Removal of Arsenic (III) from Contaminated Waterby Synthetic Nano Size Zerovalent Iron

Authors: A. R. Rahmani, H. R. Ghaffari, M. T. Samadi

Abstract:

The present work was conducted for Arsenic (III) removal, which one of the most poisonous groundwater pollutants, by synthetic nano size zerovalent iron (nZVI). Batch experiments were performed to investigate the influence of As (III), nZVI concentration, pH of solution and contact time on the efficiency of As (III) removal. nZVI was synthesized by reduction of ferric chloride by sodium borohydrid. SEM and XRD were used to determine particle size and characterization of produced nanoparticles. Up to 99.9% removal efficiency for arsenic (III) was obtained by nZVI dosage of 1 g/L at time equal to 10 min. and pH=7. It could be concluded that the removal efficiency were enhanced with increasing of ZVI dosage and reaction time, but decreased with increasing of arsenic concentration and pH for nano sized ZVI. nZVI presented an outstanding ability to remove As (III) due to not only a high surface area and low particle size but also to high inherent activity.

Keywords: Arsenic removal, aqueous solution, zero valent iron.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1329400

References:

[1] S.R Kanel, B. Manning, L. Charlet and H. Choi, "Removal of Arsenic(III) from Groundwater by Nanoscale Zero-Valent Iron" Environ. Sci. Technol. 2005, 39, pp.1291-1298.
[2] S.R. Kanel, J.M. Greneche and H. Choi "Arsenic(V) Removal from Groundwater Using Nano Scale Zero-Valent Iron as a colloidal Reactive Barrier Material" Environ. Sci. Technol. 2006, 40, pp.2045-2050.
[3] T. Konstantina, P. Nikolaos, V. Nikolaos, K. Nikolaos and E. Pavlos, "Arsenic removal from geothermal water with zero-valent iron-Effect of temperature", phosphate and nitrate", Water Research Journal. 2006, 40(12), pp.2375-2386.
[4] T. Konstantina, P. Elpida and P.N. Nikolaos, "Modeling of arsenic immobilization by zero valent iron", European Journal of Soil Biology, 2007, 43, pp.356-367.
[5] B. Sunbaek, D. Mark and P. Georg, "Xiaoguang, M. Chemical reaction between arsenic and zero-valent iron", Water Research Journal, 2005, 39(5), pp.763-7700.
[6] L. Xiao-qin, D.W. Elliott and Z. Wei-xian, "Zero-Valent Iron Nanoparticles for Abatement of Environmental Pollutants: Materials and Engineering Aspects". Critical Reviews in Solid State and Materials Sciences, 2006, 31, pp.111-122.
[7] V. Plagentz, M. Ebert and A. Dahmke, "Remediation of groundwater chlorinated and brominated hydrocarbons, benzen and chromate by sequential treatment using ZVI and GAC" Environ Geol. 2006, 49: pp.684-695
[8] C. Shiao-Shing, C. Chih-Yu, L. Chi-Wang, C. Pao-Hsuan and C. Yu- Min, "Reduction of chromate from electroplating wastewater from pH 1 to 2 using fluidized zero valent iron process" journal of Hazardous Materials. 2007, 142, pp.362-367.
[9] 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, 2005, 6(10), pp.1022-1027.
[10] X. Yinhui and Z. Dongye, "Reductive immobilization of chromate in water and soil using stabilized iron nanoparticles" Water Research Journal, 2007, 41, pp.2101-2108.
[11] Abul B.M. Giasuddin, R.K. Sushil and C. Heechul, "Adsorption of Humic Acid onto Nanoscale Zero valent Iron and Its Effect on Arsenic Removal" Environ. Sci. Technol, 2007, 41, pp.2022-2027.
[12] C.C. Gordon and H.L. Yang, Lee, "Chemical reduction of nitrate by nanosized iron: kinetics and pathways" Water Research Journal, 2005, 39, pp.884-894.
[13] C. Shiao-Shing, H. Hong-Der and L. Chi-Wang, "A new method to produce nanoscale iron for nitrate removal" Journal of Nanoparticle Research, 2005. 6: pp.639-647.
[14] L. Xiao-qin, G.B. Derick and Z. Wei-xian, "Stabilization of biosolids with nanoscale zero-valent iron (nZVI)" Journal of nanoparticle research, 2007, 9, pp.233-243.
[15] R. Rangsivek and M.R. Jekel, "Removal of dissolved metals by zerovalent iron (ZVI): Kinetics, equilibrium, processes and implications for storm water runoff treatment" Water Research Journal, 2005, 39, pp.4153-4163.
[16] J. Sung Hee and I. Francis Cheng, "Nanotechnology for Environmental Remediation" Springer Science+Business Media, Inc, USA, 2006.
[17] APHA, AWWA, WEF, Standard Methods for the Examination of Water and Wastewater. 19th Ed.: APHA, Washington DC, 1998.
[18] H.Y. Shu, M.C. Chang, H.H. Yu and W.H. Chen, "Reduction of an azo dye Acid Black 24 solution using synthesized nanoscale zero valent iron particles", Journal of Colloid and Interface Science, 2007, 314, pp.89- 97.