Bentazon removal from aqueous solution by reverse osmosis; optimization of effective parameters using response surface methodology

Document Type: Research Paper


1 Department of Chemical Engineering, University of Sistan and Baluchestan, Zahedan, Iran

2 Department of Chemical Technologies, Iranian Research Organization for Science and Technology



Although bentazon is widely used as an agricultural herbicide, it is harmful to humans and poses many environmental threats. This study focused on the treatment of wastewater contaminated with bentazon pesticides using membrane technology. In this regard, low-pressure reverse osmosis (RO) was employed as it has already been used in the removal of other micro-pollutants. The effects of process variables on water flux and bentazon rejection were studied: temperature, pressure, and bentazon feed concentration. Based on central composite design (CCD), the quadratic model was engaged to correlate the process variables with the water flux and the bentazon removal responses. The obtained results showed that the bentazon rejection increased by enhancing the pressure while it decreased at higher feed solution concentration. However, with increasing temperature, the amount of bentazon removal was reduced. A bentazon rejection efficiency of 100 % could be achieved under optimum conditions (i.e., the temperature of 29.8 ℃ and hydrostatic pressure of 12.6 bar for a feed solution concentration of 66.9 mg/L). Therefore, reverse osmosis can effectively remove bentazon.


Main Subjects

[1] Aktar, W., Sengupta, D., Chowdhury, A. (2009). Impact of pesticides use in agriculture: their benefits and hazards. Interdisciplinary toxicology, 2(1), 1-12.

[2] El Bakouri, H., Morillo, J., Usero, J., Ouassini, A. (2008). Potential use of organic waste substances as an ecological technique to reduce pesticide ground water contamination. Journal of hydrology, 353(3-4), 335-342

[3] Benitez, F. J., Acero, J. L., Real, F. J. (2002). Degradation of carbofuran by using ozone, UV radiation and advanced oxidation processes. Journal of hazardous materials, 89(1), 51-65.

[4] Bolong, N., Ismail, A., Salim, M. R., Matsuura, T. (2009). A review of the effects of emerging contaminants in wastewater and options for their removal. Desalination, 239(1-3), 229-246

[5] Lin, C.-H., Lerch, R. N., Goyne, K. W., Garrett, H. E. (2011). Reducing herbicides and veterinary antibiotics losses from agroecosystems using vegetative buffers. Journal of environmental quality, 40(3), 791-799.

[6] Zhang, Y., Hou, Y., Chen, F., Xiao, Z., Zhang, J., Hu, X. (2011). The degradation of chlorpyrifos and diazinon in aqueous solution by ultrasonic irradiation: effect of parameters and degradation pathway. Chemosphere, 82(8), 1109-1115.

[7] Cycoń, M., Wójcik, M., Piotrowska-Seget, Z. (2009). Biodegradation of the organophosphorus insecticide diazinon by Serratia sp. and Pseudomonas sp. and their use in bioremediation of contaminated soil. Chemosphere, 76(4), 494-501.

[8] Maldonado, M., Malato, S., Pérez-Estrada, L., Gernjak, W., Oller, I., Doménech, X., Peral, J. (2006). Partial degradation of five pesticides and an industrial pollutant by ozonation in a pilot-plant scale reactor. Journal of hazardous materials, 138(2), 363-369.   

[9] Wu, J., Lan, C., Chan, G. Y. S. (2009). Organophosphorus pesticide ozonation and formation of oxon intermediates. Chemosphere, 76(9), 1308-1314.minerals: preparation and optical properties. Microporous and mesoporous materials, 51(2),91-138.

[10] Wang, Q., Lemley, A. T. (2002). Oxidation of diazinon by anodic Fenton treatment. Water research, 36(13), 3237-3244.

[11] Shemer, H., Linden, K. G. (2006). Degradation and by-product formation of diazinon in water during UV and UV/H2O2 treatment. Journal of hazardous materials, 136(3), 553-559.

[12] Daneshvar, N., Aber, S., Dorraji, M. S., Khataee, A., Rasoulifard, M. (2007). Photocatalytic degradation of the insecticide diazinon in the presence of prepared nanocrystalline ZnO powders under irradiation of UV-C light. Separation and purification technology, 58(1), 91-98.

