Field Testing of Novel Technologies for Restoring Challenging Contaminated Sites

修复具有挑战性的污染场地的新技术的现场测试

• 批准号: 530665-2018
• 负责人: Gerhard, Jason
• 金额: $ 6.02万
• 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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697978
• 关键词: Field; Testing; Novel; Technologies; Restoring

Cleaning up contaminated sites in Canada is a significant challenge, in part due to the limited cost effective technologies that can efficiently reduce contamination to safe levels. This is a particular challenge when impermeable soils, such as clay and silts, are contaminated. The use of nanoscale iron for remediation of contaminated sites has received significant attention in part due to the ability of nZVI to rapidly transform many contaminants in controlled laboratory experiments. One problem that has hampered the widespread implementation of nanoiron is its relatively short reactive lifespan. To overcome this problem the project team has developed a new nanoiron technology whereby they modify the nanioron surface through sulfurization, thereby increasing the reactive lifespan to greater than a year in laboratory experiments. Another promising treatment technology is the use of electrokinetics to move amendments into impermeable soils where they can react to degrade contaminants in the ground. Similar to the sulfidized nanoiron technology the project team has developed this technology in the laboratory and achieved outstanding results. This study proposes to trial these two technologies in the field to further help bring these very promising treatment technologies to widespread field application. This field study will conducted at Dow Chemical's Sarnia, ON facility with the strong support of Jacobs, Geosyntec and Arcadis. Dow Chemical owns a number of locations in Canada where the subsurface has been impacted by chlorinated solvents. The development of innovative remediation alternatives is a key part of their environmental stewardship plan. CH2MHill, Geosyntec and Arcadis are keenly aware of the contamination challenges that face many of their clients. The application of nanoiron and electrokinetics has the potential to meet many of these challenges.

在加拿大，清理受污染的场地是一项重大挑战，部分原因是能够有效地将污染降低到安全水平的成本效益技术有限。当粘土和淤泥等不透水土壤受到污染时，这是一个特别的挑战。纳米级铁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迅速转化许多污染物。阻碍纳米铁广泛应用的一个问题是其相对较短的反应寿命。为了克服这个问题，项目团队开发了一种新的纳米铁技术，他们通过硫化来修饰纳米铁表面，从而在实验室实验中将反应寿命延长到一年以上。另一种有前途的处理技术是利用电动力学将改良剂移动到不透水的土壤中，在那里它们可以反应降解地面上的污染物。与硫化纳米铁技术类似，项目组在实验室开发了该技术，并取得了优异的成果。本研究建议在现场试验这两种技术，以进一步帮助将这些非常有前途的处理技术广泛应用于现场。在Jacobs、Geosyntec和Arcadis的大力支持下，该实地研究将在陶氏化学位于安森那州萨尼亚的工厂进行。陶氏化学公司在加拿大拥有许多地下受到氯化溶剂影响的地点。开发创新的补救方案是他们环境管理计划的关键部分。CH2MHill、Geosyntec和Arcadis敏锐地意识到许多客户面临的污染挑战。纳米铁和电动力学的应用有可能应对这些挑战。