1-chloro-4-nitrobenzene

Adsorption / desorption

Administrative data

Endpoint:

adsorption / desorption

Remarks:

adsorption/desorption

Type of information:

experimental study

Adequacy of study:

other information

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: acceptable, well documented publication which meets basic scientific principles

Data source

Reference

Reference Type:

publication

Title:

Adsorption of Substituted Nitrobenzenes and Nitrophenols to Mineral Surfaces.

Author:

Haderleln S.B. and Schwarzenbach R.P.

Year:

1993

Bibliographic source:

Environ. Sci. Technol., Vol. 27, No. 2, pp. 316-326

Materials and methods

Principles of method if other than guideline:

The adsorption of a large number of nitroaromatic compounds (NACs) (e.g. 4-chloronitrobenzene) to mineral surfaces, particularly to homoionic kaolinites, has been investigated.

GLP compliance:

no

Type of method:

HPLC estimation method

Media:

other: mineral surfaces, particulary to homoionic kaolinites

Test material

Test material information

Constituent 1

Reference substance name:

1-chloro-4-nitrobenzene

EC Number:

202-809-6

EC Name:

1-chloro-4-nitrobenzene

Cas Number:

100-00-5

Molecular formula:

C6H4ClNO2

IUPAC Name:

1-chloro-4-nitrobenzene

Results and discussion

Results: Batch equilibrium or other method

Adsorption and desorption constants:

Kd = 44 L/kg

Any other information on results incl. tables

An apparent sorption equilibrium was always attained within a few minutes. After this time no detectable concentration changes occurred; thus typical equilibration times between 30 - 60 minutes were used in all experiments. Desorption kinetics of NACs were also investigated, and it was also found that desorption equilibrium was reached within a few minutes. The results demonstrate that nitroaromatic compounds may adsorb specifically and reversible to the negatively charged siloxane surface of kaolinite. At high surface coverage the adsorption isotherms generally exhibit a saturation-type curvature approaching a maximum surface concentration of ca. 2.5 mmol of NAC/kg of kaolinite. At low surface coverage the isothermes were linear and a constant distribution coefficient Kd (L/kg), can be defined for this part of the isotherm. The Kd calculated for p-chloronitrobenzene is 44 L/kg.