Research On Distribution Of DP In Many Environmental Medium Of Typical Area From Sub-Antarctic

Dechlorane Plus (DP), a kind of persistent organicpollutants,was widely used in electrical cableand plastic shell of electrical appliances as a emerging additive flame retardants. Because of the global distillation, DP was widespead in all the word including the Antarctic. Fiides Peninsuia, a typical area of the Antarctic, was characterized by plant species single, simple food chain and the soil of relatively strong physical process whose climate type belonged to the sub-antarctic maritime climate. To investigate the distribution and behavior of DP in soil, plant, seawater and biota from the food web, samples were collected in Fiides Peninsuia.Using gas chromatography-mass spectrometry, the content of DP in many medium was analyzed. Combined with stable nitrogen isotopes, biomagnification of DP in food web was investigated. Furthermore, the behavior of DP in many medium was researched. The result showed the content of DP with the mean of 0.39 ng/g dw in plant ranged from 0.06-0.76 ng/g dw while the content of DP with the mean of 1.82 ng/g dw in soil varied from 0.47-6.84 ng/g dw. The content of syn-DP in soil and plant was related strongly to that of anti-DP which indicated similar enrich process between syn-DP and anti-DP. In the seawter, the content of DP ranged from 0.12-1.24 ng/L with the mean of 0.50 ng/L and the concentration in aqueous phase was higher than in particle phase. At the same time, the behavior similarity between DP isomers was observed in accordance with the correlation of their concentrations. In the biota from the food web, the content of DP with the mean of 1.74 ng/g lw ranged from 0.25-6.81 ng/g lw and DP isomers had similar enrich process. However, syn-DP had greater enrichment than anti-DP. In the soil-plant system, the enrichment of DP in plant did not depend on the partition between in soil and plant, but the plant uptake of DP. In Antarctic food web, biomagnification of DP was observed. The biomagnification potential of anti-DP was higher than that of syn-DP and the enrichment and biomagnification potential of DP isomers was similar to octa-CBs. In many medium, the order of the enrich similarities of syn-DP and anti-DP was soil< plant<seawater< organism of the food web and the order of fanti was soil< plant< organism of the food web< atmospehere< seawater. The results indicated different behavior of DP in many medium existed and anti-DP was metabolized more steadily than syn-DP in soil.All the results indicated DP is detected in soil, plant, seawater and organism of the food web from Fiides Peninsuia. In the soil-plant system, DP is inclined to deposit in soil, but partition between soil and plant is not obvious. In seawater, the concentration in aqueous phase is higher than in particle phase. In Antarctic food web, biomagnification of DP is observed. The potential of anti-DP is higher than that of syn-DP and the behavior of DP isomers is similar to octa-CBs. Different enrich similarities of DP and fanti show different behavior of DP among many medium which was affacted by physical and chemical properties of DP and the environment of many medium.