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Controlled release of the herbicides 2,4‐ D and dichlobenil from alginate gels
Author(s) -
Connick William J.
Publication year - 1982
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1982.070270912
Subject(s) - barium chloride , acetic acid , chloride , calcium alginate , chemistry , calcium , chromatography , barium , controlled release , nuclear chemistry , materials science , biochemistry , organic chemistry , nanotechnology
The herbicides 2,4‐ D [(2,4‐dichlorophenoxy)acetic acid] and dichlobenil (2,6‐dichlorobenzonitrile) were individually incorporated into 1.6–2.8‐mm alginate gel beads by using calcium chloride and barium chloride as gellants. The release rate of each herbicide from the beads into water was greatly influenced by drying and the choice of gellant cation. Slowest release was obtained with dried samples that were gelled with barium chloride. At the slowest rates, release of 2,4‐ D was complete in 14 days, while only 59% of the less‐soluble dichlobenil was released in 150 days.