Synthesis of clinoptilolite nanozeolite granules modified with ammonium bromide ligand to investigate the efficiency of nitrate removal from water in a continuous reactor

Document Type : Research Paper

Authors

Department of Environmental Sciences and Engineering, Faculty of Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran

Abstract

Due to participation in the process of eutrophication, nitrate has caused a lot of damage to the environment. In this research, Clinoptilolite nanozeolite granules modified by hexadecyltrimethylammonium bromide surfactant named HD-Clinoptilolite were synthesized. The clinoptilolite zeolite of Sabzevar region was converted into nanozeolite by ball mill and then its granules were prepared. In this study, a continuous reactor with a fixed bed equipped with a peristaltic pump has been used to provide the necessary flow to remove nitrate from polluted water. For adsorption process, a continuous flow reactor with a diameter of 3 cm and a height of 54 cm, for investigation of pH parameters, flow intensity, initial concentration, and column height have been fabricated. A Uv-vis Array spectrophotometer was used to measure nitrate. Also, Thomas, Bohart-Adams, and Yoon-Nelson models have been used to predict column behavior. According to the results, with increasing nitrate concentration, the adsorption capacity increased from 3.16 to 95.21 due to the increased presence of nitrate ions. Also, with increasing pH and column height, the adsorption capacity increased, while with increasing flow intensity, the adsorption capacity decreased due to the reduction of contact time. The highest adsorption capacity occurred at a concentration of 200, pH equal to 8 and a column height of 54 cm. At a column height of 54 cm, the adsorption capacity is equal to 91.26 mg/g. The results indicate that the clinoptilolite nanozeolite granules modified with ammonium bromide ligand has the ability to remove nitrate from drinking water to a high extent.

Keywords

Main Subjects


Synthesis of clinoptilolite nanozeolite granules modified with ammonium bromide ligand to investigate the efficiency of nitrate removal from water in a continuous reactor

EXTENDED ABSTRACT

Introduction

Nitrate is one of the most common chemical pollutants in underground water in the world. Factors such as nitrate fertilizers are the most important source of nitrate pollution in surface and underground waters (Atabati et al. 2022). The disposal of untreated urban and industrial wastewaters into surface and underground waters and the discharge of waste water treatment plants and the excessive use of nitrogenous fertilizers in agriculture have caused an increase in the concentration of nitrates in water environments. Today, there are various methods for water purification that can be used in this field (Zolfaghari et al., 2011; Zolfaghari and Kargar, 2019). Among the methods that have been used so far to remove nitrate from water resources, we can mention chemical reduction, surface adsorption, ion exchange, sedimentation, membrane-based separation, denitrification, chemical precipitation, and reverse osmosis. Natural zeolite adsorbent has fine pores and consists of aluminosilicate. Also, high ion exchange capability, high efficiency, quick and complete removal of pollutants, easy access, and low cost are other features that make this adsorbent one of the best adsorbents for nitrate removal from water sources.

Material and Methodes

In this research, Clinoptilolite nanozeolite granules modified by hexadecyltrimethylammonium bromide surfactant named HD-Clinoptilolite were synthesized. For this purpose, natural clinoptilolite zeolite from Sabzevar region was first prepared and Ball mill was used to reduce the size of zeolite particles to nano dimensions. In this study, a continuous reactor with a fixed bed equipped with a peristaltic pump has been used to provide the necessary flow to remove nitrate from polluted water. For adsorption process, a continuous flow reactor with a diameter of 3 cm and a height of 54 cm, for investigation of pH parameters, flow intensity, initial concentration, and column height have been fabricated. A Uv-vis Array spectrophotometer was used to measure nitrate. To determine the chemical composition of zeolite from X-Ray Fluorescence (XRF), to check the crystal structure from X-Ray Diffraction (XRD), to determine the size of nanoparticles from Transmission Electron Microscopy (TEM), and to detect the functionalization of zeolite with surfactant from Fourier-transform infrared spectroscopy (FTIR) method was used.

Results and Disscusion

The images obtained from the electron microscope show that the nano zeolite particles are in the range of 50 to 400 nm. The results showed that with the increase in nitrate concentration, the adsorption capacity increases from 3.16 to 21.95 (more than 30 times) due to the increase in the presence of nitrate ions. The results show that by increasing the height of the column containing nanozeolite adsorbent, the adsorption capacity increases from 54.04 to 63.38 mg/g. As the height increases, the contact time between nitrate and zeolite and the number of available active sites increase. The highest adsorption capacity occurred at a concentration of 200, pH equal to 8 and a column height of 54 cm. At a column height of 54 cm, the adsorption capacity was equal to 91.26 mg/g.

