Give Compound 14 or Calcitriol Rocaltrol Compound 10 Compound 13 was. Further oxidation of arylethyl, cleavage of the methoxymethyl group N is an important feature of the Umweltzerst Tion of alachlor. The mechanism of the N dealkylation was previously reported for the oxidation of atrazine O3. Similarly, k nnte Compound 7 also w Be generated during the ozonation of alachlor. In turn giving both the oxidation of arylethyl group of compound 7 and 13 8 N dealkylation of a compound Cyclization was an important way in the photochemical and photocatalytic degradation of alachlor. In this study, the cyclization of N dealkylation of alachlor was initiated to form compound 5. The oxidation of compound 5 or further cyclizing the compound resulted in compound 8 12 Generate the electrophilic attack of ozone on the benzene ring or a group would arylethyl compounds III and IV, which also w Were during the photocatalytic oxidation of alachlor detected. Somic et al. produces proposed that the cleavage of the benzene ring in the degradation of alachlor and ozone and formic acid, acetic acid, propionic acid, oxalic acid were occurring. In Similar way, k Cleavage of the benzene ring of compounds III and IV nnte to the formation of these organic S Lead acids. In general, dechlorination was not involved in direct ozonation. Ozone molecule is difficult to remove chlorine. However, tend occur, and therefore cleavage of the N chloroacetyl compound 1 and mono chloro acetic Acid could be produced, which represented approximately 48% of the total degradation of alachlor, as above. Cyclizing the compound also to compounds 2 and 4 In O3/H2O2, compound 14 was due to oxidation of the OH group generated by arylethyl. Further oxidation would compound 13 After N dealkylation and cyclization 8 and 12 compounds were formed in succession. Produced by the direct addition of OH, k Nnte compounds III and IV. Similar to the direct ozonation, are small organic S Acids, produced by cleavage of the benzene ring. About 30% of the alachlor was degraded by removal of the N chloroacetyl, resulting in the formation of compound 1 and monochloro acetic Acid, and successively the compounds 2 and 4 by cyclization. The press further includes observed chloride dechlorination of alachlor to OH attack. 20.60 N diethyl 2-hydroxy acetanilide in an expected by-product formed by dechlorination. However, this compound was probably not detected because of the limit of the analytical procedure. The compounds 2, 4 and 12 seem resistant to oxidation than alachlor on their chemical structures. If you benzene ring by OH or O3 are broken k Can, k Nnte the m Possible formation of small organic S to be expected Acids. 3.5. Toxicity t assess inhibition values of alachlor L Solutions, the mobility of Daphnia examined before and after oxidation by the D. magna bioassay were 5.8%, 33.8, 23.3 and 26.7 5.8% 11.5%. We see that after either O3 or O3/H2O2 oxidation toxicity t L Reduced slightly from alachlor solution. Upham et al. also reported that ozonated w ssrige L measurements of alachlor slightly less toxic to the gap junctional intercellular were re communication that alachlor itself. The fact that the L Treated solution alachlor Similar toxicity Tr remained.