Dissipation of 4-Chloroaniline and 4-Chlorophenol from Soils

JUI-HUNG YEN, SHIN-WEI CHEN AND YEI-SHUNG WANG*

Department of Agricultural Chemistry, National Taiwan University, Taipei, Taiwan, Republic of China

ABSTRACT

Release of 4-chloro[U-14C]aniline, 4-chloro[U-14C]phenol and their 14C-containing metabolites from Yangminshan loamy and Wufeng clay-loamy soils was determined after treatment with different concentrations.   Only 1 to 2% of 14C in 14C-containing compounds from Yangminshan loamy soil and less than 8% of 14C in 14C-containing compounds from Wufeng clay-loamy soil were released by treatment with 4-chloro[U-14C]aniline for 40 days.   The effect of the concentration of 4-chloroaniline on the susceptibility to degradation may be reflected in the activity of two different kinds of organisms: those tolerant to HgCl2 toxicity active at a higher concentration (5,000 ƒÝg/g soil) and those susceptible to HgCl2 toxicity active at a lower concentration (5 and 100ƒÝg/g soil).   4-Chlorophenol itself is a microbial inhibitor at a high  concentration.   Only small amount of 14C in 14C-containing compounds was released at 5,000 ƒÝg/g soil of 4-chlorophenol until  40 dsys incubation when compared to the 5 and 100 ƒÝg/g soil of 4-chlorophenol added.   4-Chlorophenol was more susceptible to microbial degradation than 4-chloroaniline.

Key  Words:   dissipation; 4-chloroaniline; 4-chlorophenol; soil