Refine your search
Collections
Co-Authors
Year
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Zhu, Kaiyang
- Adsorptive Removal of Methylene Blue by Mn-Modified Tourmaline
Abstract Views :158 |
PDF Views:0
Authors
Affiliations
1 Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, CN
1 Department of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, CN
Source
Nature Environment and Pollution Technology, Vol 17, No 1 (2018), Pagination: 243-247Abstract
Adsorbent Mn-modified tourmaline was creatively prepared by wet impregnation in a MnSO4 solution and subsequent calcination procedure. The prepared Mn-modified tourmaline was used for the adsorptive removal of a cationic dye methylene blue (MB). The experimental data under different solution pH conditions were simulated using both linear and non-linear kinetic models. Linear pseudo-secondorder model and non-linear Elovich kinetic model were found to be more suitable to describe the adsorption kinetics. This indicates that the adsorption of MB onto the Mn-modified tourmaline is possibly a chemisorption process in which the rate-determining step is diffusion in nature. The adsorption isotherms were also investigated and the experimental data were fitted by both Langmuir and Freundlich models. Usinxg Langmuir model, the calculated maximal adsorption capacities for MB achieved 158.5 mg/g at 298 K. Thermodynamic analysis indicates that the changes of enthalpy and entropy of the adsorption processes are 55.6 KJ mol-1 and 199.0 J mol-1 k-1, respectively. The negative value of Gibbs free energy change and the positive value of enthalpy also indicates that the adsorption process is spontaneous and endothermic.Keywords
Mn-Modified Tourmaline, Methylene Blue, Adsorption Kinetics, Isotherm.Full Text
References
- Aharoni, C., Sparks, D.L. and Levinson, S. 1991. Kinetics of soil chemical reactions: Relationships between empirical equations and diffusion models. Soil. Sci. Soc. Am. J., 55: 1307-1312.
- Freundlich, H.M.F. 1906. Uber die adsorption in Lasungen. J. Phys. Chem., 57: 385-470.
- Fuat, Y. 1997. Tourmaline: software package for tourmaline, tourmalinerich rocks and related ore deposits. Comput. Geosci., 23: 47-59.
- Ho, Y.S., and McKay, G. 1999. Pseudo-second-order model for sorption process. Process Biochem., 34(5): 451-65.
- Kithome, M., Paul, J.W., Lavkulich, L.M. and Bomke, A.A. 1988. Kinetics of ammonium adsorption and desorption by the natural zeolite clinoptilolite. Soil Sci. Soc. Am. J., 62: 622-629.
- Lagergren, S. 1898. Zur theorie der sogenannten adsorption gelöster stoffe. Kungliga Svenska Vetenskapsakademiens. Handlinga, 24(4): 1-39.
- Langmuir, I. 1916. Kinetic model for the sorption of dye aqueous solution by clay-wood sawdust mixture. J. Am. Chem. Soc., 38: 2221-2295.
- Li, G.T., Chen, D., Zhao, W.G. and Zhang, X.W. 2015. Efficient adsorption behavior of phosphate on La-modified tourmaline. J. Environ. Chemi. Eng., 3(1): 515-522.
- Lyubchik, S.I., Lyubchik, A.I., Galushko, O.L., Tikhonova, L.P., Vital, J., Fonseca, I.M. and Lyubchik, S.B. 2004. Kinetics and thermodynamics of the Cr(III) adsorption on the activated carbon from co-mingled wastes. Colloid Surf. A-Physicochem. Eng. Asp., 242: 151-58.
- Pavlatou, A. and Polyzopouls, N.A. 1988. The role of diffusion in the kinetics of phosphate desorption: the relevance of the Elovich equation. J. Soil. Sci., 39(3): 425-436.
- Qu, J.H. 2008. Research progress of novel adsorption processes in water purification. J. Environ. Sci., 20: 1-13.
- Ruan, D., Zhang, L.N., Zhang, Z.J. and Xia, X.M. 2004. Structure and properties of regenerated cellulose/tourmaline nanocrystal composite films. J. Polym. Sci. B Polym. Phys., 42(3): 367-373.
- Wang, C.P., Wu, J. Z., Sun, H. W., Wang, T., Liu, H.B. and Chang, Y. 2011. Adsorption of Pb(II) ion from aqueous solutions by tourmaline as a novel adsorbent. Ind. Eng. Chem. Res., 50(14): 8515-8523.
- Yu, L., Wang, C.P., Chen, F.Y., Zhang, J.Q., Ruan, Y.F. and Xu, J.Y. 2016. Investigating the synergistic effects in tourmaline/TiO2based heterogeneous photocatalysis: Underlying mechanism insights. J. Mol. Catal. A: Chem., 411: 1-8.