Comprehensive geophysical, geotechnical, and geochemical assessments of an offshore landfill in Singapore

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dc.contributor.authorZhang, Zhibo
dc.contributor.authorYuan, Ziwen
dc.contributor.authorHu, Lei
dc.contributor.authorCoulon, Frederic
dc.contributor.authorLiu, Huaxin
dc.contributor.authorCheng, Zhanbo
dc.contributor.authorWu, Shifan
dc.contributor.authorLiu, Qian
dc.contributor.authorPi, Xiaoqing
dc.contributor.authorWu, Wei
dc.contributor.authorFei, Xunchang
dc.date.accessioned2024-09-25T13:03:09Z
dc.date.available2024-09-25T13:03:09Z
dc.date.freetoread2024-09-25
dc.date.issued2024-12-05
dc.date.pubOnline2024-09-19
dc.description.abstractComprehensive site investigation techniques, including Electrical Resistivity Tomography (ERT), Induced Polarization (IP), Multichannel Analysis of Surface Waves (MASW), and Microtremor Array Method (MAM), were integrated with geotechnical and geochemical tests of retrieved waste samples from Singapore’s operational offshore landfill. The properties of landfill wastes vary widely, including shear-wave velocities 127–248 m/s, densities 1.2–2.1 Mg/m3, resistivity 3.0–25.3 Ω∙m, and chargeability 48–82 mV/V. The natural clay layer underneath was clearly delineated and effectively mitigated leachate leakage. K-means clustering of the geophysical data facilitates precise mapping of waste distribution and quantities of recoverable metals based on quantitative criteria. This study illustrates a thorough case study adopting the new site investigation and characterization paradigm for an offshore landfill, which provides insights into leachate leakage detection and evaluations of landfill mining and resource recovery.
dc.description.journalNameJournal of Hazardous Materials
dc.description.sponsorshipThis research/project is supported by the National Research Foundation, Singapore, and the National Environment Agency, Singapore under its Closing the Waste Loop Funding Initiative (Award No. USS-IF-2021–4).
dc.identifier.citationZhang Z, Yuan Z, Hu L, et al., (2024) Comprehensive geophysical, geotechnical, and geochemical assessments of an offshore landfill in Singapore. Journal of Hazardous Materials, Volume 480, December 2024, Article number 135908
dc.identifier.elementsID553688
dc.identifier.issn0304-3894
dc.identifier.paperNo135908
dc.identifier.urihttps://doi.org/10.1016/j.jhazmat.2024.135908
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/22973
dc.identifier.volumeNo480
dc.languageEnglish
dc.language.isoen
dc.publisherElsevier
dc.publisher.urihttps://www.sciencedirect.com/science/article/abs/pii/S0304389424024877?via%3Dihub
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject40 Engineering
dc.subjectStrategic, Defence & Security Studies
dc.subject34 Chemical sciences
dc.subject40 Engineering
dc.subject41 Environmental sciences
dc.subjectlandfill investigation
dc.subjectelectrical resistivity tomography
dc.subjecttime-domain induced polarization
dc.subjectshear-wave velocity
dc.subject3D geophysical modeling
dc.subjectK-means clustering.
dc.titleComprehensive geophysical, geotechnical, and geochemical assessments of an offshore landfill in Singapore
dc.typeArticle
dcterms.dateAccepted2024-09-18

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