נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Sorption of organic compounds of varying hydrophobicities from water and industrial wastewater by long- and short-chain organoclays
Year:
2004
Source of publication :
Applied Clay Science
Authors :
גרסטל, זאב
;
.
מינגלגרין, אורי
;
.
Volume :
24
Co-Authors:
Groisman, L., Research Laboratory of Water Quality, Ministry of Health, P.O. Box 8255, Tel-Aviv 61080, Israel
Rav-Acha, C., Research Laboratory of Water Quality, Ministry of Health, P.O. Box 8255, Tel-Aviv 61080, Israel
Gerstl, Z., Inst. of Soil, Water/Environ. Sci., The Volcani Center, ARO, P.O. Box 6, Bet Dagan 50250, Israel
Mingelgrin, U., Inst. of Soil, Water/Environ. Sci., The Volcani Center, ARO, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
159
To page:
166
(
Total pages:
8
)
Abstract:
It is generally assumed that short-chain organoclays are better sorbents for non-ionic organic compounds than are the long-chain organoclays. We believe that the above statement is correct only for relatively hydrophilic or slightly hydrophobic compounds and that the opposite should be true for highly hydrophobic compounds, namely, that long-chain organoclays are expected to be superior to the short-chain analogs for sorption of highly hydrophobic materials.To verify our hypothesis, the sorption of six compounds with a range of log Kow values from 2.5 to 6 was studied on tetramethyltriammonium-(TMA) and octadecyltrimethylammonium-(ODTMA) bentonite, representing short- and long-chain organoclays, respectively. Compounds with low or medium hydrophobicities (log Kow 2.5-3.8) were more strongly sorbed on the short-chain organoclay, whereas the more hydrophobic compounds (log Kow 5.2-6.1) were better sorbed on the long-chain organoclay, in agreement with our hypothesis. The efficacy of organoclays in removing organic pollutants from the effluent of a pesticide producing plant was evaluated. Pesticide sorption from the wastewater was studied on both types of organoclays. It was found that both organoclays were able to remove organic pollutants from industrial wastewater, but solute uptake by short-chain organoclays was strongly depressed by competition, while long-chain organoclays were only slightly affected, if at all, by the presence of competing solutes in the industrial wastewater. © 2003 Elsevier B.V. All rights reserved.
Note:
Related Files :
Hydrophobicity
Industrial wastewater
Organic pollutants
Organoclays
pesticides
Sorption
Wastewater
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.clay.2003.02.001
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
22472
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:52
Scientific Publication
Sorption of organic compounds of varying hydrophobicities from water and industrial wastewater by long- and short-chain organoclays
24
Groisman, L., Research Laboratory of Water Quality, Ministry of Health, P.O. Box 8255, Tel-Aviv 61080, Israel
Rav-Acha, C., Research Laboratory of Water Quality, Ministry of Health, P.O. Box 8255, Tel-Aviv 61080, Israel
Gerstl, Z., Inst. of Soil, Water/Environ. Sci., The Volcani Center, ARO, P.O. Box 6, Bet Dagan 50250, Israel
Mingelgrin, U., Inst. of Soil, Water/Environ. Sci., The Volcani Center, ARO, P.O. Box 6, Bet Dagan 50250, Israel
Sorption of organic compounds of varying hydrophobicities from water and industrial wastewater by long- and short-chain organoclays
It is generally assumed that short-chain organoclays are better sorbents for non-ionic organic compounds than are the long-chain organoclays. We believe that the above statement is correct only for relatively hydrophilic or slightly hydrophobic compounds and that the opposite should be true for highly hydrophobic compounds, namely, that long-chain organoclays are expected to be superior to the short-chain analogs for sorption of highly hydrophobic materials.To verify our hypothesis, the sorption of six compounds with a range of log Kow values from 2.5 to 6 was studied on tetramethyltriammonium-(TMA) and octadecyltrimethylammonium-(ODTMA) bentonite, representing short- and long-chain organoclays, respectively. Compounds with low or medium hydrophobicities (log Kow 2.5-3.8) were more strongly sorbed on the short-chain organoclay, whereas the more hydrophobic compounds (log Kow 5.2-6.1) were better sorbed on the long-chain organoclay, in agreement with our hypothesis. The efficacy of organoclays in removing organic pollutants from the effluent of a pesticide producing plant was evaluated. Pesticide sorption from the wastewater was studied on both types of organoclays. It was found that both organoclays were able to remove organic pollutants from industrial wastewater, but solute uptake by short-chain organoclays was strongly depressed by competition, while long-chain organoclays were only slightly affected, if at all, by the presence of competing solutes in the industrial wastewater. © 2003 Elsevier B.V. All rights reserved.
Scientific Publication
You may also be interested in