承压含水层中反应性溶质运移实验与模拟研究——以苯胺和1,2-萘醌-4-磺酸钠为例  

Experimental and Simulating Study of Reactive Solute Transport in a Confined Aquifer: A Case of 1,2-naphthoquinone-4-sulfonic Acid and Aniline

作　　者：钱家忠[1] 吴亚楠[1] 王沐[1] 刘咏[2] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]合肥工业大学生物与食品工程学院,安徽合肥230009

出　　处：《皖西学院学报》2013年第5期88-92,共5页Journal of West Anhui University

基　　金：国家自然科学基金(41372245;41272251);合肥工业大学创新群体计划项目(2009HGCX0233)

摘　　要：反应性溶质运移机理和模拟是地下水污染防治的前提和基础。为了考察化学反应和水流条件对溶质运移的影响,本文设计了承压含水层物理模型,以苯胺和1,2-萘醌-4-磺酸钠化学反应为例,开展了双分子化学反应条件下不同流速溶质运移实验和模拟研究,得到主要结论如下:(1)利用变系数二级反应率改进的ADRE模型能够较好地模拟在3种不同流速下双分子反应性溶质运移行为,峰值浓度相对误差分别为4.5%、5.0%及10.1%,模型可行,且模拟精度较高。(2)随着流速增大,模型参数m减小,而β0则增大。(3)模型对参数m值变化最敏感,其次是β0值,较不敏感的是弥散系数D。(4)随着流速增大,反应物和产物穿透曲线的不规则性加强,存在较明显的"拖尾"现象,今后需要进行机理方面的研究。The mechanism and simulation of reactive solute transport are premise and basis for groundwater pollution prevented and cured. To study the solute transport affected by chemical reaction and flow rates, we design a physical model standing for a confined aquifer, keep the properties of porous media unchanged, and take a case study of bimolecular reactive transport using aniline and 1,2-naphthoquinone-4-sulfonic acid. Batch experiments and numerical simulations are conducted under different flow conditions, respectively. Main conclusions are drawn as follows： （1） The ADRE model revised by a variable two-order reaction rate can capture well the behavior of bimolecular reactive transport in different flow rates, respectively. The relative errors of peak product concentration simulated vs. measured are 4. 5%, 5.0% and 10. 1%, respectively. The model is feasible with higher accuracy; （2） With increasing of flow velocities, the values of m decrease, and the values of β0 increase; （3） The model sensitivity to parameter ＂m＂ is the largest, the second is ＂β0＂, the parameter ＂D＂ is slightly sensitive; （4） With the flow velocity increasing, the breakthrough curves of reactants and products become more irregular, and there are some obvious ＂long tail＂ in the curve. Further mechanism study is needed.

关 键 词：反应性溶质运移 实验 数值模拟 苯胺 1 2-萘醌-4-磺酸钠 

分 类 号：P641[天文地球—地质矿产勘探]