流水中における内分泌撹乱化学物質の沈水植物による浄化

抄録

Phytoremediation which means a technology that vegetation absorbs and removes chemical compounds is noticed for its possibility of applications. In this study, the absorption experiment of 17β-estraziol (E2) and bisphenol A (BPA), which are called Endocrine disrupting chemicals, was performed using Egeria densa in order to investigate how E2 and BPA are absorbed by vegetation in running water. A field survey in the Nikaryo-yosui was carried out in order to investigate whether submerged vegetation in a river can apply to the phytoremediation of Endocrine disrupting chemicals. The absorption experiment revealed that E2 and BPA adhered to the surface of Egeria densa in a few hours and they were absorbed there into the body of Egeria densa after 24 hours passed. From the results of field survey, the reduction rate of E2 and BPA in the vegetated zone was larger than that in the zone without vegetation. Moreover Egeria densa in a river also absorbed E2 and BPA, and possibly removed under the condition which was much lower concentration compared with the absorption experiment.