10744

Ability of different adsorbent for removal of Rhodamine B from aqueous solution

Nawzad Noori Ahmed1, Kareem Jumaah AL-Salihi1               
1 University of Sulaimani/ College of Science /Department of Chemistry

Original: 21 December 2018
Revised: 30 January 2019
Accepted: 17 February 2019
Published online: 20 June 2019   



Abstract

Adsorption of Rhodamine B dye on powdered TiO2, zinc oxide (ZnO) and natural Bentonoit clay from aqueous solutions have been studied .The potential for the adsorption of Rhoamine dye at a fixed initial concentration of 5 ppm. The experiments were carried out in a batch system to optimize operation variables initial concentration, effect of time adsorption isotherms.

The langmuir and frendlish isotherm equations were applied to the data and values of parameters of these results suggest that the adsorption of (RB) dye on ZnO observed more fit to Freundlich model it means the Rhodamine B adsorbed weakly to the surfaces of ZnO, physical adsorption is achieved between the adsorbed and adsorbent, but the adsorption on TiO2 and bentonite better fit to Langmuir model. Kinetics study was made using lagergreen equation the results show the sorption of Rhodamine B dye uptake on ZnO fitted to first order reaction. And the sorption of RB on TiO2, and Bentonite fitted with second order. The partition coefficient kd for the sorption of RB on TiO2, ZnO and bentonite also determined and shows the value of Kd increases with time until equilibrium and becomes constant. we can conclude that the proportion of RB dye on each adsorbent increase which means that the large number of adsorption sites available with the rate slowing with time as sites fill up. The enthalpy of adsorption of rhodamine B on TiO2, + 4.09 kJ/mol, on ZnO +15.25 kJ/mol and on bentonite +4.01 kJ/mol indicates that the process is endothermic. The thermodynamic quantities ΔG°, ΔH°, and ΔS°, for the adsorption of rhodamine B dye on the surfaces of TiO2, ZnO and bentonite have been calculated. The result shows that the value of ΔG° decrease with an increase in temperature indicates that the adsorption process is more favorable at high temperature. Whereas the positive value of ΔS° as a result of rhodamine B adsorption due to an increased degree of freedom in the system and indicates high affinity of the adsorbent for Rhodamine molecules.

Key Words: adsorption, adsorbent,TiO2, ZnO, bentonite isotherm, partition coefficient, kinetic of heterogeneous reaction     

    References

[1] Schwarzenbach R. P., Escher B. I., Fenner K., Hofstetter T. B., Johnson C. A., Gunten U. V., and Wehrli B.,"The challenge of micropollutants in aquatic systems", Science, Vol. 313, pp. 1072–1077. (2006).

[2] Harikishore D., Kumar R., and  Lee S. M.." Water Pollution and Treatment Technologies", Journal of Environmental and Analytical Toxicology, Vol.2, pp. 1-4, (2012).

[3] Mark A. S., Paul W. B., Menachem E, John G. G. ,Benito J. M., and Anne M. M., " Science and technology for water purification in the coming decades". Nature. Vol. 452, pp. 301-310. (2008).

 [4] Mohamed A. H. , El Nemr A.,  "Health and Environmental Impacts of Dyes: Mini Review", American Journal of Environmental Science and Engineering. Vol. 1, No. 3, pp. 64-67. (2017).

[5] Brown D.  "Effects of colorants in the aquatic environment", Ecotoxicology and Environmental Safety. Vol.13, pp. 139-147. (1987).

[6] Gunatilake S.K. "Methods of Removing Heavy Metals from Industrial Wastewater", Journal of Multidisciplinary Engineering Science Studies, Vol.1, (2015), 1-7

[7] Boller, M. "Small wastewater treatment plants - A challenge to wastewater engineers", Water Science and Technology. Vol. 35, pp. 1-12. (1997).

[8] Zhao, Y., Gao, B. Y., Zhang, G. Z. "Coagulation and Sludge Recovery Using Titanium Tetrachloride as Coagulant for Real Water Treatment: A Comparison Against Traditional Aluminum and Iron Salts", Environmental Technology. Vol. 130, pp. 19–27. (2014).

[9] Antonopoulou, M., Evgenidou, E., Lambropoulou, D., Konstantinou, I. "A Review on Advanced    Oxidation Processes for the Removal of Taste and Odor Compounds from Aqueous Media", Water Resources. Vol. 53, pp. 215–234. (2014).

