污染场地有机污染物迁移转化规律及其含水层系统天然净化能力研究
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摘要
本文在充分收集研究区河北保定某石油渗漏场地地质、水文等资料的基础上,首先建立水流概念模型和数学模型,然后利用地下水模拟系统软件(GMS)对研究区的23-26m的地下水含水层进行了数值模拟。经过模型的识别与验证计算误差范围都在国家容许范围内,证明水流模型的稳定可靠,所预测的流场能够较为真实的反应天然流场的情况。在所建立的模型中将含水层参数分为9个分区,采用将抽水试验的前后两段时间分别作为模型的识别与验证,经过调参后得到了较好的效果,能够较好的反映研究区地下水系统运动特征。
在地下水流模型的基础上利用弥散试验建立地下水氯离子水质模型,运用MT3D模块对水质模型求解,通过对比氯离子浓度分布的实测值与计算值,对所建立的水质模型进行验证,对应确定研究区内9个分区的弥散度。
在水质模型的基础上分两种情况对研究区存在的主要有机污染物BETX迁移转化进行模拟,首先是在对流-弥散原理下的污染物模拟预测,其次是不只考虑对流弥散作用,同时也考虑生物降解、化学反应作用下的污染物迁移转化的模拟,对比两种情况下的模拟结果,发现研究区内生物降解作用对于有机物的降解起着很好的作用,从而可以认为采用原位生物修复技术对有机污染区域进行治理在此区域内可行。
On the basis of full collection of datas of Geology and hydrology of a oil leakage field in Baoding of Hebei province, firstly, this article established of the concept, and mathematical model flow, hen simulated the groundwater between 23 to 26m of the area's aquifer by Groundwater Modeling System Software(Groundwater Modeling System Software).Finally, the model identification and verification of calculation error range were all allowed in the national context, and this proved the flow model was stable and reliable, and the the flow field that predict could be a more realistic response to the situation of the natural flow field. The model was divided into nine areas based on the aquifer parameters, and the time before and after the pumping test were used as identification and authentication. After adjusting for the participation we obtained the preferable result, and this could better reflect the characteristics of movement of groundwater system.
On the basis of Groundwater flow model we use of chloride ion diffusion test to establish groundwater quality model, and use MT3D to get the Solution of the Water quality model, By comparing the measured and calculated values of the distribution of chloride concentration, we can validate the established water quality model, at last, we can determine the dispersion degree of partition 9 in the study area.
Based on the water quality model we divided into two situations to simulate the main organic pollutants BETX in the study area. Firstly, in the convection dispersion of pollutants under the principles of simulation and prediction, secondly, not only to consider the role of convective dispersion, taking into account biological degradation, chemical reaction of migration and transformation of pollutants under simulated. Comparison of simulation results of both cases and found that biodegradation of the study area for the degradation of organic matter plays a good role, so that the use of in situ bioremediation technology for treatment of organic pollution in the region viable in this area is feasible.
在地下水流模型的基础上利用弥散试验建立地下水氯离子水质模型,运用MT3D模块对水质模型求解,通过对比氯离子浓度分布的实测值与计算值,对所建立的水质模型进行验证,对应确定研究区内9个分区的弥散度。
在水质模型的基础上分两种情况对研究区存在的主要有机污染物BETX迁移转化进行模拟,首先是在对流-弥散原理下的污染物模拟预测,其次是不只考虑对流弥散作用,同时也考虑生物降解、化学反应作用下的污染物迁移转化的模拟,对比两种情况下的模拟结果,发现研究区内生物降解作用对于有机物的降解起着很好的作用,从而可以认为采用原位生物修复技术对有机污染区域进行治理在此区域内可行。
On the basis of full collection of datas of Geology and hydrology of a oil leakage field in Baoding of Hebei province, firstly, this article established of the concept, and mathematical model flow, hen simulated the groundwater between 23 to 26m of the area's aquifer by Groundwater Modeling System Software(Groundwater Modeling System Software).Finally, the model identification and verification of calculation error range were all allowed in the national context, and this proved the flow model was stable and reliable, and the the flow field that predict could be a more realistic response to the situation of the natural flow field. The model was divided into nine areas based on the aquifer parameters, and the time before and after the pumping test were used as identification and authentication. After adjusting for the participation we obtained the preferable result, and this could better reflect the characteristics of movement of groundwater system.
On the basis of Groundwater flow model we use of chloride ion diffusion test to establish groundwater quality model, and use MT3D to get the Solution of the Water quality model, By comparing the measured and calculated values of the distribution of chloride concentration, we can validate the established water quality model, at last, we can determine the dispersion degree of partition 9 in the study area.
Based on the water quality model we divided into two situations to simulate the main organic pollutants BETX in the study area. Firstly, in the convection dispersion of pollutants under the principles of simulation and prediction, secondly, not only to consider the role of convective dispersion, taking into account biological degradation, chemical reaction of migration and transformation of pollutants under simulated. Comparison of simulation results of both cases and found that biodegradation of the study area for the degradation of organic matter plays a good role, so that the use of in situ bioremediation technology for treatment of organic pollution in the region viable in this area is feasible.
引文
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