检验表面活性剂溶液对受污染土壤中石油的解吸效果和机理

IF 2.8 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES
Meixia Gu, Xiaoshuang Yin, Xiaoning Feng, Nan Shi, Wei Zhu, Shuhai Guo, Min Li, Bo Wu, Gang Li, Xingshun Cong, Bin Lou, Fushan Wen, Dong Liu
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引用次数: 0

摘要

目的 研究石油污染土壤(PCS)在表面活性剂溶液(SAA-solution)中的石油解吸效果及机理。方法 采用正交实验系统分析了SAA-solution清洗PCS的解吸效果,并通过动力学和热力学研究进一步探讨了PCS表面的石油解吸机理。结果表明,随着 PCS 粒径和 PCS 老化时间的增加,石油脱附效率(Re)逐渐降低。在最佳条件下,最高石油去除率为 82.13%。随后的傅立叶变换红外光谱和石油成分分析表明,轻质石油成分很容易从 PCS 中去除,而重质石油成分则限制了石油的解吸。动力学研究表明,伪一阶动力学模型很好地描述了石油解吸过程,且解吸速率随 PCS 粒径的减小而增加。同时,Langmuir 等温线模型很好地描述了石油解吸的平衡,并以化学机制进行。热力学研究表明,PCS 的石油解吸是一个可行的、自发的内热过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Inspection for the desorption effect and mechanism of petroleum from contaminated soil in surfactant solution

Inspection for the desorption effect and mechanism of petroleum from contaminated soil in surfactant solution

Purpose

In order to investigate the desorption effect and mechanism of petroleum from petroleum contaminated soil (PCS) in surfactant solution (SAA-solution).

Method

In this study, the desorption effect of SAA-solution cleaning of PCS was systematically analyzed by using orthogonal experiments. In addition, the petroleum mechanism of desorption from the PCS surface was further explored by kinetic and thermodynamic studies.

Results

The results indicated that the petroleum removal efficiency (Re) gradually decreased with the increase of PCS particle size and PCS aging time. The highest petroleum Re was 82.13% under optimum conditions. Subsequently, FT-IR and petroleum component analysis showed the petroleum light components were easily removed from PCS, while the petroleum heavy components limited the desorption of petroleum. The kinetic studies revealed that the petroleum desorption was well depicted by the pseudo-first-order kinetic model, and the desorption rate increased with the decrease of PCS particle size. Meanwhile, the petroleum desorption equilibrium was well described by the Langmuir isotherm model and proceeded by a chemical mechanism. The thermodynamic studies demonstrated that the petroleum desorption from PCS was a viable, spontaneous, and endothermic process.

Conclusion

The study provided theoretical guidance to apply SAA-solution cleaning industrial PCS.

Graphical Abstract

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来源期刊
Journal of Soils and Sediments
Journal of Soils and Sediments 环境科学-土壤科学
CiteScore
7.00
自引率
5.60%
发文量
256
审稿时长
3.5 months
期刊介绍: The Journal of Soils and Sediments (JSS) is devoted to soils and sediments; it deals with contaminated, intact and disturbed soils and sediments. JSS explores both the common aspects and the differences between these two environmental compartments. Inter-linkages at the catchment scale and with the Earth’s system (inter-compartment) are an important topic in JSS. The range of research coverage includes the effects of disturbances and contamination; research, strategies and technologies for prediction, prevention, and protection; identification and characterization; treatment, remediation and reuse; risk assessment and management; creation and implementation of quality standards; international regulation and legislation.
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