Desorption and migration behavior of beryllium from contaminated soils: insights for risk-based management

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dc.contributor.authorIslam, Ren_AU
dc.contributor.authorSanderson, Pen_AU
dc.contributor.authorPayne, TEen_AU
dc.contributor.authorJohansen, MPen_AU
dc.contributor.authorNaidu, Ren_AU
dc.date.accessioned2024-08-22T00:48:13Zen_AU
dc.date.available2024-08-22T00:48:13Zen_AU
dc.date.issued2021-11-02en_AU
dc.date.statistics2024-08-22en_AU
dc.description.abstractFactors influencing the desorption, distribution, and vertical migration behavior of Be in contaminated soils are not fully understood. This study examined the desorption and migration of Be in a soil profile from a legacy radioactive waste disposal site using different batch leaching [monofilled waste extraction procedure (MWEP); synthetic precipitation leaching procedure (SPLP); simulated acid rain solution (SARS); and toxicity characteristic leaching procedure] and sequential leaching [community bureau of reference (BCR)] methods for insights relevant to the application of risk-based management. The results showed that Be desorption was higher in the presence of organic than the inorganic leachate composition (MWEP < SPLP < SARS < TCLP < BCR first-step). The desorption followed three diffusion control mechanisms, which resulted in three desorption rate constant estimates of 157, 87.1, and 40.4 Be/kg.h0.5, and the estimated desorption maximum was 556 μg/kg. The desorption process was, spontaneous (δG > 0), enthalpically and entropically influenced. Increasing the incubation period and heat treatment resulted in a decrease of Be desorption and migration. The soil clay content and pH were the primary factors influencing Be desorption, and the results suggested that Be was desorbed from metal oxyhydroxides and surfaces of silicates (e.g., reactive surfaces of clay minerals), organic matters, and soil pores. Because of high Kd values, the mobility of Be was limited, and no exceedances of ecological or human health risk index or guidelines were determined for the current contamination levels at the site. However, Be released from the waste trenches has the ongoing potential to increase Be concentration in the soil. © 2021 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY-NC-ND 4.0.en_AU
dc.description.sponsorshipFor providing funding and technical and instrumental facilities, the authors acknowledge the University of Newcastle (UoN), the Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), and the Electron Microscope and X-ray unit (central scientific service of UoN). The authors also acknowledge ANSTO for providing additional funding and sample collection.en_AU
dc.format.mediumElectronic-eCollectionen_AU
dc.identifier.citationIslam, M. R., Sanderson, P., Payne, T. E., Johansen, M. P., & Naidu, R. (2021). Desorption and migration behavior of beryllium from contaminated soils: insights for risk-based mManagement. ACS Omega, 6(45), 30686-30697. doi:10.1021/acsomega.1c04572en_AU
dc.identifier.issn2470-1343en_AU
dc.identifier.issue45en_AU
dc.identifier.journaltitleACS Omegaen_AU
dc.identifier.pagination30686-30697en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/acsomega.1c04572en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15653en_AU
dc.identifier.volume6en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectDesorptionen_AU
dc.subjectMigrationen_AU
dc.subjectBerylliumen_AU
dc.subjectContaminationen_AU
dc.subjectSoilsen_AU
dc.subjectRisk assessmenten_AU
dc.subjectOrganic matteren_AU
dc.subjectHeat treatmentsen_AU
dc.subjectEcosystemsen_AU
dc.subjectLeachingen_AU
dc.subjectSolid wastesen_AU
dc.subjectAcid rainen_AU
dc.titleDesorption and migration behavior of beryllium from contaminated soils: insights for risk-based managementen_AU
dc.typeJournal Articleen_AU
dcterms.dateAccepted2021-10-22en_AU
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