Incheon Disaster Prevention Research Center, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Korea.
Department of Civil Engineering, Halla University, 28 Halladae-gil, Wonju-si 26404, Korea.
Int J Environ Res Public Health. 2022 Oct 21;19(20):13710. doi: 10.3390/ijerph192013710.
This study describes the test results to evaluate the impermeability efficiency, according to the total petroleum hydrocarbon (TPH) reaction time of a hybrid liner for preventing the TPH diffusion, and the numerical analysis results, according to the various TPH reaction times of the hybrid liner. The experimental results indicated that the hybrid liner performed effectively as an impermeable material under the condition of a 4 h reaction time between TPH and the hybrid liner. In other words, the permeability of the hybrid liner was lower than 7.64 × 10 cm/s when the reaction time of the TPH and the hybrid liner exceeded 4 h. This means that polynorbornene applied as a reactant becomes completely gelated four hours after it reacts with TPH, demonstrating its applicability as a liner. The numerical analysis results to evaluate the TPH diffusion, according to the hybrid liner-TPH reaction time indicated that the concentration decreased, compared to the initial concentration as the hybrid liner-TPH reaction time increased, regardless of the head-difference and the observation point for all concentration conditions. In addition, the reduction ratio of the concentration, compared to the initial concentration was 99% ~ 100%, when the reaction time of the hybrid liner-TPH was more than 4 h. It was found that the concentration diffusion of TPH reacting with the hybrid liner was decreased when the distance from the hybrid liner and the reaction time of the hybrid liner-TPH were increased. In other words, in the case of a high-TPH condition, the concentration reduction ratio is 12.517.8%, 16.929.7%, depending on the distance ratio (D/L = 0.06, 0.54, 0.94), respectively, when the reaction time of the hybrid liner-TPH is 0 h and 0.5 h, respectively. In the case of medium- and low-TPH conditions, the concentration reduction ratio, according to the distance ratio is 12.0% to 20.8% and 17.0% to 29.8%, respectively. This result means that a numerical analysis model can be used sufficiently to predict the TPH diffusion, according to the distance from the location where the hybrid liner is installed.
本研究描述了评估防渗效率的测试结果，根据混合衬垫阻止总石油烃（TPH）扩散的 TPH 反应时间，以及根据混合衬垫的各种 TPH 反应时间的数值分析结果。实验结果表明，在 TPH 与混合衬垫反应 4 小时的条件下，混合衬垫作为防渗材料有效。换句话说，当 TPH 与混合衬垫的反应时间超过 4 小时时，混合衬垫的渗透率低于 7.64×10cm/s。这意味着作为反应物的聚降冰片烯与 TPH 反应四小时后完全凝胶化，表明其作为衬垫的适用性。根据混合衬垫-TPH 反应时间评估 TPH 扩散的数值分析结果表明，无论头差和所有浓度条件下的观察点如何，随着混合衬垫-TPH 反应时间的增加，浓度都会降低。此外，当混合衬垫-TPH 的反应时间超过 4 小时时，与初始浓度相比，浓度的降低率为 99%100%。研究发现，随着混合衬垫与 TPH 的距离和反应时间的增加，与混合衬垫反应的 TPH 的浓度扩散减少。换句话说，在高 TPH 条件下，当混合衬垫-TPH 的反应时间为 0 小时和 0.5 小时时，距离比（D/L=0.06、0.54、0.94）分别为 12.5%17.8%和 16.9%29.7%，浓度降低率分别为 12.5%17.8%和 16.9%~29.7%。在中低 TPH 条件下，根据距离比，浓度降低率分别为 12.0%至 20.8%和 17.0%至 29.8%。结果表明，根据混合衬垫安装位置与 TPH 扩散的距离，可以充分利用数值分析模型来预测 TPH 扩散。
