Removal of trace levels of aromatic amines from aqueous solution by foam flotation

Conference · Sun Apr 01 04:00:00 EDT 1990 · Journal of the Tennessee Academy of Science; (USA)

OSTI ID:5478704

Nyssen, G A; White, J S ^[1]; Bibring, P; Wilson, D J ^[2]

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1. Trevecca Nazarene College, Nashville, TN (USA)
2. Vanderbilt Univ., Nashville, TN (USA)

Aromatic amines, including 4-(t-butyl)pyridine, 4-(n-butyl)-aniline, benzylamine, 4-aminobiphenyl, 1- and 2-aminonaphthalene, and 2,6-xylidine were effectively removed from water by foam flotation with the anionic surfactant sodium dodecylsulfate (SDS). With initial amine concentrations of 10 mg/L or less, residual amine concentrations of less than 0.1 mg/L were generally obtained after 10-30 min of flotation. The SDS concentration and flotation time are directly related to the amount of amine removed. Amine removal is most efficient at pH values low enough so that the amine is protonated (usually about 3), and at low ionic strength. Alcohols up to 10% by volume do not appreciably affect amine removal. The mechanism of removal is dominated by ion-ion attraction between the surfactant and the protonated amine; there is also apparently some contribution from ion-dipole attraction. Benzidine is not removed effectively; evidently it is insufficiently hydrophobic.

• OSTI ID: 5478704
• Report Number(s): CONF-8911221--
• Conference Information: Journal Name: Journal of the Tennessee Academy of Science; (USA) Journal Volume: 65:2
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540310* -- Environment
Aquatic-- Basic Studies-- (1990-)
AMINES
AROMATICS
FOAM SEPARATION
HYDROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
POLYCYCLIC AROMATIC AMINES
SEPARATION PROCESSES
SURFACTANTS
WATER