Articles with "iron oxides" as a keyword



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The Association of Heavy Metals with Iron Oxides in the Aggregates of Naturally Enriched Soil

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Published in 2019 at "Bulletin of Environmental Contamination and Toxicology"

DOI: 10.1007/s00128-019-02739-2

Abstract: Soils in three horizons from a naturally heavy metals enriched region were distributed into six size aggregates (> 2, 2–1, 1–0.6, 0.6–0.25, 0.25–0.053,  parent material (C), and contamination with Cd and Pb were primarily restricted to topsoil.… read more here.

Keywords: association heavy; oxides aggregates; iron oxides; heavy metals ... See more keywords
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Iron oxides alter methanogenic pathways of acetate in production water of high-temperature petroleum reservoir

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Published in 2017 at "Applied Microbiology and Biotechnology"

DOI: 10.1007/s00253-017-8422-2

Abstract: Acetate is a key intermediate in anaerobic crude oil biodegradation and also a precursor for methanogenesis in petroleum reservoirs. The impact of iron oxides, viz. β-FeOOH (akaganéite) and magnetite (Fe3O4), on the methanogenic acetate metabolism… read more here.

Keywords: production; acetate; akagan ite; iron oxides ... See more keywords
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Synthesis, characterization and catalytic behavior of MFe2O4 (M = Ni, Zn and Co) nanoparticles on the thermal decomposition of TKX-50

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Published in 2019 at "Journal of Thermal Analysis and Calorimetry"

DOI: 10.1007/s10973-019-09102-x

Abstract: Bimetallic iron oxides (NiFe2O4, ZnFe2O4 and CoFe2O4) were prepared via the facile solvothermal method and characterized using SEM, TEM, XRD, FTIR, XPS and BET instruments. The catalytic behavior of the bimetallic iron oxides on the… read more here.

Keywords: bimetallic iron; tkx; iron oxides; thermal decomposition ... See more keywords
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Spatial variability of iron oxides in soils from Brazilian sandstone and basalt

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Published in 2020 at "Catena"

DOI: 10.1016/j.catena.2019.104258

Abstract: Abstract Iron oxides as goethite (Gt) and hematite (Hm) are key minerals to better understand the soil–landscape relationships. Soil samples were collected at three stages of landscape dissection from the geological formations of Vale do… read more here.

Keywords: iron oxides; landscape; spatial variability; variability ... See more keywords
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Synergistic effects of the combination of oxalate and ascorbate on arsenic extraction from contaminated soils.

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Published in 2017 at "Chemosphere"

DOI: 10.1016/j.chemosphere.2016.11.155

Abstract: Arsenic is often associated with iron oxides in soils due to its high affinity with iron oxides and the abundance of iron oxides in the environment. Dissolution of iron oxides can subsequently release arsenic associated… read more here.

Keywords: iron; oxalate ascorbate; iron oxides; arsenic extraction ... See more keywords
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Evaluation of ferrolysis in arsenate adsorption on the paddy soil derived from an Oxisol.

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Published in 2017 at "Chemosphere"

DOI: 10.1016/j.chemosphere.2017.03.115

Abstract: Iron oxides are dominant effective adsorbents for arsenate in iron oxide-rich variable charge soils. Oxisol-derived paddy soils undergo intensive ferrolysis, which results in high leaching and transformation of iron oxides. However, little information is available… read more here.

Keywords: paddy soil; adsorption; arsenate adsorption; iron oxides ... See more keywords
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Iron oxides/graphene hybrid structures - Preparation, modification, and application as fillers of polymer composites.

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Published in 2020 at "Advances in colloid and interface science"

DOI: 10.1016/j.cis.2020.102285

Abstract: The current status of knowledge regarding magnetic hybrid structures based on graphene or carbon nanotubes with various forms of iron oxides is reviewed. The paper starts with a summary of the preparation and properties of… read more here.

Keywords: iron oxide; iron oxides; hybrid structures; polymer composites ... See more keywords
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Cadmium and arsenic availability in soil under submerged incubation: The influence of humic substances on iron speciation.

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Published in 2021 at "Ecotoxicology and environmental safety"

DOI: 10.1016/j.ecoenv.2021.112773

Abstract: Humic substances (HSs), as electron shuttles, are associated with iron oxide transformation, yet the manner by which HSs affect Cd/As availabilities during this process under anaerobic conditions remains unclear. Two HSs (humic sodium, HA-Na, and… read more here.

Keywords: incubation; iron oxides; humic substances; submerged incubation ... See more keywords
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Efficient elimination of uranium by carboxymethyl-β-cyclodextrin nanoparticles decorated iron oxides: Water chemistry influences and mechanism researches

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Published in 2020 at "International Journal of Hydrogen Energy"

DOI: 10.1016/j.ijhydene.2020.09.238

Abstract: Abstract Environmental radionuclides’ contaminations have attracted widespread concerns owing to their austere hazardousness in physicochemical and accumulative bio-toxicities. Herein, magnetic carboxymethyl-β-cyclodextrin coated iron oxides nanoparticles (CM-CD-MNPs) were successfully fabricated using the chemical co-precipitation approach. The… read more here.

Keywords: chemistry; iron oxides; onto mnps; carboxymethyl cyclodextrin ... See more keywords
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Interconnected porous N-doped carbon coated cobalt/iron oxides core shell nanocomposites for superior lithium storage anode

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Published in 2020 at "Journal of Alloys and Compounds"

DOI: 10.1016/j.jallcom.2020.158044

Abstract: Abstract The design and fabrication of transition metal oxides (TMOs) anode with superior lithium storage performance remains a challenge. Herein, we demonstrate one-pot hydrothermal method combined with post-calcination for the construction of interconnected porous N-doped… read more here.

Keywords: cobalt iron; superior lithium; iron oxides;
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Crystal phase effect of iron oxides on the aerobic oxidative coupling of alcohols and amines under mild conditions: A combined experimental and theoretical study

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Published in 2019 at "Journal of Catalysis"

DOI: 10.1016/j.jcat.2019.06.018

Abstract: Abstract Selective catalytic oxidation using air as the terminal oxidant is an ecofriendly route for the synthesis of fine and commodity chemicals. However, the catalyst generally faces the challenges of the inertness of molecular oxygen,… read more here.

Keywords: iron oxides; experimental theoretical; crystal phase; phase effect ... See more keywords