中文版 | English
Title

Controlled sintering for cadmium stabilization by beneficially using the dredged river sediment

Author
Corresponding AuthorTang,Yuanyuan
Publication Years
2023-05-01
DOI
Source Title
ISSN
2095-2201
EISSN
2095-221X
Volume17Issue:5
Abstract
Cd-bearing solid wastes are considered to be a serious threat to the environment, and effective strategies for their treatment are urgently needed. Ceramic sintering has been considered as a promising method for efficiently incorporating heavy metal-containing solid wastes into various ceramic products. Mineral-rich dredged river sediment, especially Al and Si-containing oxides, can be treated as alternative ceramic precursors rather than being disposed of as solid wastes. To examine the feasibility of using waste sediment for Cd stabilization and the phase transition mechanisms, this study conducted a sintering scheme for the mixtures of CdO and dredged river sediment with different (Al+Si):Cd mole ratios. Detailed investigations have been performed on phases transformation, Cd incorporation mechanisms, elemental distribution, and leaching behaviors of the sintered products. Results showed that Cd incorporation and transformation in the sintered products were influenced by the mole ratio of (Al+Si):Cd. Among the high-Cd series ((Al+Si):Cd = 6:1), CdSiO, CdSiO, CdAl(SiO) and CdAlSiO were predominant Cd-containing product phases, while CdAlSiO was replaced by CdAlO when the mole ratio of (Al+Si):Cd was 12:1 (low-Cd series). Cd was efficiently stabilized in both reaction series after being sintered at ⩾ 900 °C, with < 5% leached ratio even after a prolonged leaching time, indicating excellent long-term Cd stabilization. This study demonstrated that both Cd-containing phases and the amorphous Al-/Si-containing matrices all played critical roles in Cd stabilization. A promising strategy can be proposed to simultaneously reuse the solid waste as ceramic precursors and stabilize heavy metals in the ceramic products. [Figure not available: see fulltext.].
Keywords
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
WOS Accession No
WOS:000895864400001
Scopus EID
2-s2.0-85144106918
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/442572
DepartmentSchool of Environmental Science and Engineering
Affiliation
1.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Civil Engineering,Faculty of Engineering,The University of Hong Kong,999077,Hong Kong
3.Environmental Science Center,Decarbonisation and Resource Managemental,British Geological Survey,Nottinghamshire, Keyworth,NG12 5GG,United Kingdom
First Author AffilicationSchool of Environmental Science and Engineering
Corresponding Author AffilicationSchool of Environmental Science and Engineering
First Author's First AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Xia,Yunxue,Qiu,Dong,Lyv,Zhong,et al. Controlled sintering for cadmium stabilization by beneficially using the dredged river sediment[J]. Frontiers of Environmental Science & Engineering,2023,17(5).
APA
Xia,Yunxue.,Qiu,Dong.,Lyv,Zhong.,Zhang,Jianshuai.,Singh,Narendra.,...&Tang,Yuanyuan.(2023).Controlled sintering for cadmium stabilization by beneficially using the dredged river sediment.Frontiers of Environmental Science & Engineering,17(5).
MLA
Xia,Yunxue,et al."Controlled sintering for cadmium stabilization by beneficially using the dredged river sediment".Frontiers of Environmental Science & Engineering 17.5(2023).
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