English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/23634
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Assessment of the use of industrial by-products for induced reduction of As, and Se potential leachability in an acid soil

AuthorsRodríguez Jordá, M. P.; Garrido, Fernando ; García-González, M.T.
KeywordsIn situ remediation
Industrial by-products
Toxic elements
Metalloid leachability
Issue Date2010
PublisherElsevier
CitationJournal of Hazardous Materials 175: 328-335 (2010)
AbstractFour industrial by-products (phosphogypsum, PG; red gypsum, RG; sugar foam, SF and ashes from the combustion of biomass, ACB) were evaluated as possible amendments for reducing the leachability and bioavailability of As and Se in a metalloid-spiked acidic soil. The treatments were applied as single, double and triple amendments and at two different rates. The effectiveness of the treatments was evaluated after a series of leaching experiments using a chelating agent (DTPA solution) or a weak acidification (acetic acid at pH 4.93). The most effective treatments (ACB and RG, both applied at high rate) were identified by means of Cluster Analysis using the leachability indexes. Different sorption mechanisms involved in the overall reduction of metalloid leachability were identified using scanning electron microscopy (SEM-BSE and SEM-EDS). In the ACB-treated samples, Se was found associated to organic matter aggregates and to Fe compounds. In the RG-treated samples, EDS analyses showed that As and Se were associated to Fe/Ti (hydr)oxides phases which are present not only in the by-product as maghemite and rutile, but also in the soil as hematite and goethite. In addition, the application of RG induced the formation of non-crystalline Al-hydroxy polymers with As and Se in their composition.
Description8 pages, photos, figures, and tables statistics.
Publisher version (URL)http://dx.doi.org/10.1016/j.jhazmat.2009.10.007
URIhttp://hdl.handle.net/10261/23634
DOI10.1016/j.jhazmat.2009.10.007
ISSN0304-3894
Appears in Collections:(ICA) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.