Skip to main content

EN
ÍS

Forsíða

Forsíða

Kristín Vala Ragnarsdóttir - Prófessor emerita

Kristín Vala Ragnarsdóttir

–

Verkfræði- og náttúruvísindasvið

Kristín Vala Ragnarsdóttir

Prófessor emerita

Sjálfbærnivísindi

Aðsetur
Askja / N-226
Sími
5255886 8949502
Tölvupóstur
vala [hjá] hi.is

Starfseining
Jarðvísindadeild
Vefsíða
https://orcid.org/0000-0001-6958-0734

ORCID vefsíða
https://orcid.org/0000-0001-6958-0734
Rannsóknagátt – Kristín Vala Ragnarsdóttir

Show Starfsferill

2008 - 2008, Forseti Verkfræði og Náttúruvísindasviðs, Háskóla Íslands
2006 - 2008, Prófessor í Umhverfissjálfbærni, Bristolháskóla Bristol Bretlandi
2001 - 2006, Prófessor í Umhverfisjarðefnafræði, Jarðvísindadeild Bristolháskóla Bristol Bretlandi
1997 - 2001, Dósent, Jarðfræðideild Bristolháskóla Bristol Bretlandi
1994 - 1997, Lektor, Jarðfræðideild Bristolháskóla Bristol Bretlandi
1989 - 1994, Vísindamaður, Jarðfræðideild Bristolháskóla Bretlandi
1988 - 1989, Rannsóknalektor, Jarðfræðideild Northwestern Háskóli Evanston Illinois Bandaríkjunum
1986 - 1987, Nýdoktor, Institute de Physique du Globe Parísarháskóla París Frakklandi
1985 - 1986, Jarðefnafræðingur, PRC Environmental Management Chicago Illinois Bandaríkjunum

Show Útgefið efni

2022

Transformation Literacy
Everything is connected – Envisioning how a regenerative world looks like
Preface
Approaching the Study of Corruption and Natural Resources through Qualitative System DynamicsResources
Transparency and Leverage Points for Sustainable Resource ManagementSustainability
Setting the Scene: Viewing the World as Interconnected Systems
Wellbeing economyEcological Economics
Introduction and Conceptual Framing—Transformation Literacy as a Future-Making Skill
Regenerative Wellbeing Economy
Where do we start? How did we get here?

2021

Development of a Biophysical Economics Module for the Global Integrated Assessment Model WORLD7
Economies of scale and perceived corruption in natural resource managementSustainability (Switzerland)

2020

Investing in nature to transform the post COVID-19 economySolutions
Investing in Nature as the true engine of our economy
Global phosphorus supply chain dynamics: Assessing regional impact to 2050Global Food Security
Corruption risks in renewable resource governancePolitics and Governance
After the crisisSolutions

2019

On the Metal Contents of Ocean Floor Nodules, Crusts and Massive Sulphides and a Preliminary Assessment of the Extractable Amounts
The WORLD6 Integrated System Dynamics Model: Examples of Results from Simulations
Opening access to the black box: The need for reporting on the global phosphorus supply chainAmbio
On the long-term sustainability of copper, zinc and lead supply, using a system dynamics modelResources, Conservation and Recycling: X

2018

A System Dynamics Assessment of the Supply of Molybdenum and Rhenium Used for Super-alloys and Specialty Steels, Using the WORLD6 Model.Biophysical Economics and Resource Quality
From waste to resource: A systems dynamics and stakeholder analysis of phosphorus recycling from municipal wastewater in EuropeAmbio
Developing the WORLD6 integrated global model; causally linking natural resource use, population, energy, commodities, health, governance and the economy
A system dynamics assessment of the supply of molybdenum and rhenium used for super-alloys and speciality steels, using the WORLD6 modelBiophysical Economics and Resource Quality
Economic Challenges of the UN Sustainable Development GoalsSystem Change
Reviewing integrated sustainability indicators for tourismJournal of Sustainable Tourism

2017

Soil Functions in Earth's Critical Zone
Soil aggregation and soil organic matter in conventionally and organically farmed Austrian ChernozemsBodenkultur
Stakeholder participation in developing sustainability indicators for a European Northern Periphery Tourism systemJournal of Rural and Community Development
Global Megatrends and Resource Use - A Systemic Reflection
Exstimating critical extraction rates for the main metals for a sustainable society within the planetary limits
Modelling the global primary extraction , supply, price and depletion of the extractable geological resources using the cobalt model
Substitution of metals in times of potential supply limitations: What are the mitigation options and limitations?
Defining a free marketJournal of Cleaner Production
Renewable energy use for aquaponics development on a global scale towards sustainable food production
An assessment of metal supply sustainability as an input to policyJournal of Cleaner Production
Modelling the global copper, zinc and lead mining rates and co-extraction of technology metals, market supply, price and remaining extractable amounts
Integrated modelling of the global cobalt extraction, supply, price and depletion of extractable resources using WORLD6 modelBiophysical Economics and Resource Quality

