化学
环境修复
环境化学
核化学
污染
生态学
生物
作者
Changyu Li,Yifan Zhu,Ting Zhang,Yongxin Nie,Wenxin Shi,Shiyun Ai
出处
期刊:Chemosphere
[Elsevier]
日期:2022-01-01
卷期号:286: 131603-131603
被引量:16
标识
DOI:10.1016/j.chemosphere.2021.131603
摘要
A promising technology was developed for the remediation of fluoranthene (FLT) contaminated water and soil. Specifically, iron nanoparticles supported on N-doped carbon foam ([email protected]) was synthesized by in-situ impregnation and a unique calcination process using pine cone as the precursor. The obtained [email protected] was used as an activator of potassium peroxymonosulfate (PMS) to degrade FLT in water and soil. According to experimental results, [email protected] had a three-dimensional network structure with a large specific surface area of 249.0 m2 g−1, displaying excellent catalytic performance. The maximum removal efficiency of FLT in water and soil reached 81.83% and 78.12% within 180 min, respectively. After four consecutive degradation cycles, the removal efficiency of FLT in water was still 55%. Electron spin resonance (ESR) measurements showed that hydroxyl radicals (·OH), sulfate radical (SO4−·) and 1O2 were the major reactive oxygen species (ROS). A series of low molecular weight intermediates were generated during the FLT degradation progress, such as C6H6O3 and C3H8O2. The effect of [email protected]/PMS system on the phytotoxicity was evaluated via bioassay based on peas. The results indicated that seed germination rate and root shoot elongation of remediated soil by [email protected]/PMS system were not significantly different from those of noncontaminated soil. This study provided a cost-effective remediation option for PAHs contaminated water and soil.
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