Bare researches about the absorption and translocation of Hexachlorobutadiene (HCBD) in plants were carried out. Plants, as the first trophic level in food chains, play an essential role in the biogeochemical cycle of persistent organic chemicals. In this work, the behavior of HCBD in pumpkin seedlings was studied through in-lab hydroponic exposure experiments. Because of the strong tendency of HCBD escaping from water to the air, exposure solution was renewed every day to maintain the exposure concentration. After fifteen days’ exposure, pumpkin roots linearly accumulated a great amount of HCBD with concentration of 116286.8 ng/g dry weight (dw). HCBD was taken up by pumpkin roots and translocated to upper shoots at a slight rate. Pumpkin seedlings can also absorb HCBD from the air, which was proved with detection of HCBD in leaves, stems, roots and hydroponic solutions in blank controls at the concentrations range of 3.0-6.6 ng/g, 5.1-14.6 ng/g, 7.0-15.3 ng/g and 0.024-0.049 ng/mL, respectively. No dechlorination products were found. However, other biotransformation products might exist according to the results of mass balance.

Hexachlorobutadiene (HCBD) in pumpkin seedlings after hydroponic exposure

252nd National Meeting (2016)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.