Characteristics of Selenium Transport in the Loessal Soil Fitted with Deterministic Equilibrium and Nonequilibrium CDE Models

CONG Wei; ZHANG Xing-chang; FENG Ye

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Characteristics of Selenium Transport in the Loessal Soil Fitted with Deterministic Equilibrium and Nonequilibrium CDE Models

更新时间：2024-11-07

- Characteristics of Selenium Transport in the Loessal Soil Fitted with Deterministic Equilibrium and Nonequilibrium CDE Models
- Vol. 25, Issue 3, (2011)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院,陕西杨凌,7121002. 西北农林科技大学资源环境学院,陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所,陕西杨凌7121003. 西北农林科技大学林学院,陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
  CLC： S153.5
- Published：2011
- 稿件说明：
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CONG Wei, ZHANG Xing-chang, FENG Ye. Characteristics of Selenium Transport in the Loessal Soil Fitted with Deterministic Equilibrium and Nonequilibrium CDE Models[J]. 2011, 25(3).
DOI：

CONG Wei, ZHANG Xing-chang, FENG Ye. Characteristics of Selenium Transport in the Loessal Soil Fitted with Deterministic Equilibrium and Nonequilibrium CDE Models[J]. 2011, 25(3). DOI：

摘要

污染物在土体运移是影响土体和地下水污染的一个重要的因素。为了研究不同因素对亚硒酸根离子在土体中运移的影响

在室内不同实验条件下

采用垂直土柱易混置换法对亚硒酸根离子在黄绵土土柱中的运移进行了研究

获得了不同容重及不同土柱高度条件下亚硒酸根离子的穿透曲线

通过STANMOD软件

应用确定性平衡CDE数学模型和确定性非平衡两区模型对穿透曲线进行拟合

研究结果表明:容重增大

阻滞因子R值减小

弥散系数D值则是先增大后减小;随着土柱高度的增加

弥散系数D值减小

而阻滞因子R变化不大。非平衡两区模型对于亚硒酸根离子运移参数的拟合优于平衡模型。穿透曲线能较好地反映出离子在土壤中运移的参数值

曲线越靠近y轴、初始穿透时间越小则弥散系数D越大;曲线越平缓则R值越大。

Abstract

The transport of pollutants in soil was an important factor in affecting the pollution of the soil and groundwater.The object of this paper was to study the effect of different factors on selenite ion transport in loessial soil.The miscible displacement technique under different experiment conditions was used to obtain the breakthrough curves(BTCs) of selenite ion transport in loessial soil columns.By studio of analytical models(STANMOD) software

the BTCs of selenite ion were fitted with deterministic equil...

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