ELECTROCOAGULATION USING STAINLESS STEEL ANODES: THE REMOVAL OF NITRATE FROM AGRO-BASED GROUNDWATER

Year 2025, Volume: 11 Issue: 1, 32 - 42, 29.06.2025

Benan Yazıcı Karabulut

https://doi.org/10.51477/mejs.1624640

Abstract

This study covers groundwater treatment for nitrate (NO3-) removal by the electrocoagulation (EC) method for March (pre-irrigation) and October (post-irrigation) of 2023 for ten observation points in an arid and semi-arid region. Stainless steel (SS) plate electrodes were used in the process, and energy consumption and cost assessment were also carried out. The study area is covered with fertile agricultural lands, and the people of the region make their living from agricultural activities. Therefore, the actual groundwater samples used in the study contain high concentrations of NO3-. The effectiveness of the main operational parameters, such as initial pH, electrical conductivity, and current density, was analyzed. It was observed that nitrate removal at the highest electrical conductivity value (2239 µS/cm) had the lowest energy consumption value (0.81 kWh/m3). The SS values measured at the end of the EC process were < 0.4. In other words, the SS value passing into the water is very low and has no adverse effect on human health. In this study specific to the Harran Plain, a cost of $1.06 per m3 was calculated for nitrate removal using current electricity costs.

Keywords

Electrocoagulation , energy consumption , nitrate removal , stainless steel

Ethical Statement

The author declares that this document does not require an ethics committee approval or any special permission. This study does not cause any harm to the environment.

