Abstract：
:Based on literature kinetic data, it is shown that the photochemical transformation of cycloxydim (CXD) in surface waters would mainly occur by direct photolysis. Reaction of CXD with (1)O2 and with the triplet states of chromophoric dissolved organic matter would only account for a small fraction (⩽2%) of total phototransformation. The second-order reaction rate constant between CXD and OH is not known. However, estimates based on data analysis with the APEX software and on diffusion-control kinetics in water indicate that OH would account for less than 10% of CXD phototransformation. The photochemical half-life time of CXD in mid-latitude summertime would vary in the day-month range, depending on water chemistry and depth. Transformation would be favoured in shallow waters with low dissolved organic carbon.
journal_name
Chemospherejournal_title
Chemosphereauthors
Vione Ddoi
10.1016/j.chemosphere.2013.10.078subject
Has Abstractpub_date
2014-03-01 00:00:00pages
272-5eissn
0045-6535issn
1879-1298pii
S0045-6535(13)01512-9journal_volume
99pub_type
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