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Effective aqueous arsenic removal using zero valent iron doped MWCNT synthesized by in situ CVD method using natural α-Fe2O3 as a precursor.
Chemosphere. 2017 Mar; 171:502-511.C

Abstract

This research presents an efficient system for removing aqua's arsenic based on in situ zero valent iron doping onto multiwall carbon nanotube (MWCNT) through MWCNT growth onto the natural α-Fe2O3 surface in chemical vapor deposition (CVD) reactor. The as-synthesized magnetic nanohybrid was characterized by XRD, VSM, FE-SEM and TEM techniques. The result of XRD analysis revealed that MWCNT has been successfully generated on the surface of zero valent iron. Moreover, the material showed good superparamagnetic characteristic to be employed as a magnetic adsorbent. The hematite, nanohybrid and its air oxidized form were used for removing aqueous arsenite and arsenate; however, non oxidized material exhibited greater efficiency for the analytes uptake. Equilibrium times were 60 and 90 min for arsenate and arsenite adsorption using nanohybrid and oxidized sorbent but the equilibrium time was 1320 min using hematite. The adsorption efficiencies of hematite and oxidized sorbent were 18, 74% and 26, 77% for arsenite and arsenate, respectively, at initial concentration of 10 mg L-1. At this situation, the removal efficiencies were 96 and 98.5% for arsenite and arsenate adsorption using raw nanohybrid. Thermodynamic study was also performed and results indicated that arsenic adsorption onto nanohybrid and oxidized sorbent was spontaneous however hematite followed a nonspontaneous path for the arsenic removal.

Authors+Show Affiliations

Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box 15875-4413, Tehran, Iran.Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box 15875-4413, Tehran, Iran. Electronic address: shariati@aut.ac.ir.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28038422

Citation

Alijani, Hassan, and Zahra Shariatinia. "Effective Aqueous Arsenic Removal Using Zero Valent Iron Doped MWCNT Synthesized By in Situ CVD Method Using Natural α-Fe2O3 as a Precursor." Chemosphere, vol. 171, 2017, pp. 502-511.
Alijani H, Shariatinia Z. Effective aqueous arsenic removal using zero valent iron doped MWCNT synthesized by in situ CVD method using natural α-Fe2O3 as a precursor. Chemosphere. 2017;171:502-511.
Alijani, H., & Shariatinia, Z. (2017). Effective aqueous arsenic removal using zero valent iron doped MWCNT synthesized by in situ CVD method using natural α-Fe2O3 as a precursor. Chemosphere, 171, 502-511. https://doi.org/10.1016/j.chemosphere.2016.12.106
Alijani H, Shariatinia Z. Effective Aqueous Arsenic Removal Using Zero Valent Iron Doped MWCNT Synthesized By in Situ CVD Method Using Natural α-Fe2O3 as a Precursor. Chemosphere. 2017;171:502-511. PubMed PMID: 28038422.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effective aqueous arsenic removal using zero valent iron doped MWCNT synthesized by in situ CVD method using natural α-Fe2O3 as a precursor. AU - Alijani,Hassan, AU - Shariatinia,Zahra, Y1 - 2016/12/23/ PY - 2016/10/18/received PY - 2016/12/09/revised PY - 2016/12/21/accepted PY - 2016/12/31/pubmed PY - 2017/4/28/medline PY - 2016/12/31/entrez KW - Arsenic removal KW - Chemical vapor deposition KW - ICP–AES KW - Multiwall carbon nanotube KW - TEM SP - 502 EP - 511 JF - Chemosphere JO - Chemosphere VL - 171 N2 - This research presents an efficient system for removing aqua's arsenic based on in situ zero valent iron doping onto multiwall carbon nanotube (MWCNT) through MWCNT growth onto the natural α-Fe2O3 surface in chemical vapor deposition (CVD) reactor. The as-synthesized magnetic nanohybrid was characterized by XRD, VSM, FE-SEM and TEM techniques. The result of XRD analysis revealed that MWCNT has been successfully generated on the surface of zero valent iron. Moreover, the material showed good superparamagnetic characteristic to be employed as a magnetic adsorbent. The hematite, nanohybrid and its air oxidized form were used for removing aqueous arsenite and arsenate; however, non oxidized material exhibited greater efficiency for the analytes uptake. Equilibrium times were 60 and 90 min for arsenate and arsenite adsorption using nanohybrid and oxidized sorbent but the equilibrium time was 1320 min using hematite. The adsorption efficiencies of hematite and oxidized sorbent were 18, 74% and 26, 77% for arsenite and arsenate, respectively, at initial concentration of 10 mg L-1. At this situation, the removal efficiencies were 96 and 98.5% for arsenite and arsenate adsorption using raw nanohybrid. Thermodynamic study was also performed and results indicated that arsenic adsorption onto nanohybrid and oxidized sorbent was spontaneous however hematite followed a nonspontaneous path for the arsenic removal. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/28038422/Effective_aqueous_arsenic_removal_using_zero_valent_iron_doped_MWCNT_synthesized_by_in_situ_CVD_method_using_natural_α_Fe2O3_as_a_precursor_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(16)31838-0 DB - PRIME DP - Unbound Medicine ER -