Chemical Oxidation Treatment End-Points for Soil and Groundwater Remediation

受污染的土地(所谓的棕地)对人类和生态系统健康构成威胁，并阻碍城市集约化，损害当地经济。原位化学氧化(ISCO)已成为一种具有成本效益的污染场地修复技术。高锰酸盐和过氧化氢是两种广泛使用的水溶液氧化剂，最近过硫酸盐得到了普及。补救团体在Isco的许多方面都有丰富的经验；然而，仍有许多重要的领域需要发现和创新。 这项研究提案的总体目标是确定存在多组分非水相液体(NAPL)的地下系统的ISCO处理的补救终点。虽然以前的研究主要集中在溶解相有机化合物的反应性上，但拟议的研究将解决多组分NAPLS可被化学氧化剂降解的程度。对各种化学氧化剂系统和NAPL混合物的这些终点进行量化，将提供有关潜在处理效果和实现处理目标所需的相关补救系统生命周期的关键信息。 为实现这一目标，将在适当的数据分析和计算模型的支持下进行各种小规模和实地实验。这些实验将用于评估汽油系列有机物、柴油系列有机物和人造气体工厂NAPLS的化学氧化降解速度和程度。将使用新的方法来改善选定系统的治疗终点。拟议的努力将有助于基础研究，产生技术创新，并培养高素质的人才。通过促进开发和提高对一项技术的理解，可以加速加拿大棕地遗址的再开发，将给加拿大经济带来直接好处。

Contaminated lands (so-called brownfields) pose a threat to human and ecosystem health and are an impediment to urban intensification which harms local economies. In situ chemical oxidation (ISCO) has emerged as a technology with the potential for cost effective remediation of contaminated sites. Permanganate and peroxide are two aqueous oxidants which have been widely used and recently persulfate has gained popularity. The remediation community has significant experience with many aspects of ISCO; however, there remain significant areas for discovery and innovation. The overall objective of this research proposal is to determine remediation end-points for the ISCO treatment of subsurface systems where multicomponent non-aqueous phase liquids (NAPLs) are present. While previous research has focused on the reactivity of dissolved phase organic compounds, the proposed research will address the degree to which multicomponent NAPLs can be degraded by chemical oxidants. Quantification of these end-points for various chemical oxidant systems and NAPL mixtures will provide key information on potential treatment effectiveness and the associated remedial system life cycle required to meet treatment goals. To satisfy this objective a variety of bench-scale and field experiments supported by appropriate data analyses and computational modelling will be executed. These experiments will be used to evaluate the rate and extent of degradation of gasoline range organics, diesel range organics and manufactured gas plant NAPLs by chemical oxidation. Novel methods will be used to improve treatment end-point for selected systems. The proposed effort will contribute essential research, generate technological innovation, and train highly qualified personnel. Direct benefits to the Canadian economy will occur by fostering the development and improved understanding of a technology that can accelerate the re-development of brownfield sites in Canada.