| 不同环境条件下板岩中必需元素的释放规律 |
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| 引用本文： | 李王成,董亚萍,李晨,王双涛,赵研,王兴.不同环境条件下板岩中必需元素的释放规律[J].排灌机械工程学报,2020,38(9):951-958. |
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| 作者姓名： | 李王成 董亚萍 李晨 王双涛 赵研 王兴 |
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| 作者单位： | 宁夏大学土木与水利工程学院,宁夏 银川750021;宁夏节水灌溉与水资源调控工程技术研究中心,宁夏 银川 750021;旱区现代农业水资源高效利用教育部工程研究中心,宁夏 银川750021;宁夏大学土木与水利工程学院,宁夏 银川750021 |
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| 摘 要： | 利用室内模拟试验研究不同环境条件下板岩必需元素的释放规律,将取自香山地区的灰绿板岩岩样分为蒸馏水干湿循环组(ZLGS)、蒸馏水冻融循环组(ZLDR)和微咸水冻融循环组(WXDR)3组.通过对3组岩样进行50次循环试验,模拟板岩的风化过程.在循环开始前测量板岩基本物理性质并进行SEM微观结构分析;试验过程中定期测量板岩淋溶液电导率EC和淋溶液中必需元素的组成及含量.通过试验研究发现,试验条件下,随着循环次数增加,3种处理的板岩淋溶液EC呈波动增加趋势;3种处理下,必需元素释放种类数排序产生差异,各元素释放量排序以及释放量较大元素种类无差异,必需元素累积释放量按组分排序由大到小为ZLDR,ZLGS,WXDR;必需元素累积释放量与试验循环次数呈对数函数关系.
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| 关 键 词： | 板岩 必需元素 冻融循环 干湿循环 释放规律 |
| 收稿时间： | 2018-10-18 |
Essential element leaching law of slate under different environmental conditions |
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| LI Wangcheng,DONG Yaping,LI Chen,WANG Shuangtao,ZHAO Yan,WANG Xing.Essential element leaching law of slate under different environmental conditions[J].Journal of Drainage and Irrigation Machinery Engineering,2020,38(9):951-958. |
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| Authors: | LI Wangcheng DONG Yaping LI Chen WANG Shuangtao ZHAO Yan WANG Xing |
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| Institution: | 1. School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan, Ningxia 750021, China; 2. Ningxia Water-saving Irrigation and Water Resources Regulation and Control Engineering Technology Research Center, Yinchuan, Ningxia 750021, China; 3. Engineering Research Center for Efficient Utilization of Modern Agricultural Water Resources in Arid Regions, Ministry of Education, Ningxia University, Yinchuan, Ningxia 750021, China |
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| Abstract: | Indoor simulation experiments were conducted to study leaching law of essential element from slate under different environmental conditions. The gray-green slate rock samples taken from Xiangshan area were divided into three groups: distilled water dry-wet cycle group, distilled water freeze-thaw cycle group and brackish water freeze-thaw cycle group. The weathering process of slate was simulated through conducting 50 cycle tests on three groups of the samples. Before a test cycle started, the basic physical property constants of the slate were measured, and its microstructure was analyzed with scanning electron microscopy(SEM). During the test, the electrical conductivity(EC)and the essential element composition and content in leaching solution of the slate were measured regularly. Through experiments it is found that the EC values of the leaching solutions of three groups rise with increasing the number of cycles under the existing experimental conditions. The ranking of the number and the kinds of essential elements leached is different from each other in three groups. However, the ranking and the leached content of each elements and the ranking of the number and the types of essential element with more leached content are not different from one group to another. The ranking of three groups is ZLDR, ZLGS, WXDR from the largest to the least in terms of accumulated leached content of essential elements. The accumulated leached content of essential elements is in a logarithmic relationship with the number of test cycles. |
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| Keywords: | slate essential elements freeze-thaw cycle dry-wet cycle leaching law |
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