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The effectiveness of the stabilization/solidification process on the leachability and toxicity of the tannery sludge chromium

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The effectiveness of the stabilization/solidification process on the leachability and toxicity of the tannery sludge chromium

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dc.contributor.author Montañés Sanjuan, María Teresa es_ES
dc.contributor.author Sánchez Tovar, Rita es_ES
dc.contributor.author Roux, Marie Sophie Beatrice es_ES
dc.date.accessioned 2015-05-07T11:37:18Z
dc.date.available 2015-05-07T11:37:18Z
dc.date.issued 2014-10-01
dc.identifier.issn 0301-4797
dc.identifier.uri http://hdl.handle.net/10251/49869
dc.description.abstract [EN] A stabilization/solidification (S/S) process by using cement was applied to tannery sludge in order to find a safer way of landfilling this waste. The effects of three parameters on the process effectiveness were analysed in terms of leachate toxicity and chromium retention (%). The parameters studied were the relative amount of added water (30e50 wt.%), cement (10e60 wt.% in the solid components), and the use of three different types of cement (clinker with additions of limestone, with additions of limestone and fly ashes, and with additions of pozzolans). Statistical analysis performed by variance analysis and categorical multifactorial tests reveals that all the studied parameters significantly influence the effectiveness of the process. Results showed that chromium retention decreases as the relative amount of cement and water increases, probably due to additional chromium provided by cement and increased in the porosity of the mixtures. Leachate toxicity showed the same minimum value for mixtures with 30% or 40% cement, depending on the type of cement, showing that clinker is the main material responsible for the process effectiveness, and additives (pozzolans or fly ashes) do not improve it. The volume increase is lower as less sludge is replaced by cement and the relative amount of water decreases, and for the cement without additions of fly ashes or pozzolans. Therefore, the latter seems to be the most appropriate cement in spite of being more expensive. This is due to the fact that the minimum toxicity value is achieved with a lower amount of cement; and moreover, the volume increase in the mixtures is lower, minimizing the disposal cost to a landfill. es_ES
dc.description.sponsorship The authors wish to express their gratitude to the tannery facility INCUSA, S.A., to the cement facility CEMEX ESPAÑA, S.A. and to Carles Martínez for his translation assistance.
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Journal of Environmental Management es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Tannery sludge es_ES
dc.subject Stabilization/solidification es_ES
dc.subject Chromium es_ES
dc.subject Toxicity es_ES
dc.subject.classification INGENIERIA QUIMICA es_ES
dc.title The effectiveness of the stabilization/solidification process on the leachability and toxicity of the tannery sludge chromium es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.jenvman.2014.04.026
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Química y Nuclear - Departament d'Enginyeria Química i Nuclear es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Seguridad Industrial, Radiofísica y Medioambiental - Institut de Seguretat Industrial, Radiofísica i Mediambiental es_ES
dc.description.bibliographicCitation Montañés Sanjuan, MT.; Sánchez Tovar, R.; Roux, MSB. (2014). The effectiveness of the stabilization/solidification process on the leachability and toxicity of the tannery sludge chromium. Journal of Environmental Management. 143:71-79. doi:10.1016/j.jenvman.2014.04.026 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.jenvman.2014.04.026 es_ES
dc.description.upvformatpinicio 71 es_ES
dc.description.upvformatpfin 79 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 143 es_ES
dc.relation.senia 278758
dc.identifier.pmid 24879048


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