Nitrate removal from aqueous solution: Screening of variables and optimization

Document Type : Research Paper

Authors

1 Department of Chemical Engineering, Hakim Sabzevari University, Sabzevar, Iran

2 Faculty of Engineering, Islamic Azad University Shahrood Branch, Shahrood, Iran

Abstract

The adverse effects caused by the increase in nitrate concentration in drinking water have prompted researchers to find green and economical methods for nitrate removal. Mineral materials are suggested for this purpose due to their economic and environmental benefits. In this study, Iranian natural zeolite was used for this purpose. An organic surfactant, HDTMA-Br, was used to modify the natural zeolite. Fourier-transform infrared spectroscopy (FTIR) verified that the surfactant was loaded on the zeolite surface. The influence of various parameters on adsorption was studied using the Taguchi method. They were screened by Taguchi’s L8 array, and four significant variables were determined: mass of adsorbent, particle size, contact time, and competing anion concentration. The Taguchi L9 array was used to determine the optimum condition of these significant variables. Analysis of the results showed that the concentration of the competing anion was the most significant variable on the nitrate adsorption by the surfactant modified zeolite (SMZ). In the optimum conditions, SMZ removed about 90% of nitrate from the aqueous solution obtained at a 20 mg/L initial nitrate concentration, 10 min contact time, 15 g adsorbent, and without any competing anion. The study of the adsorption isotherms showed that the nitrate adsorption process by SMZ from the aqueous solution fits well with the Freundlich and linear models.

