Publicação
Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps
| Resumo: | The relationships between clay minerals and associated iron and arsenic-rich phases are a main scientific issue in reactive mine waste-dumps. Therefore, this paper documents the composition and morphology of the fine fraction (<2 μm), including the nano-sized Fe and As precipitates, associated with clay minerals in three distinctive sulfide-rich waste-dumps: Cerdeirinha, Lapa Grande, and Penedono (Northern Portugal). The obtained results indicated that the study sites have similar relative proportions of the detrital materials. However, major differences were observed in the remainder phases, which is in accordance with the mineralogy that was inherited from the respective ore deposits. In general, the clay mineral assemblage is dominated by the presence of illite, halloysite(7 Å), and beidellite. There are also associated minerals, such as jarosite and goethite, as well as amorphous As-rich nanoprecipitates with specific morphologies. Moreover, the results suggested that AMD conditions control the physical–chemical transformations, namely constraining the stability of the secondary phases formed by weathering in the waste dumps. Acidity is responsible for the degradation of the clay minerals, which is reflected in their crystalochemistry, structural order–disorder, and morphology. On the contrary, jarosite is more stable, being a dominant mineral in such environmental conditions. The stability of amorphous ferric arsenates or its evolution to a more crystalline phase is dependent on the Fe:As ratio, which is lower in Penedono. The study of the secondary products, especially the nanoparticles, puts in evidence their ability to control the mobility of trace elements, suggesting potential applications in environmental technology, including remediation of reactive mine waste-dumps. |
|---|---|
| Autores principais: | Valente, Teresa Maria Fernandes |
| Outros Autores: | Gomes, Patrícia; Braga, Maria Amália Castro Sequeira; Dionísio, Amélia; Pamplona, J.; Grande, J. A. |
| Assunto: | Halloysite(7 Å) Beidellite Jarosite Goethite As-Fe-rich nanoparticles Mine waste -dumps Halloysite(7 angstrom) |
| Ano: | 2015 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1866875798097494016 |
|---|---|
| author | Valente, Teresa Maria Fernandes |
| author2 | Gomes, Patrícia Braga, Maria Amália Castro Sequeira Dionísio, Amélia Pamplona, J. Grande, J. A. |
| author2_role | author author author author author |
| author_facet | Valente, Teresa Maria Fernandes Gomes, Patrícia Braga, Maria Amália Castro Sequeira Dionísio, Amélia Pamplona, J. Grande, J. A. |
| author_role | author |
| contributor_name_str_mv | Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Valente, Teresa Maria Fernandes\"},{\"Person.name\":\"Gomes, Patrícia\"},{\"Person.name\":\"Braga, Maria Amália Castro Sequeira\"},{\"Person.name\":\"Dionísio, Amélia\"},{\"Person.name\":\"Pamplona, J.\"},{\"Person.name\":\"Grande, J. A.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Valente, Teresa Maria Fernandes Gomes, Patrícia Braga, Maria Amália Castro Sequeira Dionísio, Amélia Pamplona, J. Grande, J. A. |
| datacite.date.Accepted.fl_str_mv | 2015-03-25T00:00:00Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | Halloysite(7 Å) Beidellite Jarosite Goethite As-Fe-rich nanoparticles Mine waste -dumps Halloysite(7 angstrom) |
| datacite.titles.title.fl_str_mv | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps |
| dc.contributor.none.fl_str_mv | Universidade do Minho |
| dc.creator.none.fl_str_mv | Valente, Teresa Maria Fernandes Gomes, Patrícia Braga, Maria Amália Castro Sequeira Dionísio, Amélia Pamplona, J. Grande, J. A. |
| dc.date.Accepted.fl_str_mv | 2015-03-25T00:00:00Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/45608 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | Halloysite(7 Å) Beidellite Jarosite Goethite As-Fe-rich nanoparticles Mine waste -dumps Halloysite(7 angstrom) |
| dc.title.fl_str_mv | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | The relationships between clay minerals and associated iron and arsenic-rich phases are a main scientific issue in reactive mine waste-dumps. Therefore, this paper documents the composition and morphology of the fine fraction (<2 μm), including the nano-sized Fe and As precipitates, associated with clay minerals in three distinctive sulfide-rich waste-dumps: Cerdeirinha, Lapa Grande, and Penedono (Northern Portugal). The obtained results indicated that the study sites have similar relative proportions of the detrital materials. However, major differences were observed in the remainder phases, which is in accordance with the mineralogy that was inherited from the respective ore deposits. In general, the clay mineral assemblage is dominated by the presence of illite, halloysite(7 Å), and beidellite. There are also associated minerals, such as jarosite and goethite, as well as amorphous As-rich nanoprecipitates with specific morphologies. Moreover, the results suggested that AMD conditions control the physical–chemical transformations, namely constraining the stability of the secondary phases formed by weathering in the waste dumps. Acidity is responsible for the degradation of the clay minerals, which is reflected in their crystalochemistry, structural order–disorder, and morphology. On the contrary, jarosite is more stable, being a dominant mineral in such environmental conditions. The stability of amorphous ferric arsenates or its evolution to a more crystalline phase is dependent on the Fe:As ratio, which is lower in Penedono. The study of the secondary products, especially the nanoparticles, puts in evidence their ability to control the mobility of trace elements, suggesting potential applications in environmental technology, including remediation of reactive mine waste-dumps. