FATE OF 1,2,4-TRICHLOROBENZENE (1,2,4-TCB) IN SOIL-RICE PADDY SYSTEM

Uptake of 1,2,4-trichlorobenzene (1,2,4-TCB) by rice paddy was measure d under pot cultivation condition. Concentrations of 1,2,4-TCB in vari ous tissues of rice paddy were found to correlate excellently with the application levels of the chemical at cropping and residual levels at harvest, implying the potential risk of accumulation of 1,2,4-TCB in rice paddy grown in soil containing high concentration of the chemical . In the study, root uptake of 1,2,4-TCB rather than atmospheric entra nce into rice paddy was observed. After one growing season, the residu e of 1,2,4-TCB in soil were low, nevertheless, proportional to-the ini tial concentration. Copyright (C) 1996 Elsevier Science Ltd