Conclusion

The results indicate that the clinoptilolite nanozeolite granules modified with ammonium bromide ligand has the ability to remove nitrate from drinking water to a high extent. It is suggested that this study be done on a larger scale and in fluidize bed columns to compare the results.

Akbari Binabaj, M., Nowee, S.M., & Ramezanian, N. (2015). An overview of new method for removing hexavalent chromium from industrial wastewater in the last decade. Iranian Chemical Engineering Journal, 14(79):61-79 (In Persian).
Arabi, F., & Askari, G. (2003).Investigation of nitrate removal process from aqueous solution by zeolite modified with surfactant hexadecyltrimethylammonium bromide. 16th National Environmental Health Conference Iran, Tabtiz University of Medical Sciences (In Persian).
Atabati, A., Adab, H., Zolfaghari, G., & Nasrabadi, M. (2022). Modeling groundwater nitrate concentrations using spatial and non-spatial regression models in a semi-arid environment. Water Science and Engineering, 15 (3), 218-227.
Banafsheafshan, S., Jonidi Jafari, H., Rezaei Kalantary, R., & Esrafily, A. (2016). Purification method of industrial waste water with hexavalent chromium removal. Commonity Health, 3(3):219-227 (In Persian).
Banshi, M. Evaluation of the performance of anionic resins and simultaneous removal of organic and inorganic pollutants from water. Master's thesis, 2002, Faculty of Health, University of Tehran (In Persian).
Bhatnagar, A., & Sillanpaa, M. (2011). A review of emerging adsorbents for nitrate removal from water. Chemical Engineering Journal, 168, 493–504.
Chatterjee, S., Lee, D.S., Lee, M.W., & Woo, S.H. (2009). Nitrate removal from aqueous solutions by cross-linked chitosan beads conditioned with sodium bisulfate. Journal of Hazardous Materials, 166(1):508-13.
Cho, D.W., Chon, C.M., Jeon, B.H., Kim, Y., Khan, M.A., & Song, H. (2010).The role of clay minerals in the reduction of nitrate in groundwater by zero-valent iron. Chemosphere, 81(5):611-6.
Esmaili Sari, A., Zolfaghari, G., Ghasempouri, S. M., Shayegh, S. S, & Hasani Tabatabei, M. (2007). Effect of age, gender, years of practice, specialty and number of amalgam restorations on mercury concentration in nails of dentists practicing in Tehran. Journal of Iranian Dental Association, 19(1), 97-104 (in Persian).
Fatemi, K., Sayyari, R., Mohajerani, H., Rezvaniyanzadeh, M., Ghasemi, M., Shafiei, R., & Gheysari, O. (2011). Separation of UO22+ and F- by γ-Alumina from aqueous solutions containing NO3- and F-. Journal of Nuclear Science and Technology (JONSAT), 31(4): 25-36 (In Persian).
Jahed Khaniki, G.R, Mahdavi M., Ghasri, A., & Saeednia, S. (2088). Investigation of nitrate concentration in some bottle water available in Tehran. Iranian Journal of Health and Environment, 1(1):45-50 (In Persian).
Karpuzcu, M.E., & Stringfellow, W.T. (2012). Kinetics of nitrate removal in wetlands receiving agricultural drainage. Ecological Engineering, 42: 295-303.
Arulkumar, M., Thirumalai, K., Sathishkumar, P., & Palannan, T. (2012). Rapid removal of chromium from aqurous solution using shell activeated carbon", Chemical Engineering Journal, 185-186:178- 186.
Sarioglu, M. (2005). Removal of ammonium from municipal water using natural Turkish (Dogantepe) Solute. Separation and Purification Technology, 41, 1-11.
Malakootian, M., Fatehizadeh, A., & Ehrampoush, M.H. (2011). Nitrate removal from aqueous solutions by nanofiltration. Desalination and Water Treatment, 29(1-3): 326-30.
Malakootian, M., Yousefi, N., & Fatehizadeh, A. (2011). Survey efficiency of electrocoagulation on nitrate removal from aqueous solution. International Journal of Environmental Science and Technology, 8(1): 107-14.
