| 托素湖湖水蒸发过程中析盐及其pH值的变化规律研究 |
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| 引用本文： | 张棣,马云麒,李兴意,杨剑,彭章旷,刘玉秀,马学海.托素湖湖水蒸发过程中析盐及其pH值的变化规律研究[J].盐湖研究,2022,30(1):46-56. |
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| 作者姓名： | 张棣 马云麒 李兴意 杨剑 彭章旷 刘玉秀 马学海 |
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| 作者单位： | 中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海 西宁 810008;青海省盐湖地质与环境重点实验室,青海 西宁 810008;中国科学院大学,北京 100049;中国地质大学,北京 100083 |
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| 摘 要： | 盐湖卤水蒸发是提取盐湖有益成分的主要途径之一,当前盐湖卤水的蒸发实验主要集中在矿化程度较高的盐湖和咸水湖中,蒸出矿物以硫酸盐和氯化物为主.为了获得湖水蒸发过程中从低矿化度到高矿化度全阶段的析盐和pH值变化规律,用托素湖微咸水在恒温室内开展28±2℃蒸发实验.托素湖为硫酸镁亚型微咸水湖(矿化度27.8 g/L),整个蒸发...
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| 关 键 词： | 托素湖 微咸水湖 蒸发实验 pH值 |
| 收稿时间： | 2020/5/21 0:00:00 |
| 修稿时间： | 2020/6/16 0:00:00 |
Regularity of Salt Separation and the Variation of pH Values in the Process of Evaporation in Tuosu Lake Water |
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| ZHANG Di,MA Yun-qi,LI Xing-yi,YANG Jian,PENG Zhang-kuang,LIU Yu-xiu,MA Xue-hai.Regularity of Salt Separation and the Variation of pH Values in the Process of Evaporation in Tuosu Lake Water[J].Journal of Salt Lake Research,2022,30(1):46-56. |
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| Authors: | ZHANG Di MA Yun-qi LI Xing-yi YANG Jian PENG Zhang-kuang LIU Yu-xiu MA Xue-hai |
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| Institution: | (Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lake,Xining,810008,China;University of Chinese Academy of Sciences,Beijing,100049,China;.China University of Geosciences,Beijing,100083,China) |
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| Abstract: | Evaporation of salt lake brine is one of the main approaches to extract salt lake resources.At present, evaporation experiments of salt lake brine are mainly focused on salt lake and saline lake with high salinities.In order to obtain the salt evolution and pH value change rule from low to high salinity in the whole process of lake evaporation, this paper carried out evaporation experiment of 28 ± 2℃ in a thermostatic chamber with the brackish water of Tuosu lake.Tuosu lake was a brackish lake of magnesium sulfate subtype(salinity 27.8 g/L).During the whole evaporation process, the pH values were reduced from 8.92 to 6.108 continuously.The sequence of mineral precipitation is nesquehonite-aragonite-halite-hexahydrite-bloedite-pentahydrite-starkeyite, and there are seven sets of salt precipitation sequence.The variation of the pH values of brine is mainly controlled by the change of the mineral phase.In the course of carbonate precipitation, the pH values decrease from 8.529 to 7.205 steeply, and then the pH value decreases to 6.887 at the precipitation stage of halite-sulfate salts, which is dominated by halite.Later, the pH value smoothly decreases to 6.29 at the stage of sulfate-halite salts dominated by bloedite.Meanwhile the reason why the minerals such as gypsum, mirabilite and epsomite were not precipitated was analyzed.According to the evaporation experiment of Tuosu lake, we can comprehend the mineral precipitation regularity and the variation of physical and chemical properties of salt lake more comprehensively. |
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| Keywords: | Tuosu lake Brackish water lake Evaporation experiment pH value |
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