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Fluorescence-based evidence for adsorptive binding of pyrene to effluent dissolved organic matter
Year:
2006
Source of publication :
Chemosphere
Authors :
Borisover, Mikhail
;
.
Bukhanovsky, Nadezhda
;
.
Laor, Yael
;
.
Saadi, Ibrahim
;
.
Volume :
65
Co-Authors:
Facilitators :
From page:
1925
To page:
1934
(
Total pages:
10
)
Abstract:
Using fluorescence intensity measurements, pyrene interactions with different types of effluent dissolved organic matter (EDOM) originated from treated municipal wastewater are examined. Multiple observations show that fluorescence intensity of pyrene-EDOM solutions is non-linearly related to pyrene concentration, with distinct concave-up dependence. Testing the effect of pyrene concentration on fluorescence intensity of pyrene-EDOM solutions provides a tool to examine whether binding of an organic compound to EDOM follows linear or non-linear isotherm. Possible coupling between static and dynamic quenching effects was addressed while analyzing fluorescence data. Limited number of EDOM binding sites results in a non-linear binding isotherm such that the concept of pyrene "partitioning" between aqueous phase and "bulky" EDOM organic phase is hardly relevant. Maximal EDOM capacity for pyrene binding is estimated approximately as 0.1% w w-1. Examination of the differences between the total fluorescence intensity of pyrene-EDOM solution and the fluorescence intensities of separated constituents (pyrene and EDOM) was used to illustrate the accumulation of pyrene-EDOM complexes and saturation of some EDOM binding sites. Strong interactions between pyrene and EDOM binding sites may result in pyrene distribution coefficients differing at least by a factor 3.5-7 at varying pyrene concentrations. © 2006 Elsevier Ltd. All rights reserved.
Note:
Related Files :
Adsorption
chemical binding
dissolved organic matter
Non-linear isotherm
pyrene
Quenching
Wastewater
Show More
Related Content
More details
DOI :
10.1016/j.chemosphere.2006.07.032
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21109
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:41
Scientific Publication
Fluorescence-based evidence for adsorptive binding of pyrene to effluent dissolved organic matter
65
Fluorescence-based evidence for adsorptive binding of pyrene to effluent dissolved organic matter
Using fluorescence intensity measurements, pyrene interactions with different types of effluent dissolved organic matter (EDOM) originated from treated municipal wastewater are examined. Multiple observations show that fluorescence intensity of pyrene-EDOM solutions is non-linearly related to pyrene concentration, with distinct concave-up dependence. Testing the effect of pyrene concentration on fluorescence intensity of pyrene-EDOM solutions provides a tool to examine whether binding of an organic compound to EDOM follows linear or non-linear isotherm. Possible coupling between static and dynamic quenching effects was addressed while analyzing fluorescence data. Limited number of EDOM binding sites results in a non-linear binding isotherm such that the concept of pyrene "partitioning" between aqueous phase and "bulky" EDOM organic phase is hardly relevant. Maximal EDOM capacity for pyrene binding is estimated approximately as 0.1% w w-1. Examination of the differences between the total fluorescence intensity of pyrene-EDOM solution and the fluorescence intensities of separated constituents (pyrene and EDOM) was used to illustrate the accumulation of pyrene-EDOM complexes and saturation of some EDOM binding sites. Strong interactions between pyrene and EDOM binding sites may result in pyrene distribution coefficients differing at least by a factor 3.5-7 at varying pyrene concentrations. © 2006 Elsevier Ltd. All rights reserved.
Scientific Publication
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