黄菖蒲与美人蕉对水体中双酚A的去除效果研究

The Efficiency of Iris Pseudacorus and Canna indica on the Removal of Bisphenol A from Hydroponic Media

  • 摘要: 通过温室水培模拟试验,采用HPLC-MS测定不同时期溶液中双酚A的残留和植物根和叶中双酚A的含量,分析黄菖蒲和美人蕉2种景观湿地植物对双酚A的去除效果。结果表明:黄菖蒲和美人蕉对水中的双酚A去除有显著的促进作用(P<0.05),与对照相比,种植黄菖蒲和美人蕉后,溶液中双酚A的降解半衰期(T1/2)分别缩短2.70 d和2.11 d。处理后第3天,黄菖蒲和美人蕉对双酚A的去除率分别比对照提高了57%和47%;第5天,分别提高了42%和30%,且80%~90%的初始双酚A均被去除。根据去除动力学方程发现,种植黄菖蒲和美人蕉后99%的双酚A在试验第8天和第12天被去除。通过对植物体内双酚A的残留动态分析表明,第5天,黄菖蒲根中双酚A是叶中的25倍,美人蕉叶中的双酚A是根中的90倍。因此,黄菖蒲对双酚A的植物提取能力极显著强于美人蕉,黄菖蒲对双酚A从根系向叶片的转移能力弱于美人蕉。

     

    Abstract: In this study, the greenhouse water culture simulation experiment was conducted to study the removal effect of bisphenol A from 2 landscape wetland plants of Iris pseudacorus and Canna indica. The residual bisphenol A in the solution and the content of bisphenol A in the roots and leaves in different periods were determined by HPLC-MS. The results showed that I. pseudacorus and C. indica significantly promoted the removal of bisphenol A in water (P<0.05). Compared with the control, the degradation half-life (T1/2) of bisphenol A in the solution was shortened by 2.70 and 2.11 days, respectively, after planting I. pseudacorus and C. indica. On the 3rd day of treatment, the removal rate of bisphenol A by I. pseudacorus and C. indica was increased by 57% and 47%, respectively, and on the 5th day, it was increased by 42% and 30%. On the 5th day of treatment, 80%~90% of the initial bisphenol A was removed. Further studies by removing the kinetic equation revealed that 99% of the bisphenol A in the treatment of the cultivation of I. pseudacorus and C. indica was removed on the 8th and 12th days of the test. The residue dynamics analysis of bisphenol A in plants showed that on the 5th day, the quality of bisphenol A in the roots of I. pseudacorus was 25 times that in the leaves, and the quality of bisphenol A in C. indica leaves was 90 times that in the roots. The plant extracting ability of I. pseudacorus was significantly stronger than that of C. indica and the ability of I. pseudacorus to transfer bisphenol A from root to leaf was weaker than C. indica.

     

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