Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5004/dwt.2017.21417 http://hdl.handle.net/11449/175599 |
Resumo: | Landfill leachate is formed by organic and inorganic toxic compounds. It has high salt concentration and pathogenic organisms that can cause environmental harm. Hydrotalcite, activated carbon and Moringa oleifera seeds have been used for the adsorption of contaminants and the purification of water. In the present study, landfill leachate was submitted to physicochemical and microbiological analysis before and after treatment with these adsorbents. The characterization of the leachate revealed a small number of heterotrophic bacteria and fungi. Total coliforms and Escherichia coli reached mean values of 17,900 and 890 NMP/100 mL, respectively. The physicochemical analysis indicated high conductivity, color, turbidity, chemical oxygen demand (COD), biochemical oxygen demand in 5 d, ammonia, boron, sodium and chlorides. Treatment with hydrotalcite produced the best results regarding the improvement in these variables, but led to an increase in pH. Reused hydrotalcite (Hr) provided reasonable results, but with less efficiency than hydrotalcite. Moreover, Hr failed to remove boron and aluminum and magnesium levels increased. In addition, 4% activated carbon (AC4%) obtained better results regarding color and COD, but failed to remove boron and ammonia efficiently and 1% activated carbon achieved similar results to AC4%, but with lower degrees of removal. M. oleífera seed and extract achieved unsatisfactory results. All adsorbents, except M. oleifera extract, decreased the amount of heterotrophic bacteria approximately 10-fold. Total coliforms and E. coli did not resist the treatments. None of the adsorbents removed sodium, chloride or the toxicity of the leachate. |
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Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachateActivated carbonBoron adsorptionHydrotalciteLandfill leachateMoringa oleiferaLandfill leachate is formed by organic and inorganic toxic compounds. It has high salt concentration and pathogenic organisms that can cause environmental harm. Hydrotalcite, activated carbon and Moringa oleifera seeds have been used for the adsorption of contaminants and the purification of water. In the present study, landfill leachate was submitted to physicochemical and microbiological analysis before and after treatment with these adsorbents. The characterization of the leachate revealed a small number of heterotrophic bacteria and fungi. Total coliforms and Escherichia coli reached mean values of 17,900 and 890 NMP/100 mL, respectively. The physicochemical analysis indicated high conductivity, color, turbidity, chemical oxygen demand (COD), biochemical oxygen demand in 5 d, ammonia, boron, sodium and chlorides. Treatment with hydrotalcite produced the best results regarding the improvement in these variables, but led to an increase in pH. Reused hydrotalcite (Hr) provided reasonable results, but with less efficiency than hydrotalcite. Moreover, Hr failed to remove boron and aluminum and magnesium levels increased. In addition, 4% activated carbon (AC4%) obtained better results regarding color and COD, but failed to remove boron and ammonia efficiently and 1% activated carbon achieved similar results to AC4%, but with lower degrees of removal. M. oleífera seed and extract achieved unsatisfactory results. All adsorbents, except M. oleifera extract, decreased the amount of heterotrophic bacteria approximately 10-fold. Total coliforms and E. coli did not resist the treatments. None of the adsorbents removed sodium, chloride or the toxicity of the leachate.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Department of Biochemistry and Microbiology Institute of Biosciences São Paulo State University UNESP, Av. 24A, no. 1515, Bela VistaDepartment of Biochemistry and Microbiology Institute of Biosciences São Paulo State University UNESP, Av. 24A, no. 1515, Bela VistaUniversidade Estadual Paulista (Unesp)de Almeida, Nair Conde [UNESP]de Oliveira, Valdenilson José Alves [UNESP]de Angelis, Dejanira de Franceschi [UNESP]2018-12-11T17:16:38Z2018-12-11T17:16:38Z2017-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article220-230application/pdfhttp://dx.doi.org/10.5004/dwt.2017.21417Desalination and Water Treatment, v. 90, p. 220-230.1944-39861944-3994http://hdl.handle.net/11449/17559910.5004/dwt.2017.214172-s2.0-850370529102-s2.0-85037052910.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengDesalination and Water Treatment0,3980,398info:eu-repo/semantics/openAccess2023-12-31T06:22:50Zoai:repositorio.unesp.br:11449/175599Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:49:11.702582Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate |
title |
Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate |
spellingShingle |
Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate de Almeida, Nair Conde [UNESP] Activated carbon Boron adsorption Hydrotalcite Landfill leachate Moringa oleifera |
title_short |
Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate |
title_full |
Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate |
title_fullStr |
Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate |
title_full_unstemmed |
Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate |
title_sort |
Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate |
author |
de Almeida, Nair Conde [UNESP] |
author_facet |
de Almeida, Nair Conde [UNESP] de Oliveira, Valdenilson José Alves [UNESP] de Angelis, Dejanira de Franceschi [UNESP] |
author_role |
author |
author2 |
de Oliveira, Valdenilson José Alves [UNESP] de Angelis, Dejanira de Franceschi [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
de Almeida, Nair Conde [UNESP] de Oliveira, Valdenilson José Alves [UNESP] de Angelis, Dejanira de Franceschi [UNESP] |
dc.subject.por.fl_str_mv |
Activated carbon Boron adsorption Hydrotalcite Landfill leachate Moringa oleifera |
topic |
Activated carbon Boron adsorption Hydrotalcite Landfill leachate Moringa oleifera |
description |
Landfill leachate is formed by organic and inorganic toxic compounds. It has high salt concentration and pathogenic organisms that can cause environmental harm. Hydrotalcite, activated carbon and Moringa oleifera seeds have been used for the adsorption of contaminants and the purification of water. In the present study, landfill leachate was submitted to physicochemical and microbiological analysis before and after treatment with these adsorbents. The characterization of the leachate revealed a small number of heterotrophic bacteria and fungi. Total coliforms and Escherichia coli reached mean values of 17,900 and 890 NMP/100 mL, respectively. The physicochemical analysis indicated high conductivity, color, turbidity, chemical oxygen demand (COD), biochemical oxygen demand in 5 d, ammonia, boron, sodium and chlorides. Treatment with hydrotalcite produced the best results regarding the improvement in these variables, but led to an increase in pH. Reused hydrotalcite (Hr) provided reasonable results, but with less efficiency than hydrotalcite. Moreover, Hr failed to remove boron and aluminum and magnesium levels increased. In addition, 4% activated carbon (AC4%) obtained better results regarding color and COD, but failed to remove boron and ammonia efficiently and 1% activated carbon achieved similar results to AC4%, but with lower degrees of removal. M. oleífera seed and extract achieved unsatisfactory results. All adsorbents, except M. oleifera extract, decreased the amount of heterotrophic bacteria approximately 10-fold. Total coliforms and E. coli did not resist the treatments. None of the adsorbents removed sodium, chloride or the toxicity of the leachate. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-09-01 2018-12-11T17:16:38Z 2018-12-11T17:16:38Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.5004/dwt.2017.21417 Desalination and Water Treatment, v. 90, p. 220-230. 1944-3986 1944-3994 http://hdl.handle.net/11449/175599 10.5004/dwt.2017.21417 2-s2.0-85037052910 2-s2.0-85037052910.pdf |
url |
http://dx.doi.org/10.5004/dwt.2017.21417 http://hdl.handle.net/11449/175599 |
identifier_str_mv |
Desalination and Water Treatment, v. 90, p. 220-230. 1944-3986 1944-3994 10.5004/dwt.2017.21417 2-s2.0-85037052910 2-s2.0-85037052910.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Desalination and Water Treatment 0,398 0,398 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
220-230 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129361521410048 |