Determination of thiocyanate in the vacuum carbonate desulfurization wastewater |
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| Authors: | Luyuan Wang Lin Dong Wenhui Song |
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| Institution: | 1. Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, PR China;2. Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, PR China;1. Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing 100084, China;2. Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China;1. Department of Chemistry and Bioengineering, Tampere University of Technology, Tampere 33101, Finland;2. Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan;3. Center of Bioscience and Biotechnology, National Cheng Kung University, Tainan 701, Taiwan;4. Department of Environmental Engineering, National Cheng Kung University, Tainan 701, Taiwan;5. Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan |
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| Abstract: | In acidic solution, thiocyanate molecules reacted with ferric ions to produce red complexes. The concentration of thiocyanate could be determined by spectrophotometer. The effects of wavelength, volume of color reagent, acidity and color time on absorbance were investigated. The interferences of co-existing ion were discussed as well. Results showed that the relation between absorbance and the concentration of thiocyanate was in accord with Beer's law when the concentration of thiocyanate was 2–20 mg/L. The linear regression equation was Absorbance = 0.0523Concentration–0.0156, with a linear correlation coefficient of 0.9997. The average recovery rates of two kinds of vacuum carbonate desulfurization wastewater were 100.95% and 99.62%, and relative standard deviations were 0.79% and 0.14% respectively. It shows that the method was quick, high precision, accurate and easy to handle. |
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| Keywords: | thiocyanate spectrophotometry desulfurization wastewater |
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