Environ Technol. 2014 Sep-Oct;35(17-20):2280-8. doi: 10.1080/09593330.2014.902109.
In this study, the remediation of diesel-polluted soils was investigated by simulating an ex situ microwave (MW) heating treatment under different conditions, including soil moisture, operating power and heating duration. Based on experimental data, a technical, energy and economic assessment for the optimization of full-scale remediation activities was carried out. Main results show that the operating power applied significantly influences the contaminant removal kinetics and the moisture content in soil has a major effect on the final temperature reachable during MW heating. The first-order kinetic model showed an excellent correlation (r2 > 0.976) with the experimental data for residual concentration at all operating powers and for all soil moistures tested. Excellent contaminant removal values up to 94.8% were observed for wet soils at power higher than 600 W for heating duration longer than 30 min. The use of MW heating with respect to a conventional ex situ thermal desorption treatment could significantly decrease the energy consumption needed for the removal of hydrocarbon contaminants from soils. Therefore, the MW treatment could represent a suitable cost-effective alternative to the conventional thermal treatment for the remediation of hydrocarbon-polluted soil.
本研究通过模拟不同条件下的原位微波（MW）加热处理，研究了柴油污染土壤的修复。这些条件包括土壤湿度、运行功率和加热持续时间。基于实验数据，对优化全规模修复活动进行了技术、能源和经济评估。主要结果表明，所施加的运行功率显著影响污染物去除动力学，而土壤中的水分含量对 MW 加热过程中可达到的最终温度有重大影响。在所有操作功率和所有测试土壤湿度下，一阶动力学模型均与实验数据具有极好的相关性（r2>0.976），适用于残留浓度。在高于 600 W 的功率下，加热持续时间超过 30 分钟，可观察到湿土中污染物去除率高达 94.8%。与传统的异位热解吸处理相比，MW 加热可显著降低从土壤中去除碳氢化合物污染物所需的能源消耗。因此，MW 处理可能是修复碳氢化合物污染土壤的一种具有成本效益的替代传统热处理的方法。
