Controlled release of aldicarb from lignin loaded ionotropic hydrogel microspheres

Date

1999-09-01

Author

Kok, FN
Wilkins, RM
Cain, RB
Arica, MY
Alaeddinoglu, G
Hasırcı, Vasıf Nejat

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Aldicarb loaded microspheres of carboxymethyl cellulose, CMC, of various compositions were prepared with the crosslinking action of AI(III). Into these microspheres, lignin was introduced as a filler to further regulate the rate of release. The encapsulation efficiency was low (4.15-13.00%) due to the high water solubility of aldicarb. Release into aqueous media was quite rapid and almost complete within 24h. Initial stages of the release (60% of AS released) was investigated to determine the release mechanism and it was found that release from the microspheres was governed by Fickian diffusion. Among the various parameters, the ratio of lignin to CMC and aldicarb to CMC were found to be influential on the rate of release from the crosslinked CMC-lignin microspheres. The soil behaviour confirmed the delayed release effect of the controlled release formulation compared to Temik (a commercial preparation of aldicarb), especially when lignin was incorporated.

Subject Keywords

Aldicarb, Carboxymethylcellulose, Microspheres, Controlled release, Lignin

URI

https://hdl.handle.net/11511/31445

Collections

Graduate School of Natural and Applied Sciences, Article