Assessment of nZVI synthesis and mobility at a field trial

现场试验中 nZVI 合成和迁移率的评估

• 批准号: 403401-2010
• 负责人: OCarroll, Denis
• 金额: $ 0.47万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=529726
• 关键词: Assessment; nZVI; synthesis; mobility; field

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

使用纳米零价铁（nZVI）修复污染场地已收到显着的关注，部分原因是由于nZVI在受控实验室实验中快速转化污染物的能力。阻碍nZVI广泛实施的一个问题是地下流动性差。由于强吸引力，nZVI倾向于聚集成微米尺寸的颗粒，限制了多孔介质中的流动性。为了克服这个问题，可以通过用聚合物涂覆nZVI颗粒来稳定它们，使它们在溶液中稳定数天。在我们的实验室进行的柱实验，与聚合物稳定的nZVI，表明该nZVI应该是相当移动的在地下环境。在现场规模应用nZVI的试点研究报告称，由于缺乏或配制不良的聚合物，流动性有限