2016

Modelling and measuring sustainable wellbeing in connection with the UN Sustainable Development GoalsEcological Economics
Soil indicators for sustainable developmentAgriculture, Ecosystems and Environment
A system dynamics model for platinum group metal supply, market price, depletion of extractable amounts, ore grade, recycling and stocks-in-useResources, Conservation and Recycling
How does permaculture stack up in the real economy?Permaculture Design

2015

Energy return on investment of Austrian sugar beet: A small-scale comparison between organic and conventional productionBiomass and Bioenergy
Aluminium for the futureResources, Conservation and Recycling
Aggregation and organic matter in subarctic Andosols under different grassland managementActa Agriculturae Scandinavica - Section B Soil and Plant Science
An ecosystem approach to assess soil quality in organically and conventionally managed farms in Iceland and AustriaSOIL
Challenges of sustainable and commercial aquaponicsSustainability (Switzerland)
Aquaponics Guidelines
The Interlayer Regions of Sheet Silicates as a Favorable Habitat for Endolithic MicroorganismsGeomicrobiology Journal
A comparative analysis of the energy return on investment of organic and conventional Icelandic dairy farmsIcelandic Agricultural Sciences
The value of soil ecosystem services
Soil and Earth's Critical Zone

2014

SoilTrECEnvironmental Science and Pollution Research
On modelling the global copper mining rates, market supply, copper price and the end of copper reservesResources, Conservation and Recycling
Investigating the sustainability of the global silver supply, reserves, stocks in society and market price using different approachesResources, Conservation and Recycling
Si precipitation during weathering in different Icelandic AndosolsProcedia Earth and Planetary Science
Soil aggregate stability in different soil orders quantified by low dispersive ultrasonic energy levelsSoil Science Society of America Journal
Urban Systems, Current Status. The Geology
Chlorite topography and dissolution of the interlayer studied with atomic force microscopyAmerican Mineralogist
DevelopmentNature
Natural resources in a planetary perspectiveGeochemical Perspectives
Bioremediation trial on aged PCB-polluted soils-a bench study in IcelandEnvironmental Science and Pollution Research

2013

Investigating the role of microbes in mineral weatheringMicron
Nanoscale Observations of Extracellular Polymeric Substances Deposition on Phyllosilicates by an Ectomycorrhizal FungusGeomicrobiology Journal
A new post-crash constitution in Iceland?solutions
Peak metals, minerals, energy, wealth, food and populationJournal of Environmental Science and Engineering A
The Future we Really WantSolutions
The need for a fair and sustainable development paradigm in an urban worldICLE Local Governments for Sustainability
Sustaining Earth's Critical Zone

2012

Assessing Long Term Sustainability of Global Supply of Natural Resources and Materials
Nanoscale channels on ectomycorrhizal-colonized chloriteJournal of Geophysical Research: Biogeosciences
Modelling the initiation, progress, symptoms expressions and possible treatment of multiple sclerosis using an integrated simulation systems dynamics model
High resolution characterization of ectomycorrhizal fungal-mineral interactions in axenic microcosm experimentsBiogeochemistry
Conclusions
Pollutants, Human Health and the Environment
Foreword
Introduction
Pollutants, Human Health and the Environment
Exploring a city's potential low carbon futures using Delphi methodsJournal of Environmental Planning and Management
Removal of uranium(VI), lead(II) at the surface of TiO ₂ nanotubes studied by x-ray photoelectron spectroscopyWater, Air, and Soil Pollution
The World 5 model; Peak metals, minerals, energy, wealth, food and population; urgent policy considerations for a sustainable society
Soil processes and functions across an international network of Critical Zone ObservatoriesComptes Rendus - Geoscience
Radioactivity and Radioelements
Assessing the impact of soil degradation on food productionCurrent Opinion in Environmental Sustainability

