Pesticides microencapsulation. A safe and sustainable industrial process

BACKGROUND In the pesticides industry, pesticides have different degrees of health hazard, ranging from respiratory exposure to penetration through the skin, the unsafe handling of high viscosity liquid pesticides and the hazardous organic solvents chosen to manufacture the formulated pesticides. Co...

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Published in:Journal of chemical technology and biotechnology (1986) 2014-07, Vol.89 (7), p.1077-1085
Main Authors: Alonso, Mariluz L., Laza, Jose M., Alonso, Rosa M., Jiménez, Rosa M., Vilas, Jose L., Fañanás, Roberto
Format: Article
Language:English
Subjects:
Chemical industries
cyclodextrin
Economics
Electrophoresis
Formations
fungicide
Inclusion complexes
insecticide
Mathematical analysis
Microencapsulation
Pesticides
physicochemical techniques
Stoichiometry
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Summary:BACKGROUND In the pesticides industry, pesticides have different degrees of health hazard, ranging from respiratory exposure to penetration through the skin, the unsafe handling of high viscosity liquid pesticides and the hazardous organic solvents chosen to manufacture the formulated pesticides. Considering all these drawbacks, microencapsulation techniques can be the most efficient way of using pesticides due to their important advantages. In the manufacturing process it is important to choose the best encapsulating agent and to calculate the stoichiometry of the process in order to achieve safety, environmental and economic benefits. In this work, an encapsulation process with β‐cyclodextrin (CD) and pesticides has been developed with maximum recovery. The insecticidal effect has been tested using cockroaches. RESULTS The stoichiometry of inclusion complexes, from 1:1 to 1:3 for pesticide:β‐cyclodextrin has been calculated by phase solubility analysis and both UV–vis spectrophotometry and capillary zone electrophoresis. The formation of complexes has been confirmed by different physicochemical analysis. On the other hand, the insecticidal effect by contact and inhalation has been allayed due to the protection of insecticide with CD. CONCLUSIONS The formation of inclusion complexes between pesticides and β‐cyclodextrin makes a safe, environmental and economically sustainable industrial process. © 2013 Society of Chemical Industry
ISSN:0268-2575
1097-4660
DOI:10.1002/jctb.4204