4.7 Article

New insights into thermal desorption remediation of pyrene-contaminated soil based on an optimized numerical model

期刊

JOURNAL OF HAZARDOUS MATERIALS
卷 461, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.jhazmat.2023.132687

关键词

Polycyclic aromatic hydrocarbons; Pyrene; Thermal desorption; Optimized numerical model

向作者/读者索取更多资源

This study examined the factors affecting the desorption efficiency of pyrene by thermal desorption (TD) and developed an optimal numerical model based on soil experiments. The results showed that temperature and time promoted the desorption of pyrene, while water and organic matter had the opposite effect. Adjusting the soil-water ratio maximized the desorption rate of pyrene.
Thermal desorption (TD) is known as an effective technique to remediate PAHs-contaminated sites. However, effectively removing PAHs using TD while saving time, and energy, and minimizing soil damage remains a challenge. In this study, we examined the combined effects of various factors on the removal efficiency of pyrene (PYR) by TD and developed an optimal numerical model based on conducting a series of soil experiments. The results showed that temperature (T) and time (t) promoted the desorption of PYR, while water (Sw) and organic matter (fom) were just the opposite. Besides, water and organic matter had a synergistic effect proportionally. It was found that adjusting the soil-water ratio (which can be controlled by organic matter) maximized the desorption rate of PYR. An ideal Sw/fom 1.56 and a minimized recommended temperature (173 degrees C) were pro-posed based on the model. Finally, the efficacy of the optimized scheme was validated in real-world site soil. These findings not only mechanistically revealed the desorption behavior of PYR under the influence of various factors, but also provided an optimized scheme for efficiently removing PAHs using TD, thereby accelerating the remediation process and reducing energy consumption. The modeling ideas and conclusions obtained may be applicable to other PAHs, guiding the effective remediation of PAHs-polluted sites.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据