过硫酸钠在土壤修复中的主要应用是利用其强氧化性能来处理受污染的土壤。具体来说，过硫酸钠溶于水产生的过硫酸根离子是一种稳定的强氧化剂，可以用于有害物质的氧化降解。

The main application of sodium persulfate in soil remediation is to utilize its strong oxidizing properties to treat contaminated soil. Specifically, the persulfate ion produced by sodium persulfate dissolved in water is a stable and strong oxidant that can be used for the oxidative degradation of harmful substances.

这种处理方法对于去除土壤中的石油类污染物具有特别重要的意义。然而，在实际应用过硫酸钠进行土壤修复时，还需要考虑多种因素，包括土壤类型、污染物的种类和浓度、处理时间和条件等。

This treatment method is of particular significance for removing petroleum pollutants from soil. However, when applying sodium persulfate for soil remediation in practice, multiple factors need to be considered, including soil type, types and concentrations of pollutants, treatment time and conditions, etc.

因此，在具体使用过硫酸钠进行土壤修复前，需要进行详细的研究和实验，以确定最佳的处理方法和条件。同时，还需要注意处理过程中可能产生的副作用和对环境的影响，以确保土壤修复的效果和可持续性。

Therefore, before using sodium persulfate for soil remediation, detailed research and experiments are needed to determine the optimal treatment method and conditions. At the same time, attention should also be paid to the potential side effects and environmental impacts that may arise during the treatment process to ensure the effectiveness and sustainability of soil remediation.