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Lin WY, Heng KS, Nguyen MQ, Ho JRI, Mohamed Noh OAB, Zhou XD, Liu A, Ren F, Wang JY. Evaluation of the leaching behavior of incineration bottom ash using seawater: A comparison with standard leaching tests. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 62:139-146. [PMID: 27964913 DOI: 10.1016/j.wasman.2016.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 12/02/2016] [Accepted: 12/02/2016] [Indexed: 06/06/2023]
Abstract
Batch and column tests were conducted on untreated incineration bottom ash (IBA) samples from two incineration plants in Singapore, using seawater as the leachant. The main objective of this study was to investigate the change in the leaching behavior of certain elements (i.e. As, Cd, Cr, Cu, Ni, Pb, Sb, Se and Zn) when IBA comes into contact with seawater. Such an investigation using seawater as leachant was not commonly carried out when investigating leaching behavior in IBA. The leaching tests were then carried out on the same IBA samples using DI water, as a comparison. Lower level of leaching was observed for Pb and Zn when seawater was used as the leachant. Cr and Sb showed significant cumulative release at Liquid-to-Solids (L/S) ratio 5 in the seawater column leaching. The influence of Dissolved Organic Carbon (DOC) on Cu leaching seems to decrease after L/S 2 when using seawater in the column test. Although the leaching behavior of IBA was affected when seawater was used, for the column test, there was no significant difference during the initial release when compared to DI water. The initial L/S fractions collected were important as the low L/S ratios represent the pore water concentration and the maximum output in an actual application. The results from this study would be useful for the future study on using IBA in marine applications.
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Affiliation(s)
- Wenlin Yvonne Lin
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore.
| | - Kim Soon Heng
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
| | - Minh Quan Nguyen
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
| | - Jin Rui Ivan Ho
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
| | - Omar Ahmad Bin Mohamed Noh
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
| | - Xue Dong Zhou
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
| | - Alec Liu
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
| | - Fei Ren
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
| | - Jing-Yuan Wang
- Residue and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
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Sámano ML, Pérez ML, Claramunt I, García A. Assessment of the zinc diffusion rate in estuarine zones. MARINE POLLUTION BULLETIN 2016; 104:121-128. [PMID: 26851870 DOI: 10.1016/j.marpolbul.2016.01.052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 01/26/2016] [Accepted: 01/29/2016] [Indexed: 06/05/2023]
Abstract
Industrial pressures suffered by estuarine zones leave a pollution record in their sediment. Thus, high concentrations of many heavy metals and some organic compounds are often found in estuarine sediment. This work aims to contribute to the enhancement of water quality management strategies in these zones by studying in detail the diffusive processes that take place between the water and sediment using a two-pronged approach: experimental practice and numerical simulation. To provide an example of the practical application of the methodologies proposed in this paper, the Suances Estuary (northern Spain) was selected as the study zone. This estuary exhibits significant historical pollution and its sediment acts as a continuous internal source of zinc, mainly due to diffusive processes derived from the concentration gradient between the interstitial water at the solid particles of the sediment and the bottom of the water column. The experimentally obtained results, based on 6 case studies, demonstrated the buffering capacity of the system and allowed the determination of the required time for the mass transfer processes to reach an equilibrium state. Furthermore, the diffusion rate of zinc was approximately modeled taking into consideration the high concentration variability observed in sediment along the entire estuary. The convergence between the modeled and the experimental results indicated the required contact time to reach an equilibrium state in a real field situation.
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Affiliation(s)
- María Luisa Sámano
- Environmental Hydraulics Institute "IH Cantabria", Universidad de Cantabria, Parque Científico y Tecnológico de Cantabria, C/Isabel Torres No. 15, 39011 Santander, Spain.
| | - María Luisa Pérez
- Environmental Hydraulics Institute "IH Cantabria", Universidad de Cantabria, Parque Científico y Tecnológico de Cantabria, C/Isabel Torres No. 15, 39011 Santander, Spain.
| | - Inigo Claramunt
- Environmental Hydraulics Institute "IH Cantabria", Universidad de Cantabria, Parque Científico y Tecnológico de Cantabria, C/Isabel Torres No. 15, 39011 Santander, Spain.
| | - Andrés García
- Environmental Hydraulics Institute "IH Cantabria", Universidad de Cantabria, Parque Científico y Tecnológico de Cantabria, C/Isabel Torres No. 15, 39011 Santander, Spain.
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Martín-Torre M, Ruiz G, Galán B, Viguri JR. Generalised mathematical model to estimate Zn, Pb, Cd, Ni, Cu, Cr and As release from contaminated estuarine sediment using pH-static leaching tests. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.08.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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