[13] Kouloumbos, V. N., Tsipi, D. F., Hiskia, A. E., Nikolic, D., van Breemen, R. B. (2003). Identification of photocatalytic degradation products of diazinon in TiO2 aqueous suspensions using GC/MS/MS and LC/MS with quadrupole time-of-flight mass spectrometry. Journal of the American society for mass spectrometry, 14(8), 803-817.

[14] Merabet, S., Bouzaza, A., Wolbert, D. (2009). Photocatalytic degradation of indole in a circulating upflow reactor by UV/TiO2 process—Influence of some operating parameters. Journal of hazardous materials, 166(2-3), 1244-1249.

[15] Dražević, E., Košutić, K., Fingler, S., Drevenkar, V. (2011). Removal of pesticides from the water and their adsorption on the reverse osmosis membranes of defined porous structure. Desalination and water treatment, 30(1-3), 161-170.

[16] Plakas, K. V., Karabelas, A. J. (2012). Removal of pesticides from water by NF and RO membranes—A review. Desalination, 287, 255-265.

[17] Utami, W. N., Iqbal, R., Wenten, I. G. (2018). Rejection characteristics of organochlorine pesticides by low pressure reverse osmosis membrane. Jurnal air indonesia, 6(2), 103-108.

[18] Meister R.T., Berg G.L., Sine C., Meister R., Poplyk J. (1994). Farm chemicals handbook, 70th Eds., Meister Publishing Co., Willoughby, OH.

[19] EXTOXNE, T. (1996). Extension Toxicology Network-Pesticide Information Profiles. Copper sulfate.

[20] Hinden, H. (1969). Organic compounds removed by reverse osmosis. Water and sewage works, 116, 446-470.

[21] Chian, E. S., Bruce, W. N., Fang, H. H. (1975). Removal of pesticides by reverse osmosis. Environmental science and technology, 9(1), 52-59.

[22] Filteau, G., Moss, P. (1997). Ultra-low pressure RO membranes: an analysis of performance and cost. Desalination, 113(2-3), 147-152.

[23] Madsen, H. T., Søgaard, E. G. (2014). Applicability and modelling of nanofiltration and reverse osmosis for remediation of groundwater polluted with pesticides and pesticide transformation products. Separation and purification technology, 125, 111-119.

[24] Cui, Y., Ge, Q., Liu, X.-Y., Chung, T.-S. (2014). Novel forward osmosis process to effectively remove heavy metal ions. Journal of membrane science, 467, 188-194. 

[25] Nematzadeh, M., Samimi, A., Shokrollahzadeh, S. (2016). Application of sodium bicarbonate as draw solution in forward osmosis desalination: influence of temperature and linear flow velocity. Desalination and water treatment, 57(44), 20784-20791.

[26] Gurrala, P. K., Regalla, S. P. (2014). DOE based parametric study of volumetric change of FDM parts. Procedia materials science, 6, 354-360.

[27] Kucera, J. (2019). Biofouling of polyamide membranes: Fouling mechanisms, current mitigation and cleaning strategies, and future prospects. Membranes, 9(9), 111.

[28] Genç, N., Doğan, E. C., Narcı, A. O., Bican, E. (2017). Multi‐Response Optimization of Process Parameters for Imidacloprid Removal by Reverse Osmosis Using Taguchi Design. Water environment research, 89(5), 440-450. 

[29] Khanzada, N. K., Farid, M. U., Kharraz, J. A., Choi, J., Tang, C. Y., Nghiem, L. D., Jang, A., An, A. K. (2020). Removal of organic micropollutants using advanced membrane-based water and wastewater treatment: A review. Journal of membrane science, 598, 117672.

[30] Nghiem, L., Manis, A., Soldenhoff, K., Schäfer, A. (2004). Wastewater Treatment for Estrogenic Hormone Removal Using NF/RO Membranes. Journal of membrane science, 242(1-2), 37-45.

[31] Albergamo, V., Blankert, B., Cornelissen, E. R., Hofs, B., Knibbe, W.-J., van der Meer, W., de Voogt, P. (2019). Removal of polar organic micropollutants by pilot-scale reverse osmosis drinking water treatment. Water research, 148, 535-545.