All Outputs (88)

Understanding cationic polymer adsorption on mineral surfaces: kaolinite in cement aggregates (2018)
Journal Article
Jacquet, A., Geatches, D. L., Clark, S. J., & Greenwell, H. C. (2018). Understanding cationic polymer adsorption on mineral surfaces: kaolinite in cement aggregates. Minerals, 8(4), Article 130. https://doi.org/10.3390/min8040130

We present a joint experimental and theoretical investigation into the adsorption of polycationic quaternary ammonium polymers on the clay mineral kaolinite. Within the cement and concrete manufacturing industries such polymers are used to improve th... Read More about Understanding cationic polymer adsorption on mineral surfaces: kaolinite in cement aggregates.

Aqueous Immiscible Layered Double Hydroxides: Synthesis, Characterisation and Molecular Dynamics Simulation (2018)
Journal Article
Ruengkajorn, K., Erastova, V., Buffet, J., Greenwell, H. C., & O'Hare, D. (2018). Aqueous Immiscible Layered Double Hydroxides: Synthesis, Characterisation and Molecular Dynamics Simulation. Chemical Communications, 54(35), 4394-4397. https://doi.org/10.1039/c8cc00528a

We describe a novel post treatment for layered double hydroxide (LDH) materials using aqueous immiscible (AIM) solvents resulting in improved surface area and powder flow. The effect of solvent functional groups and structure are explored, aided by m... Read More about Aqueous Immiscible Layered Double Hydroxides: Synthesis, Characterisation and Molecular Dynamics Simulation.

Ultra-high aspect ratio hybrid materials: The role of organic guest and synthesis method (2018)
Journal Article
Gudiyor Veerabhadrappa, M., Li, L., Whiting, A., & Greenwell, H. C. (2018). Ultra-high aspect ratio hybrid materials: The role of organic guest and synthesis method. Dalton Transactions, 47(9), 2933-2938. https://doi.org/10.1039/c7dt04312k

Hybrid organic-inorganic layered double hydroxide materials have been prepared with an ultra-high aspect ratio via an environmentally friendly co-hydration approach where metal hydroxides and adamantane-carboxylic acid were used as the reagents. The... Read More about Ultra-high aspect ratio hybrid materials: The role of organic guest and synthesis method.

The Water-Alkane Interface at Various NaCl Salt Concentrations: A Molecular Dynamics Study of the Readily Available Force Fields (2018)
Journal Article
Underwood, T. R., & Greenwell, H. C. (2018). The Water-Alkane Interface at Various NaCl Salt Concentrations: A Molecular Dynamics Study of the Readily Available Force Fields. Scientific Reports, 8, Article 352. https://doi.org/10.1038/s41598-017-18633-y

In this study, classical molecular dynamic simulations have been used to examine the molecular properties of the water-alkane interface at various NaCl salt concentrations (up to 3.0 mol/kg). A variety of different force field combinations have been... Read More about The Water-Alkane Interface at Various NaCl Salt Concentrations: A Molecular Dynamics Study of the Readily Available Force Fields.

Chemical Force Microscopy Study on the Interactions of COOH Functional Groups with Kaolinite Surfaces: Implications for Enhanced Oil Recovery (2017)
Journal Article
Santha, N., Cubillas, P., Saw, A., Brooksbank, H., & Greenwell, H. C. (2017). Chemical Force Microscopy Study on the Interactions of COOH Functional Groups with Kaolinite Surfaces: Implications for Enhanced Oil Recovery. Minerals, 7(12), Article 250. https://doi.org/10.3390/min7120250

Clay–oil interactions play a critical role in determining the wettability of sandstone oil reservoirs, which, in turn, governs the effectiveness of enhanced oil recovery methods. In this study, we have measured the adhesion between –COOH functional g... Read More about Chemical Force Microscopy Study on the Interactions of COOH Functional Groups with Kaolinite Surfaces: Implications for Enhanced Oil Recovery.

