유기질 퇴비 시비에 따른 토양 중 polychlorinated biphenyls의 작물 흡수 이행

다국어 초록 (Multilingual Abstract)

BACKGROUND: Translocations of organic compounds from soil to crops are dependent on many physicochemical properties including soil organic compounds, mineralogy, climate, and plant species, among which the organic contents were one of the most important factors determining the transfer ratio of organic pollutants from agricultural soils to common crops. Bioaccumulation through translocation is an important process for the evaluation of crop safety cultivated in contaminated soils METHODS AND RESULTS: Several PCB derivatives were prepared by chemical syntheses and applied on upland soils with different application rates of organic fertilizer. Concentrations of PCBs in soil and carrot were analyzed with GC-MS. In general, the translocation ratio of PCBs from soil to carrot was inversely related to the organic contents. For example, the ratios of PCB-126 in low-, medium-, and high-organic content soils were 0.17, 0.12, and 0.08, respectively. In addition, tranlocation ratios were also inversely related to the hydrophobicities of contaminants. Lipophilic PCBs were gradually accumulated in carrots till the end of experimental periods, while accumulation of polar analogues reached a maximum at 40-60 days of cultivation. CONCLUSION: Translocation of organic pollutants were negatively correlated with the soil organic contents. Application of organic fertilizers inhibit the accumulation of PCBs on carrot, which were well coincided with literature results. Additionally, it was found that accumulations of lipophilic persistant contaminants including highly chlorinated PCB analogues were very slow.

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