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  • 1.
    Birkholzer, Jens T.
    et al.
    Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
    Bond, Alexander E.
    Quintessa Ltd, Warrington, Cheshire, England.
    Hudson, John A.
    Imperial Coll Emeritus, London, England.
    Jing, Lanru
    KTH Royal Inst Technol Emeritus, Stockholm, Sweden.
    Tsang, Chin-Fu
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
    Shao, Hua
    BGR Fed Inst Geosci & Nat Resources, Hannover, Germany.
    Kolditz, Olaf
    UFZ Helmholtz Ctr Environm Res, Leipzig, Germany;TUDD Tech Univ Dresden, Dresden, Germany.
    DECOVALEX-2015: an international collaboration for advancing the understanding and modeling of coupled thermo-hydro-mechanical-chemical (THMC) processes in geological systems2018Inngår i: Environmental Earth Sciences, ISSN 1866-6280, E-ISSN 1866-6299, Vol. 77, nr 14, artikkel-id 539Artikkel i tidsskrift (Annet vitenskapelig)
  • 2.
    Dimberg, Peter H.
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära.
    Bryhn, Andreas C.
    Predicted effects from abatement action against eutrophication in two small bays of the Baltic Sea2014Inngår i: Environmental Earth Sciences, ISSN 1866-6280, E-ISSN 1866-6299, Vol. 72, nr 4, s. 1191-1199Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The Baltic Sea has abnormal algal blooms during spring and summer which are effects of high concentrations of total phosphorus (TP) and other nutrients in the surface water. Björnöfjärden (BF), a coastal area connected to the Baltic Sea, is selected for investigating whether aluminium treatment of sediments may reduce TP concentrations in the water mass. The aim of this paper is to evaluate effects from different abatement actions in two bays, BF and Nyköpingsfjärden (NF). The four investigated scenarios are (1) no action, (2) reducing TP from local sources, (3) fixing TP in sediments with aluminium, and (4) decreasing TP concentrations in the outside sea. Magnitudes of different TP fluxes during the different scenarios were estimated using a dynamic mass balance model, CoastMab, which has previously been tested against data from Swedish coastal waters. Alternative actions such as aluminium treatment and reduction of TP from local sources would result in no or scant effect on the TP concentrations in the two bays according to model simulations. The only action which would result in a significant expected decrease in TP concentrations would be to decrease TP concentrations in the outside sea. It is concluded that BF and NF are not suitable for studying effects from local abatement action because of large TP fluxes from the outside sea.

  • 3.
    Sharma, Prabhakar
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära.
    Bao, Dixiao
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Uppsala University.
    Fagerlund, Fritjof
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära.
    Deposition and mobilization of functionalized multiwall carbon nanotubes in saturated porous media: effect of grain size, flow velocity and solution chemistry2014Inngår i: Environmental Earth Sciences, ISSN 1866-6280, E-ISSN 1866-6299, Vol. 72, nr 8, s. 3025-3035Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Carbon nanotubes (CNTs) are widely manufactured nanoparticles which are utilized in a number of consumer products, such as sporting goods, electronics and biomedical applications. Due to their accelerating production and use, CNTs constitute a potential environmental risk if they are released to soil and groundwater systems. It is therefore essential to improve the current understanding of environmental fate and transport of CNTs. The current study systematically investigated the effect of solution chemistry (pH and ionic strength) and physical conditions (collector grain size and flow rate) on the deposition and mobilization of functionalized multiwall carbon nanotubes (MWCNTs) using a series of column experiments under fully saturated conditions. A 1-dimensional convection-dispersion model including collector efficiency for cylindrical nanoparticles was used to simulate the transport of MWCNTs in porous media. It was observed that an increase in pH resulted in increased mobility of MWCNTs. However, the transport of MWCNTs was strongly dependent on ionic strength of the background solution and a critical deposition concentration (CDC) was observed between 3 and 4 mM NaCl concentration, with more than 99% filtration of MWCNTs at 4 mM. The finer sand grains were able to filter a significant amount of MWCNTs (15% more than coarse sand) from the inflow solution; this was likely caused by grain-to-grain straining mechanisms in the finer sand. A decrease in pore-water velocity also led to more deposition of MWCNTs due to lowering of the kinetic energy of the particles. The results from this study indicated that a weak secondary minimum existed under unfavorable conditions for deposition, but the particles were trapped at both primary and secondary minimum.

  • 4.
    Sopher, Daniel
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Geofysik.
    Juhlin, Christopher
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Geofysik.
    Levendal, Tegan
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Erlstrom, Mikael
    Geol Survey Sweden SGU, Kiliansgatan 10, S-22350 Lund, Sweden;Lund Univ, Dept Geol, Solvegatan 12, S-22362 Lund, Sweden.
    Nilsson, Karl
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Da Silva Soares, José Pedro
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Evaluation of the subsurface compressed air energy storage (CAES) potential on Gotland, Sweden2019Inngår i: Environmental Earth Sciences, ISSN 1866-6280, E-ISSN 1866-6299, Vol. 78, nr 6, artikkel-id 197Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Wind energy is an important field of development for the island of Gotland, Sweden, especially since the island has set targets to generate 100% of its energy from renewable sources by 2025. Due to the variability of wind conditions, energy storage will be an important technology to facilitate the continued development of wind energy on Gotland and ensure a stable and secure supply of electricity. In this study, the feasibility of utilizing the Middle Cambrian Faludden sandstone reservoir on Gotland for Compressed Air Energy Storage (CAES) is assessed. Firstly, a characterization of the sandstone beneath Gotland is presented, which includes detailed maps of reservoir thickness and top reservoir structure. Analysis of this information shows that the properties of the Faludden sandstone and associated cap rock appear favorable for the application of CAES. Seven structural closures are identified below the eastern and southern parts of Gotland, which could potentially be utilized for CAES. Scoping estimates of the energy storage capacity and flow rate for these closures within the Faludden sandstone show that industrial scale CAES could be possible on Gotland.

  • 5.
    Zeballos, Ariana
    et al.
    Luleå tekniska universitet, Geovetenskap och miljöteknik.
    Weihed, Pär
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper. Luleå tekniska universitet.
    Blanco, Mario
    IGEMA, Universidad Mayor de San Andres, La Paz.
    Machaca, Vladimir
    IGEMA, Universidad Mayor de San Andres, La Paz.
    Geological, mineralogical and chemical characterization of Devonian kaolinite-bearing sediments for further applications in the ceramic (tiles) industry in La Paz, Bolivia2016Inngår i: Environmental Earth Sciences, ISSN 1866-6280, E-ISSN 1866-6299, Vol. 75, nr 7, artikkel-id 546Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Clay minerals are widely distributed in Bolivia; among them, illitic clays are most common in the Altiplano where they are mined for use in the ceramic industry that has been growing in the last few years. In addition to illitic sediments, kaolinitic sediments have been recently discovered in sedimentary units in the Bolivian Altiplano. Residual ball clay occurrences in Devonian sedimentary units were studied as part of this work. Geological mapping and geophysical studies (ERT and GPR) were done for better understanding the origin of the deposits and were part of a preliminary study of the mineral potential to define the relationship with the host rock. Chemical and mineralogical techniques such as X-Ray Diffraction, Scanning Electron Microscopy and Inductively Coupled Plasma analyses were performed in samples from the studied area to verify the presence of kaolinite. Atterberg limits and behaviour of the raw material in ceramic specimens supported by chemical analyses show that this material is suitable for manufacturing tile ceramics. This study provides fundamental knowledge for deposit exploitation and future generation of an alternative source of employment for the inhabitants of Micaya

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