Sorption coefficients of chlorinated benzenes derivates on a natural lake sediment

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:40020

Schrap, S M ^[1]; Opperhuizen, A ^[2]

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1. Univ. of Utrecht (Netherlands)
2. Ministry of Transport, Public Works and Water Management, The Hague (Netherlands). Tidal Waters Division

Sorption coefficients for a series of chlorinated benzenes, chlorinated anilines, chlorinated nitrobenzenes and a series of chlorinated methoxybenzenes have been determined for a lake sediment. Firstly the experimental period to establish equilibrium between concentrations of the chemicals in the sediment and the water was determined for each of the chemicals. Subsequently the sorption isotherms were measured over aqueous concentrations ranges of two to three orders of magnitude. Isotherms for all chemicals were linear, except the isotherms for the chlorinated nitrobenzenes. These showed a deviation of the linearity at higher concentrations. The influence of an aniline-, nitro or methoxy-group at the benzene ring on the sorption was investigated by comparison of the sorption coefficients of anilines, nitrobenzenes and methoxybenzenes with three, four or five chlorine atoms with the sorption coefficients of the corresponding tri-, tetra- and pentachlorobenzene. To be able to compare the results of the different experiments, two reference chemicals (chlorobenzenes) were added to each of the series. Relative sorption coefficients showed a decrease of the sorption by the substitution of a nitro-group to the chlorobenzene. The substitution of a aniline or methoxy-group showed a less pronounced effect.

• OSTI ID: 40020
• Report Number(s): CONF-9410273--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CHLORINATED AROMATIC HYDROCARBONS
CONTAMINATION
ECOLOGICAL CONCENTRATION
LAKES
SEDIMENTS
SORPTION
WATER CHEMISTRY
WATER POLLUTION