Simple Arrhenius-type function accurately predicts dissolved oxygen saturation concentrations in aquatic systems |
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| Authors: | Alireza Bahadori Hari B Vuthaluru |
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| Institution: | 1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, People''s Republic of China;2. CNRS and University of Lille 1, Laboratory of Oceanology and Geosciences, UMR 8187 LOG, 62930 Wimereux, France;1. Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini street, Cairo, Egypt;2. Analytical Chemistry Department, Faculty of Pharmacy, Egyptian Russian University, Badr City, Cairo, Egypt;3. Analytical Chemistry Department, Faculty of Pharmacy, Al-Azhar University, Nasr City, Cairo, Egypt;4. Analytical Chemistry Department, Faculty of Pharmacy, Future University, Fifth Settlement, Cairo, Egypt;1. IPMA, Instituto Português do Mar e da Atmosfera, Rua C do Aeroporto, 1749-077 Lisbon, Portugal;2. Centre of Oceanography, Faculty of Science, University of Lisbon, Campo Grande, 1749-016, Lisbon, Portugal;3. CIMAR/CIIMAR — Interdisciplinary Centre of Marine and Environmental Research, Porto, Portugal;4. Department of Geosciences, Environment and Spatial Planning, University of Porto, Porto, Portugal;5. Plymouth Marine Laboratory, Prospect Place, PL1 3DH Plymouth, UK |
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| Abstract: | A sufficient supply of dissolved oxygen (DO) is vital for life in higher organisms. In aquatic systems, oxygen regulates respiratory metabolism, mediates biogeochemical cycles, and is an integral component of water quality. In this work, a simple predictive tool for dissolved oxygen saturation concentrations in aquatic systems as a function of chloride concentration and temperature using a novel Arrhenius-type asymptotic exponential function has been formulated. The proposed method predicts the amount of dissolved oxygen saturation concentrations for temperatures up to 50 °C and chloride concentrations up to 25 g/l. Estimations are found to be in excellent agreement with the reliable data in the literature with average absolute deviation being 3%. The tool developed in this study can be of immense practical value for the engineers and scientists to have a quick check on the oxygen saturation concentrations in aquatic systems at various conditions without opting for any experimental measurements. In particular, environmental science experts would find the proposed approach to be user-friendly with transparent calculations involving no complex expressions. |
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