Experimental Study on the Dissolution Kinetics of Basalt-Water Interaction
玄武岩—水相互作用的溶解机理研究

The results of water-rock interaction experiment by immersing basalt specimen of certain particle size into water with diverse acidity under room T-P sealed conditions with is atmospheric disturbance show that after a certain time the concerntration of major elements in solution turns into equilibrium, and the acidity of the solution tends to become neutral regardless of whether the original solution is acid or basic during basalt-water interaction. We call this phenomenon "pH neutralized effect". The dissolved species in the solution were determined and the chemical components of unreacted and reacted sample-surface were analyzed using X-ray photoelectron spectroscopy (XPS). The results revealed two different mechamisms of dissolution of basalt in acidic and basic solutions.