Development of a hydrogel-based reactive matrix for removal of chloracetanilide herbicides from contaminated water

Article Abstract:

Ethanethiol-cellulose beads can be used to remove chloracetanilide herbicides from contaminated water. This was found in an investigation of the usefulness of hydrogel-based beads in the decontamination of waters containing metachlor and other pesticides. A novel approach using 1,1'-carbonyldiimidazole was applied to synthesize ethanethiol-cellulose beads, followed by reaction with aminoethanethiol. Batch reaction conditions and fixed-bed column techniques were used to examine the use of thiol-derivatized beads to remove metachlor from aqueous solutions.

Environmental aspects, Bioremediation, Water pollution

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Chloroaniline/lignin conjugates as model system for nonextractable pesticide residues in crop plants

Article Abstract:

An enhanced DHP model system was utilized to analyze nonextractable pesticide residues in crop plants. The model permits the utilization of in vitro lignin copolymers as a reference system for the structural characteristics and the bioavailability of nonextractable pesticide residues in crop plants. The model revealed that the existence of facile acid hydrolysis and high animal bioavailability can be attributed to usage of high mole ratios.

All Other Miscellaneous Crop Farming, Crop Farms, General farms, primarily crop, Lignin

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Dechlorination of the chloroacetanilide herbicides alachlor and metolachlor by iron metal

Article Abstract:

Granular iron proved useful in the dechlorination of the chloroacetanilide herbicides such as alachlor and metolachlor. The 40 g of granular iron metal contacted with the herbicides produced chloride and dechlorinated acetinilides. The dechlorination of alachlor have occurred via hydrogenolysis of the chloroacetyl group followed by an N-dealkyation reaction.

Research and Development in the Physical, Engineering, and Life Sciences, All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Iron Compounds NEC, Pollution R&D NEC, Herbicides, Usage, Iron, Iron (Metal), Pollution control research, Iron compounds, Alachlor

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