Removal of heavy metals from acid mine drainage (AMD) using coal fly ash, natural clinker and synthetic zeolites.

2.50
Hdl Handle:
http://hdl.handle.net/2436/30297
Title:
Removal of heavy metals from acid mine drainage (AMD) using coal fly ash, natural clinker and synthetic zeolites.
Authors:
Rios, Carlos A.; Williams, Craig D.; Roberts, Clive L.
Abstract:
Acid mine drainage (AMD) is a widespread environmental problem associated with both working and abandoned mining operations, resulting from the microbial oxidation of pyrite in presence of water and air, affording an acidic solution that contains toxic metal ions. The generation of AMD and release of dissolved heavy metals is an important concern facing the mining industry. The present study aimed at evaluating the use of low-cost sorbents like coal fly ash, natural clinker and synthetic zeolites to clean-up AMD generated at the Parys Mountain copper-lead-zinc deposit, Anglesey (North Wales), and to remove heavy metals and ammonium from AMD. pH played a very important role in the sorption/removal of the contaminants and a higher adsorbent ratio in the treatment of AMD promoted the increase of the pH, particularly using natural clinker-based faujasite (7.70-9.43) and the reduction of metal concentration. Na-phillipsite showed a lower efficiency as compared to that of faujasite. Selectivity of faujasite for metal removal was, in decreasing order, Fe>As>Pb>Zn>Cu>Ni>Cr. Based on these results, the use of these materials has the potential to provide improved methods for the treatment of AMD.
Citation:
Journal of Hazardous Materials, 156(1-3): 23-35
Publisher:
Amsterdam: Elsevier
Journal:
Journal of Hazardous Materials
Issue Date:
2008
URI:
http://hdl.handle.net/2436/30297
DOI:
10.1016/j.jhazmat.2007.11.123
PubMed ID:
18221835
Additional Links:
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGF-4RBYD50-1&_user=10&_coverDate=08%2F15%2F2008&_rdoc=5&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235253%232008%23998439998%23691823%23FLA%23display%23Volume)&_cdi=5253&_sort=d&_docanchor=&_ct=81&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=46c0c4885a55eac290cd2c26a1f2f285
Type:
Article
Language:
en
ISSN:
0304-3894
Appears in Collections:
Plant and Environmental Research Group

Full metadata record

DC FieldValue Language
dc.contributor.authorRios, Carlos A.-
dc.contributor.authorWilliams, Craig D.-
dc.contributor.authorRoberts, Clive L.-
dc.date.accessioned2008-06-23T11:43:21Z-
dc.date.available2008-06-23T11:43:21Z-
dc.date.issued2008-
dc.identifier.citationJournal of Hazardous Materials, 156(1-3): 23-35en
dc.identifier.issn0304-3894-
dc.identifier.pmid18221835-
dc.identifier.doi10.1016/j.jhazmat.2007.11.123-
dc.identifier.urihttp://hdl.handle.net/2436/30297-
dc.description.abstractAcid mine drainage (AMD) is a widespread environmental problem associated with both working and abandoned mining operations, resulting from the microbial oxidation of pyrite in presence of water and air, affording an acidic solution that contains toxic metal ions. The generation of AMD and release of dissolved heavy metals is an important concern facing the mining industry. The present study aimed at evaluating the use of low-cost sorbents like coal fly ash, natural clinker and synthetic zeolites to clean-up AMD generated at the Parys Mountain copper-lead-zinc deposit, Anglesey (North Wales), and to remove heavy metals and ammonium from AMD. pH played a very important role in the sorption/removal of the contaminants and a higher adsorbent ratio in the treatment of AMD promoted the increase of the pH, particularly using natural clinker-based faujasite (7.70-9.43) and the reduction of metal concentration. Na-phillipsite showed a lower efficiency as compared to that of faujasite. Selectivity of faujasite for metal removal was, in decreasing order, Fe>As>Pb>Zn>Cu>Ni>Cr. Based on these results, the use of these materials has the potential to provide improved methods for the treatment of AMD.en
dc.language.isoenen
dc.publisherAmsterdam: Elsevieren
dc.relation.urlhttp://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGF-4RBYD50-1&_user=10&_coverDate=08%2F15%2F2008&_rdoc=5&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235253%232008%23998439998%23691823%23FLA%23display%23Volume)&_cdi=5253&_sort=d&_docanchor=&_ct=81&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=46c0c4885a55eac290cd2c26a1f2f285en
dc.subjectMining industryen
dc.subjectAcid mine drainageen
dc.subjectSorptionen
dc.subjectMetal removalen
dc.subjectSorbentsen
dc.subjectAmmoniumen
dc.subjectHeavy metalsen
dc.subjectZeolitesen
dc.subjectCoal fly ashen
dc.subjectNatural clinkeren
dc.subjectFaujasiteen
dc.subjectEnvironmental pollutionen
dc.subjectHazardous materialsen
dc.titleRemoval of heavy metals from acid mine drainage (AMD) using coal fly ash, natural clinker and synthetic zeolites.en
dc.typeArticleen
dc.identifier.journalJournal of Hazardous Materialsen
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