Results 81 to 90 of about 374,588 (287)

USE OF CARBON CATALYSTS FOR OXIDATIVE DESTRUCTION OF WASTEWATERS [PDF]

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2007
The paper considers a possibility of using the catalytic action of the carbonaceous adsorbents modified by different ways for the purification of various solutions, natural and wastewaters.
Svetlana S. Stavitskaya   +1 more
doaj  

Fate of the organophosphate herbicide glyphosate in arable soils and its relationship to soil phosphorus status [PDF]

open access: yes, 2009
Glyphosate is one of the world's most widely used herbicides. This study was undertaken to unravel the factors affecting its movement, sorption, persistence and leachability in different Finnish soils to create a sound basis for risk assessment. Field
Laitinen, Pirkko
core  

Global Strong Solutions for a Class of Heterogeneous Catalysis Models

open access: yes, 2016
We consider a mathematical model for heterogeneous catalysis in a finite three-dimensional pore of cylinder-like geometry, with the lateral walls acting as a catalytic surface.
Adams   +32 more
core   +1 more source

Biowęgiel z pofermentacyjnej pozostałości kukurydzy hybrydowej - tani i wydajny sorbent metali ciężkich [PDF]

open access: yes, 2019
Biochar produced from fermentation residue of maize hybrid was used in untreated form as a sorbent for the removal of Cd(II), Pb(II) and Zn(II) from aqueous solution.
Motyka, Oldřich   +3 more
core   +1 more source

Covalent Organic Frameworks for Water Sorption: The Importance of Framework Physical Stability

open access: yesAdvanced Functional Materials, EarlyView.
This study explores the water‐vapor stability of 2D covalent organic frameworks (COFs) with varying pore sizes. Results reveal microporous COFs demonstrate superior stability compared to mesoporous ones, despite lower water uptake. Mesoporous keto‐enamine‐linked COFs show enhanced stability due to intralayer hydrogen bonds, confirmed by simulations and
Wei Zhao   +13 more
wiley   +1 more source

Mechanochemical-Activated Organomontmorillonite for Uranium Pollution Protection

open access: yesAppliedChem
The modification of the layered silicate with a structural type 2:1 montmorillonite by the cationic surfactant hexadecyltrimethylammonium bromide was carried out.
Iryna Kovalchuk   +4 more
doaj   +1 more source

Valorization of keratin biofibers for removing heavy metals from aqueous solutions [PDF]

open access: yes, 2018
Four common waste keratin biofibers (human hair, dog hair, chicken feathers, and degreased wool) have been used as biosorbents for the removal of heavy metal ions from aqueous solutions. Different parameters of the biosorption processes were optimized in
Carrillo Navarrete, Fernando   +3 more
core   +2 more sources

GeAl2‐2xFe2xO3(OH)4 Nanotubes: New Electrocatalyst for Oxygen Evolution Reaction

open access: yesAdvanced Functional Materials, EarlyView.
Fe‐doped imogolite nanotubes are synthesized via a one‐step hydrothermal method with varying Fe substitution ratios x. Structural and spectroscopic analyses confirm homogeneous Fe incorporation while preserving tubular shape. Optimal doping at x = 0.05 enhances optical absorption, narrows band gap, reduces charge transfer resistance, and significantly ...
Yassine Naciri   +12 more
wiley   +1 more source

Removal of cesium and strontium ions from aqueous solutions using metakaolin based geopolymers

open access: yesХімія, фізика та технологія поверхні
The aim of presented work was to synthesize geopolymers based on the metakaolin and to determine their adsorption capability in the process of cesium and strontium ions removal from the aqueous solutions.
D. V. Tarnovsky   +3 more
doaj   +1 more source

Study of the Acid Site Structure on the WO/ZrO Surface

open access: yesAdsorption Science & Technology, 2005
The IR and UV—vis diffuse reflectance spectra of mesoporous WO 3 /ZrO 2 are discussed and a scheme proposed for the acid site structure on the WO 3 /ZrO 2 surface.
V.V. Brei   +4 more
doaj   +1 more source

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