Abstract:

The residual characteristics of hexachlorocyclohexane(HCH) and hexachlorobenzene(HCB) were discussed based on analyzing the contents of 4 isomers of HCH (α-HCH, β-HCH, γ-HCH and δ-HCH) and HCB in agricultural soils in the central part of Jilin Province. The results showed that the four isomers of HCH were detected at different levels in its soils, of which β-HCH and γ-HCH were its major residues.The average concentration of total HCH was 5.09 ng/g with the range from 0.42 to 44.96 ng/g in its soils.The total HCH residues had no obvious difference in the different soil types within the different soil uses.The ratio of α-HCH to γ-HCH was nearly 1, which indicated that the soil environment in this area had been changed or there might be some new pollution sources.The average concentration of total HCB was 5.51 ng/g in its soils, which the total residual concentration of HCB was lower and the residual level in the paddy fields was higher than that in the glebe fields.

Key words: HCH, HCB, agricultural soil, residue, Jilin Province