Publication
Start-up, adjustment and long-term performance of a two-stage bioremediation process, treating real acid mine drainage, coupled with biosynthesis of ZnS nanoparticles and ZnS/TiO2 nanocomposites
| dc.contributor.author | Vitor, G. | |
| dc.contributor.author | Palma, T. C. | |
| dc.contributor.author | Vieira, Bernardete | |
| dc.contributor.author | Lourenço, J. P. | |
| dc.contributor.author | Barros, R. J. | |
| dc.contributor.author | Costa, Maria Clara | |
| dc.date.accessioned | 2016-02-25T18:11:39Z | |
| dc.date.available | 2016-02-25T18:11:39Z | |
| dc.date.issued | 2015 | |
| dc.description.abstract | Acid mine drainage (AMD) generation is a widespread environmental problem in Europe, including Portugal. Previous experience has shown that a combined process consisting of an anaerobic sulphate-reducing bioreactor, following neutralization with calcite tailing, produces water complying with legal irrigation requirements from synthetic AMD. Aiming the treatment of real AMD a new bioreactor was inoculated with a SRB enrichment obtained from sludge from a local WWTP anaerobic lagoon. In the initial batch phase, sulphate supplementation was needed to achieve high sulphate-reducing bacteria counts before continuous feeding of AMD was started. The system quickly achieved good performance, proving it is easy to start-up. However, this time the neutralization step failed to keep bioreactor affluent pH higher than 5 for longer than three weeks. This was due to armouring of calcite by precipitates of various metals present in AMD. A new configuration, replacing a packed-bed column by a shallow contact basin, proved to be more robust, avoiding clogging, short-circuiting and providing long-term neutralization. The treated effluent, with excess of biologically generated sulphide, was successfully used to synthesize zinc sulphide nanoparticles, both in pure form and as a ZnS/TiO2 nanocomposite, thus proving the feasibility of coupling an AMD bioremediation system with the synthesis of metal sulphide nanoparticles and nanocomposites. | pt_PT |
| dc.identifier.doi | https//dx.doi.org/10.1016/j.mineng.2014.003 | pt_PT |
| dc.identifier.issn | 0892-6875 | |
| dc.identifier.other | AUT: JLO01215; | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/7752 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | Elsevier | pt_PT |
| dc.relation.publisherversion | http://www.sciencedirect.com/science/article/pii/S0892687514003999 | pt_PT |
| dc.subject | Bioremediation | pt_PT |
| dc.subject | Acid mine drainage | pt_PT |
| dc.subject | Sulphate-reducing bacteria | pt_PT |
| dc.subject | ZnS nanoparticles | pt_PT |
| dc.subject | ZnS/TiO2 nanocomposites | pt_PT |
| dc.title | Start-up, adjustment and long-term performance of a two-stage bioremediation process, treating real acid mine drainage, coupled with biosynthesis of ZnS nanoparticles and ZnS/TiO2 nanocomposites | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 93 | pt_PT |
| oaire.citation.startPage | 85 | pt_PT |
| oaire.citation.title | Minerals Engineering | pt_PT |
| oaire.citation.volume | 75 | pt_PT |
| person.familyName | Vieira | |
| person.familyName | Lourenço | |
| person.familyName | Costa | |
| person.givenName | Bernardete | |
| person.givenName | João P. | |
| person.givenName | Maria Clara | |
| person.identifier | 634248 | |
| person.identifier.ciencia-id | F81F-A1F0-2A7C | |
| person.identifier.ciencia-id | 7110-A28E-3C8A | |
| person.identifier.orcid | 0000-0002-6284-006X | |
| person.identifier.orcid | 0000-0002-0501-6672 | |
| person.identifier.orcid | 0000-0003-1340-5237 | |
| person.identifier.rid | A-7758-2008 | |
| person.identifier.rid | M-6189-2013 | |
| person.identifier.scopus-author-id | 57195730600 | |
| person.identifier.scopus-author-id | 35354952400 | |
| rcaap.rights | restrictedAccess | pt_PT |
| rcaap.type | article | pt_PT |
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