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dc.contributor.author
Alchouron, Jacinta
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dc.contributor.author
Navarathna, Chanaka M.
dc.contributor.author
Chludil, Hugo Daniel
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dc.contributor.author
Dewage, Narada B.
dc.contributor.author
Perez, Felio
dc.contributor.author
Hassan, El Barbary
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dc.contributor.author
Pittman Jr., Charles U.
dc.contributor.author
Vega, Andrea Susana
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dc.contributor.author
Mlsna, Todd E.
dc.date.available
2021-03-12T14:19:58Z
dc.date.issued
2020-03-01
dc.identifier.citation
Alchouron, Jacinta; Navarathna, Chanaka M.; Chludil, Hugo Daniel; Dewage, Narada B.; Perez, Felio; et al.; Assessing South American Guadua chacoensis bamboo biochar and Fe3O4 nanoparticle dispersed analogues for aqueous arsenic(V) remediation; Elsevier; Science of the Total Environment; 706; 135943; 1-3-2020; 1-15
dc.identifier.issn
0048-9697
dc.identifier.uri
http://hdl.handle.net/11336/128214
dc.description.abstract
Discarded bamboo culms of Guadua chacoensis were used for biochar remediation of aqueous As(V). Raw biochar (BC), activated biochar (BCA), raw Fe3O4 nanoparticle-covered biochar (BC-Fe), and activated biochar covered with Fe3O4 nanoparticles (BCA-Fe) were prepared, characterized and tested for As(V) aqueous adsorption. The goal is to develop an economic, viable, and sustainable adsorbent to provide safe arsenic-free water. Adsorbents were characterized using scanning electron microscopy (SEM) and energy dispersive analysis by X-ray (SEMEDX), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (TEM-EDS), X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), Brunauer-Emmett-Teller surface area measurements (SBET), point of zero charge determinations (PZC), and elemental analysis. Activation with KOH increased the O/C ratio and the surface area of BC from 6.7 m2 /g to 1239.7 m2 /g (BCA). As(V) sorption equilibrium was achieved within b2 h for all four adsorbents and kinetics followed the pseudo-second-order model. At a 10 mg/L initial As(V) concentration, BC-Fe achieved a 100% removal (5 mg/g) over a pH 5 to 9 window. Sorption was endothermic on all four adsorbents and the capacities rose with the increasing temperature. Langmuir capacities at 40 °C for BC, BCA, BC-Fe, and BCA-Fe were 256, 217, 457, and 868 mg/g, respectively, and capacities were compared with other sorbents. Breakthrough fixed-bed column sorption was carried out for BC and BCFe producing 6.6 mg/g and 13.9 mg/g bed capacities, respectively. Potassium phosphate was a better As stripping agent than sodium bicarbonate. Performance of the adsorbents in an As(V)-spiked natural water and a naturally As(V)-contaminated domestic water were assessed. Robust arsenate sequestration occurred generating As-safe water (As b0.01 mg/L), despite the presence of competing ions. Stoichiometric precipitation of iron-arsenate complexes triggered by iron dissolution was also established.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ARSENIC(V)
dc.subject
BAMBOO BIOCHAR
dc.subject
FE3O4 NANOPARTICLE-COVERED
dc.subject
MULTIPHASE ADSORBENT
dc.subject
WATER REMEDIATION
dc.subject.classification
Química Orgánica
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Assessing South American Guadua chacoensis bamboo biochar and Fe3O4 nanoparticle dispersed analogues for aqueous arsenic(V) remediation
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-03-05T18:47:56Z
dc.journal.volume
706
dc.journal.number
135943
dc.journal.pagination
1-15
dc.journal.pais
Países Bajos
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dc.description.fil
Fil: Alchouron, Jacinta. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica General; Argentina
dc.description.fil
Fil: Navarathna, Chanaka M.. Mississippi State University; Estados Unidos
dc.description.fil
Fil: Chludil, Hugo Daniel. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Biología Aplicada y Alimentos. Cátedra de Química de Biomoléculas; Argentina
dc.description.fil
Fil: Dewage, Narada B.. Mississippi State University; Estados Unidos
dc.description.fil
Fil: Perez, Felio. University of Memphis; Estados Unidos
dc.description.fil
Fil: Hassan, El Barbary. Mississippi State University; Estados Unidos
dc.description.fil
Fil: Pittman Jr., Charles U.. Mississippi State University; Estados Unidos
dc.description.fil
Fil: Vega, Andrea Susana. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Botánica General; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Mlsna, Todd E.. Mississippi State University; Estados Unidos
dc.journal.title
Science of the Total Environment
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0048969719359388
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.scitotenv.2019.135943
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