Effect of anions interaction on the removal efficiency of nanofilters for the potable water treatment

Document Type : Research Paper


Department of Chemical Engineering, Faculty of Enginerring ,University of Isfahan, Isfahan, IRAN


The interaction between the ions and the charge of membranes can affect the efficiency of pollutant removal. The present study investigated the removal efficiency of hexavalent chromium and nitrate ions from both actual and synthetic contaminated water via two different commercial spiral wound polyamide nanofilters. In addition, the interaction of ions under different experimental conditions was investigated by using a Box-Behnken design (BBD). The Box–Behnken design optimized the contributing factors which included pH (5-9), the initial concentration of Cr (VI) (0.05-5 mg/L) and the initial concentration of nitrate (40-160 mg/L). The maximum removal efficiency of both Cr (VI) and nitrate was achieved at a pH of 9.0, as 99 % and 90 % for the Iranian nanofilter (NF-I) and 98 % and 82 % for the Korean nanofilter (NF-K), respectively. The results also indicated that as the initial concentration of Cr (VI) increased, the removal efficiency was enhanced while the removal efficiency of nitrate decreased according to the pH. However, by increasing the initial concentration of nitrate, the removal efficiency of both the Cr (VI) and nitrate increased. For actual water samples at an optimum pressure of 0.6 Mpa (NF-K) and 0.8 Mpa (NF-I), the removal efficiency of Cr(VI) and nitrate obtained was 95% and 76 % for the NF-K and 97 % and 86 % for the NF-I, respectively. 


