Crop resides as lon-exchange materials. Treatment of soybean hull and sugar beet fiber (pulp) with epichlorohydrin to improve cation-exchange capacity and physical stability
Article first published online: 10 MAR 2003
Copyright © 1994 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 52, Issue 4, pages 531–538, 25 April 1994
How to Cite
Laszlo, J. A. and Dintzis, F. R. (1994), Crop resides as lon-exchange materials. Treatment of soybean hull and sugar beet fiber (pulp) with epichlorohydrin to improve cation-exchange capacity and physical stability. J. Appl. Polym. Sci., 52: 531–538. doi: 10.1002/app.1994.070520408
- Issue published online: 10 MAR 2003
- Article first published online: 10 MAR 2003
- Manuscript Accepted: 28 SEP 1993
- Manuscript Received: 16 AUG 1993
Ion exchange systems for the treatment of process water or wastewater may benefit by the use of inexpensive, disposable exchange materials before, or in place of, conventional regenerable exchange resins. Various agricultural by-products have been proposed as suitable exchangers for this role, but they generally fail to have adequate capacity and physical stability for most applications. Two by-products, soybean hull and sugar beet fiber, were found to have enhanced cation-exchange capacity and stability upon treatment with epichlorophydrin and base. Exchange capacity was determined by measuring calcium binding. Physical stability was judged by three different aqueous extraction regimens. The most efficacious and economical reaction conditions found were: soybean hull and sugar beet fiber hydrated with water at a water-to-solids ratio of 6.4 : 1 and 8 : 1 (v/w), respectively, and epichlorohydrin applied at a 0.3 : 1 (v/w) ratio, for 6 h at room temperature. The resultant cross-linked materials had cation-exchange capacities of approximately 0.9 (soybean hull) and 1.3 (sugar beet fiber) meq/g dry weight. These epichlorohydrin-treated agricultural by-products may serve as cost-effective, multivalent-cation exchanges. © 1994 John Wiley & Sons, Inc.