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Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction

Steam-enhanced extraction has been reviewed by many researchers as an innovative technology to remediate dense non-aqueous phase liquid (DNAPL) from subsurface. However, the application of steam-enhanced extraction to heterogeneous subsurface conditions is still obscurity and its implementation is l...

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Main Authors:	Azizan, Nor Asni, Kamaruddin, Samira Albati, Chelliapan, Shreeshivadasan
Format:	Article
Language:	English
Published:	Asian Research Publishing Network 2016
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/71340/1/ShreeshivadasanChelliapan2016_Simulationofdensenon-aqueous.pdf http://eprints.utm.my/id/eprint/71340/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-84962769894&partnerID=40&md5=4b02b59abb9b9c8b3f13e11c0af40c9d
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id	my.utm.71340
record_format	eprints
spelling	my.utm.713402017-11-20T08:30:34Z http://eprints.utm.my/id/eprint/71340/ Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction Azizan, Nor Asni Kamaruddin, Samira Albati Chelliapan, Shreeshivadasan TA Engineering (General). Civil engineering (General) Steam-enhanced extraction has been reviewed by many researchers as an innovative technology to remediate dense non-aqueous phase liquid (DNAPL) from subsurface. However, the application of steam-enhanced extraction to heterogeneous subsurface conditions is still obscurity and its implementation is limited due to steam flow sensitivity to site characterization. Two-dimensional (2-D) simulations were performed to assess the efficiency of steam-enhanced extraction in remediation of heterogeneous subsurface contaminated with tetrachloroethylene (PCE) spill. The simulation was performed with four different steam injection rates. The results shows that increased in steam injection rate will increase the PCE remediation time. The steam injection with the rate of 1.0 x 10-4 kg/s was successfully removing 100% of the PCE. There are significant impacts in the difference in remediation time with the increment approximately 20 min, 40 min and 70 min for every 2.0 x 10-5 kg/s increment. The dominant mechanisms of PCE removal is physical displacement through vaporization and co-boiling enhanced by steam distillation and steam stripping. The simulation results of steam-enhanced extraction for PCE removal was compared with surfactant-enhanced method implemented in existing experimental study. It was discovered that the time required to remove PCE using steam-enhanced extraction is four times faster than the time required to remove PCE using surfactant-enhanced method. This shows the capability of steam-enhanced extraction to recover contaminant more effectively. Steam-enhanced extraction has a greatest potential to decrease clean-up time which will offset greater capitol cost of the system. Asian Research Publishing Network 2016 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/71340/1/ShreeshivadasanChelliapan2016_Simulationofdensenon-aqueous.pdf Azizan, Nor Asni and Kamaruddin, Samira Albati and Chelliapan, Shreeshivadasan (2016) Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction. ARPN Journal of Engineering and Applied Sciences, 11 (6). pp. 3731-3739. ISSN 1819-6608 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84962769894&partnerID=40&md5=4b02b59abb9b9c8b3f13e11c0af40c9d
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Azizan, Nor Asni Kamaruddin, Samira Albati Chelliapan, Shreeshivadasan Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction
description	Steam-enhanced extraction has been reviewed by many researchers as an innovative technology to remediate dense non-aqueous phase liquid (DNAPL) from subsurface. However, the application of steam-enhanced extraction to heterogeneous subsurface conditions is still obscurity and its implementation is limited due to steam flow sensitivity to site characterization. Two-dimensional (2-D) simulations were performed to assess the efficiency of steam-enhanced extraction in remediation of heterogeneous subsurface contaminated with tetrachloroethylene (PCE) spill. The simulation was performed with four different steam injection rates. The results shows that increased in steam injection rate will increase the PCE remediation time. The steam injection with the rate of 1.0 x 10-4 kg/s was successfully removing 100% of the PCE. There are significant impacts in the difference in remediation time with the increment approximately 20 min, 40 min and 70 min for every 2.0 x 10-5 kg/s increment. The dominant mechanisms of PCE removal is physical displacement through vaporization and co-boiling enhanced by steam distillation and steam stripping. The simulation results of steam-enhanced extraction for PCE removal was compared with surfactant-enhanced method implemented in existing experimental study. It was discovered that the time required to remove PCE using steam-enhanced extraction is four times faster than the time required to remove PCE using surfactant-enhanced method. This shows the capability of steam-enhanced extraction to recover contaminant more effectively. Steam-enhanced extraction has a greatest potential to decrease clean-up time which will offset greater capitol cost of the system.
format	Article
author	Azizan, Nor Asni Kamaruddin, Samira Albati Chelliapan, Shreeshivadasan
author_facet	Azizan, Nor Asni Kamaruddin, Samira Albati Chelliapan, Shreeshivadasan
author_sort	Azizan, Nor Asni
title	Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction
title_short	Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction
title_full	Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction
title_fullStr	Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction
title_full_unstemmed	Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction
title_sort	simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction
publisher	Asian Research Publishing Network
publishDate	2016
url	http://eprints.utm.my/id/eprint/71340/1/ShreeshivadasanChelliapan2016_Simulationofdensenon-aqueous.pdf http://eprints.utm.my/id/eprint/71340/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-84962769894&partnerID=40&md5=4b02b59abb9b9c8b3f13e11c0af40c9d
_version_	1643656174502936576
score	13.211869

Simulation of dense non-aqueous phase liquid remediation through steam-enhanced extraction

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