Main Subjects

[1] Mohseni-Bandpi, A., Elliott, D. J., Zazouli, M. A. (2013). Biological nitrate removal processes from drinking water supply-a review. Journal of environmental health science and engineering, 11(1), 35.
[2] Epsztein, R., Nir, O., Lahav, O., Green, M. (2015). Selective nitrate removal from groundwater using a hybrid nanofiltration–reverse osmosis filtration scheme. Chemical engineering journal, 279, 372-378.
[3] Richard, A. M., Diaz, J. H., Kaye, A. D. (2014). Reexamining the risks of drinking-water nitrates on public health. The Ochsner journal, 14(3), 392-398.
[4] Baig, U., Rao, R. A. K., Khan, A. A., Sanagi, M. M., Gondal, M. A. (2015). Removal of carcinogenic hexavalent chromium from aqueous solutions using newly synthesized and characterized polypyrrole–titanium (IV) phosphate nanocomposite. Chemical engineering journal, 280, 494-504.
[5] Romero-Gonzalez, J., Peralta-Videa, J. R., Rodrıguez, E., Ramirez, S. L., Gardea-Torresdey, J. L. (2005). Determination of thermodynamic parameters of Cr (VI) adsorption from aqueous solution onto Agave lechuguilla biomass. The journal of chemical thermodynamics, 37(4), 343-347.
[6] World Health Organization. (2006). Guidelines for the safe use of wastewater, excreta and greywater
(Vol. 1). World Health Organization.
[7] Chakravarti, A. K., Chowdhury, S. B., Chakrabarty, S., Chakrabarty, T., Mukherjee, D. C. (1995). Liquid membrane multiple emulsion process of chromium (VI) separation from waste waters. Colloids and surfaces A: Physicochemical and engineering aspects, 103(1), 59-71.
[8] Calace, N., Di Muro, A., Nardi, E., Petronio, B. M., Pietroletti, M. (2002). Adsorption isotherms for describing heavy-metal retention in paper mill sludges. Industrial and engineering chemistry research, 41(22), 5491-5497.
[9] Tiravanti, G., Petruzzelli, D., Passino, R. (1997). Pretreatment of tannery wastewaters by an ion exchange process for Cr (III) removal and recovery. Water science and technology, 36(2-3), 197-207.
[10] Ayyasamy, P. M., Rajakumar, S., Sathishkumar, M., Swaminathan, K., Shanthi, K., Lakshmanaperumalsamy, P., Lee, S. (2009). Nitrate removal from synthetic medium and groundwater with aquatic macrophytes. Desalination, 242(1-3), 286-296.
[11] Aksu, Z., Kutsal, T. (1990). A comparative study for biosorption characteristics of heavy metal ions with C. vulgaris. Environmental technology, 11(10), 979-987.
[12] Aksu, Z., Özer, D., Ekiz, H. I., Kutsal, T., Çaglar, A. (1996). Investigation of biosorption of chromium (VI) on Cladophora crispata in two-staged batch reactor. Environmental technology, 17(2), 215-220.
[13] Bansal, M., Singh, D., Garg, V. K. (2009). A comparative study for the removal of hexavalent chromium from aqueous solution by agriculture wastes’ carbons. Journal of hazardous materials, 171(1), 83-92.
[14] Sharma, D. C., Forster, C. F. (1994). The treatment of chromium wastewaters using the sorptive potential of leaf mould. Bioresource technology, 49(1), 31-40.
[15] Paugam, L., Taha, S., Dorange, G., Jaouen, P., Quéméneur, F. (2004). Mechanism of nitrate ions transfer in nanofiltration depending on pressure, pH, concentration and medium composition. Journal of membrane science, 231(1), 37-46.
[16] Schaep, J., Van der Bruggen, B., Vandecasteele, C., Wilms, D. (1998). Retention mechanisms in nanofiltration. In chemistry for the protection of the environment 3 (pp. 117-125). Springer US.
[17] Yu, Y., Zhao, C., Wang, Y., Fan, W., Luan, Z. (2013). Effects of ion concentration and natural organic matter on arsenic (V) removal by nanofiltration under different transmembrane pressures. Journal of environmental sciences, 25(2), 302-307.
[18] Li, K., Wang, J., Liu, J., Wei, Y., Chen, M. (2016). Advanced treatment of municipal wastewater by nanofiltration: Operational optimization and membrane fouling analysis. Journal of environmental sciences, 43, 106-117.
[19] American public health association, American water works association, water pollution control federation, water environment federation. (1915). Standard methods for the examination of water and wastewater (Vol. 2). American public health association.
[20] Chakraborty, S., Dasgupta, J., Farooq, U., Sikder, J., Drioli, E., Curcio, S. (2014). Experimental analysis, modeling and optimization of chromium (VI) removal from aqueous solutions by polymer-enhanced ultrafiltration. Journal of membrane science, 456, 139-154.
[21] Myers, R. H., Montgomery, D. C., Anderson-Cook, C. M. (2016). Response surface methodology: Process and product optimization using designed experiments. John Wiley and Sons.
[22] Betianu, C., Caliman, F. A., Gavrilescu, M., Cretescu, I., Cojocaru, C., Poulios, I. (2008). Response surface methodology applied for Orange II photocatalytic degradation in TiO2 aqueous suspensions .Journal of chemical technology and biotechnology, 83(11), 1454-1465.
[23] Hafiane, A., Lemordant, D., Dhahbi, M. (2000). Removal of hexavalent chromium by nanofiltration. Desalination, 130(3), 305-312.
[24] Taleb-Ahmed, M., Taha, S., Maachi, R., Dorange, G. (2002). The influence of physico-chemistry on the retention of chromium ions during nanofiltration. Desalination, 145(1), 103-108.
[25] Santafé-Moros, A., Gozálvez-Zafrilla, J. M., Lora-García, J. (2005). Performance of commercial nanofiltration membranes in the removal of nitrate ions. Desalination, 185(1-3), 281-287.
[26] Mahmoodi, P., Hosseinzadeh Borazjani, H., Farhadian, M., Solaimany Nazar, A. R. (2015). Remediation of contaminated water from nitrate and diazinon by nanofiltration process. Desalination and Water Treatment, 53(11), 2948-2953.
[27] Mahmoodi, P., Farhadian, M., Solaimany Nazar, A. R., Noroozi, A. (2014). Interaction between diazinon and nitrate pollutant through membrane technology. Journal of Applied Research in Water and Wastewater, 1(1), 18-25.