Removal of pesticides from aqueous solutions using liquid membrane emulsions
Extractive liquid membrane technology is based on a water-in-oil emulsion as the vehicle to effect separation. An aqueous internal reagent phase is emulsified into an organic phase containing a surfactant and optional complexing agents. The emulsion, presenting a large membrane surface area, is then dispersed in an aqueous continuous phase containing the species to be removed. The desired species is transferred from the continuous, phase through the organic liquid membrane and concentrated in the internal reagent phase. Extraction and stripping occur simultaneously rather than sequentially as in conventional solvent extraction. Experiments were conducted to assess the feasibility of using liquid membranes to extract pesticides from rinsewaters typical of those generated by fertilizer/agrichemical dealers. A liquid membrane emulsion containing 10% NaOH as the internal reagent phase was used to extract herbicides from aqueous solution at a continuous phase:emulsion ratio of 5:1. Removals of 2,4-D, MCPA, Carbaryl, Diazinon, and Atrazine were investigated.
- Research Organization:
- National Fertilizer and Environmental Research Center, Muscle Shoals, AL (United States)
- Sponsoring Organization:
- Tennessee Valley Authority, Knoxville, TN (United States)
- OSTI ID:
- 10102711
- Report Number(s):
- TVA-Bull-Z-293; CONF-9102188-2; ON: DE93002591
- Resource Relation:
- Conference: International workshop on research in pesticide treatment/disposal/waste minimization,Cincinnati, OH (United States),26-28 Feb 1991; Other Information: PBD: [1991]
- Country of Publication:
- United States
- Language:
- English
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