An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure

The osmotic technique, which uses polyethylene glycol (PEG) solutions of varying concentrations with semipermeable membranes of different molecular weight cutoffs (MWCO), is commonly used to apply suction in soils. Cellulose acetate membranes which are most commonly used, are susceptible to microbia...

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Main Authors:	Mohd Yuhyi, Mohd Tadza, Nurhidayah, Mahazam, Tripathy, Snehasis
Format:	Article
Language:	English English
Published:	GEOMATE International Society 2017
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/17476/ http://umpir.ump.edu.my/id/eprint/17476/ http://umpir.ump.edu.my/id/eprint/17476/ http://umpir.ump.edu.my/id/eprint/17476/1/An%20evaluation%20of%20osmotic%20technique%20under%20ultraviolet%20germicidal%20irradiation%20exposure.pdf http://umpir.ump.edu.my/id/eprint/17476/2/An%20evaluation%20of%20osmotic%20technique%20under%20ultraviolet%20germicidal%20irradiation%20exposure%201.pdf

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spelling	ump-174762019-10-18T02:55:10Z http://umpir.ump.edu.my/id/eprint/17476/ An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure Mohd Yuhyi, Mohd Tadza Nurhidayah, Mahazam Tripathy, Snehasis TA Engineering (General). Civil engineering (General) The osmotic technique, which uses polyethylene glycol (PEG) solutions of varying concentrations with semipermeable membranes of different molecular weight cutoffs (MWCO), is commonly used to apply suction in soils. Cellulose acetate membranes which are most commonly used, are susceptible to microbial attacks. This in turn will lead to the intrusion of PEG into soil specimens. Osmotic and vapour equilibrium techniques are often used to establish drying suction-water content soil-water characteristic curves (SWCC). In this study, suctions of 0.11 to 300 MPa were applied on Andrassy bentonite slurries. At higher applied suctions, the osmotic tests were carried under short length ultraviolet germicidal irradiation (UVGI). In addition, Atomic Force Microscopy (AFM) and Fourier Infrared (FTiR) were employed to evaluate the changes in the semipermeable membranes and PEG molecules, respectively. The water content of the clay obtained from the osmotic tests was found to be greater at the overlapping suction region. Interestingly, under UVGI exposure, the water content was found to be in good agreement with the water content determined using the osmotic technique at low suctions and the vapour equilibrium technique at higher suctions. FTiR spectrum and AFM results revealed that some changes had occurred on both the PEG and in the membrane pore sizes. However, these changes did not affect the final water content in the bentonite and therefore, more precise suction-water content SWCC for the clay could be established. GEOMATE International Society 2017-04 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/17476/1/An%20evaluation%20of%20osmotic%20technique%20under%20ultraviolet%20germicidal%20irradiation%20exposure.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/17476/2/An%20evaluation%20of%20osmotic%20technique%20under%20ultraviolet%20germicidal%20irradiation%20exposure%201.pdf Mohd Yuhyi, Mohd Tadza and Nurhidayah, Mahazam and Tripathy, Snehasis (2017) An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure. International Journal of GEOMATE, 12 (32). pp. 30-36. ISSN 2186-2982(print); 2186-2990(online) http://dx.doi.org/10.21660/2017.32.6578 DOI: 10.21660/2017.32.6578
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Mohd Yuhyi, Mohd Tadza Nurhidayah, Mahazam Tripathy, Snehasis An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure
description	The osmotic technique, which uses polyethylene glycol (PEG) solutions of varying concentrations with semipermeable membranes of different molecular weight cutoffs (MWCO), is commonly used to apply suction in soils. Cellulose acetate membranes which are most commonly used, are susceptible to microbial attacks. This in turn will lead to the intrusion of PEG into soil specimens. Osmotic and vapour equilibrium techniques are often used to establish drying suction-water content soil-water characteristic curves (SWCC). In this study, suctions of 0.11 to 300 MPa were applied on Andrassy bentonite slurries. At higher applied suctions, the osmotic tests were carried under short length ultraviolet germicidal irradiation (UVGI). In addition, Atomic Force Microscopy (AFM) and Fourier Infrared (FTiR) were employed to evaluate the changes in the semipermeable membranes and PEG molecules, respectively. The water content of the clay obtained from the osmotic tests was found to be greater at the overlapping suction region. Interestingly, under UVGI exposure, the water content was found to be in good agreement with the water content determined using the osmotic technique at low suctions and the vapour equilibrium technique at higher suctions. FTiR spectrum and AFM results revealed that some changes had occurred on both the PEG and in the membrane pore sizes. However, these changes did not affect the final water content in the bentonite and therefore, more precise suction-water content SWCC for the clay could be established.
format	Article
author	Mohd Yuhyi, Mohd Tadza Nurhidayah, Mahazam Tripathy, Snehasis
author_facet	Mohd Yuhyi, Mohd Tadza Nurhidayah, Mahazam Tripathy, Snehasis
author_sort	Mohd Yuhyi, Mohd Tadza
title	An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure
title_short	An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure
title_full	An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure
title_fullStr	An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure
title_full_unstemmed	An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure
title_sort	evaluation of osmotic technique under ultraviolet germicidal irradiation exposure
publisher	GEOMATE International Society
publishDate	2017
url	http://umpir.ump.edu.my/id/eprint/17476/ http://umpir.ump.edu.my/id/eprint/17476/ http://umpir.ump.edu.my/id/eprint/17476/ http://umpir.ump.edu.my/id/eprint/17476/1/An%20evaluation%20of%20osmotic%20technique%20under%20ultraviolet%20germicidal%20irradiation%20exposure.pdf http://umpir.ump.edu.my/id/eprint/17476/2/An%20evaluation%20of%20osmotic%20technique%20under%20ultraviolet%20germicidal%20irradiation%20exposure%201.pdf
first_indexed	2023-09-18T22:24:09Z
last_indexed	2023-09-18T22:24:09Z
_version_	1777415854012497920

An Evaluation of Osmotic Technique Under Ultraviolet Germicidal Irradiation Exposure

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