Understanding model crude oil component interactions on kaolinite silicate and aluminol surfaces: towards improved understanding of shale oil recovery (2017)
Journal Article
Tian, S., Erastova, V., Lu, S., Greenwell, H. C., Underwood, T., Xue, H., …Zhao, R. (2018). Understanding model crude oil component interactions on kaolinite silicate and aluminol surfaces: towards improved understanding of shale oil recovery. Energy and Fuels, 32(2), 1155-1165. https://doi.org/10.1021/acs.energyfuels.7b02763

Shale oil is currently of interest for unconventional resource exploration and development. Understanding the mechanism of interaction between the complex mixture of organic compounds in shale oil and minerals making up the reservoir rock-oil interfa... Read More about Understanding model crude oil component interactions on kaolinite silicate and aluminol surfaces: towards improved understanding of shale oil recovery.

Mineral Surface Chemistry Control for Origin of Prebiotic Peptides (2017)
Journal Article
Erastova, V., Degiacomi, M. T., Fraser, D., & Greenwell, H. C. (2017). Mineral Surface Chemistry Control for Origin of Prebiotic Peptides. Nature Communications, 8, Article 2033. https://doi.org/10.1038/s41467-017-02248-y

Some seventy years ago, John Desmond Bernal proposed a role for clays in the origin of life. While much research has since been dedicated to the study of silicate clays, layered double hydroxides, believed to be common on the early Earth, have receiv... Read More about Mineral Surface Chemistry Control for Origin of Prebiotic Peptides.

Analytical solution for clay plug swelling experiments (2017)
Journal Article
Mathias, S., Greenwell, H., Withers, C., Erdogan, A., McElwaine, J., & MacMinn, C. (2017). Analytical solution for clay plug swelling experiments. Applied Clay Science, 149, 75-78. https://doi.org/10.1016/j.clay.2017.07.021

Clay swelling experiments frequently involve monitoring the one-dimensional displacement with time of an initially dry clay plug as it imbibes water from a supply at its base. This article presents a new analytical solution for interpreting such expe... Read More about Analytical solution for clay plug swelling experiments.

Translocation of isotopically distinct macroalgae: a route to low-cost biomonitoring? (2017)
Journal Article
Gröcke, D., Racionero-Gómez, B., Marschalek, J., & Greenwell, H. (2017). Translocation of isotopically distinct macroalgae: a route to low-cost biomonitoring?. Chemosphere, 184, 1175-1185. https://doi.org/10.1016/j.chemosphere.2017.06.082

Nitrogen stable isotope ratios (δ15N) in macroalgae are often used to identify sources of nitrogenous pollution in fluvial and estuarine settings. This approach assumes that the macroalgal δ15N is representative of the sources of the pollution averag... Read More about Translocation of isotopically distinct macroalgae: a route to low-cost biomonitoring?.

Understanding surface interactions in aqueous miscible organic solvent treated layered double hydroxides (2016)
Journal Article
Erastova, V., Degiacomi, M. T., O'Hare, D., & Greenwell, H. C. (2017). Understanding surface interactions in aqueous miscible organic solvent treated layered double hydroxides. RSC Advances, 7(9), 5076-5083. https://doi.org/10.1039/c6ra26834j

Layered materials are of interest for use in a wealth of technological applications, many of which require a high surface area for optimal properties and performance. Recently, an industrially scalable method to create high surface area layered doubl... Read More about Understanding surface interactions in aqueous miscible organic solvent treated layered double hydroxides.