References

• Nasrullah, M., Siddique, M., Zularisam, A., “Effect of high current density in electrocoagulation process for sewage treatment”. Asian Journal of Chemistry, 26(14), 4281-4285, 2014. Doi: 10.14233/ajchem.2014.16134.
• Bharath, M., Krishna, B.M., “Electrocoagulation treatment for landfill leachate using stainless steel electrode”. International Journal of Engineering and Advanced Technology, 9(1), 2851-2855, 2019. Doi: 10.35940/ijeat.a9807.109119.
• Lacasa, E., Cañizares, P., Sáez, C., Fernández, F., Rodrigo, M., “Removal of nitrates from groundwater by electrocoagulation”. Chemical Engineering Journal, 171(3), 1012-1017, 2011. Doi: 10.1016/j.cej.2011.04.053.
• Dehghani, M., Hoseini, M., Fath-Aabaadi, M., Elhamiyan, Z., Shamsedini, N., Ghanbarian, M., …, Baghani, A., “Optimizing electrocoagulation process for the removal of nitrate from aqueous solution.” Jundishapur Journal of Health Sciences, 8(1), 2016. Doi: 10.17795/jjhs-31095.
• Amarine, M., Lekhlif, B., Mliji, E., Echaabi, J., “Nitrate removal from groundwater in Casablanca region (Morocco) by electrocoagulation”. Groundwater for Sustainable Development, 11, 100452, 2020. Doi: 10.1016/j.gsd.2020.100452.
• Hussein, R., Elmolla, A., Ahmed, A., Mohamed, A., “Effect of spacing of different types of electrodes in the electrocoagulation process”. Journal of Al-Azhar University Engineering Sector, 17(64), 919-931, 2022. Doi: 10.21608/auej.2022.253825.
• Yehya, T., Balla, W., Chafi, M., Audonnet, F., Vial, C., Essadki, A., …, Gourich, B., “Assessment of denitrification using electrocoagulation process”. The Canadian Journal of Chemical Engineering, 93(2), 241-248, 2014. Doi: 10.1002/cjce.22112.
• Apshankar, K., Goel, S., “Nitrate removal from drinking water using direct current or solar powered electrocoagulation”. SN Applied Sciences, 2(2), 2020. Doi: 10.1007/s42452-020-2069-9.
• Sun, J., Garg, S., Xie, J., Zhang, C., Waite, T., “Electrochemical reduction of nitrate with simultaneous ammonia recovery using a flow cathode reactor”. Environmental Science and Technology, 56(23), 17298-17309, 2022. Doi: 10.1021/acs.est.2c06033.
• Sun, J., “A novel integrated flow-electrode capacitive deionization and flow cathode system for nitrate removal and ammonia generation from simulated groundwater”. Environmental Science and Technology, 57(39), 14726-14736, 2023. Doi: 10.1021/acs.est.3c03922.
• Kargı, F., Pamukoglu, M.Y., “Adsorbent supplemented biological treatment of pre-treated landfill leachate by fed-batch operation”. Bioresource Technology, 94(3), 285-291, 2004. Doi: 10.1016/j.biortech.2004.01.003.
• Kargi, F., Pamukoglu, M.Y., “Simultaneous adsorption and biological treatment of pre-treated landfill leachate by fed-batch operation”. Process Biochemistry, 38(10), 1413-1420, 2003. Doi: 10.1016/S0032-9592(03)00030-X.
• Kalaruban, M., Loganathan, P., Kandasamy, J., Naidu, R., Vigneswaran, S., “Enhanced removal of nitrate in an integrated electrochemical-adsorption system”. Separation and Purification Technology, 189, 260-266, 2017. Doi: 10.1016/j.seppur.2017.08.010.
• Emiliani, B., Ariza, Y., Quiñones, D., Plaza, J., “Effect of operating conditions on the treatment of cr (vi) containing wastewater by electrocoagulation with aluminum and stainless steel electrodes”. Ecs Transactions, 100(1), 95-107, 2021. Doi: 10.1149/10001.0095ecst.
• El-hefny, R., Monem, N., “Treatment of groundwater by using the electrocoagulation technique”. Engineering Research Journal - Faculty of Engineering (Shoubra), 51(1), 50-55, 2022. Doi: 10.21608/erjsh.2022.224285.
• Yengejeh, S., Mansoorian, H., Majidi, G., Yari, A., Khanjani, N., “Efficiency of electrical coagulation process using aluminum electrodes for municipal wastewater treatment: a case study at karaj wastewater treatment plant”. Environmental Health Engineering and Management, 4(3), 157-162, 2017. Doi: 10.15171/ehem.2017.22.
• Mershed, B., “Nitrate removal from water using electrocoagulation with activated carbon”. Journal of Engineering Sciences and Information Technology, 6(2), 111-135, 2022. Doi: 10.26389/ajsrp.c130821.
• Amouei, A., Pouramir, M., Asgharnia, H., Mehdinia, M., Shirmardi, M., Fallah, H., …, Tabarinia, H., “Evaluation of the efficiency of electrocoagulation process in removing cyanide, nitrate, turbidity, and chemical oxygen demand from landfill leachate”. Environmental Health Engineering and Management, 8(3), 237-244, 2021. Doi: 10.34172/ehem.2021.27.
• Abdelshafy, N., Sadik, M., “Environment -friendly processes: electrocoagulation and activated carbon filtration for reuse of textile wastewater”. Egyptian Journal of Chemistry, 64(8), 3997-4003, 2021. Doi: 10.21608/ejchem.2021.63363.3358.
• Al-Marri, S., Alquzweeni, S., Hashim, K., Alkhaddar, R., Kot, P., Alkizwini, R., …, Al-Khafaji, Z., “Ultrasonic-electrocoagulation method for nitrate removal from water”. IOP Conference Series Materials Science and Engineering, 888(1), 012073, 2020. Doi: 10.1088/1757-899x/888/1/012073.
• Yazici Karabulut, B., Atasoy, A.D., Can, O.T. et al., “Electrocoagulation for nitrate removal in groundwater of intensive agricultural region: a case study of Harran plain, Turkey”. Environmental Earth Sciences, 80, 190, 2021. Doi: 10.1007/s12665-021-09488-8.
• Yazici Karabulut, B., Atasoy, A.D., Yesilnacar, M.I., “Removal of nitrate from aqueous solutions by batch electrocoagulation process using al and fe plate electrodes”. Harran University Journal of Engineering, 4, 79-88, 2019.
• Kahraman, N., Yazici Karabulut, B., Atasoy, A.D., Yeşilnacar, M.I., “Harran Ovası serbest akiferinde yaz ve kış dönemleri nitrat kirliliğinin araştırılması (2014- 2015)”. Harran Üniversitesi Mühendislik Dergisi, 2, 1-8, 2016.
• Majlesi, M., Mohseny, S.M., Sardar, M., Golmohammadi, S., Sheikhmohammadi, A., “Improvement of aqueous nitrate removal by using continuous electrocoagulation/electroflotation unit with vertical monopolar electrodes”, Sustainable Environment Research, 26, 287-290, 2016.
• Bensadok, K., Benammar, S., Lapicque, F., Nezzal, G., “Electrocoagulation of cutting oil emulsions using aluminium plate electrodes”. Journal of Hazardous Materials, 152, 423-430, 2018. Doi: 10.1016/j.jhazmat.2007.06.121
• Mahmood, R., Al-Musawi, N., “Evaluating electrocoagulation process for water treatment efficiency using response surface methodology”. Journal of Engineering, 26(9), 11-23, 2020. Doi: 10.31026/j.eng.2020.09.02.
• Gad, E., “Electrochemical treatment of industrial effluent and its impact on stainless steel corrosion”. International Journal of Electrochemical Science, 17(12), 221211, 2022. Doi: 10.20964/2022.12.14.
• Yazdanbakhsh AR, Kashefasl M, Zareh H, Agaiani E, Sardar M, Sheikhmohammadi A., “Thickening of biological sludge by electro-coagulation-fotation process”. International Journal of Electrochemical Science, 10(3), 746-756, 2015.
• Asaithambi, P., Beyene, D., Aziz, A. R. A., Alemayehu, E., “Removal of pollutants with determination of power consumption from landfill leachate wastewater using an electrocoagulation process: optimization using response surface methodology (RSM)”. Applied Water Science, 8, 1-12, 2018.
• Ozyonar, F., Karagozoglu, B., “Systematic assessment of electrocoagulation for the treatment of marble processing wastewater”. International Journal of Environmental Science and Technology, 9, 637-646, 2012.