2011

Samleiðniverkefnið – sjálfbærni og jafnrétti innan þolmarka jarðarinnar
Envisioning the FutureInternational Journal of Climate Change: Impacts and Responses
In situ atomic force microscopy measurements of biotite basal plane reactivity in the presence of oxalic acidGeochimica et Cosmochimica Acta
Challenging the planetary boundaries IIApplied Geochemistry
Response of soil to different farming practices – case studies in Iceland and Austria
Íslenska efnahagshrunið
Biochar application in a tropical, agricultural region: a plot scale study in Tamil Nadu, India
Challenging the planetary boundaries IApplied Geochemistry
Soil processes and func tions in critical zone observatoriesVadose Zone Journal
Pollutants, human health and the environmenta – A risk-based approach

2010

City-scale carbon management
Education for Sustainable Development in Geography, Earth and Environmental Sciences: A Promising Place to Start

2009

TiO₂ anatase nanotubes for the purification of uranium,arsenic and lead containing water
TiO₂ anatase nanotubes for the purification of uranium,arsenic and lead containing water
The Cu, Mn and Zn concentration of sheep woolScience of the Total Environment
TiO₂ anatase nanotubes for the purification of uranium, arsenic and lead containing water
The effects of prion protein expression on metal metabolismMolecular and Cellular Neuroscience

2008

Rare metals getting rarerNature Geoscience
Effect of cyanobacterial growth on biotite surfaces under laboratory nutrient-limited conditionsMineralogical Magazine
The adsorption of progesterone onto mineral surfaces imaged with high-resolution atomic force microscopyMineralogical Magazine
Risk Assessment Linked to Monitoring and Management
Re-partitioning of Cu and Zn isotopes by modified protein expressionGeochemical Transactions
Reaction mechanism of uranyl in the presence of zero-valent iron nanoparticlesGeochimica et Cosmochimica Acta
High-resolution imaging of biotite dissolution and measurement of activation energyMineralogical Magazine

2007

Crossing disciplines and scales to understand the critical zoneElements
Non-ideal solid solution aqueous solution modeling of synthetic calcium silicate hydrateCement and Concrete Research
Chapter 5 Prions, Metals, and Soils
Copper deficiency elicits glial and neuronal response typical of neurodegenerative disordersNeuropathology and Applied Neurobiology
Geomicrobiology of a weathering crust from an impact crater and a hypothesis for its formationGeomicrobiology Journal
Measurements of daily urinary uranium excretion in German peacekeeping personnel and residents of the Kosovo region to assess potential intakes of depleted uranium (DU)Science of the Total Environment
Modelling the degradation of ordinary Portland cement using PHREEQC

2006

Bioavailable copper and manganese in soils from Iceland and their relationship with scrapie occurrence in sheepJournal of Geochemical Exploration
The effect of iron on montmorillonite stability. (II) Experimental investigationGeochimica et Cosmochimica Acta
The effect of iron on montmorillonite stability. (I) Background and thermodynamic considerationsGeochimica et Cosmochimica Acta

2005

Kinetic studies of synthetic metaschoepite under acidic conditions in batch and flow experimentsEnvironmental Science and Technology
The geochemistry of fluids from an active shallow submarine hydrothermal systemJournal of Volcanology and Geothermal Research

2004

From copper, manganese and molybdenum speciation in the natural environment to their speciation in the body

2003

Hydrous ferric oxideJournal of Colloid and Interface Science
The reduction of aqueous Au³⁺ by sulfide minerals and green rust phasesAmerican Mineralogist
Dissolution mechanism of UO3 .2H2O far from the thermodynamic equilibrium at room temperature
Surface reactivity of volcanic ash from the eruption of Soufrière Hills volcano, Montserrat, West Indies with implications for health hazardsEnvironmental Research

2002

Environmental Fate of the Trace Elements Copper and Manganese in Soils
A potentiometric study of Eu³⁺ complexation with acetate ligand from 25 to 170°C at P_satGeochimica et Cosmochimica Acta

2001

Sorption of As(V) on green rust (Fe₄(II)Fe₂(III)(OH)₁₂SO₄ - 3H₂O) and lepidocrocite (γ-FeOOH)Geochimica et Cosmochimica Acta
Experimental determination of the complexation of strontium and cesium with acetate in high-temperature aqueous solutionsGeochimica et Cosmochimica Acta

2000

Influence of anionic layer structure of Fe-oxyhydroxides on the structure of Cd surface complexesJournal of Colloid and Interface Science
Speciation of tin (Sn²⁺ and Sn⁴⁺) in aqueous Cl solutions from 25°C to 350°CChemical Geology
Environmental fate and toxicology of organophosphate pesticidesJournal of the Geological Society
Novel techniques in a study of the mechanism of ACR
The boron isotope systematics of Icelandic geothermal watersGeochimica et Cosmochimica Acta
Complexation of Cu²⁺ in oxidized NaCl brines from 25°C to 175°CChemical Geology
Antimony transport in hydrothermal solutionsChemical Geology
Trace element partitioning between wollastonite and silicate-carbonate meltMineralogical Magazine
Environmental behaviour of uranium

