Remediation in Challenging Environments: A New Approach for Accelerating Bioremediation in Cold Climates

具有挑战性的环境中的修复：加速寒冷气候下生物修复的新方法

• 批准号: RGPIN-2014-05902
• 负责人: Chang, WonJae
• 金额: $ 1.75万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=588689
• 关键词: Remediation; Challenging; Environments; New; Approach

In Canada, the Federal Contaminated Sites Inventory lists more than 21,000 sites that are contaminated or suspected of being contaminated. In about 80% of the total number of contaminated sites, it is the soil environments, including surface and subsurface soils, sediments and groundwater, which are contaminated. The most frequently identified contaminants at these sites are petroleum hydrocarbons, which are non-aqueous phase liquids that include toxic and carcinogenic organic compounds. In many of the contaminated sites in Canada, hydrocarbon contamination exists in cold-climate soil environments. The ground in cold regions remains semi-frozen and frozen for 6 to 9 months of the year, which greatly shortens the active treatment period compared to temperate regions. In cold regions, current remedial strategies and on-site activities, regardless of the type of remediation technology, have often been designed to be effective only during the summer months (only 2 to 4 months per year). Considering the large number of hydrocarbon-impacted sites and the environmental risks associated with toxic and carcinogenic hydrocarbon fractions, there is a strong demand for new research and development concerning more efficient, more cost-effective, and low-energy remediation technologies for hydrocarbon-impacted soil environments in cold climates. My recent research shed light on how to overcome the current limitations of site remediation technologies applied to cold-climate sites. In the Discovery research, I will focus on how to accelerate the bioremediation during short summers and how to extend the bioremediation to non-summer months. My research program is divided into three themes: 1) New Approach for Assessing Bioremediation Feasibility and Selecting an Effective Strategy; 2) Accelerated Bioremediation during Short Summers; and 3) Extended Long-Term Bioremediation during Cold Months. The associated short-term objectives are to: 1. Quantitatively explain how bioaccessible microsites in soil particles are related to the enhancement of biodegradation activity and to the optimization of unfrozen water characteristics; 2. Develop a freeze-thaw induced Separation–Dissolution–Biodegradation (SDB) ex situ treatment to be applied during short summers in cold climates; 3. Enhance, measure, and predict microbial activity related to hydrocarbon biodegradation during non-summer months. My research will be expanded in the long-term to produce ‘engineering products’. A larger-scale statistical decision-making system for bioremediation that can be linked to the Federal Contaminated Sites Inventory will be developed using the results from Theme 1. The SDB process developed in Theme 2 will be tested in scale-up systems in the field and will be considered a patentable technology. From Theme 3, the developed microbial activity model will be expanded to become an effective tool for climate change-adaptive remediation design and management for mine wastes buried in seasonally freezing and thawing or frozen ground. The expected outcomes of the research into expanding decision-making models, remediation strategies, and management principles to include periods beyond short summers will clearly benefit the Canadian public, provincial and federal contaminated site programs, and the energy, mining, and remediation industries. Overall, the proposed research related to the environmental sustainability of cold regions impacted by intensified natural resource development and industrial activities will contribute to meeting Canada’s needs today and become one of the most important research fields for Canada’s future. The research is thus on the frontline of Canada’s innovation for sustainable development and environmental protection.

在加拿大，被污染的地点列出了21,000多个被污染的地点。该地点的污染物是石油，它们是非水液，包括有毒和致癌的有机化合物。 在许多冷气候土壤中。补救技术仅在夏季（每年只有2至4个月）才能生效。 考虑到大量碳氢化合物侵入地点以及与有毒和致癌的碳氢化合物分数相关的环境风险，这是对新研发和开发的强烈需求，更有效，更具成本效益，更具成本效益和低能量技术气候中的环境。 我最近的研究揭示了如何运用现场技术，将其应用于寒冷的地点，我将重点介绍如何进行演出。到脚趾到非夏季的月份。几个月。 1。定量解释土壤颗粒中的生物接近微粒如何与增强的果实作用和未含水特征的象征有关； 2。开发冻融诱导的分离 - 生物降解（SDB）的原位处理； 3.在非夏季蒙特中增强，测量和预测与烃生物降解相关的微生物活性。 我的研究将长期扩展以生产。该领域将被视为可专利的技术。 CATO扩大决策的预期结果短暂夏季Willy Willy受益于加拿大公众，省和联邦受污染的现场计划以及能源和补救ES。 总体而言，拟议的研究与自然资源开发影响的寒冷军团的环境可持续性有关，即当今的工业活动将成为加拿大最重要的研究领域之一。保护。