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Leaching Behaviour of Synthetic Leachate through a Sewage Sludge and Red Gypsum Composite as Intermediate Landfill Cover

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dc.citedby1
dc.contributor.authorRosli N.A.en_US
dc.contributor.authorAbdul Aziz H.en_US
dc.contributor.authorKueh A.B.H.en_US
dc.contributor.authorLim L.L.P.en_US
dc.contributor.authorZawawi M.H.en_US
dc.contributor.authorid57209705073en_US
dc.contributor.authorid7005960760en_US
dc.contributor.authorid16202991500en_US
dc.contributor.authorid28567885800en_US
dc.contributor.authorid39162217600en_US
dc.date.accessioned2024-10-14T03:18:45Z
dc.date.available2024-10-14T03:18:45Z
dc.date.issued2023
dc.description.abstractThis paper examines the environmental impact of the use of compacted sewage sludge:red gypsum (SS:RG) mixture as intermediate landfill cover in terms of yield and quality of leachate as characterised by hydraulic conductivity and leaching behaviour. A series of column tests using the constant head method is carried out by percolating the synthetic leachate through samples that have been compacted at various degrees (60, 70, 75, 80 and 85%). The leachate quality is monitored at pre-determined days for pH, COD, Cu, Fe and Zn. In general, hydraulic conductivity decreases in three stages, in which the first stage is mainly attributed to the particle rearrangement and hydration of calcium silicate hydrate (CSH). The hydration of CSH increases the pH, which causes the heavy metal to precipitate and be entrapped within the matrices of CSH gel, thereby further reducing the porosity and hydraulic conductivity. A minimum of 75% compaction has shown favourable final porosity, hydraulic conductivity, and leachate quality, although a minimum of 80% compaction is recommended in order to achieve a satisfactory compressive strength of greater than 345 kPa for a landfill operation. � 2023 by the authors.en_US
dc.description.natureFinalen_US
dc.identifier.ArtNo4229
dc.identifier.doi10.3390/su15054229
dc.identifier.issue5
dc.identifier.scopus2-s2.0-85149912047
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85149912047&doi=10.3390%2fsu15054229&partnerID=40&md5=82ef14262ebfb3e96b6d0315476e77e4
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/34270
dc.identifier.volume15
dc.publisherMDPIen_US
dc.relation.ispartofAll Open Access
dc.relation.ispartofGold Open Access
dc.sourceScopus
dc.sourcetitleSustainability (Switzerland)
dc.subjectdegree of compaction
dc.subjecthydraulic conductivity
dc.subjectintermediate landfill cover
dc.subjectleaching behaviour
dc.subjectcompaction
dc.subjectcompressive strength
dc.subjectgypsum
dc.subjectheavy metal
dc.subjecthydraulic conductivity
dc.subjectlandfill
dc.subjectleaching
dc.subjectporosity
dc.subjectsludge
dc.titleLeaching Behaviour of Synthetic Leachate through a Sewage Sludge and Red Gypsum Composite as Intermediate Landfill Coveren_US
dc.typeArticleen_US
dspace.entity.typePublication
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