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Distributive Behaviours of the Seawater Chemical Resources in the Gulf of Thailand Using isothermal Evaporation

Distributive Behaviours of the Seawater Chemical Resources i...

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第十六届全国化学热力学和热分析学术会议

作者： Ya-Fei Guo~1,Chen-Xiao Lin~1,Zhi-Gang Zhao~1,Xing-Liang Xu~1, Xiao-Gang Cheng~1,Shi-Qiang Wang~1 and Tian-Long Deng~(1,2) 1 Tianjin Key Laboratory of Marine Resources and Chemistry,College of Marine Sci &Eng,Tianjin University of Science and Technology,Tianjin,300457,P.R.China, 2 ACS Key Laboratory of Salt Lake Resources and Chemistry,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,P.R.China

＜正＞In order to economically exploit seawater chemical resources,it is essential to adequately adopt the local natural resources such as the energy of the wind and sun,i.e.,solar pond *** simulating isothermal evaporation experiment as similar as the climate conditions in the Gulf of Thailand was designed to demonstrate the enrichment behaviours of sodium,potassium, magnesium,calcium and the rare elements including lithium,bromine,rubidium,and caesium in seawater in the Gulf of Thailand. Through this experimental study,a series of liquid- and solid phase samples through evaporating after filtrating were obtained and analyzed to reveal the enriched behaviours of sodium,potassium, magnesium,*** experiment results showed that potassium ion was gradually enriched in the liquid phase in the first stage,and then it was crystallized out in the forms of carnallite and only a few of potassium chloride formed at the late evaporating stage. Meanwhile,the concentrations of lithium ion and bromine ion are measured corresponding to flame atomic absorption spectrophotometer and spectrophotometer to reveal the enrichment behaviors of lithium and bromine in brine during isothermal evaporating *** results of experiment showed that lithium was enriched constantly at the first stage of evaporating,and then significantly up to 18.85 mg/L of lithium in solution;bromine in the liquid phase was enriched as similar as lithium with the highest concentration up to 6.0g/L in the mother *** thesis provides an important reference for the development process of bromine and lithium extraction from the seawater in the Gulf of Thailand. Those results provided a valuable reference for the comprehensive utilization of seawater in the Gulf of Thailand.

关键词： Simulating isothermal evaporating Crystallized path Seawater The Gulf of Thailand

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