NGHIÊN CỨU TỔNG HỢP VÀ KHẢO SÁT CÁC YẾU TỐ ẢNH HƯỞNG TỚI KHẢ NĂNG HẤP PHỤ PHOSPHAT CỦA VẬT LIỆU HYDROXIT LỚP KÉP Zn-Al
Nội dung chính của bài viết
Tóm tắt
STUDY ON SYNTHESIS AND DETERMINATION OF FACTORS AFFECTING PHOSPHATE ADSORPTION ON Zn-Al LAYERED DOUBLE HYDROXIDE MATERIAL
In this paper, a layered double hydroxide (LDH) materials with a Zn/Al molar ratio of 2:1 were synthesized successfully by co-precipitation method. Materials were chacracterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy/energy dispersive X-ray spectroscopy (FESEM/EDX). The effects of different calcined temperatures, initial phosphate concentrations, contact time, pH values and co-existing on phosphate adsorption were investigated from batch tests. Our results indicate that adsorption capacity of Zn-Al LDH is the best at calcinned temperature of 200oC, the equilibrium time attained within 240 min and the optimal pH was approximately 4. The effect of common coexisting ions including chloride, carbonate, nitrate and sulphate on the simultaneous adsorption of phosphate was in the order of Cl‒ < NO3‒ < SO42‒ < CO32‒.
Từ khóa
Phosphate, Zn-Al layered double hydroxide, adsorption, droxit lớp kép Zn-Al, hấp phụ
Chi tiết bài viết
Tài liệu tham khảo
2. Jiabin Zhou, Siliang Yang, Jiaguo Yu. Zhan Shu, Novel hollow microspheres of hierarchical zinc-aluminum layered double hydroxides and their enhanced adsorption capacity for phosphate in water, Journal of Hazardous Materials, 2011, 192:1114-1121.
3. Sidra Iftekhar, Mehmet Emin Küçük, Varsha Srivastava, Eveliina Repo, Mika Sillanpää, Application of zinc-aluminium layered double hydroxides for adsorptive removal of phosphate and sulfate: equilibrium, kinetic and thermodynamic, Chemosphere, 2018, 209:470-479.
4. Xiang Cheng, Xinrui Huang, Xingzu Wang, Bingqing Zhao, Aiyan Chen, Dezhi Sun, Phosphate adsorption from sewage sludge filtrate using zinc-aluminum layered double hydroxides, Journal of Hazardous Materials, 2009, 169:958-964.
5. L. Lundehøj, H. C. Jensen, L. Wybrandt, U. G. Nielsen, M. L. Christensen, Layered double hydroxides for phosphorus recovery from acidifiedand non-acidified dewatered sludge, Water Research, 2019, 153:208-216.
6. Zeng L.; Li X., Liu J., Adsoptive removl of phosphate from aqueous solutions using iron oxide tailings, Water Res., 2004, 38:1318-1326.
7. Hanna Siwek, Artur Bartkowiak and Małgorzata Włodarczyk, Adsorption of Phosphates from aqueous solutions on alginate/Goethite hydrogel composite, Water, MDPI, 27 March 2019.
8. Han J. S., Hur N., Choi B., Min, S. H., Removal of phosphorus using chemically modified lignocellulosic materials, In proceedings of the 6th inter regional conference on environment-ưater, “Land and water use planning and management”, Albacete, Spain, 3-5 September 2003; pp. 1-11.
9. Eberhardt L. T., Min S. H., Biosorbents prepared from wood particles treated with anionic polymer and iron salt: Effect of particle size on phosphate adsorption, Bioresour. Technol., 2008, 99:626-630.
10. Eberhardt L. T., Min S. H., Han J. S., Phosphate removal by refined aspen wood fiber treated with carboxymethyl cellulose and ferrus chloride, Bioresour. Technol., 2006, 97:2371-2376.
11. Zhang G., Liu H., Liu R., Qu J., Removal of phosphate from water by Fe_Mn binary oxide adsorbent, J. Colloid Interface Sci., 2009, 335:168-174.