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Friday, July 17, 2020 | History

2 edition of Selenium selectivity in ion exchange resins found in the catalog.

Selenium selectivity in ion exchange resins

Gerald A. Guter

Selenium selectivity in ion exchange resins

by Gerald A. Guter

  • 283 Want to read
  • 22 Currently reading

Published by San Joaquin Valley Drainage Program in Sacramento, Calif .
Written in English

    Subjects:
  • Water quality management -- California -- San Joaquin Valley.,
  • Water -- Purification -- Ion exchange process.,
  • Selenium.,
  • San Joaquin Valley Drainage Monitoring Program.,
  • Kesterson Reservoir (Calif.)

  • Edition Notes

    Other titlesReport on selenium selectivity in ion exchange resins
    Statementprepared for the San Joaquin Valley Drainage Program by Gerald A. Guter, Boyle Engineering Corporation.
    ContributionsSan Joaquin Valley Drainage Program., Boyle Engineering Corporation., United States. Bureau of Reclamation.
    The Physical Object
    Pagination19 leaves ;
    Number of Pages19
    ID Numbers
    Open LibraryOL23077436M

      There are two exceptions, however. One study (26) reported selenite in 4 of 13 urine samples at up to 95% of total selenium. The method (ion-exchange chromatography with off-line detection), however, seems rather nonselective for selenite, and the data must be questioned. The six-volume CRC Handbook of Ion Exchange Resins reviews the application of ion exchange resins to inorganic analytical chemistry. Extracted from over 6, original publications, it presents the information in over 1, tables complemented by concise descriptions of analytical methods involving virtually all the elements of the periodic table.

      Samples analyzed, experimental solutions, ion exchange resins and chemical procedures. In order to test the efficiency and reproducibility of our chemical procedures, we choose samples and terrestrial rock standards with varied chemical compositions, as well as high-purity certified CPI International Peak Performance™ standard stock by: Dissolved zinc and cadmium in some surface waters of Western Nigeria were separated and quantified using anion exchange of their chloro-complexes and detected by atomic absorption spectrophotometry. Concentrations of zinc and cadmium found in tested water samples ranged from to mg L{sup.

    Ion-exchange membranes (IEMs) are unique in combining the electrochemical properties of ion exchange resins and the permeability of a membrane. They are being used widely to treat industrial effluents, and in seawater and brackish water desalination. Membrane Capacitive Deionisation (MCDI) is an emerging, energy efficient technology for brackish water desalination in which these ion-exchange Cited by: Ion Exchange Selectivity Scales for Cations in Nitric Acid and Sulfuric Acid Media with a Sulfonated Polystyrene by:


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Selenium selectivity in ion exchange resins by Gerald A. Guter Download PDF EPUB FB2

Full text of "Selenium selectivity in ion exchange resins" See other formats SJVDP LIBRARY. Report on SELENIUM SELECTIVITY IN ION EXCHANGE RESINS Prepared for the SAN JOAQUIN VALLEY DRAINAGE PROGRAM Under contract with the U.S.

BUREAU OF RECLAMATION FEBRUARY Ml bovle En&ms&RiriG ccRPORfrrion This report presents the results of a study conducted for the. SELECTIVE COLLECTION OF SELENIUM (IV)FROM ENVIRONMENTAL WATER BY FUNCTIONALIZED ION-EXCHANGE RESIN H.

TANAKA Faculty of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, K y o t oJapan M. NAKAYAMA Department of Industrial Chemistry, Kumarnoto University, Kurokami. KumamotoJapan by: 7. The selectivity sequence from most preferred to least preferred at the eluent pH of is as follows: The most-preferred-ion status of selenate is significant in consideration of an ion-exchange process to remove trace amounts of selenium from groundwater containing much larger concentrations of sulfate.

Rohm and Haas Ion Exchange Ion exchange introduction 1 FD Sep ION EXCHANGE FOR DUMMIES An introduction Water Water is a liquid. Water is made of water molecules (formula H2O).

All natural waters contain some foreign substances, usually in small amounts. The ion exchange mechanisms by which these materials sorb these ions are also explained and modelled in order to highlight the additional benefits that these materials offer that non ion-exchange materials do not, such as the ability to achieve the full material exchange capacities at feed concentrations lower than 1 mg l –1 selenium.

The. Ion exchange separation of uranyl ion (UO2+2) from metal cations has been carried out by the columnar operation using ion exchange resins in mol/dm3 sulfuric acid medium. Growing awareness of selenium bioaccumulation has resulted in selenium management becoming an important environmental issue for mining operations.

Selen-IX™ is a novel ion exchange based technology developed by BioteQ to provide an effective solution for removing selenium oxyanions from mine impacted water to single-digit µg/L levels. Due to this fact, such chelating ion exchange resins can combine ion exchange and complexing reactions and then exhibit high selectivity for metal ions.

