New selective anion-exchange resins for nitrate removal from contaminated drinking water and studies on analytical anion-exchange chromatography

Technical Report · Mon Jan 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/6949580· OSTI ID:6949580

Lockridge, J E

New anion exchange resins, with superior selectivity for nitrate, have been developed. The resins are based on the covalent attachment of a quaternary phosphonium group to a polystyrene-divinylbenzene copolymer. Phosphonium resins of composition resin-R{sub 3}P{sup +}A{sup {minus}} where R is varied from methyl to pentyl were evaluated for nitrate/sulfate selectivity, capacity and nitrate decontamination of drinking water. A similar series for the quaternary ammonium exchangers was also evaluated. A mixed bed process, where nitrate removal and water softening is accomplished in a single column, was also evaluated. A small piece of silver wire, coated with an insoluble silver salt, works well as a selective potentiometric detector for halide ions in ion chromatography. Several coated electrodes were examined by electron microscopy and their response to various anions evaluated by flow injection analysis. Two methods for the determination of aluminum by anion chromatography are presented. In the first method, a standard excess of fluoride ion is added to the sample. In a second method, aluminum(III) is determined directly by anion chromatography when sodium phthalate is used as an eluent. 63 refs., 30 figs.

• Research Organization: Ames Lab., Ames, IA (United States)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6949580
• Report Number(s): IS-T-1395; ON: DE90011620
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM
ION EXCHANGE CHROMATOGRAPHY
DRINKING WATER
DECONTAMINATION
HALIDES
DETECTION
ION EXCHANGE MATERIALS
EVALUATION
NITRATES
REMOVAL
AMINES
ELECTRODES
PHOSPHINES
POTENTIOMETERS
RESINS
CHROMATOGRAPHY
CLEANING
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
MATERIALS
MEASURING INSTRUMENTS
METALS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOSPHORUS COMPOUNDS
POLYMERS
SEPARATION PROCESSES
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
400102 - Chemical & Spectral Procedures