Publication

A novel approach for the extraction of herbicides and pesticides from water using liquid-core microcapsules

Urs von Stockar, Ian William Marison, Anne Wyss
2004
Journal Articles

Abstract

A perstraction system using liq.-core microcapsules for pesticide and herbicide removal from aq. environments is proposed. The microcapsules contain an oil, di-Bu sebacate, surrounded by a hydrogel membrane. The extn. efficiency of the capsules was demonstrated with atrazine, methylparathion, ethylparathion, and 2,4-dichloro-phenoxyacetic acid. The results show that all of the tested compds. could be rapidly extd., typically 75% extn. within 10 min using a capsule: liq. vol. ratio of only 3.5% for ethylparathion, and that the rate of extn. increased with increasing hydrophobicity of the compd. to be extd. Higher rates of extn. could be achieved by changing the capsule: liq. vol. ratio. The effect of different liq. core solvents, size of capsules, agitation rate, and treatment with complexing agents on the properties of the microcapsules and extn. rate were studied. Capsules of a diam.

Official source

https://infoscience.epfl.ch/entities/publication/c4cc292d-c39f-4197-9824-330203ec48db

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Urs von Stockar, Ian William Marison, Anne Wyss
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c4cc292d-c39f-4197-9824-330203ec48db

About this result

Related concepts (32)

Membrane

A membrane is a selective barrier; it allows some things to pass through but stops others. Such things may be molecules, ions, or other small particles. Membranes can be generally classified into synthetic membranes and biological membranes. Biological membranes include cell membranes (outer coverings of cells or organelles that allow passage of certain constituents); nuclear membranes, which cover a cell nucleus; and tissue membranes, such as mucosae and serosae.

Pesticide

Pesticides are substances that are meant to control pests. This includes herbicide, insecticide, nematicide, molluscicide, piscicide, avicide, rodenticide, bactericide, insect repellent, animal repellent, microbicide, fungicide, and lampricide. The most common of these are herbicides, which account for approximately 50% of all pesticide use globally. Most pesticides are intended to serve as plant protection products (also known as crop protection products), which in general, protect plants from weeds, fungi, or insects.

Pesticide resistance

Pesticide resistance describes the decreased susceptibility of a pest population to a pesticide that was previously effective at controlling the pest. Pest species evolve pesticide resistance via natural selection: the most resistant specimens survive and pass on their acquired heritable changes traits to their offspring. If a pest has resistance then that will reduce the pesticide's efficacy efficacy and resistance are inversely related. Cases of resistance have been reported in all classes of pests (i.e.

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A novel approach for the extraction of herbicides and pesticides from water using liquid-core microcapsules

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