Comparison of the adsorptive action of hydrotalcite, Moringa oleifera and activated carbon in the treatment of landfill leachate

Detalhes bibliográficos
Autor(a) principal: de Almeida, Nair Conde [UNESP]
Data de Publicação: 2017
Outros Autores: de Oliveira, Valdenilson José Alves [UNESP], de Angelis, Dejanira de Franceschi [UNESP]
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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spelling 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
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