研究报告
吴非,陈谷汎,林伟翰,张育祯,彭彦彬.包覆型纳米零价铁活化过硫酸处理柴油污染土壤[J].环境科学学报,2016,36(7):2589-2595
包覆型纳米零价铁活化过硫酸处理柴油污染土壤
- Remediation of diesel-contaminated soil using coated nano zero valent iron/sodium peroxydisulfate system
- 基金项目:广州珠江新星项目(No.B2140720)
- 吴非
- 华南理工大学环境与能源学院, 广州 510006
- 陈谷汎
- 暨南国际大学土木工程学系, 南投 54561
- 林伟翰
- 暨南国际大学土木工程学系, 南投 54561
- 张育祯
- 暨南国际大学土木工程学系, 南投 54561
- 彭彦彬
- 1. 华南理工大学环境与能源学院, 广州 510006;2. 东海大学环境科学与工程学系, 台中 40704
- 摘要:采用Tween-20作为包覆材料对纳米零价铁(nZVI)进行改性(T-nZVI),并利用T-nZVI活化过硫酸盐(PS)降解柴油,同时与未改性纳米零价铁活化过硫酸盐体系(nZVI/PS)进行对比。结果显示,在nZVI/PS体系中,柴油降解率随着nZVI及PS用量的增加而增加。在T-nZVI/PS体系中,反应90 d后,柴油最大降解率为78%。与nZVI/PS体系相比,T-nZVI/PS体系所有组别的柴油降解率均有所提升,但提升幅度不大。同时对T-nZVI活化PS的机理进行了推测。
- Abstract:In this study, Tween20 was chosen to coat nano zero valent iron (T-nZVI). The feasibility of remediating diesel-contaminated soil using persulfate(PS) activated by T-nZVI and nZVI was then investigated. It was observed that larger amount of T-nZVI favored PS decomposition and diesel degradation. The maximum degradation efficiency of diesel was 78% within 90 days in the T-nZVI system. Compared with the nZVI system, the degradation efficiency of diesel was slightly higher in the T-nZVI system. Possible mechanism of persulfate activation by T-nZVI was inferred based on the analysis data.
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