Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/105630
Title: Vertical distribution of heavy metals in seawater column during IBA construction in land reclamation – re-exploration of a large-scale field trial experiment
Authors: Yin, Ke
Chan, Wei-Ping
Dou, Xiaomin
Lisak, Grzegorz
Chang, Victor Wei-Chung
Keywords: IBA
Engineering::Environmental engineering
Vertical Distribution
Issue Date: 2018
Source: Yin, K., Chan, W.-P., Dou, X., Lisak, G., & Chang, V. W.-C. (2019). Vertical distribution of heavy metals in seawater column during IBA construction in land reclamation – re-exploration of a large-scale field trial experiment. Science of The Total Environment, 654, 356-364. doi:10.1016/j.scitotenv.2018.10.407
Series/Report no.: Science of The Total Environment
Abstract: Data from large-scale field trial experiments simulating the application of incineration bottom ash (IBA) for land reclamation were re-explored, to understand the spot-specific leaching characteristics and re-adsorption of heavy metals associated with various reclamation scenarios. Data showed that IBA leaching changed significantly as a function of seawater depth rather than time. The application of a chute had a minor effect on the total metal leached amounts; however, it would magnify the gradient of leaching concentrations across depths. Metal re-adsorption occurred within half an hour after IBA dumping, which however was significantly alleviated when a chute was applied. It may be ascribed to various degrees of contact with seawater of IBA, seawater movements and particle resuspension. Batch leaching tests from the laboratory under different L/S ratios were conducted as the references to “effective” leaching behaviors in the large-scale experiments, suggesting that the batch leaching test with the liquid to solid ratio = 10 provide a closer estimation of IBA leaching concentrations during land reclamation. As the current study took account of major field factors during land reclamation, including seawater depth (m), IBA loading (ton), IBA dropping method, particle dispersive area (m2), and settling time (min), these findings are valuable for the risk assessment of IBA utilization in land reclamation.
URI: https://hdl.handle.net/10356/105630
http://hdl.handle.net/10220/50241
ISSN: 0048-9697
DOI: 10.1016/j.scitotenv.2018.10.407
Rights: © 2018 Elsevier B.V. All rights reserved. This paper was published in Science of The Total Environment and is made available with permission of Elsevier B.V.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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