Atrazine catalysts

Joo, S.H. and Zhao, D. (2008) Destruction of lindane and atrazine using stabilized iron nanoparticles under aerobic andanaerobic conditions effects of catalyst and stabilizer. Chemosphere, 70, 418—425. 

Pelizzetti et al. (1990) investigated the photocatalytic degradation of atrazine in solution in the presence of suspended titanium dioxide as a catalyst under simulated sunlight. Degradation was rapid but mineralization did not occur. Intermediate compounds included 6-hydroxy-A/-ethyl-/V -(l-methylethyl)-5 triazine-2,4-diamine, 2,4-diamino-6-chloro-A/-(l-methylethyl)-5-triazine, 2,4-di-amino-6-chloro-/V-ethyl-5-triazine, 2,4-diamino-6-chloro-5-triazine, 2,4-diamino-6-hydroxy-5-tri-azine, 2-amino-4,6-dihydroxy-5-triazine, 2-amino-4-hydroxy-6-chloro-5-triazine, 2,4-dihydroxy-6-chloro-s-triazine, 6-chloro-/V-acetyl-/V -(l-methylethyl)-5-triazine-2,4-diamine, and cyanuric acid as the final product. 

Atrazine Hydrolysis Al- and H- montmo-rillonite montmo-lillonitic soil clay Ca- and Cu- clays much weaker catalysts... 

Atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine), a photosynthetic inhibitor that is used in large quantities for weed control in com and sorghum, has been treated electrochemically in aqueous solution on reticulated vitreous carbon cathode in the presence of noble-metal catalysts (Stock and Bunce 2002). Elec-trocatalytic hydrogenolysis to 2-ethylamino-4-isopropylamino-s-triazine occurs in quantitative yield, and is most efficient with Pd-based catalysts. Current efficiency increases with increasing atrazine and catalyst concentration, and decreasing current density. The Authors observed a time lag between the start of the electrolysis and the appearance of the dechlorinated products, which was attributed to the absorption of hydrogen by the palladium lattice. As alternative to the electrochemical treatment, the degradation of chlorinated triazines by zero-valent-iron was already mentioned (Dombek et al. 2004). 

Fig. 8-7 Catalyst for the decomposition of atrazine synthesized by the molecular imprinting technique...

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