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | article |
| fulltext.url.fl_str_mv | https://prod-dspace.uminho.pt/bitstreams/0996d16b-de46-4d36-a18e-51bc1a684dab/download |
| id | rum_3d0a4a4ac970024c7cf3e7acfba74c19 |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/45608 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/45608 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Valente, Teresa Maria Fernandes Gomes, Patrícia Braga, Maria Amália Castro Sequeira Dionísio, Amélia Pamplona, J. Grande, J. A. |
| publishDate | 2015 |
| publisher.none.fl_str_mv | Elsevier |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engElsevierporThe relationships between clay minerals and associated iron and arsenic-rich phases are a main scientific issue in reactive mine waste-dumps. Therefore, this paper documents the composition and morphology of the fine fraction (<2 μm), including the nano-sized Fe and As precipitates, associated with clay minerals in three distinctive sulfide-rich waste-dumps: Cerdeirinha, Lapa Grande, and Penedono (Northern Portugal). The obtained results indicated that the study sites have similar relative proportions of the detrital materials. However, major differences were observed in the remainder phases, which is in accordance with the mineralogy that was inherited from the respective ore deposits. In general, the clay mineral assemblage is dominated by the presence of illite, halloysite(7 Å), and beidellite. There are also associated minerals, such as jarosite and goethite, as well as amorphous As-rich nanoprecipitates with specific morphologies. Moreover, the results suggested that AMD conditions control the physical–chemical transformations, namely constraining the stability of the secondary phases formed by weathering in the waste dumps. Acidity is responsible for the degradation of the clay minerals, which is reflected in their crystalochemistry, structural order–disorder, and morphology. On the contrary, jarosite is more stable, being a dominant mineral in such environmental conditions. The stability of amorphous ferric arsenates or its evolution to a more crystalline phase is dependent on the Fe:As ratio, which is lower in Penedono. The study of the secondary products, especially the nanoparticles, puts in evidence their ability to control the mobility of trace elements, suggesting potential applications in environmental technology, including remediation of reactive mine waste-dumps.application/pdfporIron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumpsValente, Teresa Maria FernandesGomes, PatríciaBraga, Maria Amália Castro SequeiraDionísio, AméliaPamplona, J.Grande, J. A.HostingInstitutionOrganizationalUniversidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISSNIsPartOf0341-8162DOIIsPartOf10.1016/j.catena.2015.03.0092015-03-252014-102015-03-25T00:00:00ZHandlehttps://hdl.handle.net/1822/45608http://purl.org/coar/access_right/c_16ecrestricted accessHalloysite(7 Å)BeidelliteJarositeGoethiteAs-Fe-rich nanoparticlesMine waste -dumpsHalloysite(7 angstrom)2026951 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://prod-dspace.uminho.pt/bitstreams/0996d16b-de46-4d36-a18e-51bc1a684dab/download |
| spellingShingle | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps Valente, Teresa Maria Fernandes Halloysite(7 Å) Beidellite Jarosite Goethite As-Fe-rich nanoparticles Mine waste -dumps Halloysite(7 angstrom) |
| status | SINGLETON |
| subject.fl_str_mv | Halloysite(7 Å) Beidellite Jarosite Goethite As-Fe-rich nanoparticles Mine waste -dumps Halloysite(7 angstrom) |
| title | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps |
| title_full | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps |
| title_fullStr | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps |
| title_full_unstemmed | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps |
| title_short | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps |
| title_sort | Iron and arsenic-rich nanoprecipitates associated with clay minerals in sulfide-rich waste dumps |
| topic | Halloysite(7 Å) Beidellite Jarosite Goethite As-Fe-rich nanoparticles Mine waste -dumps Halloysite(7 angstrom) |
| topic_facet | Halloysite(7 Å) Beidellite Jarosite Goethite As-Fe-rich nanoparticles Mine waste -dumps Halloysite(7 angstrom) |
| url | https://hdl.handle.net/1822/45608 |
| visible | 1 |