Speciation Of Sulfur Hot Spring Water

Hot Springs in China's use of more than 4,000 years of history, enrich people's lives and our culture.However, the spring in people's lives and social application has been minimal.In recent years, with the rapid economic and social development of spa tourism has developed into a new tourism theme.Bath Spa to experience the hot spring, hot spring culture theme of perception, leisure, health, holidays for the purpose of tourism activities to flourish.Meanwhile,the hot spring water in agriculture, aquaculture, geothermal power and the life of the people also have a very wide range of applications.Thus, springs water in today's society is playing an increasingly important role.However, the hot springs rich in minerals as a rich source of highly mineralized water,containing many of the beneficial and some toxic trace elements.So far, the hot spring water hazards and toxic elements in the mechanism of the literature few reports, particularly on the basis of data on the work of hot too.This paper selects the common sulfur hot spring water as the research object, the establishment of a rapid and simple method for speciation analysis of sulfur, sulfur hot spring water system of the existence of the relationships between morphology and using VB programming language, drawing the water the theory of various forms of sulfur Potential-pH diagram.Both pH and temperature as the main factors affecting the changes in the sulfur hot spring water relations and the law of conversion.This established a rapid and continuous determination of sulfur hot spring water ion, sulfite, thiosulfate morphological analysis.Wide linear range of the method of work, in the concentration range of 0²50μg/mL linear relationship between the molar extinction coefficientεwas 11.62×10⁴,5.36×10⁴,3.18×10⁴L·mol^-1·cm^-1.The average recovery was 97.7^-102.8%, respectively.The method is sensitive, accurate, fastand easy to operate.The initial potential-pH diagram are calculated based on chemical reaction then drawn by hand, but with further research, to be expanded to include the contents of the expression of ligand and high temperature conditions of the complex system, considered More and more chemical reactions and conditions,the calculation of chemical equilibrium in the increasingly complex and cumbersome, complex system with hand-drawn potential-pH diagram is also increasingly difficult.Based on the Eh-pH diagram drawing needs, through the Visual Basic 6.0 development kit to achieve the preparation of a drawing program, with a workload of small, fast, also the visual characteristics.Draw a hot spring water at room temperature (25℃) of various forms of sulfur potential-pH diagram.Through various forms of sulfur in the theory of potential-pH diagram, you can clearly see the advantages of various forms of sulfur region and affect the adjacent form transformation factors.For the next experiment provides an accurate guide.From the potential-pH diagram can be seen, the acidity of the various forms of sulfur hot spring water has an important influence.Change the system pH, sulfur content in various forms quite different.Thiosulfate, sulfate content with the system with changes in pH is not very obvious.Sulfite pH change occurred with the system, significantly increasing trend.S0 sulfur content changes with the system, there is a greater acidity changes.That is, in neutral and acidic environments, sulfur showed increasing trend,In the alkaline environment present a decreasing trend.-2 With the acidity of the sulfur content of price differences there is a greater change in the pH<5.5 when the system was significantly lower than the sulfur ion system of the normal acidic conditions, because the gaseous H₂S in the water-air interface is easy to Plaza scattered into the air.H₂S content in water resulting in the occurrence of significantly lower, which is why spring water with a rotten-egg smell is usually the reason.In the 5.5<pH<8.5 relative to a neutral environment, the sulfur ion content increased, indicating that the system into other forms of sulfur generated S^2-.In the pH>9.0, the sulfur content of ions showing a first and then decreased in the phenomenon, which may be due to sulfur ions in the presence of different pH form of reasons for the discrepancy.The morphology of temperature on the hot water between the conversion of sulfur is not very clear, and various forms of content in a certain range of fluctuation.Hot water, hydrogen sulfide is highly toxic substances, on the surrounding environment,safety and equipment life,resulting in varying degrees of harm.Therefore, hot water containing H₂S desulfurization treatment have greater social and economic benefits.Based on the chemical properties of sulfide were added oxidants and metal ions by precipitation agent for the removal of sulfur compounds, and achieved good results,However, the hot water is not suitable for the removal of sulfide.Potential under both sulfur-pH diagram theory, -2 in the price of sulfur pH<7.09 when 7.09<pH<12.95 the all H₂S in hot water Conversion into HS-,pH>12.95 is generated the S^2-.Therefore we have hot water by adjusting the pH to change the system, the content of H₂S, to reduce and eliminate the purpose of the hot water H₂S.