Results 21 to 30 of about 360,268 (308)

Exploring Strategies for Copper Removal from Nickel Anolytes: A Review

open access: yesChemEngineering, 2023
Various methods, such as electrochemical purification, chemical precipitation, solvent extraction, and ion-exchange resins, have been extensively employed for the removal of copper from nickel anolytes.
Xiaowei Tang, Kunyu Ju
doaj   +1 more source

De Novo Ion-Exchange Membranes Based on Nanofibers

open access: yesMembranes, 2021
The unique functions of nanofibers (NFs) are based on their nanoscale cross-section, high specific surface area, and high molecular orientation, and/or their confined polymer chains inside the fibers.
Shaoling Zhang   +2 more
doaj   +1 more source

Ion Exchange Technology: A Promising Approach for Anions Removal from Water [PDF]

open access: yes, 2012
Water pollution due to increased agricultural, industrial, and domestic activities has become a serious concern worldwide. Various toxic pollutants have been detected in drinking water sources at alarming levels.
Kumar, Eva   +3 more
core   +1 more source

A Scientometric analysis and bibliometric review of IOEX as a treatment to remove pollutants [PDF]

open access: yesAl-Qadisiyah Journal for Engineering Science
Pollutants in water bodies pose a serious threat to both the aquatic ecosystem and human health. Ion exchange is used as a chemical process to remove unwanted dissolved ions from water and wastewater. It is widely accepted in developing countries.
Zuhal Hamza   +2 more
doaj   +1 more source

Mathematical modelling of space charge breakdown in membrane systems taking into account the non-catalytic dissociation/ recombination reaction of water molecules [PDF]

open access: yesE3S Web of Conferences, 2020
In electromembrane systems, a theoretical study of salt ion transfer usually uses mathematical models of salt ion transfer in the depleted diffusion layer of ion-exchange membranes.
Gudza V   +3 more
doaj   +1 more source

Adsorbed ion activities and other thermodynamic parameters of ion-exchange defined by mole or equivalent fractions [PDF]

open access: yes, 1983
The ‘Gaines and Thomas’ method for calculating the thermodynamic parameters of a cation exchange process has been criticized because equivalent rather than mole fractions were used in the definition of adsorbed ion activity coefficients.
Goulding, K. W. T., K. W. T. GOULDING
core   +1 more source

Determining ion activity coefficients in ion-exchange membranes with machine learning and molecular dynamics [PDF]

open access: yes, 2023
The activity coefficients of ions in polymeric ion-exchange membranes (IEMs) dictates the equilibrium partitioning coefficient of the ions between the membrane and the liquid. It also affects ion transport processes, such as conductivity, in ion-exchange
Revati, Kumar   +5 more
core   +1 more source

The enhanced catalytic activity of Cu/SAPO-34 by ion exchange method for selective catalytic reduction of nitric oxide

open access: yesMaterials Research Express, 2021
The Cu/SAPO-34 catalysts were prepared via the ion exchange process for achieving improved catalytic activity. Effects of various parameters including copper ions sources, copper ions loadings and ion exchange temperature on catalyst performance of the ...
Dapeng Wang, Zhaokun Li, Chengwen Song
doaj   +1 more source

Charge-Exchange Collision Dynamics and Ion Engine Grid Geometry Optimization [PDF]

open access: yes, 2007
The development of a new three-dimensional model for determining the absolute energy distribution of ions at points corresponding to spacecraft surfaces to the side of an ion engine is presented.
Morris, Bradford S.
core   +1 more source

Ion-exchange Resin Catalyzed Esterification of Lactic Acid with Isopropanol: a Kinetic Study [PDF]

open access: yes, 2011
The kinetic behavior of esterification of lactic acid with isopropanol over an acidic cation exchange resin, Amberlyst 15, was studied under isothermal condition. Isopropyl lactate synthesized in this reaction is an important pharmaceutical intermediate.
Wanchoo , Ravinder Kumar   +7 more
core   +1 more source

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