Uranium contamination of soils and sediments often originates from acidic or alkaline waste sources, with diffusion being a major transport mechanism. Measurements of U(VI) diffusion from initially pH 2 and pH 11 solutions into a slightly alkaline Altamont soil and a neutral Oak Ridge soil were obtained through monitoring uptake from boundary reservoirs and from U concentration profiles within ...

The distribution of metal contaminants such as chromium in soils can be strongly localized by transport limitations and redox gradients within soil aggregates. Measurements of Cr(VI) diffusion and reduction to Cr(III) were obtained in soil columns representing transects into soil aggregates in order to quantify influences of organic carbon (OC) and redox potentials on Cr transport distances and...

This study presents a new approach for physical and material modeling of space frame-raft-soil system. The physical modeling consists of a modified Thimoshenko beam bending element with six degrees of freedom per node to model the beams and columns of the superstructure, a modified Mindlin's plate bending element with five degrees of freedom per node to represent the structural slabs and raft, ...

Bioretention, also known as rain garden, allows stormwater to soak into the ground through a soil-based medium, leading to removal of particulate and dissolved pollutants and reduced peak flows. Although soil organic matter (SOM) is efficient at sorbing many pollutants, amending the bioretention medium with highly effective adsorbents has been proposed to optimize pollutant removal and extend b...

Sincere thanks go to the Development Fund of the Swedish Construction Industry (SBUF) and to the Swedish Transport Administration (Trafikverket), whose financial support made this work possible. I would also like to thank my supervisor, Stefan Larsson, who has supported this work with his knowledge and never-ending enthusiasm. Further acknowledgments are directed to my colleagues at the Divisio...

Sincere thanks are directed to the Development Fund of the Swedish Construction Industry (SBUF) and to the Swedish Transport Administration (Trafikverket), whose financial support made this work possible. I would also like to thank my supervisor, Stefan Larsson, who has supported this work with his knowledge and never-ending enthusiasm. Further acknowledgments are directed to my colleagues at t...

Groundwater contamination by fuel spills from aboveground and underground storage tanks has been of growing concern in recent years. This problem has been magnified by the addition of oxygenates, such as ethanol and methyl-tertiary-butyl ether (MTBE) to fuels to reduce vehicular emissions to the atmosphere. These additives, although beneficial in reducing atmospheric pollution, may, however, in...

By enhancing the applicatıon of grounds for establishment and due to the lack of appropriate sites, engineers attempt to seek out a new method to reduce the weakness of soils. İn aspect of economic situation, various ways have been used to decrease the weak grounds. Because of the rapid development of infrastructural facilities, spreading the construction operation is an obligation. Furthermore...

When embankment is constructed on very soft soil, special construction methods are adopted. One of the techniques a piled embankment. Piled (stone columns) embankments provide an economic and effective solution to problem constructing over soils. This method can reduce settlements, time cost. Stone columns improvement for soils under light structures such as rail or road embankments. The presen...