مهندسی اکوسیستم بیابان

مهندسی اکوسیستم بیابان

Investigating Salt Effect Correction for δ18O and δ2H in Saline/Brine Groundwater Samples

نوع مقاله : مقاله پژوهشی

نویسندگان
محمد میرزاوند 1
هدی قاسمیه 2
سید جواد ساداتی نژاد 3
رحیم باقری 4
جولین والتر 5
1 گروه علوم و فناوری‌های محیطی، دانشکده مهندسی انرژی و منابع پایدار، دانشگاه تهران، صندوق پستی: 141556619، تهران- ایران
2 دانشکده منابع طبیعی و علوم زمین، دانشگاه کاشان، کاشان، ایران
3 دانشکده مهندسی انرژی و ممنابع پایدار، دانشگاه تهران
4 گروه زمین شناسی، دانشگاه صنعتی شاهرود
5 Professor, Department of Applied Sciences, Université du Québec à Chicoutimi, Saguenay, QC, G7H 2B1, Canada
10.22052/deej.2024.254493.1047
چکیده
This study focuses on the Kashan Plain Aquifer (KPA), an emblematic case in Iran, where over-pumping groundwater intensifies salinity. Employing advanced isotopic techniques, specifically analyzing stable water molecule isotopes (δ18O and δ2H) through the Gasbench+DeltaPlusXP method, the current study addresses the intricate nature of saline waters by analyzing geochemistry and isotopes of 15 groundwater samples. It should be noted that the electric conductivity (EC) of the water samples varied from 2210 to 212000, with their mean value being 65499 μS/cm. The study also investigates the impact of salinity on isotopic values, considering ion hydration and salt effects that are crucial for accurate measurements. The results of the study revealed that δ18O values ranged between -8.4 to 6 and -8.38 to 6.48 % before and after salt effect correction, respectively. Moreover, it was found that the average δ18O values varied from -4.58 to -4.49 % before and after salt effect correction. In addition, the disparity between measured and corrected δ18O revealed the impact of MgCl2, and CaCl2 salts on δ18O in all collected samples. However, no difference was found between measured and corrected δ2H. Therefore, while the findings indicate the necessity of salinity correction for δ18O, it appears that salinity correction bears less significance for δ2H.
کلیدواژه‌ها
Environmental Isotopes
Activity
Saline Groundwater
Brine
Isotope Hydrology
موضوعات
  1. Bagheri, R., Nosrati, A., Jafari, H., Eggenkamp, H.G.M., & Mozafari, M., (2019). Overexploitation hazards and salinization risks in crucial declining aquifers, chemo-isotopic approaches. Hazardous Materials, 369, 150–163.
  2. Benetti, M., Sveinbjörnsdóttir, A.E Ólafsdóttir, R., Leng, M.J., Arrowsmith, C., Debondt, K., Fripiat, F., & Aloisi, G., (2017). Inter-comparison of salt effetc. correction for δ 18 O and δ 2 H measurements in seawater by CRDS and IRMS using the gas-H 2O equilibration method. Mar. Chem, 194, 114–123. https://doi.org/https://doi.org/10.1016/j.marchem. 2017.05.010.
  3. Clark, I.D., (2015). Groundwater Geochemistry and Isotopes. Taylor & Francis Group.
  4. Clark, I.D., & Fritz, P., (1997). Environmental Isotopes in Hydrogeology. CRC Press.
  5. Ghazifard, A., Moslehi, A., Safaei, H., & Roostaei, M., (2016). Effects of groundwater withdrawal on land subsidence in Kashan Plain, Iran. Bulletin of Engineering Geology and the Environment, 75, 1157–1168. https://doi.org/10.1007/s10064-016-0885-3
  6. Horita, J., Wesolowski, D.J., & Cole, D.R., (1993). The Activity-Composition Relationship of Oxygen and Hydrogen Isotopes in Aqueous Salt Solutions .1. Vapor-Liquid Water Equilibration of Single Salt Solutions from 50-Degrees-C to 100-Degrees-C. Geochim Cosmochim Acta 57, 2797–2817. https://doi.org/10.1016/0016-7037(93)90391-9
  7. Mirzavand, M., (2018). Determine the Origin and Mechanism of Groundwater Salination in Kashan Plain using Isotopic and Hydro-geochemical Methods.
  8. Mirzavand, M, Ghasemieh, H., Sadatinejad, S.J., & Bagheri, R., (2020a). An overview on source, mechanism, and investigation approaches in groundwater salinization studies. International Journal of Environmental Science and Technology. https://doi.org/10.1007/s13762-020-02647-7
  9. Mirzavand, M., Ghasemieh, H., Sadatinejad, SJ., & Bagheri, R., (2020b). Delineating the Source and Mechanism of Groundwater Salinization in Crucial Declining Aquifer Using Multi-Chemo-Isotopes Approaches. J Hydrol (Amst) https://doi.org/https://doi.org/10.1016/j.jhydrol.2020.124877
  10. Mirzavand, M., Ghasemieh, H., Sadatinejad, S.J., Bagheri, R., & Clark, I.D., (2018). Saltwater intrusion vulnerability assessment using AHP-GALDIT model in Kashan plain aquifer as critical aquifer in a semi-arid region. Desert 32, 255–264.
  11. Mirzavand, M., & Ghazavi, R., (2015). A Stochastic Modelling Technique for Groundwater Level Forecasting in an Arid Environment Using Time Series Methods. Water Resources Management 29, 1315–1328. https://doi.org/10.1007/s11269-014-0875-9
  12. Mirzavand, M., & Ghazban, F., (2022). Isotopic and hydrochemical evidence for the source and mechanism of groundwater salinization in Kashan Plain aquifer in Iran. Environmental Science and Pollution Research https://doi.org/10.1007/s11356-021-17457-8
  13. Mirzavand, M., & Walter, J., (2024). Delineating the mechanisms controlling groundwater salinization using chemo-isotopic data and meta-heuristic clustering algorithms (case study: Saguenay-Lac-Saint-Jean region in the Canadian Shield, Quebec, Canada). Environmental Science and Pollution Research. https://doi.org/10.1007/s11356-024-33922-6
  14. Sadatinejad, S.J., & Mirzavand, M., (2023). Saline groundwater (Hydrogeochemistry and Isotopes). Nuclear Science & Technology Research Institute Press, Tehran.
  15. Skrzypek, G., & Ford, D., (2014). Stable Isotope Analysis of Saline Water Samples on a Cavity Ring-down Spectroscopy Instrument. Environ Sci Technol 48, 2827–2834. https://doi.org/10.1021/es4049412
  16. Sofer, Z., & Gat, J., (1972). Activities and concentration of Oxygen-18 in concentrated Aqueous solutions: analytical and geophysical implications. Earth Planet Sci. Lett 15.
  17. Vengosh, A., (2005). Salinization and Saline Environments, in Sherwood Lollar, B., Holland, H.D., Turekian, K.K. (Eds.), Treatise on Geochemistry. Elsevier, 333–359.
  18. Walter, J., Chesnaux, R., Cloutier, V., Gaboury, D., (2017). The influence of water/rock − water/clay interactions and mixing in the salinization processes of groundwater. J Hydrol Reg Stud, 13, 168–188. https://doi.org/10.1016/j.ejrh.2017.07.004
مهندسی اکوسیستم بیابان
دوره 12، شماره 10و 11 انگلیسی
شهریور 1402
صفحه 81-88