ROLE OF ION PAIRS AND ACTIVITY IN ESTIMATION OF IONIC STRENGTH FROM ELECTRICAL CONDUCTIVITY OF IRRIGATION WATER
DOI:
https://doi.org/10.36103/ijas.v54i3.1758Keywords:
ionic strength, ion pairs, activity, irrigation water.Abstract
This study was carried out in Erbil governorate, Iraq during 2020 to estimate the regression relations between the ionic strength of 354 water samples and their electrical conductivity then influence of correcting ion pairs and activity on this relation. Results indicated that electrical conductivity regards as an accurate measure of ionic strength for irrigation water. Correcting ion pairs plus activity had a great effect on the regression values between ionic strength values and electrical conductivity of the studied water samples. Highly significant correlation coefficient was recorded between ionic strength and electrical conductivity before correction and after correcting ion pairs and ion pairs plus activity with the correlation coefficient values of (r= 0.99**, 0.93** and 0.97**) respectively. Correcting ion pairs and ion pairs plus activity caused a decrease in the slope of the regression from 0.0157 to 0.0104 and 0.0047 respectively. Neglecting intercept values from the regression line caused an increase in the slope of regression relation to 0.0112 and 0.0058 for correcting ion pairs and ion pairs plus activity respectively.
References
Adams, F. 1971. Ionic concentration and activities in soil solutions. Soil Sci. Amer. Proc.18(2):155-17
Alani, A. S. 2015. The Chemical Composition of Irrigation Water and It Is Effect on Ion Pairing, Some Chemical Properties of Soil and Plant Growth, Erbil- Kurdistan region-Iraq. M.Sc. Thesis. College of Agri. Salahaddin University. Iraq. pp: 58-68
Alhadithi, A and M. Hassan 2018. Evaluation of groundwater quality using water quality index (WQI) and GIS techniques. Iraqi Journal of Agricultural Sciences: 49 (2): 313-326. https://doi.org/10.36103/ijas.v49i2.236
American Public Health Association (A. P. H. A.). 2000. Standard methods for the examination of water and wastewater. 17th ed. A. P. H. A., Washington
Baba, A.B.A., 2020. Impacts of natural processes and anthropogenic activities on the water quality of Dukan catchment area IKR-Iraq. Ph.D. Thesis. College of Agriculture University of Sulaimani, Kurdistan region -Iraq.
Bohn, H. L., B. H. Mcneal and G. A. O, Conner. 1985. Soil Chemistry. John Wiliey and Sons, New York.
Butler, J. N. 1964. Ionic equilibrium. A mathematical approach. Addison- Westly Co. Reading. Mass. p.438
Davies, C. W. 1962. Ion association. Butterworth's and co. Ltd. London.
Dizayee.R.2018. Effects of Illegal Wells on Groundwater Level in the Central Sub-basin, Erbil Basin, Erbil, Kurdistan Region-Iraq. American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) Volume 39, No 1, pp 244-249
Esmail, A. O. 1992. Effect of ionic composition and ion pairs in irrigation water on soil and plant. Ph D. Thesis, College of Agriculture, Baghdad Univ. Iraq. (In Arabic).
Esmail, A. O. 2001. Role of ionic activity in relation between ionic strength and electrical conductivity of ground water in Arbil plain. Journal of Dohuk University. Vol. (4) No. (2):73-77
Garrels, R. M. and C. H. Christ. 1965. Solutions, minerals, and equilibria. Harper and Row. New York
Griffin, R. A. and J. J. Jurinak 1973. Estimation of activity coefficients from the electrical conductivity of natural aquatic systems and Soil extracts. Soil Sci. 116: 26-30
Hassan, D. F., A. A. Jafaar and R. J. Mohammad. 2019. Effect of Irrigation Water Salinity and Tillage Systems on Some Physical Soil Properties. Iraqi Journal of Agricultural Sciences: 50 (Special Issue): Pp :42-47. https://doi.org/10.36103/ijas.v50iSpecial.175
Jeff, W. 1988. Soil solution (Soil soln. BAS). A program for computation of ion activities of solution components. Tennessee. Knoxville Univ.
M.A.W.R., 2013, November. Ministry of agriculture and water resources in conferences activities. Collage of Engineering, Erbil
Mam Rasul, Gh. A. 2000. Study of Water Quality and Its Effect on Nutrients Availability for Corn in Sulaimani Region. M.Sc. Thesis. College of Agriculture, Suleimani Univ. Iraq.
Ponnamperuma, F. N., E. M. Tianco and T. A. Loy 1966. Ionic strengths of solutions of flooded soils and other natural aqueous solutions from specific conductance, Soil Sci. 102:408-413
Rajab, K. S. 2015. Classification of Some Groundwater for Irrigation Purpose Dependingon IWQI in Erbil Plain-Iraqi KurdistanRegion. M.Sc. Thesis. Salahaddin University-Erbil, College of Agriculture, Dept. of Soil andWater. pp: 73-79
Rajab,K.S and.A.O. Esmail 2020. Effect of ion pairs on decrease the risk of using saline water for irrigation. Iraqi Journal of Agricultural Sciences -51(2):637-643. https://doi.org/10.36103/ijas.v51i2.991
Salih, H. O. 2008. The role of ionic activity in classification of some groundwater on soil chemical properties and wheat yield in Erbil plain. MSc. Thesis, College of Agriculture /Salahaddin Univ. /Iraq
Salem, B.M., 2019. Identifying water suitability for different uses in Rania district/Sulaimani governorate/Kurdistan region/Iraq. M. Sc. Thesis. College of Agriculture Salahaddin University- Erbil
Sajadi, D. M. D. and A.O. Esmail,.2020. Comparison Between Groundwater Quality at North East and South West of Erbil Governorate for Irrigation Using Some Global Systems and Principal Component Analysis. Al-Qadisiyah Journal For Agriculture Sciences (QJAS). ISSN : 2618-1479 Vol.10, Issue. 2 ,(2020), pp.308-324
Saloom, H. S. and I. A M. Oleiwi. 2017. Evaluation of irrigation water quality index (iwqi) for main Iraqi rivers (Tigris, Euphrates, Shatt Al-Arab and Diyala). Iraqi Journal of Agricultural Sciences: (4) 48: 1010-1020. https://doi.org/10.36103/ijas.v48i4.358
UNDP, Drought Impact Assessment, Recovery and Mitigation Framework and Regional Project Design in Kurdistan Region, 2010.
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