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Arsenite removal from aqueous solutions by γ-Fe2O3-TiO2 magnetic nanoparticles through simultaneous photocatalytic oxidation and adsorption.
J Hazard Mater. 2013 Feb 15; 246-247:10-7.JH

Abstract

A novel Fe-Ti binary oxide magnetic nanoparticles which combined the photocatalytic oxidation property of TiO(2) and the high adsorption capacity and magnetic property of γ-Fe(2)O(3) have been synthesized using a coprecipitation and simultaneous oxidation method. The as-prepared samples were characterized by powder XRD, TEM, TG-DTA, VSM and BET methods. Photocatalytic oxidation of arsenite, the effect of solution pH values and initial As(III) concentration on arsenite removal were investigated in laboratory experiments. Batch experimental results showed that under UV light, As(III) can be efficiently oxidized to As(V) by dissolved O(2) in γ-Fe(2)O(3)-TiO(2) nanoparticle suspensions at various pH values. At the same time, As(V) was effectively removed by adsorption onto the surface of nanoparticles. The maximum removal capability of the nano-material for arsenite was 33.03 mg/g at pH 7.0. Among all the common coexisting ions investigated, phosphate was the greatest competitor with arsenic for adsorptive sites on the nano-material. Regeneration studies verified that the γ-Fe(2)O(3)-TiO(2) nanoparticles, which underwent five successive adsorption-desorption processes, still retained comparable catalysis and adsorption performance, indicating the excellent stability of the nanoparticles. The excellent photocatalytic oxidation performance and high uptake capability of the magnetic nano-material make it potentially attractive material for the removal of As(III) from water.

Authors+Show Affiliations

State key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23276789

Citation

Yu, Lian, et al. "Arsenite Removal From Aqueous Solutions By γ-Fe2O3-TiO2 Magnetic Nanoparticles Through Simultaneous Photocatalytic Oxidation and Adsorption." Journal of Hazardous Materials, vol. 246-247, 2013, pp. 10-7.
Yu L, Peng X, Ni F, et al. Arsenite removal from aqueous solutions by γ-Fe2O3-TiO2 magnetic nanoparticles through simultaneous photocatalytic oxidation and adsorption. J Hazard Mater. 2013;246-247:10-7.
Yu, L., Peng, X., Ni, F., Li, J., Wang, D., & Luan, Z. (2013). Arsenite removal from aqueous solutions by γ-Fe2O3-TiO2 magnetic nanoparticles through simultaneous photocatalytic oxidation and adsorption. Journal of Hazardous Materials, 246-247, 10-7. https://doi.org/10.1016/j.jhazmat.2012.12.007
Yu L, et al. Arsenite Removal From Aqueous Solutions By γ-Fe2O3-TiO2 Magnetic Nanoparticles Through Simultaneous Photocatalytic Oxidation and Adsorption. J Hazard Mater. 2013 Feb 15;246-247:10-7. PubMed PMID: 23276789.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Arsenite removal from aqueous solutions by γ-Fe2O3-TiO2 magnetic nanoparticles through simultaneous photocatalytic oxidation and adsorption. AU - Yu,Lian, AU - Peng,Xianjia, AU - Ni,Fan, AU - Li,Jin, AU - Wang,Dongsheng, AU - Luan,Zhaokun, Y1 - 2012/12/10/ PY - 2012/06/21/received PY - 2012/10/15/revised PY - 2012/12/02/accepted PY - 2013/1/2/entrez PY - 2013/1/2/pubmed PY - 2013/9/11/medline SP - 10 EP - 7 JF - Journal of hazardous materials JO - J Hazard Mater VL - 246-247 N2 - A novel Fe-Ti binary oxide magnetic nanoparticles which combined the photocatalytic oxidation property of TiO(2) and the high adsorption capacity and magnetic property of γ-Fe(2)O(3) have been synthesized using a coprecipitation and simultaneous oxidation method. The as-prepared samples were characterized by powder XRD, TEM, TG-DTA, VSM and BET methods. Photocatalytic oxidation of arsenite, the effect of solution pH values and initial As(III) concentration on arsenite removal were investigated in laboratory experiments. Batch experimental results showed that under UV light, As(III) can be efficiently oxidized to As(V) by dissolved O(2) in γ-Fe(2)O(3)-TiO(2) nanoparticle suspensions at various pH values. At the same time, As(V) was effectively removed by adsorption onto the surface of nanoparticles. The maximum removal capability of the nano-material for arsenite was 33.03 mg/g at pH 7.0. Among all the common coexisting ions investigated, phosphate was the greatest competitor with arsenic for adsorptive sites on the nano-material. Regeneration studies verified that the γ-Fe(2)O(3)-TiO(2) nanoparticles, which underwent five successive adsorption-desorption processes, still retained comparable catalysis and adsorption performance, indicating the excellent stability of the nanoparticles. The excellent photocatalytic oxidation performance and high uptake capability of the magnetic nano-material make it potentially attractive material for the removal of As(III) from water. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/23276789/Arsenite_removal_from_aqueous_solutions_by_γ_Fe2O3_TiO2_magnetic_nanoparticles_through_simultaneous_photocatalytic_oxidation_and_adsorption_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(12)01172-7 DB - PRIME DP - Unbound Medicine ER -