Controlling Soil and Water Acidity in Acid Sulfate Soil Terrains Using Permeable Reactive Barriers

Medawela, S; Indraratna, B; Pathirage, U; Heitor, A

Controlling Soil and Water Acidity in Acid Sulfate Soil Terrains Using Permeable Reactive Barriers

Medawela, S Indraratna, B

Pathirage, U Heitor, A

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Publisher:: Springer
Publication Type:: Conference Proceeding
Citation:: Geotechnics for Transportation Infrastructure, 2019, 28, pp. 413-426
Issue Date:: 2019-01-01

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Field	Value	Language
dc.contributor.author	Medawela, S
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Pathirage, U
dc.contributor.author	Heitor, A
dc.date	2018-04-07
dc.date.accessioned	2020-05-02T00:35:53Z
dc.date.available	2020-05-02T00:35:53Z
dc.date.issued	2019-01-01
dc.identifier.citation	Geotechnics for Transportation Infrastructure, 2019, 28, pp. 413-426
dc.identifier.isbn	978-981-13-6700-7
dc.identifier.issn	2366-2557
dc.identifier.issn	2366-2565
dc.identifier.uri	http://hdl.handle.net/10453/140396
dc.description.abstract	© 2019, Springer Nature Singapore Pte Ltd. There are about 12–14 million ha of acid sulfate soils (ASSs) found throughout the length and breadth of the earth. Bridge and building foundations, pipelines, culverts, and other buried infrastructure in such acidic environments are deteriorated when they are exposed to higher acidity, which is generated due to leaching of sulfuric acid from ASS. Thus, acidic groundwater should be properly treated to avoid detrimental effects on natural environment and strenuous efforts on repairing damaged manmade structures. Since the early 90s, permeable reactive barriers (PRBs) were implemented in several places worldwide and it was proven that PRBs are capable of competently treating poor-quality groundwater with various contaminants. While the acidic groundwater flows through a PRB, contaminants (toxic cations) are removed by mineral precipitation and due to the chemical reactions occur, a near-neutral pH is maintained in the effluent. Nevertheless, longevity of the PRB is alleviated due to coupled clogging in porous media. Physical, chemical, and biological clogging mechanisms and the existing PRB design criteria have been critically reviewed in this paper, including precursory numerical models. It is imperative to extend existing equations and models combining all possible clogging mechanisms, to assure the maximum acid removal capacity of a PRB. Hence, water and soil quality would be enhanced to make the land safe for transport and other infrastructure developments.
dc.language	en
dc.publisher	Springer
dc.relation.ispartof	Geotechnics for Transportation Infrastructure
dc.relation.ispartof	International Symposium on Geotechnics for Transportation Infrastructure
dc.relation.isbasedon	10.1007/978-981-13-6701-4_27
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Controlling Soil and Water Acidity in Acid Sulfate Soil Terrains Using Permeable Reactive Barriers
dc.type	Conference Proceeding
utslib.citation.volume	28
utslib.location.activity	Delhi, India
utslib.for	0905 Civil Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2020-05-02T00:35:50Z
pubs.finish-date	2018-04-08
pubs.place-of-publication	Switzerland
pubs.publication-status	Published
pubs.start-date	2018-04-07
pubs.volume	28
utslib.start-page	413
dc.location	Switzerland

Abstract:

© 2019, Springer Nature Singapore Pte Ltd. There are about 12–14 million ha of acid sulfate soils (ASSs) found throughout the length and breadth of the earth. Bridge and building foundations, pipelines, culverts, and other buried infrastructure in such acidic environments are deteriorated when they are exposed to higher acidity, which is generated due to leaching of sulfuric acid from ASS. Thus, acidic groundwater should be properly treated to avoid detrimental effects on natural environment and strenuous efforts on repairing damaged manmade structures. Since the early 90s, permeable reactive barriers (PRBs) were implemented in several places worldwide and it was proven that PRBs are capable of competently treating poor-quality groundwater with various contaminants. While the acidic groundwater flows through a PRB, contaminants (toxic cations) are removed by mineral precipitation and due to the chemical reactions occur, a near-neutral pH is maintained in the effluent. Nevertheless, longevity of the PRB is alleviated due to coupled clogging in porous media. Physical, chemical, and biological clogging mechanisms and the existing PRB design criteria have been critically reviewed in this paper, including precursory numerical models. It is imperative to extend existing equations and models combining all possible clogging mechanisms, to assure the maximum acid removal capacity of a PRB. Hence, water and soil quality would be enhanced to make the land safe for transport and other infrastructure developments.

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http://hdl.handle.net/10453/140396