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United States Department of Agriculture

Agricultural Research Service

Title: Stability of Ion Exchange Resins under Freeze-Thaw and Wet-Dry Conditions

Authors
item Mamo, M - UNIV OF NEBRASKA
item Eghball, Bahman
item Ginting, Daniel - UNIV OF NEBRASKA
item Renken, R - UNIV OF NEBRASKA

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: July 21, 2001
Publication Date: November 1, 2001
Citation: MAMO, M., EGHBALL, B., GINTING, D., RENKEN, R. STABILITY OF ION EXCHANGE RESINS UNDER FREEZE-THAW AND WET-DRY CONDITIONS. AMERICAN SOCIETY OF AGRONOMY ABSTRACTS #161908. 2001.

Interpretive Summary: The stability of resins (anionic and cationic) used in mineralization studies of organic matter is not well known under various physical environmental conditions. The objective of this study was to measure the changes in N and P adsorption characteristics of resins subjected to freeze-thaw or wet-dry cycles. Mixed bed resins (1:1 anionic- cationic by weight) were subjected to 1, 3, 10, and 30 freeze-thaw and/or wet-dry cycles. The wet conditions was set to field capacity (FC) at 0.33 MPa and the dry cycle was set when resins reached 70% FC. Resins at FC were frozen for 16 h and thawed to room temperature for 8 h daily. For the wet-dry cycles, wet resin was kept in forced-air oven at 27 oC for 28 h and rewetted to FC for 20 h. The results indicate that alternating and prolonged freezing and thawing cycles does not change the stability of resins.

Technical Abstract: The stability of resins (anionic and cationic) used in mineralization studies of organic matter is not well known under various physical environmental conditions. The objective of this study was to measure the changes in N and P adsorption characteristics of resins subjected to freeze-thaw or wet-dry cycles. Mixed bed resins (1:1 anionic- cationic by weight) were subjected to 1, 3, 10, and 30 freeze-thaw and/or wet-dry cycles. The wet conditions was set to field capacity (FC) at 0.33 MPa and the dry cycle was set when resins reached 70% FC. Resins at FC were frozen for 16 h and thawed to room temperature for 8 h daily. For the wet-dry cycles, wet resin was kept in forced-air oven at 27 oC for 28 h and rewetted to FC for 20 h. The results indicate that alternating and prolonged freezing and thawing cycles does not change the stability of resins.

Last Modified: 8/1/2014
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