil
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EFFECTS OF 13 YEARS SOIL FERTILISATION ON STORAGE QUALITY OF âCORTLANDâ APPLES
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Determination of p-y curves for offshore piles based on in-situ soil investigations
PublicationOffshore piles are subjected to complex loads with considerable lateral component. The pile-soil response to lateral loads can be described with the p-y method. For a given depth the load–deflection relationship is built to simulate the surrounding soil stiffness. This state-of-art paper presents a brief discussion of determination methods for the p-y curves using a standard approach based on the soil parameters derived from laboratory...
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Comparison of soil models in the thermodynamic analysis of a submarine pipeline buried in seabed sediments
PublicationThis paper deals with mathematical modelling of a seabed layer in the thermodynamic analysis of a submarine pipeline buried in seabed sediments. The existing seabed soil models: a “soil ring” and a semi-infinite soil layer are discussed in a comparative analysis of the shape factor of a surrounding soil layer. The meaning of differences in the heat transfer coefficient of a soil layer is illustrated based on a computational example...
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Testing of the longest span soil-steel bridge in Europe – new quality in measurements
PublicationThe article describes interdisciplinary and comprehensive diagnostic tests of final bridge inspection and acceptance proposed for a soil – steel bridge made of corrugated sheets, being the European span length record holder (25.74 m). As an effect of an original concept a detailed and precise information about the structure response was collected. The load test design was based on the nonlinear numerical simulations performed by...
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Probabilistic estimation of diverse soil condition impact on vertical axis tank deformation
PublicationThe calculations of fuel tanks should take into account the geometric imperfections of the structure as well as the variability of the material parameters of the foundation. The deformation of the tank shell can have a significant impact on the limit state of the structure and its operating conditions. The paper presents a probabilistic analysis of a vertical-axis, floating-roof cylindrical shell of a tank with a capacity of 50000...
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Study of Soil Temperature and Moisture Changes in a Physical Model of an Underground Cable Line
PublicationThe ampacity of power cables is highly dependent on the thermal resistivity of the soil in which they are laid. The lower it is, the higher this ampacity. The thermal resistivity of the soil decreases as its moisture increases. Therefore, it is preferable that the soil around the cables has high moisture. Unfortunately, the heat generated in heavily loaded cables causes the migration of moisture from the surrounding soil, which...
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Adsorption properties of Triton X-100 and rhamnolipid biosurfactant in the contex of soil remediation
PublicationZbadano adsorpcję surfaktantu syntetycznego Triton X-100 i biosurfaktantu z grupy ramnolipidów oraz ich koadsorpcję na granicy faz powietrze/woda oraz olej/woda. Jako fazę organiczną wybrano dodekan oraz syntetyczny olej bazowy na bazie polialfaolefin (PAO). Te same surfaktanty użyto do zbadania zwilżalności powierzchni stałych pokrytych cieńką warstwą substancji hydrofobowej. Na podstawie badań fizykochemicznych nie zauważono...
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APPLIED SOIL ECOLOGY
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SOIL & TILLAGE RESEARCH
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FEM modelling of screw displacement pile interaction with subsoil
PublicationPredicting the-settlement characteristics of piles is an important element in the designing of pile foundations. The most reliable method in evaluating pile-soil interaction is the static load test, preferably performed with instrumentation for measuring shaft and pile base resistances. This, however, is a mostly post-implementation test. In the design phase, prediction methods are needed, in which numerical simulations play an...
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The Effect of the Selection of Three-Dimensional Random Numerical Soil Models on Strip Foundation Settlements
PublicationThis paper delivers a probabilistic attempt to prove that the selection of a random three-dimensional finite element (FE) model of a subsoil affects the computed settlements. Parametricanalysis of a random soil block is conducted, assuming a variable subsoil Young’s modulus inparticular finite elements. The modulus is represented by a random field or different-sized setsof random variables; in both cases, the same truncated...