Results 91 to 100 of about 164,938 (266)

Silicate chemical weathering disrupts the global patterns of phosphorus limitation.zip.

, 2023
Global change is accelerating the chemical weathering of silicate rocks and the associated release of elemental phosphorus. However, the effects of phosphorus release on the global patterns of the phosphorus limitation of vegetation growth are unclear ...
Li (17112307)
core   +1 more source

Hydrogen‐Based Reduction of Hematitic Iron Ore in a Fluidized Bed Kinetic Reactor at Elevated Pressures

steel research international, EarlyView.
This study investigates the reduction behavior of two international iron ores, including a synthetic hematite produced by oxidation of magnetite, in a novel fluidized‐bed kinetic reactor at elevated pressures. The reduction takes place at various temperatures (650°C, 700°C, and 750°C), and various hydrogen partial pressures (30, 55, and 80 vol% H2 ...
Valentina Nigitz, Aaron Wieder, Sandra Jezernik, Christoph Ahr, Mark Berchtold, Franz Winter   +5 more
wiley   +1 more source

Geochemical Evidence for Weathering in Northwestern European Loess on a Sub-millenial Scale During the Last Ice Age [PDF]

This study seeks to determine the extent to which chemostratigraphy can supplement other stratigraphic tools in determining the effects of climate change in loess-palaeosol sequences.
Hill, Terence Charles
core   +3 more sources

Silicate weathering feedback hindered by clay formation

, 2023
The chemical weathering of silicate rocks plays a central role in stabilizing our climate through CO2 drawdown. Li isotopic evidence from a prolonged Eocene warming event suggests clay formation may disrupt this feedback on intermediate ...
Henehan, Michael J., Michael J. Henehan
core   +1 more source

Influence of natural fibers on physical, mechanical, and fire‐resistant properties of microconcrete

Structural Concrete, EarlyView.
Abstract This study examined the influence of natural fibers on the physical, mechanical, and fire‐resistant properties of microconcrete, in comparison with conventional polypropylene fibers used in cement composites. The fibers were characterized by FTIR and TGA/DSC to assess their composition and thermal stability, and FTIR was also performed after ...
Ivanka Netinger Grubeša, Sandra Juradin, Silvija Mrakovčić, Lidija Radovanović, Milica Vasić, Huseyin Bilgin   +5 more
wiley   +1 more source

Cold‐curing effects on the strength development and sulfuric acid resistance of basalt fiber‐reinforced hybrid alkali‐activated slag mortars

Structural Concrete, EarlyView.
Abstract Cold weather conditions impose substantial constraints upon the performance and long‐term resilience of concrete materials. Alkali‐activated slag (AAS) presents itself as a promising substitute, exhibiting sustained hydraulic activity even when exposed to ambient conditions characterized by low temperatures.
Zeynep Bahçeci, Murat Dener, Ahmet Benli, Bilal Balun   +3 more
wiley   +1 more source

Silicate weathering in the semi-arid Southern Pyrenees during the PETM: lithium isotope evidence [PDF]

Climate of the Past
The Palaeocene-Eocene Thermal Maximum (PETM), a hyperthermal event ∼ 56 Ma ago, allows the Earth system response to abrupt climate change to be explored. Recent investigations link the PETM with a negative lithium isotope (δ7Li) excursion, interpreted as
R. Jaimes-Gutierrez, M. Prieur, D. J. Wilson, P. A. E. Pogge von Strandmann, P. A. E. Pogge von Strandmann, E. Pucéat, T. Adatte, J. E. Spangenberg, S. Castelltort   +8 more
doaj   +1 more source

REE fractionation during granite weathering and removal by waters and suspended loads: Sr and Nd isotopic evidence [PDF]

, 2001
Very few studies deal with REE (rare earth element) mobility within the system soil–soil solution–streamwater. In this article, we try to characterize the fractionation and the migration of the REE in a granite-derived soil system located in a small ...
Dominique Aubert, Aubert, Dominique, Anne Probst, Stille, Peter, Probst, Anne, Peter Stille   +5 more
core   +1 more source

Mechanical, rheological, and durability performances of GGBS‐based concrete for potential application to prestressed structures

Structural Concrete, EarlyView.
Abstract Ground granulated blast‐furnace slag (GGBS) is a widely used clinker substitute in concrete, recognized for its potential to significantly reduce environmental impacts. However, its application in prestressed concrete remains limited in several countries, mainly due to concerns regarding early‐age mechanical performance and long‐term ...
D. Rolando Baldiviezo, Leonardo Todisco, Cristina Argiz, Carmen Andrade, Amparo Moragues, Jaime C. Gálvez, Hugo Corres   +6 more
wiley   +1 more source

Rock organic carbon oxidation CO₂ release offsets silicate weathering sink. [PDF]

Nature, 2023
Zondervan JR, Hilton RG, Dellinger M, Clubb FJ, Roylands T, Ogrič M.   +5 more
europepmc   +1 more source