نتایج جستجو برای: extractant

تعداد نتایج: 753  

2017
J. M. GARFORTH E. H. BAILEY A. M. TYE

Chemical extractants used to measure labile soil metal must ideally select for and solubilise the labile fraction, with minimal solubilisation of non-labile metal. We assessed four extractants (0.43 M HNO3, 0.43 M CH3COOH, 0.05 M Na2H2EDTA and 1 M CaCl2) against these requirements. For soils contaminated by contrasting sources, we compared isotopically exchangeable Ni, Cu, Zn, Cd and Pb (EValue...

Journal: :analytical and bioanalytical chemistry research 2015
hossein soltani mohammad reza yaftian abbasali zamani massomeh ghorbanloo

a new carboxylic acid extractant, named 2-(dibutylcarbamoyl)benzoic acid, is prepared and its potential for selective solvent extraction and recovery of lead ions from industrial samples was investigated. the slope analysis indicated that the lead ions are extracted by formation of 1:2 metal to ligand complexes. the effect of the parameters influencing the extraction efficiency including kind o...

Journal: :journal of sciences islamic republic of iran 0

a liquid membrane containing diethylene glycol monobutyl ether (2) shows specificity for k ion in transport while diethylene glycol dibutyl ether (1) was selective for na over k . as an extractant, ligand 2 exhibited pronounced extraction selectivity for k over na in comparison with ligand 1

Journal: :Soft matter 2017
Magali Duvail Steven van Damme Philippe Guilbaud Yushu Chen Thomas Zemb Jean-François Dufrêche

The bending rigidity of small reverse aggregates involved in liquid-liquid extraction processes has been investigated by molecular dynamics simulations. Simulations of a common extractant (DMDOHEMA) with four hydrophobic chains in explicit solvent (n-heptane) and in vacuum have been performed to determine the effect of solvent penetration on film stiffness. Elastic film bending energy that is n...

2009
V Tharanitharan K Srinivasan

The removal of Pb(II) from aqueous solutions by using modified Amberlite XAD-7HP resin has been studied. The resins have been prepared by complete mixing of Amberlite XAD-7HP resin with anionic surfactant-dioctyl sodium sulphosuccinate (DOSSS) and EDTA-disodium salt (Chelating agent) in an aqueous solution. SEM studies revealed the morphological observations of the unloaded adsorbent and thereb...

Journal: :Analytical and bioanalytical chemistry 2013
Guillermo Lasarte-Aragonés Rafael Lucena Soledad Cárdenas Miguel Valcárcel

Extraction techniques are surface-dependent processes since their kinetic directly depends on the contact area between the sample and the extractant phase. The dispersion of the extractant (liquid or solid) increases this area improving the extraction efficiency. In this article, the dispersion of a nanostructured sorbent at the very low milligram level is achieved by effervescence thanks to th...

Journal: :Anais da Academia Brasileira de Ciencias 2010
Adônis Moreira César de Castro Nand K Fageria

In the Amazon region, there is no information on the fertilization of banana plants with boron (B). Besides this, the extractant (hot water) currently used to test B concentrations has many limitations. The aim of this work was to study the effect of B on the fruit yield and quality of banana plants of the Cavendish (AAA) sub-group, grown in dystrophic Yellow Latosol (Oxisol or Xanthic Ferralso...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2004
Taicheng Duan Hongfei Li JianZhen Kang Hangting Chen

In this work, the feasibility of employing Cyanex 923 as an extractant into the non-cerium REE (rare earth elements) impurity analysis of high-purity cerium oxide was investigated. Through investigations on the choice of the extraction medium, the optimium extraction acidity, matrix Ce4+ effect on the non-cerium REE ion extraction, the optimium extractant concentration and suitable extracting t...

2010
Caroline Bauer Pierre Bauduin Olivier Diat Thomas Zemb

In the present work specific adsorption phenomena of metal ions at the water –oil interface are studied. Bicontinuous microemulsions were chosen as a model system because of their high specific surface between water and oil phases. Mixing an extremely hydrophobic extractant considered here as the co-surfactant with an extremely hydrophilic sugar surfactant we succeed to formulate microemulsion ...

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