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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
The effect of organic sorbates on water associated with environmentally important sorbents: Estimating and the LFER analysis
Year:
2013
Source of publication :
Adsorption
Authors :
בוריסובר, מיכאל
;
.
Volume :
19
Co-Authors:
Borisover, M., Institute of Soil, Water and Environmental Sciences, Volcani Center, POB 6, Bet Dagan 50250, Israel
Facilitators :
From page:
241
To page:
250
(
Total pages:
10
)
Abstract:
The effect of organic sorbates on the water associated with naturally occurring sorbents is of significant interest since it probes the hydration of a sorbate-specific microenvironment and its role in a compound partitioning between various environmental compartments. This effect was described in a thermodynamically strict way by converting the sorption isotherms of organic vapors on variously hydrated sorbents into the derivatives relating the change in the amount of water associated with a sorbent to the change in the amount of an organic sorbate. Further, these derivatives were analyzed by means of the Linear Free Energy Relationship (LFER). The analysis included the sorption data for various organic vapors on such environmentally important sorbents as quartz, metal oxides, calcite, clay minerals and humic acid. From the LFER analysis it followed that (i) organic sorbate polarizability contributions from n- and π-electrons resulted in driving water into the sorbent phase; (ii) the increasing volume of the organic compounds involved expelling water molecules; (iii) the increasing hydrogen-bond acidity and basicity of organic sorbates resulted in expelling water from inorganic surfaces but in enhancing hydration of the humic phase. In contrast to inorganic surfaces, when sorbed on strongly hydrated humic acid, the majority of organic sorbates containing oxygen, nitrogen or sulfur atoms drive water into the sorbent phase. Several molecules of water may need to be cosorbed by a humic sorbent for each sorbed molecule of an organic compound thus supporting the possibility of the concomitant participation of a number of water molecules in organic sorbate-humic matter interactions. © 2012 Springer Science+Business Media New York.
Note:
Related Files :
Biological materials
Hydration effect
Mineral surfaces
Molecules
Quartz
Sorption isotherms
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/s10450-012-9446-7
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
32728
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:12
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Scientific Publication
The effect of organic sorbates on water associated with environmentally important sorbents: Estimating and the LFER analysis
19
Borisover, M., Institute of Soil, Water and Environmental Sciences, Volcani Center, POB 6, Bet Dagan 50250, Israel
The effect of organic sorbates on water associated with environmentally important sorbents: Estimating and the LFER analysis
The effect of organic sorbates on the water associated with naturally occurring sorbents is of significant interest since it probes the hydration of a sorbate-specific microenvironment and its role in a compound partitioning between various environmental compartments. This effect was described in a thermodynamically strict way by converting the sorption isotherms of organic vapors on variously hydrated sorbents into the derivatives relating the change in the amount of water associated with a sorbent to the change in the amount of an organic sorbate. Further, these derivatives were analyzed by means of the Linear Free Energy Relationship (LFER). The analysis included the sorption data for various organic vapors on such environmentally important sorbents as quartz, metal oxides, calcite, clay minerals and humic acid. From the LFER analysis it followed that (i) organic sorbate polarizability contributions from n- and π-electrons resulted in driving water into the sorbent phase; (ii) the increasing volume of the organic compounds involved expelling water molecules; (iii) the increasing hydrogen-bond acidity and basicity of organic sorbates resulted in expelling water from inorganic surfaces but in enhancing hydration of the humic phase. In contrast to inorganic surfaces, when sorbed on strongly hydrated humic acid, the majority of organic sorbates containing oxygen, nitrogen or sulfur atoms drive water into the sorbent phase. Several molecules of water may need to be cosorbed by a humic sorbent for each sorbed molecule of an organic compound thus supporting the possibility of the concomitant participation of a number of water molecules in organic sorbate-humic matter interactions. © 2012 Springer Science+Business Media New York.
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