Studies in batch and continuous solvent sublation. IV. Continuous countercurrent solvent sublation and bubble fractionation of hydrophobic organics from aqueous solutions

Journal Article · Mon Dec 31 23:00:00 EST 1990 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399108050508· OSTI ID:5483336

Lu, Xiao Y; Valsaraj, K T; Thibodeaux, L J ^[1]

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1. Louisiana State Univ., Baton Rouge (USA)

Experimental results on the solvent sublation of four hydrophobic compounds (pentachlorophenol (PCP), 1,2,4-trichlorobenzene (TCB), 2,3,6-trichloroanisole (TCA), and 2,4,6-trichlorophenol (TCP)) from the aqueous phase to organic solvents are reported. The experiments were conducted with the aqueous and air phases in continuous countercurrent modes and the organic solvent as a stagnant layer, TCB, TCA, and TCP were sublated into mineral oil. PCP at pH 2.9 as neutral molecules were sublated into mineral oil and decyl alcohol while ionic PCP at pH 8.9 were sublated as a complex with hexadecyltrimethyl ammonium bromide into decyl alcohol. The effect of the two organic solvents were compared for neutral PCP sublation from the aqueous phase. The effects of air flow rates, influent feed rates, and the volume of organic solvent were studied. Comparisons were made between the bubble fractionation and solvent sublation of neutral PCP and TCP into mineral oil. The efficiency of sublation was largest for TCB, smallest for TCP, and followed the relative magnitudes of effective partition constants for the solutes between the air bubble and aqueous phase.

• OSTI ID: 5483336
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 26:7; ISSN 0149-6395; ISSN SSTED
• Country of Publication: United States
• Language: English

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540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ADSORPTION
AIR FLOW
ALCOHOLS
AQUEOUS SOLUTIONS
AROMATICS
BUBBLES
CHLORINATED AROMATIC HYDROCARBONS
COMPARATIVE EVALUATIONS
COUNTER CURRENT
DATA
DIAGRAMS
DISPERSIONS
EFFICIENCY
EVALUATION
EXPERIMENTAL DATA
EXTRACTION
FLOW RATE
FLOWSHEETS
FLUID FLOW
FRACTIONATION
GAS FLOW
HALOGENATED AROMATIC HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INTERFACES
LIQUID WASTES
LOADING RATE
MINERAL OILS
MIXTURES
MOLECULAR WEIGHT
NUMERICAL DATA
OILS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
SOLUBILITY
SOLUTIONS
SOLVENT EXTRACTION
SOLVENTS
SORPTION
THERMODYNAMIC PROPERTIES
VAPOR PRESSURE
VOLUME
WASTE WATER
WASTES
WATER
WATER TREATMENT