Coumaphos degradation

Inhalation, ingestion, dermal Acetylcholinesterase degradation Weakness, loss of appetite, weight loss, headache, dizziness, shaking, nausea, stomach cramps, diarrhea, perspiration Insecticides, acaricides Dichlorvos, chlorpyrifos, ethion, diazanon, dimethoate, acephate, malathion, azinphos-methyl, pirimphos-methyl, terbufos, coumaphos, phosmet... 

Coumaphos was resistant to any degradation by UV-ozonatlon, with only 25% degraded over a 5 h period (29). Exposure of coumaphos cattle-dip suspensions to large concentrations of mechanically generated ozone Indicated that this compound was very resistant to oxidation by ozone. 

Coumaphos, fluvalinate, and bromopiopylate (and its degradation compound 4,4 -dibromobenzophenone) were isolated from honey and separated in 8 min on a capillary C g column (A = 3l3nm, 254ran, 233nm, 313nm, respectively) using a... 

In an approach to utilize enzymes to degrade pesticides recombinant organo-phosphate hydrolase (OPH) was anchored to the surface of E.coli cells and packed in a bioreactor [7]. A similar approach used E.coli cells with OPH on the surface, immobilized on glass beads [7], silica beads [8] or nylon [9]. In 2005 a group reported the immobilization of the pesticide degrading enzyme OPH on a cellulose matrix. The enzyme was attached to the matrix via a cellulose binding domain [10]. When packed in a column bioreactor the immobilized OPH was able to degrade a 0.2 mM solution of the pesticide coumaphos rapidly and without loss of activity over 2 months [11]. Another possibility to use enzymes in a solid form to catalyze... 

Laboratory-scale smdies in degradation of pesticides are very important, since they allow the simulation of the behavior of pesticides in conditions that can be applied on field-scale. Mulbry et al., have developed a biofilter capable of handling about 15,000 dip-liter batches of dip waste containing the organophosphate pesticide, coumaphos. This biofllter was able to reduce the concentration of couma-phos from 2000 to 10 ppm in approximately 14 days at 25-29 °C, demonstrating the importance of the field-scale smdies (Mulbry et al. 1998). 

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