Graphical Abstract

Nitrate removal from aqueous solution: Screening of variables and optimization

Keywords

Main Subjects


[1] Li, J., Li, Y., Meng, Q. (2010). Removal of nitrate by zero-valent iron and pillared bentonite. Journal of hazardous materials, 174(1-3), 188-193.
[2] Islam, M., Patel, R. (2010). Synthesis and physicochemical characterization of Zn/Al chloride layered double hydroxide and evaluation of its nitrate removal efficiency. Desalination, 256(1-3), 120-128.
[3] Park, J. B. K., Craggs, R. J., Sukias, J. P. S. (2009). Removal of nitrate and phosphorus from hydroponic wastewater using a hybrid denitrification filter (HDF). Bioresource technology, 100(13), 3175-3179.
[4] Pang, Y., Wang, J. (2021). Various electron donors for biological nitrate removal: A review. Science of the total environment, 794, 148699.
[5] Altman, S. J., Parizek, R. R. (1995). Dilution of nonpointsource nitrate in groundwater (Vol. 24, No. 4, pp. 707-718). American society of agronomy, crop science society of America, and soil science society of America.
[6] Fanning, J. C. (2000). The chemical reduction of nitrate in aqueous solution. Coordination chemistry reviews, 199(1), 159-179.
[7] Cliford, D., Liu, X. (1993). Ion exchange for nitrate removal. JournalAmerican water works association, 85(4), 135-143.
[8] Schoeman, J. J., Steyn, A. (2003). Nitrate removal with reverse osmosis in a rural area in South Africa. Desalination, 155(1), 15-26.
[9] Sahli, M. M., Annouar, S., Mountadar, M., Soufiane, A., Elmidaoui, A. (2008). Nitrate removal of brackish underground water by chemical adsorption and by electrodialysis. Desalination, 227(1-3), 327-333.
[10] Kulkarni, S., Kaware, J. (2014). Regeneration and recovery in adsorption-a review. International journal of innovative science engineering and technology 1(8), 61-64.
[11] Reeve, P. J., Fallowfield, H. J. (2018). Natural and surfactant modified zeolites: A review of their applications for water remediation with a focus on surfactant desorption and toxicity towards microorganisms. Journal of environmental management, 205, 253-261.
[12] Mokhtari-Hosseini, Z. B., Kazemiyan, E., Tayebee, R., Shenavaei-Zare, T. (2016). Optimization of ammonia removal by natural zeolite from aqueous solution using response surface methodology. Hemijska industrija, 70(1), 21-29.
[13] Guan, H., Bestland, E., Zhu, C., Zhu, H., Albertsdottir, D., Hutson, J., Ellis, A. V. (2010). Variation in performance of surfactant loading and resulting nitrate removal among four selected natural zeolites. Journal of hazardous materials, 183(1-3), 616-621.
[14] Schick, J., Caullet, P., Paillaud, J. L., Patarin, J., Mangold-Callarec, C. (2010). Batch-wise nitrate removal from water on a surfactant-modified zeolite. Microporous and mesoporous materials, 132(3), 395-400.
[15] Gönder, Z. B., Kaya, Y., Vergili, I., Barlas, H. (2010). Optimization of filtration conditions for CIP wastewater treatment by nanofiltration process using Taguchi approach. Separation and purification technology, 70(3), 265-273.
[16] Srivastava, V. C., Mall, I. D., Mishra, I. M. (2008). Optimization of parameters for adsorption of metal ions onto rice husk ash using Taguchi's experimental design methodology. Chemical engineering journal, 140(1-3), 136-144.
[17] Hu, X., Cheng, Z. (2015). Removal of diclofenac from aqueous solution with multi-walled carbon nanotubes modified by nitric acid. Chinese journal of chemical engineering, 23(9), 1551-1556.
[18] Schick, J., Caullet, P., Paillaud, J. L., Patarin, J., Mangold-Callarec, C. (2011). Nitrate sorption from water on a Surfactant-Modified Zeolite. Fixed-bed column experiments. Microporous and mesoporous materials, 142(2-3), 549-556.
[19] Zhan, Y., Lin, J., Zhu, Z. (2011). Removal of nitrate from aqueous solution using cetylpyridinium bromide (CPB) modified zeolite as adsorbent. Journal of hazardous materials,186(2-3), 1972-1978.
[20] Hailu, S. L., Nair, B. U., Redi-Abshiro, M., Diaz, I., & Tessema, M. (2017). Preparation and characterization of cationic surfactant modified zeolite adsorbent material for adsorption of organic and inorganic industrial pollutants. Journal of environmental chemical engineering, 5(4), 3319-3329.
[21] Hrenovic, J., Rozic, M., Sekovanic, L., Anic-Vucinic, A. (2008). Interaction of surfactant-modified zeolites and phosphate accumulating bacteria. Journal of hazardous materials, 156(1-3), 576-582.
[22] Li, Z., Bowman, R. S. (2001). Regeneration of surfactant-modified zeolite after saturation with chromate and perchloroethylene. Water research, 35(1), 322-326.
[23] Guan, H., Schulze‐Makuch, D., Schaffer, S., Pillai, S. D. (2003). The effect of critical pH on virus fate and transport in saturated porous medium. Groundwater, 41(5), 701-708.
[24] Misaelides, P. (2011). Application of natural zeolites in environmental remediation: A short review. Microporous and mesoporous materials, 144(1-3), 15-18.
[25] Srivastava, V. C., Mall, I. D., Mishra, I. M. (2007). Multicomponent adsorption study of metal ions onto bagasse fly ash using Taguchi's design of experimental methodology. Industrial and engineering chemistry research, 46(17), 5697-5706.
[26] Küçük, Ö. (2006). Application of Taguchi method in the optimization of dissolution of ulexite in NH4Cl solutions. Korean journal of chemical engineering, 23, 21-27.
[27] Yeşilyurt, M. (2004). Determination of the optimum conditions for the boric acid extraction from colemanite ore in HNO3 solutions. Chemical engineering and processing: Process intensification, 43(10), 1189-1194.
[28] Chou, C. S., Yang, R. Y., Chen, J. H., Chou, S. W. (2010). The optimum conditions for preparing the lead-free piezoelectric ceramic of Bi05Na05TiO3 using the Taguchi method. Powder technology, 199(3), 264-271.
[29] Srivastava, V. C., Mall, I. D., Mishra, I. M. (2006). Equilibrium modelling of single and binary adsorption of cadmium and nickel onto bagasse fly ash. Chemical engineering journal, 117(1), 79-91.