The Comparison of Surface Modification Methods of the Heavy Metals Adsorption of Activated Carbon from Rice Husk

Abstract:

Surface modification of activated carbon (AC) could be done through different methods in order to modify their specific physical and chemical properties to facilitate metals removal from wastewater. Three methods were used to modify the rice husk AC (RHAC) including the use of (1) HNO₃, (2) dithizone and (3) the combination of HNO₃ with dithizone. These modification agents were increased its affinity towards the desired pollutant. The modification methods demonstrated the effective process for the metal ions adsorption capability and the removal of them from water. For Ni²⁺ and Cd²⁺ adsorption, RHAC was modified by HNO₃ giving the best adsorption capacity in comparison with using dithizone or the combination of HNO₃ with dithizone. That adsorption was reached 17.23 mg/g for Ni²⁺ and 29.61 mg/g for Cd²⁺. Additionally, the surface area, which was characterized by BET (Brunauer–Emmett–Teller) of RHAC, was 710.8 m²/g and DA micropore volume was 0.447 (cm³/g). Especially, the only modified RHACs had the peak of N-H functional group by using Fourier transform infrared spectrum (FTIR). Besides, the only RHAC modification by HNO₃ had peak of C=O. That significantly contributed to increase the metal ions adsorption capacity of RHAC.

• Periodical: Applied Mechanics and Materials (Volume 876)
• Pages: 91-96
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.876.91
• Online since: February 2018
• Authors: Hoa Thai Ma, Van Thi Thanh Ho, Nguyen Bao Pham, Long Giang Bach, Dinh Tuan Phan*
• Keywords: Activated Carbon, Cd²⁺, Ni²⁺, Rice Husk, Surface Modification

References

[1] A. Dabrowski, P. Podkoscielny, Z. Hubicki, M. Barczak. Adsorption of Phenolic Compounds by Activated Carbon, A Critical Rev. Chemosp. 58 (2005) 1049-1070.

DOI: 10.1016/j.chemosphere.2004.09.067

[2] W. M. A. W. Daud, W. S. W. Ali, M. Z. Sulaiman. The effects of carbonization temperature on pore development in palm-shell-based activated carbon. Carbon. 38 (2000) 1925–(1932).

DOI: 10.1016/s0008-6223(00)00028-2

[3] S. Yao, et al. Removal of Pb(II) from water by the activated carbon modified by nitric acid under microwave heating. J. Colloid Interf. Sci. 463 (2015) 118-127.

DOI: 10.1016/j.jcis.2015.10.047

[4] G. Jin, Y. Eom, T. G. Lee. Removal of Hg(II) from Aquatic Environments using Activated Carbon Impregnated with Humic Acid. J. Ind. Eng. Chem. 42 (2016) 46-52.

DOI: 10.1016/j.jiec.2016.07.029

[5] J. W. Shim, S. J. Park, S. K. Ryu. Effect of modification with HNO and NaOH on metal adsorption by pitch-based activated carbon fibers. Carbon. 39 (2001) 1635–1642.

DOI: 10.1016/s0008-6223(00)00290-6

[6] I. Lopez Garcia, P. Navarro and M. Hernandez Cordoba. Manual and fia methods for the determination of cadmium with malachite green and iodide. Talanta. 35 (1998) 885-889.

DOI: 10.1016/0039-9140(88)80207-8

[7] V. Bento, C. L. Donnici, R. M. Lago. Tailoring Activated Carbon by Surface Chemical Modification with O, S, and N Containing Molecules. Mater. Res. 6 (2003) 129-135.

DOI: 10.1590/s1516-14392003000200004

[8] J. Zhang, et al. Study On The Preparation Of Activated Carbon For Direct Carbon Fuel Cell With Oak Sawdust. Wiley Online Library. 90 (2012) 762-768.

DOI: 10.1002/cjce.20549

[9] Y. C. Sharma and Uma, Optimization of Parameters for Adsorption of MB on a Low-cost Activated Carbon, J. Chem. Eng. Data, 55 (2010) 435-439.

DOI: 10.1021/je900408s

[10] S. Han, D. Shin, H. Choi, S. Lee, Molecular determinants of the interaction between Doa1 and Hse1 involved in endosomal sorting, Biochem. Biophys. Res. Commun. 446 (2014) 352-357.

DOI: 10.1016/j.bbrc.2014.02.118