Buried-channel active waveguide array on Er,Yb:phosphate glass by field-assisted ion-exchange technique

2002 ◽  
Author(s):  
G. Sorbello ◽  
S. Taccheo ◽  
M. Marangoni ◽  
R. Osellame ◽  
R. Rampuni ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Waveguide Array ◽  
Buried Channel ◽  
Active Waveguide ◽  
Exchange Technique

An ion-exchange technique for concentrating ammonia from small volumes of seawater

1981 ◽  
Vol 10 (2) ◽  
pp. 159-164 ◽  
Author(s):  
Ronald T. Riley ◽  
Michael C. Mix
Keyword(s):  
Ion Exchange ◽  
Exchange Technique

ChemInform Abstract: Catalytic Asymmetric Dihydroxylation of Olefins with New Catalysts: The First Example of Heterogenization of OsO42- by Ion-Exchange Technique.

ChemInform ◽  
2010 ◽  
Vol 33 (4) ◽  
pp. no-no
Author(s):  
Boyapati M. Choudary ◽  
Naidu S. Chowdari ◽  
Mannepalli L. Kantam ◽  
Kondapuram V. Raghavan
Keyword(s):  
Ion Exchange ◽  
Asymmetric Dihydroxylation ◽  
Catalytic Asymmetric ◽  
Exchange Technique

Fabrication of Nickel Oxide Nanocomposite Layer on a Flexible Polyimide Substrate via Ion Exchange Technique

2009 ◽  
Vol 2 (1) ◽  
pp. 111-118 ◽  
Author(s):  
Shuxiang Mu ◽  
Dezhen Wu ◽  
Yue Wang ◽  
Zhanpeng Wu ◽  
Xiaoping Yang ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Nickel Oxide ◽  
Nanocomposite Layer ◽  
Polyimide Substrate ◽  
Exchange Technique

Recovery of gallium from Bayer liquor using ion exchange technique — a case study

2006 ◽  
Vol 23 (1) ◽  
pp. 22-26
Author(s):  
K. S. Rao ◽  
G. R. Chaudhury ◽  
P. G. Krishna ◽  
S. C. Das ◽  
V. N. Misra
Keyword(s):  
Ion Exchange ◽  
Bayer Liquor ◽  
Exchange Technique

scholarly journals Assessment of labilities of metal complexes with the dynamic ion exchange technique

2019 ◽  
Vol 16 (3) ◽  
pp. 151
Author(s):  
Federico Quattrini ◽  
Josep Galceran ◽  
Carlos Rey-Castro ◽  
Jaume Puy ◽  
Claude Fortin
Keyword(s):  
Ion Exchange ◽  
Natural Waters ◽  
Breakthrough Curves ◽  
Short Exposure ◽  
Metal Bioavailability ◽  
Operation Conditions ◽  
The Impact ◽  
Free Metal ◽  
Metal Ligand ◽  
Exchange Technique

Environmental contextIn natural waters, the impact of metals on biota is modulated by their binding with ligands. Ion-exchange techniques can provide information about metal-ligand complexes in solution, which can be linked to metal bioavailability in natural waters. We investigate modelling approaches to interpreting data from ion-exchange experiments to help elucidate the contribution of a particular complex to the overall metal uptake. AbstractThe dynamic ion exchange technique (DIET) is proposed to provide speciation information, which can be used to establish links with metal bioavailability in natural waters. The experimental setup consists of a few milligrams of a sulfonic acid type ion exchange resin packed in a plastic microcolumn that is coupled to a peristaltic pump for a sample to interact with the resin which is subsequently eluted. The evolution of both the accumulated number of moles in the resin and the concentration of the effluent can provide information on the dissociation of different metal-ligand complexes when compared with the transport properties. This information can be converted into the lability degree of a given complex or the DIET concentration cDIET, which accounts for the labile fraction contributing to the metal accumulation by the resin column at the operation conditions. cDIET can be extended to columns containing chelating resins (such as those with Chelex) or to chromatography. A comprehensive modelling of the involved phenomena (such as diffusion, advection, reaction kinetics and electrostatic partitioning) leads to the quantitative interpretation of the accumulation time series (accumulation curves) or effluent evolution (breakthrough curves). Particularly simple analytical expressions can be used for short exposure times, when a (quasi) steady-state is attained. These models have been checked against the results from complexes of Cu and Ni with ligands, such as ethylenediamine, and ethylenediaminetetraacetic, iminodiacetic, glutamic, salicylic, malonic and malic acids, which yield complexes with contrasting charges. Caution is advised when estimating the free metal fraction from DIET measurements, as cDIET and the free metal concentration can be considered to be equal only in the case of extremely inert complexes.

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