נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Use of CV- and TPP-montmorillonite for the removal of priority pollutants from water
Year:
2007
Source of publication :
Applied Clay Science
Authors :
Botnick, Ilan
;
.
Volume :
36
Co-Authors:
Rytwo, G., Tel Hai Academic College, Environmental Sciences Department, Upper Galilee, 12210, Israel, MIGAL, Galilee Technological Center, Kiryat Shmona, Israel
Kohavi, Y., Tel Hai Academic College, Environmental Sciences Department, Upper Galilee, 12210, Israel
Botnick, I., Tel Hai Academic College, Environmental Sciences Department, Upper Galilee, 12210, Israel
Gonen, Y., Tel Hai Academic College, Environmental Sciences Department, Upper Galilee, 12210, Israel
Facilitators :
From page:
182
To page:
190
(
Total pages:
9
)
Abstract:
The term "priority pollutants" is used to define chemicals hazardous to aquatic life or human health. Thus, it is essential to remove such pollutants from water and try to reduce their impact. Clay minerals might be helpful in the removal of hazardous chemicals, due to impressive adsorption properties. Natural clay minerals adsorb cations and non-charged hydrophilic compounds, but almost do not interact with anions and hydrophobic pollutants as most organic pollutants, including naphthalene and phenolic derivatives. By pre-treating clay minerals with a suitable organic cation, the surface properties of the adsorbent may be adapted, and fast sorption is observed, removing large amounts of such pollutants. In this study we present efficient sorption of naphthalene and several phenolic derivatives to organoclays prepared by adsorption of crystal violet or tetraphenylphosphonium ions on montmorillonite, until a charged-neutralized surface is obtained. The amounts of pollutant adsorbed are at least of the same order of magnitude of those measured for high quality activated carbon, but the adsorption proceeds almost immediately, whereas for activated carbon it takes tens of minutes. The proposed organoclays were mixed with sand and tested in column filters, showing complete removal of high concentration of pollutant at several pore volumes. The adsorbents can also efficiently be applied in "sequential batch" reactors due to the fast adsorption kinetic, followed by flocculation that allows easy separation of the purified effluent. A volume of 150 ml of a 1000 μM TCP solution was completely purified to levels below 3 μM, by means of 0.25 g organoclay. © 2006 Elsevier B.V. All rights reserved.
Note:
Related Files :
Adsorption
Clay minerals
Hydrophobicity
phenolic compound
Phenolic derivatives
Surface properties
Show More
Related Content
More details
DOI :
10.1016/j.clay.2006.04.016
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29864
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:50
You may also be interested in
Scientific Publication
Use of CV- and TPP-montmorillonite for the removal of priority pollutants from water
36
Rytwo, G., Tel Hai Academic College, Environmental Sciences Department, Upper Galilee, 12210, Israel, MIGAL, Galilee Technological Center, Kiryat Shmona, Israel
Kohavi, Y., Tel Hai Academic College, Environmental Sciences Department, Upper Galilee, 12210, Israel
Botnick, I., Tel Hai Academic College, Environmental Sciences Department, Upper Galilee, 12210, Israel
Gonen, Y., Tel Hai Academic College, Environmental Sciences Department, Upper Galilee, 12210, Israel
Use of CV- and TPP-montmorillonite for the removal of priority pollutants from water
The term "priority pollutants" is used to define chemicals hazardous to aquatic life or human health. Thus, it is essential to remove such pollutants from water and try to reduce their impact. Clay minerals might be helpful in the removal of hazardous chemicals, due to impressive adsorption properties. Natural clay minerals adsorb cations and non-charged hydrophilic compounds, but almost do not interact with anions and hydrophobic pollutants as most organic pollutants, including naphthalene and phenolic derivatives. By pre-treating clay minerals with a suitable organic cation, the surface properties of the adsorbent may be adapted, and fast sorption is observed, removing large amounts of such pollutants. In this study we present efficient sorption of naphthalene and several phenolic derivatives to organoclays prepared by adsorption of crystal violet or tetraphenylphosphonium ions on montmorillonite, until a charged-neutralized surface is obtained. The amounts of pollutant adsorbed are at least of the same order of magnitude of those measured for high quality activated carbon, but the adsorption proceeds almost immediately, whereas for activated carbon it takes tens of minutes. The proposed organoclays were mixed with sand and tested in column filters, showing complete removal of high concentration of pollutant at several pore volumes. The adsorbents can also efficiently be applied in "sequential batch" reactors due to the fast adsorption kinetic, followed by flocculation that allows easy separation of the purified effluent. A volume of 150 ml of a 1000 μM TCP solution was completely purified to levels below 3 μM, by means of 0.25 g organoclay. © 2006 Elsevier B.V. All rights reserved.
Scientific Publication
You may also be interested in