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Enhanced removal of trace Cr(VI) ions from aqueous solution by titanium oxide-Ag composite adsorbents.
J Hazard Mater. 2011 Jun 15; 190(1-3):723-8.JH

Abstract

Titanium oxide-Ag composite (TOAC) adsorbents were prepared by a facile solution route with Ag nanoparticles being homogeneously dispersed on layered titanium oxide materials. The as-synthesized TOAC exhibited a remarkable capability for trace Cr(VI) removal from an aqueous solution, where the concentration of Cr(VI) could be decreased to a level below 0.05 mg/L within 1h. We have systematically investigated the factors that influenced the adsorption of Cr(VI), for example, the pH value of the solution, and the contact time of TOAC with Cr(VI). We found that the adsorption of Cr(VI) was strongly pH-dependent. The adsorption behavior of Cr(VI) onto TOAC fitted well the Langmuir isotherm and a maximum adsorption capacity of Cr(VI) as 25.7 mg/g was achieved. The adsorption process followed the pseudo-second-order kinetic model, which implied that the adsorption was composed of two steps: the adsorption of Cr(VI) ions onto TOAC followed by the reduction of Cr(VI) to Cr(III) by Ag nanoparticles. Our results revealed that TOAC with high capacity of Cr(VI) removal had promising potential for wastewater treatment.

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Authors+Show Affiliations

Liu SS
Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructure, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, PR China.
Chen YZ
No affiliation info available
De Zhang L
No affiliation info available
Hua GM
No affiliation info available
Xu W
No affiliation info available
Li N
No affiliation info available
Zhang Y
No affiliation info available

MeSH

AdsorptionChromiumHydrogen-Ion ConcentrationKineticsMetal NanoparticlesSilverSolutionsTitaniumWater Pollutants, ChemicalWater Purification

Pub Type(s)

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

Language

eng

PubMed ID

21514991

Citation

Liu, Si Si, et al. "Enhanced Removal of Trace Cr(VI) Ions From Aqueous Solution By Titanium oxide-Ag Composite Adsorbents." Journal of Hazardous Materials, vol. 190, no. 1-3, 2011, pp. 723-8.
Liu SS, Chen YZ, De Zhang L, et al. Enhanced removal of trace Cr(VI) ions from aqueous solution by titanium oxide-Ag composite adsorbents. J Hazard Mater. 2011;190(1-3):723-8.
Liu, S. S., Chen, Y. Z., De Zhang, L., Hua, G. M., Xu, W., Li, N., & Zhang, Y. (2011). Enhanced removal of trace Cr(VI) ions from aqueous solution by titanium oxide-Ag composite adsorbents. Journal of Hazardous Materials, 190(1-3), 723-8. https://doi.org/10.1016/j.jhazmat.2011.03.114
Liu SS, et al. Enhanced Removal of Trace Cr(VI) Ions From Aqueous Solution By Titanium oxide-Ag Composite Adsorbents. J Hazard Mater. 2011 Jun 15;190(1-3):723-8. PubMed PMID: 21514991.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced removal of trace Cr(VI) ions from aqueous solution by titanium oxide-Ag composite adsorbents. AU - Liu,Si Si, AU - Chen,Yong Zhou, AU - De Zhang,Li, AU - Hua,Guo Min, AU - Xu,Wei, AU - Li,Nian, AU - Zhang,Ye, Y1 - 2011/04/08/ PY - 2010/12/20/received PY - 2011/03/29/revised PY - 2011/03/29/accepted PY - 2011/4/26/entrez PY - 2011/4/26/pubmed PY - 2011/9/29/medline SP - 723 EP - 8 JF - Journal of hazardous materials JO - J Hazard Mater VL - 190 IS - 1-3 N2 - Titanium oxide-Ag composite (TOAC) adsorbents were prepared by a facile solution route with Ag nanoparticles being homogeneously dispersed on layered titanium oxide materials. The as-synthesized TOAC exhibited a remarkable capability for trace Cr(VI) removal from an aqueous solution, where the concentration of Cr(VI) could be decreased to a level below 0.05 mg/L within 1h. We have systematically investigated the factors that influenced the adsorption of Cr(VI), for example, the pH value of the solution, and the contact time of TOAC with Cr(VI). We found that the adsorption of Cr(VI) was strongly pH-dependent. The adsorption behavior of Cr(VI) onto TOAC fitted well the Langmuir isotherm and a maximum adsorption capacity of Cr(VI) as 25.7 mg/g was achieved. The adsorption process followed the pseudo-second-order kinetic model, which implied that the adsorption was composed of two steps: the adsorption of Cr(VI) ions onto TOAC followed by the reduction of Cr(VI) to Cr(III) by Ag nanoparticles. Our results revealed that TOAC with high capacity of Cr(VI) removal had promising potential for wastewater treatment. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/21514991/Enhanced_removal_of_trace_Cr_VI__ions_from_aqueous_solution_by_titanium_oxide_Ag_composite_adsorbents_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(11)00430-4 DB - PRIME DP - Unbound Medicine ER -