| Hot Spring is widely distributed in China. It also has abundant resources. HotSpring development has an extensive future. The mineralization of hot spring water iscomplex and its mineral components are rich. However, the chemical testing standardof hot spring is still empty in our country. The accurate analysis of minerals especiallyprice change elements in hot spring water can make it be used better. Only existingforms and variation of the price change elements in hot spring water are obtainedaccurately can a scientific basis for development and utilization of hot spring isprovided.Due to the unstable chemical nature of hot spring water, the data of hot springwater which are obtained by experimental routine analytical methods are often notstable enough and its accuracy is relatively low. In addition, the price change elementsvariation of hot spring water becomes difficult to analyze and conclude. This thesisaims to establish thermodynamic model of the price change elements by itsthermodynamic properties so as to simulate and analyze the price change elements. Inaddition, the variation and influencing factors of price change elements in hot springwater can be understood. The Eh-pH diagram is used to identify the exsiting formsand the acidity change of price change in hot spring water. It is also used to identifyvarious exsiting forms of the price change which changes with the temperature in hotspring water. By mastering variation of change price elements in hot spring water, thebeneficial ingredients in hot spring are protected and used and the harmful ingredientsare treated in order to provide a scientific basis for the development and utilization ofhot spring water as well as the harmless treatment of waste hot spring water.Eh-pH diagram is a Belgian scientist Professor M.Pourbaix corrosion in the late1940s first Nernst equation based on the nature and substance of the proposed solutionis the advantage of a district map Eh-pH diagram is mainly used to describe the redox balance system, to reflect protons and electrons to balance the reaction system affectthe relationship, Eh-pH diagram simple, intuitive, helping chemists and geologicalpersonnel out of the abstract principles of chemical thermodynamics problems, hasbeen widely used in biological and chemical metallurgy geology. Focuses on thefeasibility of the Eh-pH diagram under the limitations and different temperaturesplotted in Fig. Although the Eh-pH has its limitations, such as high accuracy is notdrawn to guide the practice leads to obtain new data less reliable, but its visual displayof the law is objective and can be summarized applications.From the beginning of computer popularity in the1960s, there are lots ofresearches on Eh-pH phase diagram drawn by computer. The graphic algorithm is thekey issue to Eh-pH phase diagram using computer. With algorithm theory ofthermodynamically stable region (i.e. Predominance area phase diagram) appears, thisalgorithm has a major breakthrough in theory. Based on it, people study and develop alarge number of calculation procedures on computer Eh-pH phase diagrams,especially the predominance area algorithms and component elimination method andalgorithm design on computer Eh-pH programming. The study of Eh-pH computerdrawing methods is the research problem of algorithm. All chemists put a lot ofefforts for the algorithm research. In today, with the development of computer,compiling platform and language, algorithm also becomes the bottlenecks ofdevelopment and progress of Eh-pH diagram research. This chapter’s design toalgorithm provides theoretical basis for the programming and next chapter’sprogramming idea.In the process of drawing Eh-pH diagram, it needs a computer with strong internalmemory and CPU to ensure the operation efficiency so as to ensure the stability andsmooth operation. Because computer’s Windows operating system has a stronginternal memory management capability, it makes development and operation ofapplication software unrestricted and its interface is also friendly and beautiful.Therefore, the operating system of Microsoft Windows7is a very good operatingplatform for developing and using the database.Labview is a kind of program development environment which is developed byNational Instruments (NI) Company. It is similar to C and BASIC developmentenvironment, but the significant differences between Labview and other computerlanguages are: other computer languages adopt the code which is based on textlanguage. However, Labview uses the graphical editing language G programmingprogram and its generated program is manifested by the diagram form. Theconvenient functions and tools supplied by Labview software platform, such as the front panel can set the data input frame and data output frame, then editors can debugand inspect the procedures. The program board and each function board are used byeditors for programming. Based on the algorithm design ideas in last chapter, thischapter describes the procedure reliazation of entire Eh-pH phase diagram in detail. Inaddition, this chapter realizes the phase mapping under different temperatures.Labview is a kind of program development environment which is developed byNational Instruments (NI) Company. It is similar to C and BASIC developmentenvironment, but the significant differences between Labview and other computerlanguages are: other computer languages adopt the code which is based on textlanguage. However, Labview uses the graphical editing language G programmingprogram and its generated program is manifested by the diagram form. Theconvenient functions and tools supplied by Labview software platform, such as thefront panel can set the data input frame and data output frame, then editors can debugand inspect the procedures. The program board and each function board are used byeditors for programming. Based on the algorithm design ideas in last chapter, thischapter describes the procedure reliazation of entire Eh-pH phase diagram in detail. Inaddition, this chapter realizes the phase mapping under different temperatures.Conclusions in this thesis are as follows:(1) With different temperatures, the actual measured value is oxidation-reductionpotential in the hot spring water system. It explains the redox capacity of actual hotspring water system. However, the theoretical calculation value is the redox capacityof the particular element such as arsenic which is in a specific environment in thissystem. The two can not be compared directly.(2) Be able to explain the oxidation-reduction phenomenon of arsenic in hotspring water, arsenic mainly exists with As3+form in hot spring water. It gushes toearth surface, the water temperature decreases and the system oxide enhances. Inaddition, As3+is gradually oxidized to As5+and it exists with As5+form stablly at last.The theoretical calculation value proves that arsenic mainly exists with As3+form inthe underground hot spring water. When the water temperature reduces,oxidation-reduction potential of arsenic is also reduced and As3+is more easilyoxidized. Therefore, it induces all arsenic in hot spring water are quickly oxidized tohigh arsenic after flooding out of earth surface.(3) Temperature change of hot spring water affects its analysis and measurement.It especially affects the morphological analysis of price change elements. Therefore, itmust be paid enough attention to the analysis in hot spring water. |
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