1 Introduction Calcium sulfate deposition is one of the most important and serious problems faced by heat transfer equipment during operation(Pavlos et al.,1999;Liu et al.,1996).The crystallization of calcium sulfate ...1 Introduction Calcium sulfate deposition is one of the most important and serious problems faced by heat transfer equipment during operation(Pavlos et al.,1999;Liu et al.,1996).The crystallization of calcium sulfate is known as a major展开更多
1 Introduction There exist calcium and sulfate ions outside sodium chloride in solution mining for calcium sulfate brine.The calcium and sulfate ions not only affect the purity of the vacuum salt products,but also inc...1 Introduction There exist calcium and sulfate ions outside sodium chloride in solution mining for calcium sulfate brine.The calcium and sulfate ions not only affect the purity of the vacuum salt products,but also increase the scaling of vacuum evaporation tanks and brine reusing pipes.Additives have certain impacts on the crystallization dynamics(Randolph et al.,1971).The crystallization展开更多
A miniaturized atomic emission spectrometer was constructed,using a tungsten coil as the electrothermal excitation source and a handheld CCD spectrometer as the detection device.The limits of detection for calcium and...A miniaturized atomic emission spectrometer was constructed,using a tungsten coil as the electrothermal excitation source and a handheld CCD spectrometer as the detection device.The limits of detection for calcium and strontium with this new instrument were 0.03 and 0.02 mg/L,respectively, while the upper linear dynamic range for calcium andstrontium were 1000 and 400 mg/L,respectively.The proposed method was applied to simultaneous determination of calcium and strontium in synthesized brine samples,and the analytical results were in good agreement with those by ICP-AES.展开更多
基金financial support of National Nature Science Foundation (21376178)TIDA giant growth plan (2011-XJR13020)+3 种基金Tianjin Science and technology support program (12ZCDZSF06900)Tianjin University of Science and Technology fund for scientific research (20120119)Tianjin education commission program (20130509)Research fund for the doctoral program of higher education of China(20131208120001)
文摘1 Introduction Calcium sulfate deposition is one of the most important and serious problems faced by heat transfer equipment during operation(Pavlos et al.,1999;Liu et al.,1996).The crystallization of calcium sulfate is known as a major
基金financial support of National Nature Science Foundation (21376178)TIDA giant growth plan (2011-XJR13020)+3 种基金Tianjin Science and technology support program (12ZCDZSF06900)Tianjin University of Science and Technology fund for scientific research (20120119)Tianjin education commission program (20130509)Research fund for the doctoral program of higher education of China (20131208120001)
文摘1 Introduction There exist calcium and sulfate ions outside sodium chloride in solution mining for calcium sulfate brine.The calcium and sulfate ions not only affect the purity of the vacuum salt products,but also increase the scaling of vacuum evaporation tanks and brine reusing pipes.Additives have certain impacts on the crystallization dynamics(Randolph et al.,1971).The crystallization
文摘A miniaturized atomic emission spectrometer was constructed,using a tungsten coil as the electrothermal excitation source and a handheld CCD spectrometer as the detection device.The limits of detection for calcium and strontium with this new instrument were 0.03 and 0.02 mg/L,respectively, while the upper linear dynamic range for calcium andstrontium were 1000 and 400 mg/L,respectively.The proposed method was applied to simultaneous determination of calcium and strontium in synthesized brine samples,and the analytical results were in good agreement with those by ICP-AES.
