Preparation of Two Magnetites and Application for the Removal of Fluoride from Waters

Abstract:

Two magnetites (M-20 and M-80) were successfully prepared by two different methods. The XRD patterns showed that M-20 was a poorly crystalline magnetite and M-80 possessed a relatively well crystallinity. For M-20 and M-80, the specific surface area (SSA) was 48.53 and 26.72 m²/g; at pH 5.0 the zeta potential was 28.34 and 23.51 mV; and the isoelectric point (IEP) was 6.8 and 7.0, respectively. At pH 5.0, the Langmuir adsorption capacity for fluoride of M-20 and M-80 was 12.45 and 9.89 mg/g, respectively. This indicates that M-20 is a higher efficient adsorbent for fluoride removal from waters compared to M-80. Langmuir model was suitable to fit the fluoride adsorption data of M-20 and M-80 (R² =0.988 and 0.982, respectively) and Freundlich model can not well fit the fluoride adsorption data of the two magnetites (R² =0.937 and 0.951, respectively).

• Periodical: Advanced Materials Research (Volumes 884-885)
• Pages: 121-124
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.884-885.121
• Online since: January 2014
• Authors: Qin Yang, Jing Wang, Li Ying Zhou, Hong Xia Zeng, Shi Yong Wei
• Keywords: Adsorption, Fluoride, Magnetite, Preparation, Surface Properties

References

[1] S. Das, B.C. Mehta, S.K. Samanta, P.K. Das and S.K. Srivastava: Indian J. Environ. Health Vol. 1(2000), p.40–46.

[2] X. Fan, D.J. Parker and M.D. Smith: Water Res. Vol. 37(2003), p.4929–4935.

[3] M. Young, T. Hashimoto, N. Hosho and H. Myoga: Water Res. Vol. 33(1999), p.3395–3402.

[4] World Health Organization (WHO) Guidelines for Drinking Water Quality, World Health Organization, Geneva, (1993).

[5] G. Jacks, P. Bhattacharya, V. Chaudhary and K.P. Singh: Appl. Geochem. Vol. 20(2005), p.221–228.

[6] L. Zhu, H.H. Zhang, B. Xia and D.R. Xu: Environ. Int. Vol. 33(2007), p.302–308.

[7] S.Y. Wei and W.J. Xiang: J. Food Agric. Environ. Vol. 10(2012), p.902–906.

[8] A. Eskandarpour, M.S. Onyango, A. Ochieng and S. Asai: J. Hazar. Mater. Vol. 152(2008), p.571–579.

[9] J.F. Liu, Z.S. Zhao and G.B. Jiang: Environ. Sci. Technol. Vol. 42(2008), p.6949–6954.

[10] U. Schwertmann and R.M. Cornell: Iron oxides in the laboratory-preparation and characterization, second ed. Wiley-VCH Weinheim, (2000).

[11] H.V. Tran, L.D. Tran and T.N. Nguyen: Mater. Sci. Eng. C Vol. 30(2010), pp.304-310.

[12] Y.C. Chang and D.H. Chen: J. Colloid Interf. Sci. Vol. 283(2005), p.446–451.

[13] E. Ills and E. Tombacz: Colloids Surf. A Vol. 230(2003), p.99–109.

[14] I. Langmuir: J. Am. Chem. Soc. Vol. 40(1916), p.1361–1368.

[15] H. M. F. Freundlich: J. Phys. Chem. B Vol. 57(1906), p.385–470.

[16] D. Nguyen-Thanh, K. Block and T.J. Bandosz: Chemosphere Vol. 59(2005), p.343–353.

[17] J. Zhuang and G.R. Yu: Chemosphere Vol. 49(2002), p.619–628.