Assessment of nZVI synthesis and mobility at a field trial

纳米级零价铁（nZVI）用于污染场地的修复受到了极大的关注，部分原因是nZVI能够在受控的实验室实验中快速转化污染物。阻碍nZVI广泛应用的一个问题是地下流动性差。由于强大的吸引力，nZVI倾向于凝聚成微米大小的颗粒，限制了多孔介质中的迁移率。为了克服这个问题，nZVI颗粒可以通过涂上聚合物来稳定，使它们在溶液中稳定数天。在我们实验室进行的柱状实验中，聚合物稳定的nZVI表明，这种nZVI在地下环境中具有很强的流动性。在现场应用nZVI的初步研究中，由于缺乏或配方不佳的聚合物，流动性有限

The use of nanoscale zero valent iron (nZVI) for remediation of contaminated sites has received significant attention in part due to the ability of nZVI to rapidly transform contaminants in controlled laboratory experiments. One problem that has hampered the widespread implementation of nZVI is poor subsurface mobility. Due to strong attractive forces, nZVI tends to agglomerate to micron size particles, limiting mobility in porous media. To overcome this problem nZVI particles may be stabilized by coating them with polymers making them stable in solution for days. Column experiments conducted in our laboratories, with polymer stabilized nZVI, indicate that this nZVI should be quite mobile in subsurface environments. Pilot studies that have applied nZVI at the field scale have reported limited mobility due to lack of or poorly formulated polymer