Exchange rates of O2 and CO2 between an algal culture and atmosphere |
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| Affiliation: | 1. Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5C9, Canada;2. Canadian Light Source, Saskatoon, Saskatchewan S7N 0X4, Canada;3. Synchrotron Soleil, L''Orme des Merisiers, 91190 Saint-Aubin, France;1. Graduate Institute of Hydrological and Oceanic Sciences, National Central University, Taoyuan 320, Taiwan;2. Tainan Hydraulics Laboratory, Tainan 709, Taiwan;3. International Wave Dynamics Research Center, National Cheng-Kung University, Tainan 701, Taiwan;1. Department of Biology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada;2. Helmholtz Centre for Environmental Research - UFZ, Department of Lake Research, D-39114 Magdeburg, Germany;3. University of Michigan Water Center, Graham Sustainability Institute, University of Michigan, Ann Arbor, MI 48103, USA;4. Department of Earth and Environmental Sciences, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada;1. Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China;2. Poyang Lake Research Center, Jiangxi Academy of Sciences, Nanchang 330096, China;3. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;4. Key Laboratory of Watershed Science and Health of Zhejiang Province, School of Environmental Science and Public Health, Wenzhou Medical University, Wenzhou 325035, China |
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| Abstract: | The mechanism of CO2 and O2 exchange between atmosphere and an algal mini-pond was examined by monitoring, with a novel microcomputer based system, pH, dissolved oxygen, turbidity, light intensity and temperature. The microcomputer based system was also used to monitor on-line the net oxygen production rate (OPR) and the gas exchange processes. The measured data support the assumption that the gas exchange is driven by the gradient of the partial pressure of the gases across the imaginary boundary layer (z layer). An analytical model based on this assumption was simulated by a computer and compared with the experimental data. The photosynthetic activity of a blue-green alga (Spirulina platensis) mini-pond as it is influenced by the CO2 concentration in the growth medium is discussed. The overall photosynthetic process was studied by comparing the experimental data with a mathematical model, evaluating the effectiveness of alternative carbon sources. |
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