Effects of nitrogen and phosphorus concentrations on the bioaccumulation of polybrominated diphenyl ethers by Prorocentrum donghaiense

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• 作者：Chao Chai^a ; ^{chaichao1999@126.com} ; Xundong Yin^a ; Wei Ge^b ; Jinye Wang^c
• 关键词：nitrogen ; phosphorus ; bioaccumulation ; polybrominated diphenyl ethers ; Prorocentrum donghaiense
• 刊名：Journal of Environmental Sciences
• 出版年：2013
• 出版时间：1 February, 2013
• 年：2013
• 卷：25
• 期：2
• 页码：376-385
• 全文大小：190 K

文摘

The growth, cellular total lipids, bioaccumulation amount, and bioaccumulation factors (BAFs) of 2,4,4¡ä-tribromodiphenyl ether (BDE28), 2,2¡ä,4,4¡ä-tetrabromodiphenyl ether (BDE47), and 2,2¡ä,4,4¡ä,5-pentabromodiphenyl ether (BDE99) in a semi-continuous culture of Prorocentrum donghaiense were studied in relation to nitrate (0, 128, and 512 ¦Ìmol/L) and phosphate (0, 8, and 32 ¦Ìmol/L) concentrations. The BDE28, BDE47, and BDE99 content per cell under 0 ¦Ìmol N/L were 3.77 ¡Á 10^?6, 3.95 ¡Á 10^?6, and 4.32 ¡Á 10^?6 ng/cell, respectively, which were significantly higher than those under 128 and 512 ¦Ìmol N/L. A nearly 5-fold increase in polybrominated diphenyl ether (PBDE) content per algal cell was found between 0 and 8 ¦Ìmol P/L and between 8 and 32 ¦Ìmol P/L. With increasing N and P concentrations, the PBDE content per volume of algal culture and the accumulation percentage of available PBDEs declined slightly. The BAFs for the PBDEs based on lipids showed that the logBAF_lip under 0 ¦Ìmol N/L was higher than those under 128 and 512 ¦Ìmol N/L. The logBAF_lip under 0 ¦Ìmol P/L was higher than that under 8 ¦Ìmol P/L but lower than that under 32 ¦Ìmol P/L. Correlation analysis indicated a significant negative correlation between nutrient concentration and cellular total lipids, as well as the PBDE content per cell. The results indicate that different N and P concentrations change the total lipids content of P. donghaiense, thereby resulting in varying PBDE accumulation.