Hexavalent Chromium Removal from Aqueous Solutions by Adsorption onto Synthetic Nano Size ZeroValent Iron (nZVI)
The present work was conducted for the synthesis of
nano size zerovalent iron (nZVI) and hexavalent chromium (Cr(VI))
removal as a highly toxic pollutant by using this nanoparticles. Batch
experiments were performed to investigate the effects of Cr(VI),
nZVI concentration, pH of solution and contact time variation on
the removal efficiency of Cr(VI). nZVI was synthesized by
reduction of ferric chloride using sodium borohydrid. SEM and
XRD examinations applied for determination of particle size and
characterization of produced nanoparticles. The results showed that
the removal efficiency decreased with Cr(VI) concentration and pH
of solution and increased with adsorbent dosage and contact time.
The Langmuir and Freundlich isotherm models were used for the
adsorption equilibrium data and the Langmuir isotherm model was
well fitted. Nanoparticle ZVI presented an outstanding ability to
remove Cr(VI) due to high surface area, low particle size and high
inherent activity.
[1] S. Gupta and B. V. Babu, Removal of toxic metal Cr(VI) from aqueous
solutions using sawdust as adsorbent: Equilibrium, kinetics and
regeneration studies. Chemical Engineering Journal, 150, 2009, pp. 352-
365.
[2] M. Kobya, Removal of Cr(VI) from aqueous solutions by adsorption onto
hazelnut shell activated carbon: kinetic and equilibrium studies.
Bioresource Technology, 91, 2004, pp. 317-321.
[3] Y. C. Sharma, Cr(VI) removal from industrial effluents by adsorption on
an indigenous low-cost material. Colloids and Surfaces A:
Physicochemical and Engineering Aspects, 215, 2003, pp. 155-162.
[4] K. Selvi, S. Pattabhi and K. Kadirvelu, Removal of Cr(VI) from aqueous
solution by adsorption onto activated carbon. Kidlington, ROYAUMEUNI:
Elsevier 2001.
[5] D. Kaplan and T. Gilmore, Zero-Valent Iron Removal Rates of Aqueous
Cr(VI) Measured Under Flow Conditions. Water, Air, & Soil Pollution,
155, 2004, pp. 21-33.
[6] N. Shao-feng, L.Yong, X. Xin-hua, and L. Zhang-hua, Removal of
hexavalent chromium from aqueous solution by iron nanoparticles,
Journal of Zhejiang University Science-B, 6(10), 2005, pp. 1022-1027.
[7] Kanel, Sushil Raj, Manning, Bruce, Charlet, Laurent and Choi, Heechul,
Removal of arsenic(III) from groundwater by nanoscale zero-valent iron,
Environ. Sci. Technol, 39, 2005, pp. 1291-1298.
[8] H. Sung, and I. Francis, Nanotechnology for Environmental Remediation,
Springer Science+Business Media, Inc, 2006.
[9] He Feng and Zhao Dongye, Preparation and Characterization of a New
Class of Starch-Stabilized Bimetallic Nanoparticles for Degradation of
Chlorinated Hydrocarbons in Water. Environmental Science &
Technology, 39, 2005, pp. 3314-3320.
[10] APHA, AWWA, WEF, Standard Methods for the Examination of Water
and Wastewater. (19th ed.), Washington DC, APHA, 1998.
[11] Kanel, Sushil Raj, Greneche, Jean-Mark and Choi, Heechul, Arsenic (V)
Removal from Groundwater Using Nano Scale Zero-Valent Iron as a
Colloidal Reactive Barrier Material, Environ. Sci. Technol, 40, 2006, pp.
2045-2050.
[12] M. Ponder Sherman, G. Darab John, E. Mallouk, Thomas, Remediation
of Cr(VI) and Pb(II) Aqueous Solutions Using Supported, Nanoscale
Zero-valent Iron. Environmental Science & Technology, 34, 2000, pp.
2564-2569.
[13] Xue Song Wang, Yu Jun Tang, Li Fang Chen, Fei Yan Li, Wen Ya Wan,
Ye Bin Tan, Removal of Cr(VI) by Zero-valent, Iron-encapsulated
Alginate Beads, 2009, pp. 263-267.
[14] C. K. Lai Keith and M. C. Lo Irene, Removal of Chromium (VI) by Acid-
Washed Zero-Valent Iron under Various Groundwater Geochemistry
Conditions. Environmental Science & Technology, 42, 2008. pp. 1238-
1244.
[15] M.J. Alowitz and M.M. Scherer, Kinetics of nitrate, nitrite, and Cr(VI)
reduction by iron metal. Environ. Sci. Technol. 36, 2002, pp. 299-306.
[16] D. Karabelli, C. Uzum, T. Shahwan, A. E. Eroglu, T. B. Scott, K. R.
Hallam, Batch Removal of Aqueous Cu2+ Ions Using Nanoparticles of
Zero-Valent Iron: A Study of the Capacity and Mechanism of Uptake.
Industrial & Engineering Chemistry Research, 47, 2008, pp. 4758-4764.
[17] K.K.H, Choy, G. McKay and JF Porter, Sorption of acid dyes from
effluents using activated carbon. Resour. Conserv. Recycl, 27, 1999, pp.
57-71.
[1] S. Gupta and B. V. Babu, Removal of toxic metal Cr(VI) from aqueous
solutions using sawdust as adsorbent: Equilibrium, kinetics and
regeneration studies. Chemical Engineering Journal, 150, 2009, pp. 352-
365.
