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Affinity and Selectivity of Immobilized N-Methyl-<scp>d</scp>-glucamine for Mercury(II) Ions
- Source :
- Industrial & Engineering Chemistry Research. 44:7490-7495
- Publication Year :
- 2005
- Publisher :
- American Chemical Society (ACS), 2005.
-
Abstract
- N-Methyl-d-glucamine (NMDG) immobilized onto cross-linked poly(vinylbenzyl chloride) beads is found to have a high affinity and selectivity for Hg(II) from nitric and hydrochloric acid solutions. In HNO3, complexation is >98% from a solution at pH 3, which decreases to 11.2% from 1 M HNO3. Hg(II) is complexed to a greater extent from HCl: 95.4% is complexed from 1 M HCl and >99.5% from solutions at pH 1.0 and greater. Control studies with immobilized sorbitol show that coordination of Hg(II) by the -OH groups is an important component of the mechanism. Complexation by sorbitol is dependent on the pH. Log−log plots of the distribution coefficients versus the hydrogen ion concentration at equilibrium show the importance of the changing nature of the solution species: since ion exchange is not mechanistically possible with sorbitol, the pH dependency reflects the effect of pH on shifting the species in solution from noncoordinating Hg(NO3)42- and HgCl42- to coordinating Hg(NO3)+ and HgCl2. Comparison to re...
- Subjects :
- Ion exchange
General Chemical Engineering
Inorganic chemistry
chemistry.chemical_element
Hydrochloric acid
General Chemistry
Chloride
Industrial and Manufacturing Engineering
Ion
Mercury (element)
chemistry.chemical_compound
chemistry
medicine
Sorbitol
N methyl d glucamine
Selectivity
medicine.drug
Subjects
Details
- ISSN :
- 15205045 and 08885885
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Industrial & Engineering Chemistry Research
- Accession number :
- edsair.doi...........45a997a44d669bc96f655fb1e715eb22