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STABILITY OF PARATHION ON ATTAPULGITE AS AFFECTED BY STRUCTURAL AND HYDRATION CHANGES.
Year:
1981
Source of publication :
Clays and Clay Minerals
Authors :
Gerstl, Zev
;
.
Volume :
29
Co-Authors:
Gerstl, Zev
Yaron, Bruno
Facilitators :
From page:
53
To page:
59
(
Total pages:
7
)
Abstract:
The structure and hydration status of attapulgite clay after heating at elevated temperatures and the stability of parathion on these clays was studied. It was found that the bound water was lost in two steps, at 250 degree and 450 degree C, with the first step being largely reversible. At 650 degree C the structure began to dissolve releasing significant amounts of Mg, and a decrease in aggregate porosity was noted. At 850 degree C an amorphous phase was formed bearing little resemblance to the original attapulgite. Parathion was stable on all of the preheated clays when kept at 25 degree C for 190 days. The reactions of parathion on the preheated clays was studied at 110 degree C. Hydrolysis of parathion was found to be minimal. Isomerization was the main reaction occurring on the Ca-attapulgite, whereas on an organo-clay no isomerization was observed. Refs.
Note:
Related Files :
ATTAPULGITE CLAY
CHEMICAL REACTIONS
Clay
Mineralogy
pesticides
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More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Language:
English
Editors' remarks:
ID:
28147
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:37
Scientific Publication
STABILITY OF PARATHION ON ATTAPULGITE AS AFFECTED BY STRUCTURAL AND HYDRATION CHANGES.
29
Gerstl, Zev
Yaron, Bruno
STABILITY OF PARATHION ON ATTAPULGITE AS AFFECTED BY STRUCTURAL AND HYDRATION CHANGES.
The structure and hydration status of attapulgite clay after heating at elevated temperatures and the stability of parathion on these clays was studied. It was found that the bound water was lost in two steps, at 250 degree and 450 degree C, with the first step being largely reversible. At 650 degree C the structure began to dissolve releasing significant amounts of Mg, and a decrease in aggregate porosity was noted. At 850 degree C an amorphous phase was formed bearing little resemblance to the original attapulgite. Parathion was stable on all of the preheated clays when kept at 25 degree C for 190 days. The reactions of parathion on the preheated clays was studied at 110 degree C. Hydrolysis of parathion was found to be minimal. Isomerization was the main reaction occurring on the Ca-attapulgite, whereas on an organo-clay no isomerization was observed. Refs.
Scientific Publication
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