土工基础

›› 2018, Vol. 32 ›› Issue (5): 510-513.

• 工程实录 • 上一篇    下一篇

电场作用下钙质砂盐度淡化机制探讨

曹 梦1，紫 民2，殷 娟3,4，陈伟俊3,4，姚锐丹4   

  1. （1.武汉理工大学资源与环境工程学院，武汉 430070；2.91058部队；
    3.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071；4.广西大学土木建筑工程学院，南宁 530004）
  • 收稿日期:2017-08-02 修回日期:2017-09-18 出版日期:2018-10-30 发布日期:2018-11-02
  • 作者简介:曹 梦(1993-)，女，硕士研究生，研究方向为工程地质和地下水动力学。
  • 基金资助:

    国家自然科学基金面上项目（41572304，41372313）

Desalination Process of Calcareous Sand under the Electrical Field

CAO Meng1, ZI Min2, YIN Juan3,4，CHEN Weijun3,4, YAO Ruidan4   

  1. (1.College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, 430070;
    2.China Armed Forces, Unit 91058;　3.State Key Laboratory of Geomechanics and Geotechnical Engineering,
     Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071;
    4.College of Civil Engineering, Guangxi University, Nanning, 530004)
  • Received:2017-08-02 Revised:2017-09-18 Online:2018-10-30 Published:2018-11-02

摘要： 礁砂岛的淡水资源稀缺问题越来越备受关注，降雨是其中来源之一。但降雨等作用形成的淡水透镜体不仅厚度较薄，而且所需年限较长。通过施加外电场力作用，用蒸馏水模拟降雨来研究促进礁砂岛淡化的能力。实验设置三组电压梯度，分别为0.833 V/cm，1.667 V/cm，2.5 V/cm，并设置三组雨强大小，分别为0.0303 ml/min/cm2，0.0455 ml/min/cm2，0.0606 ml/min/cm2。结果表明在电场作用下，礁砂岛盐度的淡化程度比自然状态时高，当电场梯度为1.667 V/cm、雨强为0.0606 ml/min/cm2时，淡化程度最大；阳极区域范围内的淡化能力比阴极区域范围更强；而当电压梯度为2.5 V/cm、雨强为0.0606 ml/min/cm2时，中间点的淡化能力最强。

关键词: 礁砂岛, 电压梯度, 雨强, 淡化程度, 淡化能力

Abstract: The scarcity of freshwater at coral reefs and islands receives more and more attentions. The precipitation on the coral islands and reefs is one of the major freshwater source. The freshwater lenses formed by the natural precipitation is relatively thin and take a long time to recharge.  This paper presents a laboratory study of desalination of seawater under an electrical field. The precipitation process was simulated by the distilled water. Three electrical fields were used in the study; 0.833C/cm, 1.667V/cm and 2.500 V/cm. Three precipitation intensities were also set; .0303ml/min/cm2, 0.0455ml/min/cm2 and 0.0606ml/min/cm2. The results indicate that, under the electrical field, the degree of desalination is higher than that of under the natural conditions. The highest desalination was found under an electrical field of 1.667V/cm and a rainfall intensity of 0.0606 ml/min/cm2. Compared with ears near the cathode, higher degree of desalination was found at areas near anode. When the voltage gradient is 2.5V/cm and the rain intensity is 0.0606ml/min/cm2, the intermediate point has the strongest desalination capacity.

Key words: Coral Reefs and Islands, Voltage Gradient, Intensity of Precipitation, Degree of Desalination, Desalination Capacity