Mechanistic insights into red mud, blast furnace slag, or metakaolin-assisted stabilization/solidification of arsenic-contaminated sediment
DC Field | Value | Language |
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dc.contributor.author | Wang, Lei | - |
dc.contributor.author | Chen, Liang | - |
dc.contributor.author | Tsang, Daniel C. W. | - |
dc.contributor.author | Zhou, Yaoyu | - |
dc.contributor.author | Rinklebe, Joerg | - |
dc.contributor.author | Song, Hocheol | - |
dc.contributor.author | Kwon, Eilhann E. | - |
dc.contributor.author | Baek, Kitae | - |
dc.contributor.author | Ok, Yong Sik | - |
dc.date.accessioned | 2021-08-31T22:47:26Z | - |
dc.date.available | 2021-08-31T22:47:26Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2019-12 | - |
dc.identifier.issn | 0160-4120 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/61422 | - |
dc.description.abstract | Elevated level of arsenic (As) in marine sediment via deposition and accumulation presents long-term ecological risks. This study proposed a sustainable stabilization/solidification (S/S) of As-contaminated sediment via novel valorization of red mud waste, blast furnace slag and calcined clay mineral, which were selected to mitigate the increased leaching of As under alkaline environment of S/S treatment. Quantitative X-ray diffraction and thermogravimetric analyses illustrated that stable Ca-As complexes (e.g., Ca-5(AsO4)(3)OH) could be formed at the expense of Ca(OH)(2) consumption, which inevitably hindered the hydration process and S/S efficiency. The Si-29 nuclear magnetic resonance analysis revealed that incorporation of metakaolin for As immobilization resulted in a low degree of hydration and polymerization, whereas addition of red mud promoted Fe-As complexation and demonstrated excellent compatibility with As. Transmission electron microscopy and elemental mapping further confirmed the precipitation of crystalline Ca-As and amorphous Fe-As compounds. Therefore, red mud-incorporated S/S binder achieved the highest efficiency of As immobilization (99.9%), which proved to be applicable for both in-situ and ex-situ S/S of As-contaminated sediment. These results advance our mechanistic understanding for the design of green and sustainable remediation approach for effective As immobilization. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | GREEN REMEDIATION | - |
dc.subject | HEAVY-METALS | - |
dc.subject | FLY-ASH | - |
dc.subject | CEMENT | - |
dc.subject | SPECIATION | - |
dc.subject | SOIL | - |
dc.subject | PB | - |
dc.subject | STABILIZATION | - |
dc.subject | CLAY | - |
dc.subject | MICROSTRUCTURE | - |
dc.title | Mechanistic insights into red mud, blast furnace slag, or metakaolin-assisted stabilization/solidification of arsenic-contaminated sediment | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Ok, Yong Sik | - |
dc.identifier.doi | 10.1016/j.envint.2019.105247 | - |
dc.identifier.scopusid | 2-s2.0-85074153391 | - |
dc.identifier.wosid | 000498906200041 | - |
dc.identifier.bibliographicCitation | ENVIRONMENT INTERNATIONAL, v.133 | - |
dc.relation.isPartOf | ENVIRONMENT INTERNATIONAL | - |
dc.citation.title | ENVIRONMENT INTERNATIONAL | - |
dc.citation.volume | 133 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Environmental Sciences & Ecology | - |
dc.relation.journalWebOfScienceCategory | Environmental Sciences | - |
dc.subject.keywordPlus | GREEN REMEDIATION | - |
dc.subject.keywordPlus | HEAVY-METALS | - |
dc.subject.keywordPlus | FLY-ASH | - |
dc.subject.keywordPlus | CEMENT | - |
dc.subject.keywordPlus | SPECIATION | - |
dc.subject.keywordPlus | SOIL | - |
dc.subject.keywordPlus | PB | - |
dc.subject.keywordPlus | STABILIZATION | - |
dc.subject.keywordPlus | CLAY | - |
dc.subject.keywordPlus | MICROSTRUCTURE | - |
dc.subject.keywordAuthor | Green/sustainable remediation | - |
dc.subject.keywordAuthor | Potentially toxic element | - |
dc.subject.keywordAuthor | Arsenic leachability | - |
dc.subject.keywordAuthor | Waste valorization/recycling | - |
dc.subject.keywordAuthor | Hydration and polymerization | - |
dc.subject.keywordAuthor | Precipitation chemistry | - |
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