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 (m 2 ), and settling time (min), these findings are valuable for the risk assessment of IBA utilization in land reclamation.
| Original language | English |
|---|---|
| Pages (from-to) | 356-364 |
| Number of pages | 9 |
| Journal | Science of the Total Environment |
| Volume | 654 |
| DOIs | |
| Publication status | Published - 1 Mar 2019 |
Keywords
- Ecotoxicity
- Heavy metal leaching potential
- IBA
- Land reclamation
- Vertical distribution
Cite this
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Vertical distribution of heavy metals in seawater column during IBA construction in land reclamation – Re-exploration of a large-scale field trial experiment. / Yin, Ke; Chan, Wei Ping; Dou, Xiaomin; Lisak, Grzegorz; Chang, Victor Wei Chung.
In: Science of the Total Environment, Vol. 654, 01.03.2019, p. 356-364.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Vertical distribution of heavy metals in seawater column during IBA construction in land reclamation – Re-exploration of a large-scale field trial experiment
AU - Yin, Ke
AU - Chan, Wei Ping
AU - Dou, Xiaomin
AU - Lisak, Grzegorz
AU - Chang, Victor Wei Chung
PY - 2019/3/1
Y1 - 2019/3/1
N2 - 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 (m 2 ), and settling time (min), these findings are valuable for the risk assessment of IBA utilization in land reclamation.
AB - 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 (m 2 ), and settling time (min), these findings are valuable for the risk assessment of IBA utilization in land reclamation.
KW - Ecotoxicity
KW - Heavy metal leaching potential
KW - IBA
KW - Land reclamation
KW - Vertical distribution
UR - http://www.scopus.com/inward/record.url?scp=85056476221&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2018.10.407
DO - 10.1016/j.scitotenv.2018.10.407
M3 - Article
VL - 654
SP - 356
EP - 364
JO - Science of the Total Environment
JF - Science of the Total Environment
SN - 0048-9697
ER -