1999

Mineral/reagent interactionsClay Minerals
Effect of inorganic and organic ligands on the mechanism of cadmium sorption to goethiteGeochimica et Cosmochimica Acta
Pesticide toxicology and behaviour in the natural environment
Surface complexation of Hg²⁺ on goethiteJournal of Colloid and Interface Science
The mechanism of cadmium surface complexation on iron oxyhydroxide mineralsGeochimica et Cosmochimica Acta

1998

Geochemistry of crustal fluidsChemical Geology
The dissolution of apatite in the presence of aqueous metal cations at pH 2-7Chemical Geology
Aqueous speciation of yttrium at temperatures from 25 to 340°C at P_satChemical Geology
Standard Thermodynamic Properties and Heat Capacity Equations for Rare Earth Element HydroxidesRadiochimica Acta
Standard thermodynamic properties and heat capacity equations of rare earth hydroxidesChemical Geology
An extended X-ray absorption fine structure spectroscopy investigation of cadmium sorption on cryptomelane (KMn₈O₁₆)Chemical Geology
An EXAFS spectroscopic study of aqueous antimony(III)-chloride complexation at temperatures from 25 to 250°CChemical Geology
The Adsorption Mechanism of Sr²⁺ on the Surface of GoethiteRadiochimica Acta
XPS analysis of polyacrylamide adsorption to kaolinite, quartz and feldsparSurface and Interface Analysis

1997

Controls on polyacrylamide adsorption to quartz, kaolinite, and feldsparGeochimica et Cosmochimica Acta
Controls on uranium and thorium behaviour in ocean-floor hydrothermal systemsChemical Geology
Mineral/reagent interactions: An X-ray photoelectron spectroscopic study of adsorption of reagents onto mixtures of minerals
Mineralogical changes occurring within aggregates affected by alkali-carbonate reactivity
Solubility of Uranium Oxide and Calcium Uranate in Water, and Ca(OH)₂-bearing SolutionsRadiochimica Acta
SEM study of the expansion mechanisms of alkali carbonate reactions
Application of focused ion beam optical spectroscopy (FIBOS) to alkali aggregate reactivity in concrete
Application of focused ion beam optical spectroscopy (FIBOS) to alkali aggregate reactivity in concrete

1996

Spectroscopic studies of alkali-induced reactions at cement carbonaceous aggregate interfaces
Determination of the rare earth elements in aqueous samples at sub-ppt levels by inductively coupled plasma mass spectrometry and flow injection ICPMSAnalytical Chemistry
Surface chemistry of reacted heulandite determined by SIMS and XPSChemical Geology
Flow and Transport During Contact Metamorphism and Hydrothermal Activity: Examples from the Oslo Rift
LREE distribution in perovskite, apatite and titanite from South West Ugandan xenoliths and kamafugite lavasMineralogy and Petrology
Computer aided analysis of X-ray images in mudstone concretions from Budleigh Salterton, DevonGeoscience in South-West England
First principles (quantum mechanical) calculations of the relative stabilities of metal chloride and simple organic complexes
An experimental investigation of the potential of apatite as radionuclide and heavy metal scavenger

1995

On the origin of zoned grossular-andradite garnets in hydrothermal systemsEuropean Journal of Mineralogy

1994

Uranium and thorium solubilities in subduction zone fluidsEarth and Planetary Science Letters
Ejection of trace metals from volcanoesMineralogical Magazine
The uranium-thorium and rare earth element geochemistry of reduction nodules from Budleigh Salterton, DevonGeoscience in South-West England

1993

Dissolution kinetics of heulandite at pH 2-12 and 25°CGeochimica et Cosmochimica Acta
Determination of uranium and thorium in basalts and uranium in aqueous solution by inductively coupled plasma mass spectrometryJournal of Analytical Atomic Spectrometry

1985

Experimental determination of corundum solubilities in pure water between 400-700°C and 1-3 kbarGeochimica et Cosmochimica Acta

1984

Description and interpretation of the composition of fluid and alteration mineralogy in the geothermal system, at Svartsengi, IcelandGeochimica et Cosmochimica Acta

1983

Pressure sensitive "silica geothermometer" determined from quartz solubility experiments at 250 °CGeochimica et Cosmochimica Acta

1982

Mechanical restitution of the rat papillary muscleActa Physiologica Scandinavica