Experimental Study On Formation Mechanism Of Mineral Water In Jingyu County

Changbai Mountain basalt area is the world’s third largest natural drinking mineral water origin following the Alps, the Caucasus Mountains,domestic and international is rare concentrated area of natural minera water is rare, It has the characteristics of large distribution area, large flow, stable and excellent water quality, great potential for the development of mineral water. It is important to study the formation mechanism and the law of occurrence of mineral water and to develop and protect the mineral water resources.Sampling was carried out during six different periods. 159 samples of mineral water, 15 soil samples and 44 rock samples were analyzed. The sampling periods were over a year, which covers low and high water periods in order to make the samplings typical. The source of the basalt material components, Immersion tests in ultra-pure water with different forms of basalt, soil and volcanic slag for 19 samples are analyzed. Analysis of the forming process of the partial silicate mineral water, the experiments of Soil column leaching and the effects on run off took with 36 samplings; Analysis of the temperature, pressure and environment influence on the formation of the mineral water, the experiments of high temperature high pressure reactor and the effect of temperature, CO₂ and pH with 35 samples.The spatial and temporal distribution law and its influencing factors of the characteristic component of mineral water in the study area are determined.（1） Seasonal variations have no effect on the type of water chemistry and little effect on spatial variability. Major water chemical components in mineral water are basically the same trend. The spatial distribution of chemical components in mineral water is related to water-rock interaction in this area. The content of different ions shows different characteristics and rules in different areas.（2） The chemical compositions in groundwater are affected by many factors in which the composition and content of rock is the dominant factor. The water-rock interaction process and the external influence factors determine the spatial migration and content of chemical compositions.The material sources, forming process and influencing factors of mineral water are determined through the analysis of the experimental data, and the formation mechanism of mineral water in Jingyu is analyzed.（1） Confirm the release rate and variation of mineral components, silicate basalt in different forms, soil and volcano cinder is chosen to be the samples immerse in ultra-pure water. The experimental results show that the releasing process of metasilicate in different samples is different too. The pH value is weak alkaline in solution, the variation trend is with better correlation in samples with shape and fresh surface. The pH value is up to 8.25 in solution of slag. The total amount of partial silicate is generally in increasing trend. But the increasing rate is less.（2） Confirm the formation process of the partial silicate in mineral water, and to design the reaction path of the groundwater and soil, the volcanic slag and the Xuan Wuyan effect in different reaction paths.Experimental results show that the basalts and volcanic slag under different leaching rate, both of pH value in leachate and metasilicate release consistent with the time trend similar, pH is changed from alkaline to neutral, with the increase of flow velocity, the release of silicic acid decrease rapidly. concentration of partial acid changed most is in their contact, In the early stage the release amount of silicic acid in humus is most, in the medium term the release amount of silicic acid in slag is most, in late the release amount of silicic acid in basalt is most, in middle volcanic slag release amount increased, in late basalt release, three presents the progressive relationship in soil column leaching experiment, it reveals the three indexes all advanced change. The release rate and the release rate of the volcanic slag are larger than those of the basalt. Reaction path simulation experiment in water tank results show that the value of pH increased with weak alkaline, and the release of the partial silicate increase slowly.（3） Confirm the influence factors and the related degree of the external environment in the formation of the partial silicate mineral water, and to design the experiment of water rock interaction. The experimental results show that the greater the rock mass, the greater the amount of the release of the silica, the greater the contact area, the greater the amount of release; the temperature and pressure has a promoting effect on the water rock, and the reaction rate is increased.water presents weak alkalinity. The higher the temperature, the greater the cumulative release of basalt, the growth rate of the vesicular basalt is slightly larger. The effect experiment of CO₂ gas shows that silicic acid release maintains an increasing trend in the acidic environment of the water. It shows that the pH value tends to be neutral both in alkaline and acidic conditions. And the release of silicic acid increased at first and then keeps stable. The release rate and total amount in acidic conditions is greater than in alkaline conditions. The release of silicate in acidic conditions release at a maximum value at first and then tends to be stable. But the maximum value occurs in the mid step in alkaline conditions.According to the experimental results that the material source of the partial silicate mineral water in the study area is the study area. Using PHREEQC software and the water rock mass transfer model to calculate the major silicate minerals in the evolution of the hydrological process of chemical reactions, quantitative study of the formation and evolution of mineral water. The Stanford kinetic 1st-order rate model is applied to simulate the water–rock interaction under different rock samples, carbon dioxide injection and pH conditions. Hydrolysis reaction of silicic acid release amount of consistent. The Stumm model was applied to establish the partial silicate release kinetics of silicate minerals at different temperatures in order to conform to the first order kinetic equation. The release law of partial acid is the same with hydrolyzing reaction. temperature, pressure and CO₂ gas factors were positively correlated with the release of the partial silicate. From the experimental point of view, the formation mechanism of mineral water is studied. The conclusion is that it has important theoretical and practical significance for rational development and utilization of mineral water resources.