Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/12886
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Quina, Margarida J. | - |
dc.contributor.author | Bordado, João C. M. | - |
dc.contributor.author | Quinta-Ferreira, Rosa M. | - |
dc.date.accessioned | 2010-03-12T14:25:44Z | - |
dc.date.available | 2010-03-12T14:25:44Z | - |
dc.date.issued | 2009-09 | - |
dc.identifier.citation | Waste Management. 29:9 (2009) 2483-2493 | en_US |
dc.identifier.issn | 0956-053X | - |
dc.identifier.uri | https://hdl.handle.net/10316/12886 | - |
dc.description.abstract | The influence of pH on the leaching behaviour of air pollution control (APC) residues produced in municipal solid waste incineration (MSWI) is addressed in this study. The residue is considered hazardous waste, and in accordance with their chemical properties, the leaching of contaminants into the environment is the main concern. Several leaching tests can be used for research studies or regulatory purposes, where a wide variety of conditions may be tested. Our work deals mainly with the leaching behaviour of toxic heavy metals (Pb, Cd, Zn, Cr, Ni, Cu) and inorganics associated with soluble salts (Na, K, Ca, Cl). The main goal is to obtain an overview of the leachability of APC residues produced in a Portuguese MSWI process. Among the different variables that may have influence on the leaching behaviour, pH of the leachant solution is the most important one, and was evaluated through pH static tests. The acid neutralization capacity (ANC) of the residue was also determined, which is in the range of 6.2-6.8 meq g-1 (for pH = 7) and 10.1-11.6 meq g-1 (for pH = 4). The analysis of the leaching behaviour is particularly important when the leaching is solubility controlled. The amphoteric behaviour of some elements was observed, namely for Pb and Zn, which is characterized through high solubilization at low and high pH and moderate or low solubility at neutral or moderate high pH. The solubility curves for Pb, Cd, Zn, Cr, Ni and Cu as a function of pH were obtained, which are very useful for predicting the leaching behaviour in different scenarios. The solubility of K and Na reveals to be nearly independent of the solution pH and the released amount is mainly availability-controlled. Moreover, the pH static test showed that Cl- is the most pH-independent species. The APC residue turns out to be a hazardous waste because of the high leaching of lead and chloride. On the other hand, leaching of elements like cadmium, nickel and copper is limited by the high pH of the residue, and as long as the waste keeps its ANC, the risk of mobilization of these elements is low | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Elsevier Ltd. | en_US |
dc.rights | openAccess | en_US |
dc.title | The influence of pH on the leaching behaviour of inorganic components from municipal solid waste APC residues | en_US |
dc.type | article | en_US |
dc.identifier.doi | 10.1016/j.wasman.2009.05.012 | - |
item.fulltext | Com Texto completo | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.author.researchunit | CIEPQPF – Chemical Process Engineering and Forest Products Research Centre | - |
crisitem.author.researchunit | CIEPQPF – Chemical Process Engineering and Forest Products Research Centre | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.orcid | 0000-0002-9651-2427 | - |
crisitem.author.orcid | 0000-0002-0762-2641 | - |
Appears in Collections: | FCTUC Eng.Química - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
The influence of pH on the leaching behaviour.pdf | 415.73 kB | Adobe PDF | View/Open |
SCOPUSTM
Citations
171
checked on Sep 23, 2024
WEB OF SCIENCETM
Citations
161
checked on Sep 2, 2024
Page view(s)
298
checked on Sep 24, 2024
Download(s) 50
1,366
checked on Sep 24, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.