Synthesis of iron-exchanged Na-P1 zeolites with different iron release properties

Iron-exchanged zeolites are used as iron nutrient source to plants. To develop materials which allow an effective supply of iron, we prepared iron-exchanged Na-P1 zeolites using ferric chloride (FeChl-Z) and ferric citrate (FeCit-Z) solutions via a cation exchange method, and evaluated the chemical...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2018-11, Vol.187 (1), p.12074
Main Authors: Kumon, A, Abidin, Z, Matsue, N
Format: Article
Language:English
Subjects:
Acetic acid
Ammonium
Ammonium acetate
Cation exchange
Cation exchanging
Citric acid
Ferric chloride
Ferric citrate
Iron
Nutrient release
Zeolites
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Summary:Iron-exchanged zeolites are used as iron nutrient source to plants. To develop materials which allow an effective supply of iron, we prepared iron-exchanged Na-P1 zeolites using ferric chloride (FeChl-Z) and ferric citrate (FeCit-Z) solutions via a cation exchange method, and evaluated the chemical form and release property of the iron. The content of iron in FeChl-Z and FeCit-Z was 199 and 225 mmol kg-1, respectively. FeChl-Z mainly contained highly polymerized hydroxy-iron species, whereas FeCit-Z contained mainly monomeric to oligomeric hydroxy-iron species. 1 M ammonium acetate solution (pH 4.5) extracted 68% and 17% iron from FeCit-Z and FeChl-Z, respectively. This suggests that the different iron form retained by the methods using different iron solutions influenced iron release properties of the iron-exchanged zeolites.
ISSN:1755-1307
1755-1315
1755-1315
DOI:10.1088/1755-1315/187/1/012074