The nutritional aspects of biorefined Saccharina latissima, Ascophyllum nodosum and Palmaria palmata (2016)
Journal Article
Schiener, P., Zhao, S., Theodoridou, K., Carey, M., Mooney-McAuley, K., & Greenwell, H. (2017). The nutritional aspects of biorefined Saccharina latissima, Ascophyllum nodosum and Palmaria palmata. Biomass Conversion and Biorefinery, 7(2), 221-235. https://doi.org/10.1007/s13399-016-0227-5

The chemical profile of biorefined Saccharina latissima, Ascophyllum nodosum and Palmaria palmata after carbohydrate and polyphenol extraction was analysed with the aim to evaluate the nutritional aspects of biorefined seaweeds as a novel animal feed... Read More about The nutritional aspects of biorefined Saccharina latissima, Ascophyllum nodosum and Palmaria palmata.

Osmium uptake, distribution, and 187Os/188Os and 187Re/188Os compositions in Phaeophyceae macroalgae, Fucus vesiculosus: Implications for determining the 187Os/188Os composition of seawater (2016)
Journal Article
Racionero-Gómez, B., Sproson, A., Selby, D., Gannoun, A., Gröcke, D., Greenwell, H., & Burton, K. (2016). Osmium uptake, distribution, and 187Os/188Os and 187Re/188Os compositions in Phaeophyceae macroalgae, Fucus vesiculosus: Implications for determining the 187Os/188Os composition of seawater. Geochimica et Cosmochimica Acta, 199, 48-57. https://doi.org/10.1016/j.gca.2016.11.033

The osmium isotopic composition (187Os/188Os) of seawater reflects the balance of input from mantle-, continental- and anthropogenic-derived sources. This study utilizes the Phaeophyceae, Fucus vesiculosus, to analyse its Os abundance and uptake, as... Read More about Osmium uptake, distribution, and 187Os/188Os and 187Re/188Os compositions in Phaeophyceae macroalgae, Fucus vesiculosus: Implications for determining the 187Os/188Os composition of seawater.

Changes in higher heating value and ash content of seaweed during ensiling (2016)
Journal Article
Redden, H., Milledge, J. J., Greenwell, H. C., Dyer, P. W., & Harvey, P. J. (2017). Changes in higher heating value and ash content of seaweed during ensiling. Journal of Applied Phycology, 29(2), 1037-1046. https://doi.org/10.1007/s10811-016-0975-4

A problem in the use of macroalgae for biofuel is that harvesting of seaweed is generally seasonal, and there is a need to preserve and store seaweed to supply year-round production processes. Ensiling is a widely used preservation method in agricult... Read More about Changes in higher heating value and ash content of seaweed during ensiling.

Multi-technique approach to the petrophysical characterization of Berea sandstone core plugs (Cleveland Quarries, USA) (2016)
Journal Article
Kareem, R., Cubillas, P., Gluyas, J., Bowen, L., Hillier, S., & Greenwell, H. (2017). Multi-technique approach to the petrophysical characterization of Berea sandstone core plugs (Cleveland Quarries, USA). Journal of Petroleum Science and Engineering, 149, 436-455. https://doi.org/10.1016/j.petrol.2016.09.029

Berea sandstone has been used by the petroleum industry as a representative model siliciclastic rock for a number of years. However, only incomplete data has been reported in the literature regarding its petrographic, geochemical, and petrophysical p... Read More about Multi-technique approach to the petrophysical characterization of Berea sandstone core plugs (Cleveland Quarries, USA).

Ion Adsorption at Clay Mineral Surfaces: The Hofmeister Series for Hydrated Smectite Minerals (2016)
Journal Article
Underwood, T., Erastova, V., & Greenwell, H. (2016). Ion Adsorption at Clay Mineral Surfaces: The Hofmeister Series for Hydrated Smectite Minerals. Clays and Clay Minerals, 64(4), 472-487. https://doi.org/10.1346/ccmn.2016.0640310

Many important properties of clay minerals are defined by the species of charge-balancing cation. Phenomena such as clay swelling and cation exchange depend on the cation species present, and understanding how the cations bind with the mineral surfac... Read More about Ion Adsorption at Clay Mineral Surfaces: The Hofmeister Series for Hydrated Smectite Minerals.

