Some environmental behavious of cetane were
studied using the tracing technique of 14C-cetane, rice pot culture and sequential
solvent-extraction method. Results showed that cetane entered easily into rice plant and accumulated in rice grain, thus giving harmful effects on human health. Existing forms and metabolic process of 14C-cetane in soil and rice were also studied. 14C originated from cetane maily existed as
solvent-
extracted form (about 39% of all 14C), and second one in undecomposed remains of plants (about 25%) and fulvic acid (about 23%) in soil. 14C existing as carbonat was about 10%. 14C entering in humic acid (include humin) was less (about 3%). Cetane mainly existed as bound residue in rice, with amount being 98% of all 14C in plant. The organic solvents-extracted (petroleumether, ether and ethanol) amount was 2%. The shorter the bine passed after cetane addition in rice system, and the less the form of bound residues, the more the solvent-extrasted part. Polar metabolites with a bigger Rf-value accounted for 21% in the petroleum etherextracted part.