A test of the maximum bubble pressure method for electrocapillary measurements |
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| Affiliation: | 1. Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, Arau, Perlis, 02600, Malaysia;2. School of Materials Engineering, Universiti Malaysia Perlis, Arau, Perlis, 02600, Malaysia;1. Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China;3. National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China;4. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, PR China;1. State Key Laboratory of Tribology, Key Laboratory for Advanced Materials Processing Technology Ministry of Education of China, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China;2. Key Lab for Advanced Materials Processing Technology of Education Ministry, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China;1. Department of Mathematical Sciences, Tsinghua University, Beijing 100084, China;2. Theory Lab, Central Research Institute, 2012 Labs, Huawei Technologies Co., Ltd., Hong Kong;1. Department of Pharmaceutical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China;2. Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin, 300350, China;1. Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand;2. Environmental Science Center, University of Tokyo, Tokyo, 113, Japan |
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| Abstract: | The reliability of the maximum bubble pressure method for electrocapillary measurements has been tested in aqueous and non-aqueous solutions. The results suggest that, although contact angle problems are actually eliminated by using this method, serious systematic errors may be observed. These errors are attributed to changes of the effective radius of the capillary tip, due to changes of the thickness of a wetting film formed between the mercury and the capillary wall. A detailed examination of these errors when we use siliconized and non-siliconized capillaries is presented and discussed. |
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