[10] Ganzenko, O., Huguenot, D., Van Hullebusch, E. D., Esposito, G., Oturan, M. A. "Electrochemical       Advanced Oxidation and Biological Processes for Wastewater Treatment: A Review of the Combined    Approaches", Environmental Science and Pollution Research. Vol.21, pp. 8493–8524. (2014).

[11] Kim, M.S., Kwak, D.H. "Comparative evaluation of particle separation efficiency based on carbon dioxide and air bubble sizes in flotation separation processes", Separation and Purification Technology. Vol. 138, pp. 161–168. (2014).

[12] Gruyter DE. "Adsorption Technology in Water Treatment", Walter de Gruyter GmbH & Co. KG, Berlin/Boston. Chapter one. pp. 5. (2012).

[13] Cheng-Hsiu Y., Chih-Hung H., Chung-Sung T. "A Review of CO2 Capture by Absorption and Adsorption", Aerosol and Air Quality Research. Vol.12, pp. 745–769. (2012).

[14] McMullan G, Meehan C, Conneely A, Kirby N, Robinson T, Nigam P, Banat IM, Marchant R, Smyth WF. "Mini-review: microbial decolorization and degradation of textile dyes", Applied Microbiology and Biotechnology. Vol. 56, No. 1-2, pp. 81-87. (2001).

 [15] Telmo J. V. P., Alexander F., Sandrina P. B., Jose´ M. G. M., and Mario N. B. S. " Accurate Determination of the Limiting Anisotropy of Rhodamine 101. Implications for Its Use as a Fluorescence Polarization Standard", Journal of Physical Chemistry  A. Vol. 112, pp. 5034–5039. (2008).

[16] Mariana B., Carlos A. M. A. and Jose M. G. M. "Synthesis and applications of Rhodamine derivatives    as fluorescent probes", Chemical Society reviews. Vol. 38, pp. 2410-2433. (2009).

[17] Tang Q., Xiao W., Li J., Chen D., Zhang Y, Shao J. and Dong X. "A fullerene -rhodamine B photosensitizer with pH activated visible light absorbance/fluorescence/photodynamic therapy", Journal of Material Chemistry B. Vol. 6, pp. 2778. (2018).

[18] Dayu W., Wei H., Zhihua L. Chunying D. Cheng H. and Dehui W. "Highly sensitive Multi responsive chemo sensor for selective detection of Hg2+ in natural water and different monitoring environments", Inorganic Chemistry. Vol.47, No. 16, pp 7190–7201. (2008).

[19] Crini, G. "Non-conventional low-cost adsorbents for dye removal: a review", Bioresource technology. Vol. 97, No. 9, pp. 1061-1085. (2006).

[20]  Shrotri  S., Harris  C. C., Huang  L. and  Somasundaran P. "A graphical technique for calculating adsorption/desorption isotherms for different solid/liquid ratios", Colloids and Surfaces A: Physicochemical and Engineering Aspects. Vol. 141, pp. 189-192. (1998).

[21]McKay Ho Y.S., and Mckay G. "Pseudo-second order model for sorption processes", Process Biochemistry. Vol. 34, pp. 451–465. (1999).

[22]  Graufer Z., Malter A. B, Yariv S., and Avnir D. " Sorption of Rhodamine B by Montmorillonite and      laponite", Colloids and Surfaces. Vol. 25, pp. 41-65. (1987).

[23]Damiyine B., Guenbour A. and Roussen R. "Rhodamine B Adsorption on natural and modified Moroccan clay with cetyltrimethylammonium bromide: kinetics, equilibrium and thermodynamics", Journal of Materials and Environmental Sciences. Vol. 8, pp. 868-871. (2017).

[24] Gopinathan, R., Bhowal, A., Garlapati, C., "Thermodynamic study of some basic dyes adsorption from aqueous solutions on activated carbon and new correlations ", Journal of Chemical Thermodynamic. Vol.107, pp. 182–188. (2017).

 [25]Hong, S., Wen, C., He, J., Gan, F., Ho, Y.S. "Adsorption thermodynamics of methylene blue onto bentonite", Journal of Hazardous Material. Vol. 167, pp. 630–633. (2009).