Effect of pressure on sulfate ion association and ultrasonic absorption in sea water |
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| Affiliation: | 1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, PR China;2. Engineering Research Center of Seawater Utilization Technology of Ministry of Education, Tianjin 300130, PR China;3. National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin 300130, PR China;4. Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300130, PR China |
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| Abstract: | Recent studies on sea water indicated that an increase in pressure of 1000 atm produces a small increase in the concentration of MgSO4 ion-pairs; this is opposite to the effect observed in aqueous solutions of MgSO4 alone. This increase has been assumed to imply a corresponding increase with pressure of ultrasonic absorption due to MgSO4 in sea water, in contrast to the large decrease observed in aqueous solutions. A detailed calculation based on the Eigen and Tamm multistate dissociation model shows, however, that a decrease in ultrasonic absorption with pressure still occurs even though the concentration of ion-pairs increases |
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