Preparation of CTS/MFA Composite and its Adsorption Property of Direct Dyes

Abstract:

A novel CTS/MFA composite was prepared by a solution reaction between chitosan (CTS) and fly ash modified by acid (MFA), and used for the adsorption of direct green BE (DG BE) and direct claret BE (DC BE) dyes. Some important conditions about preparation and adsorption of the composite were discussed in detail. The adsorption property of CTS/MFA was investigated. The results show that the obtained CTS/MFA (1:20 of CTS/FA mass ratio) has excellent adsorption properties for DG BE and DC BE dyes with adsorption capacities of 886 and 688mg/g , which are nearly 8 times higher than those of FA, respectively. The adsorption of CTS/MFA is strongly pH-dependent and the adsorption equilibrium can be reached in 90 minutes at 298K. The whole adsorption processes of two dyes fully conform to the pseudo-second-order rate model at different temperatures. The adsorption behavior can be described by Langmuir model well. It was found by the characterization of SEM/EDS and XRD that CTS was successfully loaded onto the MFA. The surface morphology of CTS/MFA changed significantly compared with that of FA, and the surface became more rough and uneven. As a cheap and easy-to-obtain composite material, CTS/MFA has a giant application potential for effective treatment of direct dye wastewater.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 1432-1437
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.1432
• Online since: May 2020
• Authors: Ting Lv, Bei Gang Li*
• Keywords: Adsorption, Chitosan, Composite, Direct Dyes, Fly Ash

References

[1] D.P. Duan, The comprehensive utilization of fly ash,J. Resources Economization & Environmental Protection. 05(2019)71.

[2] J.P. Shi, H.Y. Zhang, D. Wang, et al, Research progress of fly ash as water treatment agent,J. Chemical Enterprise Management. 17(2019)199.

[3] J. Zhang, Advances in the comprehensive utilization of fly ash,J. Henan Chemical Industry. 02(2019)12-17.

[4] W. Ma, L.L. Zhang. Study on the treatment of fluorine-containing wastewater with modified calcium salt and fly ash combined with pac,J. Energy and Energy Saving. 05(2019)98-99.

[5] K. Ding Q.Q. Xu, W.R. Xia, et al, Application of oligosan in poultry production,J. Feed Industry. 10(2019)17-21.

[6] Pillai C.K.S, Paul W, Sharma Chandra P, Chitin and chitosan polymers: Chemistry, solubility and fiber formation,J. Progress in Polymer Science. 34(2009)641-678.

DOI: 10.1016/j.progpolymsci.2009.04.001

[7] L.X Gao, H.X. Wang, J.Y. Zhang, et al, Chitosan aerogel and its application in the field of environment,J. Guangdong Chemical Industry. 45(2018)90.

[8] W. Tang, Z.Y. Liu, Y. Li, et al, Preparation and hydrophobic modification of hybrid chitosan aerogels,J. Technology Innovation and Application. 15(2019)10-11.

[9] S. Wang, K.F. Zhang, X.G. Li, et al, Study on sand filtration efficiency of new aluminum sulfate chitosan filter aid,J. China Environmental Science. (2019)1-10.

[10] F. Zhang, T. Feng, J. Wang, et al, Study on the Adsorption of Direct Dyes by Crosslinked Chitosan Membrane,J. Industrial Safety and Environmental Protection. 38(2012)57-82.

[11] Z.Y. Ren, B.G. Li, Preparation and characterization of Y (III) / MFA composites and their adsorption to direct green BE, J. Chinese Rare Earths. 39(2018) 55-63.