[en] The distribution of uranium in the plant-microbe symbiotic system-Azolla imbircata was analyzed by scanning electron microscope(SEM) and energy dispersive spectrometer(EDS) hyphenated technique. The results showed that uranium distributed in both fern-Azolla imbricata and microbe-Anabena azollae. The content of uranium in Anabena azollae was slightly higher than that in Azolla imbricata. The fern-Azolla imbricata and microbe-Anabena azollae had a synergistic effect on the process of removing uranium from the water. (authors)