Dowex M possessing such functional groups is commercially available. It was synthesized in the early s by Dow Chemical Co. and formerly known as Dowex XFS or DOW by: The ion- exchange behavior of selenate was identical to that of sulfate; the behavior of selenite was found to be similar to that of nitrate.

The local-equilibrium theory for ion-exchange columns pro- duced good results in predicting selenium-removal capacities. Two alternative methods of. Some purification needs require more specific removal solutions than conventional deionization can offer. SAMCO has a wide range of specialty ion exchange resins that can be specifically treated to meet your needs, including specialty chelating resins for highly selective process-stream purification.

Whether you are looking to remove unwanted colors or taste from your beverages, metals from. To remove a particular ion in the presence of other, we need to synthesize new cation-exchangers, having affinity and selectivity for a particular metal ion (Nabi, Mu, and Inamuddin ;Nabi.

exchange layer functionalized with quaternary ammonium groups attached to the surface of a core consisting of ethylvinylbenzene cross-linked with divinylbenzene. REAGENTS AND MATERIALS. All chemicals to be used must be of reagent-grade purity. Deionized (DI) water can be produced using Millipore deionizing cartridges or absorber and ion-exchangeAuthor: Sabine Goldberg, Bruce A.

Manning. Great Lakes Res. 4, clay, erosion, resuspension Bernier, W. and G. Janauer /I In situ reduction of ion exchange resins as a method for preconcentration of selenium and other heavy metals from aqueous solutions Trace subst.

Environ. Hea to elements: Se, As, Sb, Hi Bernotas, V. and I. Grachev /I Selectivity in an ion exchange resin need not be determined by the nature of the active group alone. There may be a substantial contribution from the matrix with an observed increase in the separation factor between platinum chloro-complexes and the Cl − ion by a factor of up to Matrix effects are dealt with for resins containing the isothiouronium group in one case and the pyridyl Cited by: you should know periodic table, Selenium on 6A grup.

So, to make selenium to be a stable molecule, it should need to accept 2 electrons. SO, the number of Ion is because to far or difficult to donate 6. But it can be happened, Se would have nu. Ion exchangers exchange one ion for another, hold it temporarily, and then release it to a regenerant solution.

In an ion exchange system, undesirable ions in the water supply are replaced with more acceptable ions. For example, in a sodium zeolite softener, scale-forming calcium and magnesium ions are replaced with sodium ions. Selenium has six stable isotopes, 74 Se (% natural abundance), 76 Se (%), 77 Se (%), 78 Se (%), 80 Se (%), and 82 Se (%), and many radioisotopes, of which 75 Se (gamma emitter; half-life, days) is most commonly used as a tracer in biological studies.

The isotopes of selenium have been very helpful in experimental studies as well as in the analysis of selenium and Cited by: 3 into mL of ion exchange water; a mg L21 stock solution of Se(VI) was made by dissolving g of Na 2 SeO 4 into mL of ion exchange water.

Stan-dards were prepared each day just before analysis. The stan-dards ranged from 5 to 30 mgL21 and were either single ion standards of Se(IV) or Se(VI) or mixed ion standardsCited by: The clarified solution free of selenium is recycled back to the ion exchange circuit for re-use in resin regeneration.

More than 99% of the selenium in the eluate is removed during this process. RESULTS AND DISCUSSION Selen-IX™ has been piloted with different mining companies on.

The suprising feature of this resin, and the process of this invention is its selectivity for selenium, and its deselectivity for sulfate anions which prohibit the use of other known anion exchange resins without first having to remove sulfur compounds from the waste water prior to ion-exchange.

An accurate procedure for the elimination of iron interferences in the determination of selenium in geological materials by the Hydride Generation – Inductively Coupled Plasma Atomic Emission Spectrometry technique (HG-ICPAES) is proposed.

A selective removal of iron is achieved by on-line incorporation of a microcolumn filled with strongly acidic cation exchange resin (Dowex 50W-X8).Cited by: @article{osti_, title = {Anoxic biotreatment cell (ABC) for removal of nitrate and selenium from mining effluent waters}, author = {Reinsel, M A and Botz, M K}, abstractNote = {Removal of nitrate from mining and other industrial and municipal effluents is often required to meet water discharge limits, and state and federal nondegradation standards for surface water and groundwater.Boyle Engineering Corporation (ed) () Report on selenium selectivity in ion exchange resins.

Rep San Joaquin Valley Drainage Program, US Dep Interior, Sacramento Google Scholar California Department of Water Resources (ed) () Los Banos demonstration desalting facilities, status Cited by: 2.