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

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。

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.