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Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system

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...

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Autores principales: Wang, Maoxin, Zhang, Bo, Li, Gongrang, Wu, Tao, Sun, Dejun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9059962/
https://www.ncbi.nlm.nih.gov/pubmed/35520504
http://dx.doi.org/10.1039/c8ra09964b
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author Wang, Maoxin
Zhang, Bo
Li, Gongrang
Wu, Tao
Sun, Dejun
author_facet Wang, Maoxin
Zhang, Bo
Li, Gongrang
Wu, Tao
Sun, Dejun
author_sort Wang, Maoxin
collection PubMed
description 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.
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spelling pubmed-90599622022-05-04 Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system Wang, Maoxin Zhang, Bo Li, Gongrang Wu, Tao Sun, Dejun RSC Adv Chemistry 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. The Royal Society of Chemistry 2019-01-18 /pmc/articles/PMC9059962/ /pubmed/35520504 http://dx.doi.org/10.1039/c8ra09964b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Wang, Maoxin
Zhang, Bo
Li, Gongrang
Wu, Tao
Sun, Dejun
Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system
title Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system
title_full Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system
title_fullStr Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system
title_full_unstemmed Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system
title_short Efficient remediation of crude oil-contaminated soil using a solvent/surfactant system
title_sort efficient remediation of crude oil-contaminated soil using a solvent/surfactant system
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9059962/
https://www.ncbi.nlm.nih.gov/pubmed/35520504
http://dx.doi.org/10.1039/c8ra09964b
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