Results 81 to 90 of about 39,824 (274)

Goethite (α‐FeOOH) photocatalytic activity at natural concentrations by the addition of H2O2 at neutral pH and the simultaneous presence of fluoride and bicarbonate [PDF]

open access: bronze, 2023
John J. Alvear‐Daza   +9 more
openalex   +1 more source

Microalgae‐Derived Metal Nanostructures: Biosynthesis, Characterization, and Applications

open access: yesChemistryOpen, Volume 15, Issue 1, January 2026.
This review highlights the eco‐friendly biosynthesis of silver, gold, iron, and copper nanoparticles using microalgae. It details mechanisms, optimization parameters, and characterization methods, while emphasizing potent biomedical applications including antioxidant, antimicrobial, and anticancer effects.
Jaya Lakkakula   +4 more
wiley   +1 more source

Phyllosilicate-based adsorbents decorated with iron oxyhydroxides: Application for lead, chromates and selenites removal [PDF]

open access: yesScience of Sintering
Expanded vermiculite (EVer) was acid activated and silanized in order to obtain suitable substrate’s surface for decoration with iron oxyhydroxides (IO).
Bugarčić Mladen   +6 more
doaj   +1 more source

Goethite Nanorods: Synthesis and Investigation of the Size Effect on Their Orientation within a Magnetic Field by SAXS

open access: yesNanomaterials, 2020
Goethite is a naturally anisotropic, antiferromagnetic iron oxide. Following its atomic structure, crystals grow into a fine needle shape that has interesting properties in a magnetic field.
Stephan Hinrichs   +7 more
doaj   +1 more source

Is selective identification of poorly crystalline aluminum hydroxides in soils of temperate latitude possible?

open access: yesSoil Science Society of America Journal, Volume 90, Issue 1, January/February 2026.
Abstract Aluminum (Al) is one of the most abundant elements in soils. As poorly crystalline Al hydroxides are reactive toward soil organic matter (SOM), they are thought to be involved in SOM stabilization. This is also inferred from correlations between soil organic carbon contents and those of Al extracted by acid oxalate in darkness (AOD), although ...
Thilo Rennert   +2 more
wiley   +1 more source

Sustainable Solutions for Pollutants Removal with a Hybrid Multifunctional Adsorbent Based on Recycled Expanded Glass

open access: yesApplied Sciences
The removal of the As(V) and Iprodione fungicide onto EGS@APTES-GT, obtained by amino-modified expanded glass spheres (EGS) modified with goethite, was studied in this work. Material characterization was performed using SEM/EDS, XRD, and FTIR techniques.
Ali Abdussalam Almazoug   +7 more
doaj   +1 more source

Red Pigments in the Bronze Age Burials in the North Caucasus: Complex Analysis for Identification of Pyroprocessing of Iron Minerals

open access: yesВестник Волгоградского государственного университета. Серия 4. История, регионоведение, международные отношения, 2018
Ochre is a natural pigment of yellow or red color, mainly consisting of iron minerals. Along with determining the origin of mineral dyes, one of the main problems of studying natural pigments in archaeology is identifying the origin of the so-called “red”
Pavel I. Kalinin   +3 more
doaj   +1 more source

The Role of Fe(II) Minerals in Carbon Stabilization in Coastal and Estuarine Anoxic Environments

open access: yesGlobal Biogeochemical Cycles, Volume 40, Issue 1, January 2026.
Abstract Fe(III) (oxyhydr)oxides are well‐known for their role in organic carbon (OC) stabilization in terrestrial soils. Coastal and estuarine soils typically act as iron sinks and receive a high input of OC. However, tidal submersion induces anoxic and reducing conditions that favor the microbial reductive dissolution of Fe(III) (oxyhydr)oxides ...
Jan Jagode   +2 more
wiley   +1 more source

Field-scale spatial correlation between contents of iron oxides and CO2 emission in an Oxisol cultivated with sugarcane

open access: yesScientia Agricola, 2015
Soil CO2 emission (FCO2) is one of the main sources of carbon release into the atmosphere. Moreover, FCO2 is related to soil attributes governing the transfer of gases from soil to the atmosphere.
Angélica Santos Rabelo de Souza Bahia   +6 more
doaj   +1 more source

Biogeochemical asymmetry and the diversification of tropical rain forests in Borneo: The endmember hypothesis

open access: yesFunctional Ecology, Volume 40, Issue 1, Page 4-14, January 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Mixed dipterocarp lowland tropical rain forests on Oxisols and Ultisols and heath forests on Spodosols are considered distinct vegetation types in Borneo. Here we present the endmember hypothesis of ecosystem diversification, which describes a continuum of forest ...
Kanehiro Kitayama   +4 more
wiley   +1 more source

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