Removal of Phosphate from Synthetic Aqueous Solution by Adsorption with Dolomite from Padalarang

Fadjari Lucia Nugroho; Lili Mulyatna; Anggi Doli Wiranata Situmeang

doi:10.5614/j.eng.technol.sci.2014.46.4.5

Authors

Fadjari Lucia Nugroho Department of Environmental Engineering, Pasundan University
Lili Mulyatna Department of Environmental Engineering, Pasundan University
Anggi Doli Wiranata Situmeang Department of Environmental Engineering, Pasundan University

DOI:

https://doi.org/10.5614/j.eng.technol.sci.2014.46.4.5

Abstract

The presence of phosphate in wastewaters can cause eutrophication of surface water bodies leading to algal-blooming in the aquatic environment and degradation of water quality. Phosphate removal from wastewaters by conventional biological treatment removes only 10-30% of the phosphate, whilst chemical treatment using precipitants such as calcium or iron salts, although effective, is expensive and produces water-rich sludge which must be further treated. Hence, phosphate removal by adsorption in the form of Ca -phosphate has been proposed as an alternative to the more traditional methods. This study investigated the feasibility of using dolomite"?a common sedimentary rock"?from Padalarang, West Java, Indonesia as the adsorbent for the removal of phosphate from synthetic aqueous solution. Chemical analysis revealed that the Padalarang dolomite contains 33.6-36.2% CaO. Batch experiments at room temperature indicated that optimum removal of phosphate was achieved at pH 9. At 25C , where increasing concentrations of phosphate (10"?100 mg/L) increased phosphate adsorption (2.15-31.3 mg/g) by the dolomite. The adsorption of phosphate could be described by the Langmuir isotherm model, with constants Qm= 476.19 mg/g, K L= 0,00106 L/mg and equilibrium parameter (R L): 0.904 "? 0.989. Phosphate adsorption by dolomite not only permits its removal but also its potential recovery for reuse.

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References

Akay, G., Keskinler, B., Cakici, A. & Danis, U., Phosphate Removal from Water by Red Mud Using Crossflow Microfiltration, Water Res., 32, pp. 717-726, 1998.

Can, M.Y. & Yildiz, E., Phosphate Removal from Water by Flyash: Factorial Experimental Design, J. Hazard. Mater., B135, pp. 165-170, 2006.

Zhang, J., Shen, Z., Shan, W., Mei, Z. & Wang, W., Adsorption Behavior of Phosphate on Lanthanum(III)-Coordinated Diamino-Functionalized 3D Hybrid Mesoporous Silicates Material, J. Hazard. Mater., 186, pp. 76-83, 2011.

Chen, X., Kong, H., Wu, D., Wang, X. & Lin, Y., Phosphate Removal and Recovery through Crystallization of Hydroxyapatite Using Xonotlite as Seed Crystal, J. Environ. Sci., 21, pp. 575-580, 2009.

Song, Y., Weidler, P.G., Berg, U, N1/4esch, R. & Donnert, D., CalciteSeeded Crustallization of Calcium Phosphate for Phosphorus Recovery, Chemosphere, 63, pp. 236-243, 2006.

Karaca, S., G1/4rses, A., Ejder, M. & Aikyildiz., Kinetic Modeling of Liquid-Phase Adsorption of Phosphate on Dolomite, J. Colloid Interface Sci., 277, pp. 257-263, 2004.

Walker, G.M., Hansen, L., Hanna, J.A. & Allen, S.J, Kinetics of a Reactive Dye Adsorption onto Dolomitic Sorbents, Water Res., 37, pp. 2081-2089, 2003.

Karaca, S., G1/4rses, A., Ejder, M. & Aikyildiz., Adsorptive Removal of Phosphate from Aqueous Solutions Using Raw and Calcinated Dolomite, J. Hazard. Mater., B128, pp. 273-279, 2006.

Hanna, A.A., Sherief, M.A. & Abo elenin, R.M.M., Phosphate Removal from Wastewater by Calcite and Dolomite Ores, Phosphorus Res. Bull., 22, pp. 7-12, 2008.

Roques, H., Nugroho-Jeudy, L. & Lebugle, A., Phosphorus Removal from Wastewater by Half-Burned Dolomite, Water Res., 25 (8), pp. 959-965, 1991.

Freundlich, H., Adsorption in Solution, Phys. Chemie, 57, pp. 384-410, 1906.

Malik, P.K., Dye Removal from Wastewater Using Activated Carbon Developed from Sawdust: Adsorption Equilibrium and Kinetics, J. Hazard. Mater., B113, pp. 81-88, 2004.

Langmuir, I., Adsorption of Gases on Plane Surfaces of Glass, Mica and Platinum., J. Am. Chem. Soc., 40, pp. 1361-1403, 1918.

Hall, K.R., Eagleton, L.C., Acrivos, A. & Vermeulen, T., Pore and Solid Diffusion Kinetics in Fixed Bed Adsorption Under Constant Pattern Conditions., ind. Eng. Chem. Fundamentals, 5(2), pp. 212-223, 1966.

Chen, J., Cai, Y., Clark, M. & Yu, Y., Equilibrium and Kinetic Studies of Phosphate Removal from Solution onto A Hydrothermally Modified Oyster Shell Material, PLOS One, 8(4), pp. 1-10, 2013.

House, W.A., The Physico-Chemical Conditions for The Precipitation of Phosphate with Calcium, Environ. Technol., 20, pp. 727-733, 1999.