Aromatic polyamide hydrazide membranes for reverse osmosis separations

Journal Article · · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399008050384· OSTI ID:5638536

Bindal, R C; Ramachandhran, V; Misra, B M; Ramani, M P.S. ^[1]

---

1. Bhabha Atomic Research Centre, Bombay (India)

Wholly aromatic polyamide hydrazide (PAH) polymers were synthesized by low temperature polycondensation from freshly prepared m-amino benzhydrazide, p-amino benzhydrazide, isophthaloyl chloride, and terephthaloyl chlorides in dimethyl acetamide solvent. A series of film-forming polymers prepared by altering the molar ratios of the reacting monomers was characterized in terms of % moisture regain, {eta}{sub inh}, and x-rays. Asymmetric membranes prepared from selected polymer samples were tested in reverse osmosis test cells, and the pure water permeability and the membrane constant were determined. An optimum meta:para molar ratio of the reacting monomers has been identified for the best performance under reverse osmosis which gave solute separation close to 98% for a feed concentration in the range of seawater. The PAH membranes appear to be potential barrier candidates for treatment of effluents containing ammonium, nitrates, etc. and radioisotopes. Separation data for a few other solute systems were also evaluated and compared with those obtained from cellulose acetate membranes.

• OSTI ID: 5638536
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 25:9-10; ISSN SSTED; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

052001 -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
ACETATES
ALKALI METAL COMPOUNDS
AMMONIUM CHLORIDES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
AMMONIUM NITRATES
BORATES
BORON COMPOUNDS
CARBOXYLIC ACID SALTS
CHEMICAL PREPARATION
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
DEMINERALIZATION
DESALINATION
DIFFRACTION
DIFFUSION
HALIDES
HALOGEN COMPOUNDS
HYDRAZIDES
HYDROGEN COMPOUNDS
LOW-LEVEL RADIOACTIVE WASTES
MATERIALS
MEMBRANE TRANSPORT
MEMBRANES
MOISTURE
MOLECULAR WEIGHT
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OSMOSIS
OXALATES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PERMEABILITY
POLYAMIDES
POLYMERS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SCATTERING
SEAWATER
SEPARATION PROCESSES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SYNTHESIS
TESTING
VISCOSITY
WASTES
WATER
X-RAY DIFFRACTION