Rhenium uptake and distribution in phaeophyceae macroalgae, Fucus vesiculosus (2016)
Journal Article
Racionero-Gómez, B., Sproson, A., Selby, D., Gröcke, D., Redden, H., & Greenwell, H. (2016). Rhenium uptake and distribution in phaeophyceae macroalgae, Fucus vesiculosus. Royal Society Open Science, 3(5), Article 160161. https://doi.org/10.1098/rsos.160161

Owing to Rhenium (Re) having no known biological role, it is not fully understood how Re is concentrated in oil kerogens. A commonly held assumption is that Re is incorporated into decomposing biomass under reducing conditions. However, living macroa... Read More about Rhenium uptake and distribution in phaeophyceae macroalgae, Fucus vesiculosus.

Wetting Effects and Molecular Adsorption at Hydrated Kaolinite Clay Mineral Surfaces (2016)
Journal Article
Underwood, T., Erastova, V., & Greenwell, H. (2016). Wetting Effects and Molecular Adsorption at Hydrated Kaolinite Clay Mineral Surfaces. Journal of Physical Chemistry C, 120(21), 11433-11449. https://doi.org/10.1021/acs.jpcc.6b00187

In this study, classical molecular dynamics simulations have been used to understand the key interactions and surface structure of a set of organic molecules at the hydrated surfaces of the 1:1 clay mineral kaolinite. Decane, decanoic acid, and decan... Read More about Wetting Effects and Molecular Adsorption at Hydrated Kaolinite Clay Mineral Surfaces.

Insights into the Behaviour of Biomolecules on the Early Earth: The Concentration of Aspartate by Layered Double Hydroxide Minerals (2015)
Journal Article
Grégoire, B., Erastova, V., Geatches, D. L., Clark, S. J., Greenwell, H. C., & Fraser, D. G. (2016). Insights into the Behaviour of Biomolecules on the Early Earth: The Concentration of Aspartate by Layered Double Hydroxide Minerals. Geochimica et Cosmochimica Acta, 176, 239-258. https://doi.org/10.1016/j.gca.2015.12.026

The role of mineral surfaces in concentrating and facilitating the polymerisation of simple protobiomolecules during the Hadean and Archean has been the subject of much research in order to constrain the conditions that may have led to the origin of... Read More about Insights into the Behaviour of Biomolecules on the Early Earth: The Concentration of Aspartate by Layered Double Hydroxide Minerals.

Geochemical and lithological controls on a potential shale reservoir: Carboniferous Holywell Shale, Wales (2015)
Journal Article
Newport, L. P., Aplin, A. C., Gluyas, J. G., Greenwell, H. C., & Gröcke, D. R. (2015). Geochemical and lithological controls on a potential shale reservoir: Carboniferous Holywell Shale, Wales. Marine and Petroleum Geology, 71, 198-210. https://doi.org/10.1016/j.marpetgeo.2015.11.026

The Holywell Shale is part of the Carboniferous Bowland Shale Formation, identified as the main potential shale gas system in the UK. Here, we report geochemical and petrographic data from five outcrops of the Lower and Upper Holywell Shale across no... Read More about Geochemical and lithological controls on a potential shale reservoir: Carboniferous Holywell Shale, Wales.

Towards a Mechanistic Understanding of Carbon Stabilization in Manganese Oxides (2015)
Journal Article
Johnson, K., Purvis, G., Lopez-Capel, E., Peacock, C., Gray, N., Wagner, T., …Greenwell, C. (2015). Towards a Mechanistic Understanding of Carbon Stabilization in Manganese Oxides. Nature Communications, 6, Article 7628. https://doi.org/10.1038/ncomms8628

Minerals stabilize organic carbon (OC) in sediments, thereby directly affecting global climate at multiple scales, but how they do it is far from understood. Here we show that manganese oxide (Mn oxide) in a water treatment works filter bed traps dis... Read More about Towards a Mechanistic Understanding of Carbon Stabilization in Manganese Oxides.