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Article: Evaluating the environmental impacts of stabilization and solidification technologies for managing hazardous wastes through life cycle assessment: A case study of Hong Kong
Title | Evaluating the environmental impacts of stabilization and solidification technologies for managing hazardous wastes through life cycle assessment: A case study of Hong Kong |
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Authors | |
Keywords | Contaminated sediment Waste incineration fly ash Stabilization/solidification Green remediation Construction utilization |
Issue Date | 2020 |
Publisher | Elsevier: Creative Commons Licenses. The Journal's web site is located at http://www.elsevier.com/locate/envint |
Citation | Environment International, 2020, v. 145, p. article no. 106139 How to Cite? |
Abstract | Proper management of hazardous materials arouses widespread environmental concerns due to its enormous ecological and health impacts. The development of green stabilization/solidification (S/S) technology for resourceful utilization of hazardous materials, as well as the immobilization of potentially toxic elements is of great scientific interests. Cement-based S/S is often considered a low-cost and highly efficient technology, but the environmental sustainability of a broad spectrum of S/S technologies has yet to be evaluated. Therefore, this study assessed the environmental sustainability of S/S technologies for managing two common types of hazardous wastes, i.e., contaminated marine sediment and municipal solid waste incineration fly ash (MIFA) by using life cycle assessment (LCA). A total of 17 scenarios under three strategies for sediment and two strategies for MIFA S/S technologies were comprehensively evaluated. The LCA results identified the most preferable S/S technology in each strategy. In particular, Scenario 1 (mixture of sediment with a small percentage of ordinary Portland cement and incinerated sewage sludge ash) of Strategy 1 (use as fill materials) would be the preferred option, as it reduces about 54% and 70% global warming potential compared to those of Scenarios 2 and 3, respectively. This is the first initiative for evaluating the environmental impacts of a wide range of recently developed S/S technologies using green/alternative binders for diverting hazardous wastes from disposal. The results can serve as a decision support for the practical application of the environmentally friendly S/S technology for sustainable remediation. |
Persistent Identifier | http://hdl.handle.net/10722/288453 |
ISSN | 2023 Impact Factor: 10.3 2023 SCImago Journal Rankings: 3.015 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Hossain, MU | - |
dc.contributor.author | Lei, W | - |
dc.contributor.author | Chen, L | - |
dc.contributor.author | Tsang, DCW | - |
dc.contributor.author | Ng, ST | - |
dc.contributor.author | Poon, CS | - |
dc.contributor.author | Mechtcherine, V | - |
dc.date.accessioned | 2020-10-05T12:13:08Z | - |
dc.date.available | 2020-10-05T12:13:08Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Environment International, 2020, v. 145, p. article no. 106139 | - |
dc.identifier.issn | 0160-4120 | - |
dc.identifier.uri | http://hdl.handle.net/10722/288453 | - |
dc.description.abstract | Proper management of hazardous materials arouses widespread environmental concerns due to its enormous ecological and health impacts. The development of green stabilization/solidification (S/S) technology for resourceful utilization of hazardous materials, as well as the immobilization of potentially toxic elements is of great scientific interests. Cement-based S/S is often considered a low-cost and highly efficient technology, but the environmental sustainability of a broad spectrum of S/S technologies has yet to be evaluated. Therefore, this study assessed the environmental sustainability of S/S technologies for managing two common types of hazardous wastes, i.e., contaminated marine sediment and municipal solid waste incineration fly ash (MIFA) by using life cycle assessment (LCA). A total of 17 scenarios under three strategies for sediment and two strategies for MIFA S/S technologies were comprehensively evaluated. The LCA results identified the most preferable S/S technology in each strategy. In particular, Scenario 1 (mixture of sediment with a small percentage of ordinary Portland cement and incinerated sewage sludge ash) of Strategy 1 (use as fill materials) would be the preferred option, as it reduces about 54% and 70% global warming potential compared to those of Scenarios 2 and 3, respectively. This is the first initiative for evaluating the environmental impacts of a wide range of recently developed S/S technologies using green/alternative binders for diverting hazardous wastes from disposal. The results can serve as a decision support for the practical application of the environmentally friendly S/S technology for sustainable remediation. | - |
dc.language | eng | - |
dc.publisher | Elsevier: Creative Commons Licenses. The Journal's web site is located at http://www.elsevier.com/locate/envint | - |
dc.relation.ispartof | Environment International | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Contaminated sediment | - |
dc.subject | Waste incineration fly ash | - |
dc.subject | Stabilization/solidification | - |
dc.subject | Green remediation | - |
dc.subject | Construction utilization | - |
dc.title | Evaluating the environmental impacts of stabilization and solidification technologies for managing hazardous wastes through life cycle assessment: A case study of Hong Kong | - |
dc.type | Article | - |
dc.identifier.email | Hossain, MU: uzzal@hku.hk | - |
dc.identifier.email | Ng, ST: tstng@hku.hk | - |
dc.identifier.authority | Hossain, MU=rp02580 | - |
dc.identifier.authority | Ng, ST=rp00158 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1016/j.envint.2020.106139 | - |
dc.identifier.pmid | 32980737 | - |
dc.identifier.scopus | eid_2-s2.0-85091630831 | - |
dc.identifier.hkuros | 315468 | - |
dc.identifier.volume | 145 | - |
dc.identifier.spage | article no. 106139 | - |
dc.identifier.epage | article no. 106139 | - |
dc.identifier.isi | WOS:000580632000055 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.issnl | 0160-4120 | - |