N'-(3,4-Dichlorophenyl)-1-methozy-1-methylurea (linuron) and 3,4-dimethyl-2,6-dinitro-N-pentan-3-yl-aniline (pendimethalin) herbicides were sepd. by adsorption on 3 corn. zeolites from aq. solns. (initial concns. 10 and 20 mg/L) at 24 degrees C for 3 h. Pendimethalin was removed more efficiently (more than 80%) than linuron (only 10%).