Andreas Luttge
University of Bremen
Publications 149
Understanding mineral dissolution is relevant for natural and industrial processes that involve the interaction of crystalline solids and fluids. The dissolution of slow dissolving minerals is typically surface controlled as opposed to diffusion/transport controlled. At these conditions, the dissolution rate is no longer constant in time or space, an outcome observed in rate maps and correspondent rate spectra. The contribution and statistical prevalence of different dissolution mechanisms is no...
#1Corina Ionescu (Kazan: Kazan Federal University)H-Index: 8
#2Cornelius Fischer (University of Bremen)H-Index: 17
Last.Andreas Luttge (Rice University)H-Index: 32
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#1Andreas Luttge (Rice University)H-Index: 32
#2Rolf S. Arvidson (Rice University)H-Index: 21
Last.Inna Kurganskaya (Rice University)H-Index: 6
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Abstract In a unique “perspectives” format that examines both past and future, we appraise the field of crystal dissolution kinetics, showing how the last century's strong progress in experimental discovery has both driven, and been driven by, the tandem evolution of basic theory. To provide context for examining the current state-of-the-art in this critical field, we highlight the key milestones that have punctuated our progress in understanding the dynamics of crystalline surfaces. For crystal...
2 CitationsSource
#1Janis Heuer (University of Bremen)H-Index: 1
#2Andreas Luttge (University of Bremen)H-Index: 32
The corrosion and degradation of materials, such as pipeline steel, have a strong effect on both the environment and the economy. The quantification of these processes can therefore provide important information needed to manage their impact. In this study, a concept for the characterization and quantification of corrosion is demonstrated on API X70 steel immersed in 3.5 wt.% NaCl solution. Due to the difficulty of quantifying corrosion rates, e.g., through single mean values, a unique system is...
1 CitationsSource
#2Sabry M. ShaheenH-Index: 3
Last.Andreas LuttgeH-Index: 32
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#1Irshad BibiH-Index: 20
#2Rolf S. ArvidsonH-Index: 21
Last.Andreas LuttgeH-Index: 32
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This brief paper presents a rare dataset: a set of quantitative, topographic measurements of a dissolving calcite crystal over a relatively large and fixed field of view (~400 μm2) and long total reaction time (>6 h). Using a vertical scanning interferometer and patented fluid flow cell, surface height maps of a dissolving calcite crystal were produced by periodically and repetitively removing reactant fluid, rapidly acquiring a height dataset, and returning the sample to a wetted, reacting stat...
3 CitationsSource
#1Muhammad Bilal Shakoor (H.I., S.I.: University of Agriculture, Faisalabad)H-Index: 16
#2Irshad Bibi (H.I., S.I.: University of Agriculture, Faisalabad)H-Index: 20
Last.Andreas Luttge (University of Bremen)H-Index: 32
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Abstract In this study, we tested 123 groundwater wells from five different areas of Punjab, Pakistan for arsenic (As) contamination level and species, as well as delineated hydrogeochemical behaviour of As in aquifers. Results revealed that 75% and 41% of the groundwater wells exceeded the safe As limit of World Health Organisation (WHO, 10 μg L −1 ) and Pakistan-EPA (50 μg L −1 ), respectively. Arsenite (As(III)) and arsenate (As(V)) spanned 0–80% and 20–100% of total As (1.2–206 μg L −1 ), re...
29 CitationsSource
#1Cornelius Fischer (University of Bremen)H-Index: 17
#2Inna Kurganskaya (University of Bern)H-Index: 6
Last.Andreas Luttge (Rice University)H-Index: 32
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Abstract Material and environmental sciences have a keen interest in the correct prediction of material release as a result of fluid-solid interaction. For crystalline materials, surface reactivity exerts fundamental control on dissolution reactions; however, it is continuously changing during reactions and governs the dynamics of porosity evolution. Thus, surface area and topography data are required as input parameters in reactive transport models that deal with challenges such as corrosion, C...
6 CitationsSource
#1Ricarda D. RohlfsH-Index: 1
#2Cornelius FischerH-Index: 17
Last.Andreas LuttgeH-Index: 32
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Kinetic Monte Carlo (kMC) methods have been used extensively for the study of crystal dissolution kinetics and surface reactivity. A current restriction of kMC simulation calculations is their limitation in spatial system size. Here, we explore a new and very fast method for the calculation of the reaction kinetics of a dissolving crystal, capable of being used for much larger systems. This method includes a geometrical approach, the Voronoi distance map, to generate the surface morphology, incl...
3 CitationsSource
Fluid–solid reactions result in material flux from or to the solid surface. The prediction of the flux, its variations, and changes with time are of interest to a wide array of disciplines, ranging from the material and earth sciences to pharmaceutical sciences. Reaction rate maps that are derived from sequences of topography maps illustrate the spatial distribution of reaction rates across the crystal surface. Here, we present highly spatially resolved rate maps that reveal the existence of rhy...
8 CitationsSource