In remote communities in the Canadian Arctic, petroleum hydrocarbons supply most household energy needs. Their transportation and use frequently incurs small volume spills in populated areas. The remediation method that is currently used when such spills affect the soil under northern villages’ stilted buildings is expensive and not well suited to local conditions. Here, we review local constraints and environmental considerations and select the best remediation technology for this context: in situ chemical oxidation, involving sodium persulfate (SPS) alkali activated with calcium peroxide (CP). Activated SPS presents a good reactivity and amenability to compounds found in diesel. Its high persistence allows a gradual contaminant degradation, regulating heat release from exothermic reactions associated with the oxidative reactions. CP provides suitable alkali activation, acts itself as an oxidant and provides O₂ into the subsurface, which may favour a final smoothing bioremediation step. The SPS properties and the contaminant amenability mean that diesel is removed relatively efficiently, while the subsurface temperature increase is limited, thus preserving the residual permafrost. The solid form of the chemicals offers safe and economic transportation and operation, along with versatility regarding the preparation and distribution of the oxidizing solution into the subsurface. Finally, the oxidation by-products resulting from this method are not considered to be environmentally problematic in the context of the application, and they can be partly confined during the treatment.

在加拿大北极地区的偏远社区，石油碳氢化合物满足了大部分家庭的能源需求。它们的运输和使用经常会在人口稠密地区造成少量泄漏。当此类泄漏物影响到北方村庄吊脚楼下的土壤时，目前采用的修复方法成本高昂且不适合当地条件。在这里，我们回顾了当地的限制和环境因素，并选择了最适合这种情况的修复技术：原位化学氧化，涉及用过氧化钙 (CP) 激活的过硫酸钠 (SPS) 碱。活化的 SPS 对柴油中的化合物具有良好的反应性和适应性。它的高持久性允许污染物逐渐降解，调节与氧化反应相关的放热反应的热量释放。₂ 进入地下，这可能有利于最终的平滑生物修复步骤。SPS 的特性和污染物的适应性意味着柴油被相对有效地去除，而地下温度的增加是有限的，从而保护了残留的永久冻土。化学品的固体形式提供安全和经济的运输和操作，以及在氧化溶液的制备和分配到地下方面的多功能性。最后，这种方法产生的氧化副产物在应用的背景下不被认为是环境问题，并且它们可以在处理过程中被部分限制。