[2] M. Kobya, Removal of Cr(VI) from aqueous solutions by adsorption onto
hazelnut shell activated carbon: kinetic and equilibrium studies.
Bioresource Technology, 91, 2004, pp. 317-321.
[3] Y. C. Sharma, Cr(VI) removal from industrial effluents by adsorption on
an indigenous low-cost material. Colloids and Surfaces A:
Physicochemical and Engineering Aspects, 215, 2003, pp. 155-162.
[4] K. Selvi, S. Pattabhi and K. Kadirvelu, Removal of Cr(VI) from aqueous
solution by adsorption onto activated carbon. Kidlington, ROYAUMEUNI:
Elsevier 2001.
[5] D. Kaplan and T. Gilmore, Zero-Valent Iron Removal Rates of Aqueous
Cr(VI) Measured Under Flow Conditions. Water, Air, & Soil Pollution,
155, 2004, pp. 21-33.
[6] N. Shao-feng, L.Yong, X. Xin-hua, and L. Zhang-hua, Removal of
hexavalent chromium from aqueous solution by iron nanoparticles,
Journal of Zhejiang University Science-B, 6(10), 2005, pp. 1022-1027.
[7] Kanel, Sushil Raj, Manning, Bruce, Charlet, Laurent and Choi, Heechul,
Removal of arsenic(III) from groundwater by nanoscale zero-valent iron,
Environ. Sci. Technol, 39, 2005, pp. 1291-1298.
[8] H. Sung, and I. Francis, Nanotechnology for Environmental Remediation,
Springer Science+Business Media, Inc, 2006.
[9] He Feng and Zhao Dongye, Preparation and Characterization of a New
Class of Starch-Stabilized Bimetallic Nanoparticles for Degradation of
Chlorinated Hydrocarbons in Water. Environmental Science &
Technology, 39, 2005, pp. 3314-3320.
[10] APHA, AWWA, WEF, Standard Methods for the Examination of Water
and Wastewater. (19th ed.), Washington DC, APHA, 1998.
[11] Kanel, Sushil Raj, Greneche, Jean-Mark and Choi, Heechul, Arsenic (V)
Removal from Groundwater Using Nano Scale Zero-Valent Iron as a
Colloidal Reactive Barrier Material, Environ. Sci. Technol, 40, 2006, pp.
2045-2050.
[12] M. Ponder Sherman, G. Darab John, E. Mallouk, Thomas, Remediation
of Cr(VI) and Pb(II) Aqueous Solutions Using Supported, Nanoscale
Zero-valent Iron. Environmental Science & Technology, 34, 2000, pp.
2564-2569.
[13] Xue Song Wang, Yu Jun Tang, Li Fang Chen, Fei Yan Li, Wen Ya Wan,
Ye Bin Tan, Removal of Cr(VI) by Zero-valent, Iron-encapsulated
Alginate Beads, 2009, pp. 263-267.
[14] C. K. Lai Keith and M. C. Lo Irene, Removal of Chromium (VI) by Acid-
Washed Zero-Valent Iron under Various Groundwater Geochemistry
Conditions. Environmental Science & Technology, 42, 2008. pp. 1238-
1244.
[15] M.J. Alowitz and M.M. Scherer, Kinetics of nitrate, nitrite, and Cr(VI)
reduction by iron metal. Environ. Sci. Technol. 36, 2002, pp. 299-306.
[16] D. Karabelli, C. Uzum, T. Shahwan, A. E. Eroglu, T. B. Scott, K. R.
Hallam, Batch Removal of Aqueous Cu2+ Ions Using Nanoparticles of
Zero-Valent Iron: A Study of the Capacity and Mechanism of Uptake.
Industrial & Engineering Chemistry Research, 47, 2008, pp. 4758-4764.
[17] K.K.H, Choy, G. McKay and JF Porter, Sorption of acid dyes from
effluents using activated carbon. Resour. Conserv. Recycl, 27, 1999, pp.
57-71.
@article{"International Journal of Earth, Energy and Environmental Sciences:60590", author = "A.R. Rahmani and M.T. Samadi and R. Noroozi", title = "Hexavalent Chromium Removal from Aqueous Solutions by Adsorption onto Synthetic Nano Size ZeroValent Iron (nZVI)", abstract = "The present work was conducted for the synthesis of
nano size zerovalent iron (nZVI) and hexavalent chromium (Cr(VI))
removal as a highly toxic pollutant by using this nanoparticles. Batch
experiments were performed to investigate the effects of Cr(VI),
nZVI concentration, pH of solution and contact time variation on
the removal efficiency of Cr(VI). nZVI was synthesized by
reduction of ferric chloride using sodium borohydrid. SEM and
XRD examinations applied for determination of particle size and
characterization of produced nanoparticles. The results showed that
the removal efficiency decreased with Cr(VI) concentration and pH
of solution and increased with adsorbent dosage and contact time.
The Langmuir and Freundlich isotherm models were used for the
adsorption equilibrium data and the Langmuir isotherm model was
well fitted. Nanoparticle ZVI presented an outstanding ability to
remove Cr(VI) due to high surface area, low particle size and high
inherent activity.", keywords = "Adsorption, aqueous solution, Chromium, nZVI,removal.", volume = "5", number = "2", pages = "101-4", }
