Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, South Korea.
Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, South Korea; Department of Earth and Environmental Sciences, Korea University, Seoul, 136-701, South Korea.
Chemosphere. 2022 Mar;290:133392. doi: 10.1016/j.chemosphere.2021.133392. Epub 2021 Dec 21.
Identifying the cause of inconsistent landfarming efficacy is critical to designing optimal remedial strategies for petroleum-contaminated sites. We assessed contaminated soils collected from two former military bases in South Korea to better understand the role and influence of different factors. Landfarming remediation was simulated in the laboratory by applying comparable practices (such as tillage and bioaugmentation) and the relevant mechanism was examined. We then systematically examined potential factors affecting petroleum-removal efficacy, including the content of fine soil particles, the initial concentration and composition of petroleum contaminants, and the degree of soil-contaminant interaction. The distribution range of total petroleum hydrocarbons (TPHs) and the size of unresolved complex mixture (UCM) found in gas chromatography data showed that petroleum composed of TPHs with lower carbon numbers and having smaller size of UCM could be treated more effectively by landfarming. Incorporating the evaluation of the distribution range and UCM properties of petroleum, rather than simply considering its total concentration, is a more accurate and efficient method for determining the site-specific suitability of landfarming as a remedial option, as well as for assessing the necessity of supplementary processes.
确定土地耕作效果不一致的原因对于设计石油污染场地的最佳补救策略至关重要。我们评估了从韩国两个前军事基地收集的受污染土壤，以更好地了解不同因素的作用和影响。通过应用类似的实践（如耕作和生物强化）在实验室中模拟土地耕作修复，并检查了相关机制。然后，我们系统地研究了影响石油去除效果的潜在因素，包括细土颗粒的含量、石油污染物的初始浓度和组成，以及土壤污染物相互作用的程度。气相色谱数据中总石油烃（TPH）的分布范围和未解析复杂混合物（UCM）的大小表明，由碳数较低且 UCM 较小的 TPH 组成的石油可以通过土地耕作更有效地处理。与仅考虑其总浓度相比，评估石油的分布范围和 UCM 特性是一种更准确、更有效的方法，可以确定土地耕作作为补救选择的特定场地适用性，以及评估补充工艺的必要性。
