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首页> 外文期刊>RSC Advances >Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system
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Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system

机译：使用溶剂/表面活性剂系统有效地修复原油污染土壤

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摘要

Crude oil contaminated soil has been widely recognized to constitute a major environmental issue due its adverse effects on human health and ecological safety. The main objective of this study is to explore the possibility of using an ex situ solvent/surfactant washing technique for the remediation of crude oil-contaminated soil. Three organic solvents (methanol, acetone, and toluene) and one surfactant (AES-D-OA) were employed to form three kinds of solvent/surfactant systems, and utilized to evaluate the desorption performance of crude oil from soil. Natural soil, crude oil-contaminated soil, and after-remediation soil were characterized by SEM, EDX, FT-IR, and contact angle. The ability of solvent/surfactant systems to remove crude oil from soil was determined as a function of solvent polarity, mass ratio of solvent to surfactant, temperature, and ionic strength. The removal of crude oil by the toluene/AES-D-OA system was found to be more effective than the other systems. At a high toluene ratio, more than 97% of crude oil could be removed from contaminated soil. Crude oil removal efficiency was also found to increase with rising temperature or increasing ionic strength appropriately. Experimental results suggested that, compared to conventional surfactant-aided remediation, the combined utilization of surfactant and solvent achieved superior results for crude oil removal because of their similar compositions and structures in terms of aromaticity and polarity.
机译：原油受污染的土壤被广泛认识到，由于其对人体健康和生态安全的不利影响，构成了一个主要的环境问题。本研究的主要目的是探讨使用EX原位溶剂/表面活性剂洗涤技术来修复原油污染土壤的可能性。使用三种有机溶剂（甲醇，丙酮和甲苯）和一种表面活性剂（AES-D-OA）形成三种溶剂/表面活性剂体系，并利用来评估来自土壤的原油的解吸性能。通过SEM，EDX，FT-IR和接触角来表征天然土壤，原油污染土壤和修复后的土壤。溶剂/表面活性剂系统从土壤中除去原油的能力被确定为溶剂极性，溶剂与表面活性剂，温度和离子强度的质量比。发现甲苯/ AES-D-OA系统除去原油，比其他系统更有效。以高甲苯比，可以从污染的土壤中除去97％的原油。还发现原油去除效率随着温度上升或适当增加离子强度而增加。实验结果表明，与常规表面活性剂辅助修复相比，由于其在芳香性和极性方面，表面活性剂和溶剂的合并利用率为原油除去的优异成果。

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  • 来源
    《RSC Advances》 |2019年第5期|共10页
  • 作者

    Wang Maoxin; Zhang Bo; Li Gongrang; Wu Tao; Sun Dejun;

  • 作者单位

    Shandong Univ Key Lab Colloid &

    Interface Sci Educ Minist Jinan 250100 Peoples R China;

    Shandong Univ Shandong Prov Res Ctr Water Pollut Control Sch Environm Sci &

    Engn Jinan 250100 Peoples R China;

    Shengli Petr Engn Corp Ltd SINOPEC Drilling Technol Res Inst Dongying 257017 Peoples R China;

    Shandong Univ Key Lab Colloid &

    Interface Sci Educ Minist Jinan 250100 Peoples R China;

    Shandong Univ Key Lab Colloid &

    Interface Sci Educ Minist Jinan 250100 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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