Misiti, T.M., Hajaya, M.G., & Pavlostathis, S.G. (2011). Nitrate reduction in a simulated free-water surface wetland system.Water research, 45(17): 5587-98.
Moussavi, S., & Asadi, H. (2011). Nitrate removal from groundwater by Purolite A-400 resin in a fixed bed column. Water and Soil Science, 21(4): 17-34 (In Persian).
Naeej, O.B., Mohseni Bandpi, A., Jonidi Jafari, A., Esrafili, A., & Rezaei Kalantary, R. (2012). Removal of Nitrate from Water using Supported Zero-Valent  Nano Iron on Zeolite. Iranian Journal of Health and Environment, 5(3) : 343-354 (In Persian).
Nepton, M., Nahvinia, M. J., Mozaffari, J., & Zendehdel, M. (2023). Investigation of zeolite efficiency in nitrate removal from urban wastewater by Fe3O4 nano particles in industrial scale. Iranian Water Researches Journal, 17(2): 111-120. doi: 10.22034/iwrj.2023.14219.2490 (In Persian).
Neisi, A., Babaei, A., Vosoughi, M., & Mozaffari, S. (2016). Performance evaluation of hexadecyltrimethyl ammonium chloride (HDTMA-CL) and cetylpyridinium bromide (CPB) modified zeolite clinopitolite in removal of nitrates from aqueous solutions. The Journal of Rafsanjan University of Medical Sciences, 15 (4): 343-354 (In Persian).
Rahmani, A.R, Solaimany, Aminabad, M, Asgari, G., & Barjasteh Askari, F. (2011). Removal of nitrate by MgCL2- modifed pumice and zero-valent magnesium from aqueous solution. Iranian Journal of Health and Environment, 3(4):461-74 (In Persian).
Rodríguez-Maroto, J., García-Herruzo, F., García-Rubio, A., Gómez-Lahoz, C., & Vereda-Alonso, C. (2009). Kinetics of the chemical reduction of nitrate by zero-valent iron. Chemosphere, 74(6):804-9.
Torabi, M. and Mokhatab, S. Principles of designing chemical reactors (Volume 1). Publications of Jihad University Industrial Unit Amir Kabir. First Edition, 1999, Page 111-150 (In Persian).
Tyagi, S., Rawtani, D., Khatri, N., & Tharmavaram, M. (2018). Strategies for Nitrate removal from aqueous environment using Nanotechnology: A Review. Journal of Water Process Engineering, 21, 84–95.
Wang, S., & Peng, Y. (2010). Natural zeolites as effective adsorbents in water and wastewater treatment. Chemical Engineering Journal, 156(1):11-24
Zolfaghari, G. (2018a). Risk assessment of mercury and lead in fish species from Iranian international wetlands. MethodsX, 5, 438–447.
Zolfaghari, G., Akhgari Sang Atash, Z., & Sazgar, A. (2018b). Baseline heavy metals in plant species from some industrial and rural areas: Carcinogenic and non-carcinogenic risk assessment. MethodsX, 5, 43-60.
Zolfaghari, G., Delsooz, M., & Rajaee, S. (2016). Study of mercury pollution in water, sediments, and fish from Hamoon international wetland. Journal of Water and Wastewater, 27 (5), 25-37 (in Persian).
Zolfaghari, G., Esmaili Sari, A., Ghasempouri, S. M., Ghorbani, F., Ahmadifard, N., & Shokri, N. (2006). Relationship beetween age, gender and weight with mercury concentration in different organs of Chalcalburnus chalcalburnus from Anzali wetland. Iranian Journal of Marine Science and Technology, 5(3-4), 23-31 (in Persian).
Zolfaghari, G., Esmaili-Sari, A., & Younesi, H. (2011). Surface modification of ordered nanoporous carbons CMK-3 via a chemical oxidation approach and its application in removal of lead pollution from water. Proceedings of the 2nd International Conference on Environmental Science and Technology, Proceedings of the 2nd International Conference on Environmental Science and Technology, IPCBEE, 6, 174-178.
Zolfaghari, G., & Kargar, M. (2019). Nanofiltration and microfiltration for the removal of chromium, total dissolved solids, and sulfate from water. MethodsX, 6, 549–557.