In this study, zero-valent iron-aluminum (NZVI-Al) bimetallic particles formed from Al(0) core and nano-scale Fe(0) shell were synthesized for highly effective U(VI) removal. The NZVI-Al bimetallic particles were characterized by SEM-EDS, FT-IR, XRD, and XPS. Batch experiment demonstrated that the reactivity of NZVI-Al bimetal was greatly improved relative to single zero-valent iron or aluminum. The enhanced U(VI) removal capacity up to 575 mg/g (but not to saturation at pH 5.0 and T = 30 °C) could be attributed to stronger reduction ability of NZVI-Al from the galvanic cell effect. XRD and XPS results indicated that U(VI) was immobilized via the reduction as UO_2(s) and surface sorption as U(VI). The NZVI-Al bimetallic particles are promising for further testing to achieve the rapid and effective removal of U(VI) from polluted water.

在这项研究中，合成了由Al（0）核和纳米级Fe（0）壳形成的零价铁铝（NZVI-Al）双金属颗粒，可高效去除U（VI）。通过SEM-EDS，FT-IR，XRD和XPS对NZVI-Al双金属颗粒进行了表征。批处理实验表明，相对于单一的零价铁或铝，NZVI-Al双金属的反应性得到了极大的提高。高达575 mg / g的U（VI）去除能力增强（但不是在pH 5.0和T  = 30°C时达到饱和）可以归因于原电池效应对NZVI-Al的更强还原能力。XRD和XPS结果表明U（VI）通过还原固定为UO _2（s）和表面吸附为U（VI）。NZVI-Al双金属颗粒有望用于进一步测试，以实现快速，有效地从污水中去除U（VI）。