垃圾渗滤液在土壤中的运移规律研究
发布时间：2018-11-19 18:59
【摘要】：本论文以土柱实验为主,结合理论分析,研究垃圾渗滤液在土壤及地下水中的迁移转化规律,并应用Hydrus-1d软件进行仿真模拟,实验过程中的用土均取自郊外的天然土样,并测定所选土样的基本物理性质,如容重、含水率及粒径组成等。首先进行氯离子的示踪实验,以测定一维水动力学弥散系数,示踪实验结束后对用提前制备的垃圾渗滤液进行淋滤实验,对淋出液中的主要污染组分中的有机污染物(CODcr)、氨氮、pH值等进行了测定,并应用Hydrus-1d软件模拟垃圾渗滤液在土柱中的运移过程,将Hydrus-1d软件所模拟的结果与实验室所测的数据进行对比分析发现,Hydrus-1d软件的模拟结果在趋势上与实验室实测值有良好的一致性,不考虑垃圾渗滤液在土柱中的微生物作用,Hydrus-1d在理论上可以很好的拟合垃圾渗滤液在土壤中的运移规律;此外,通过对进水压力水头和弥散系数进行敏感性分析,发现改变进水压力水头对土柱底部淋出液的浓度影响要大于垂向弥散系数对土柱底部淋出液的浓度影响,进水压力和垂向弥散度越小,土壤对溶质的吸附强度越弱,所得曲线越陡。本论文的研究为垃圾场土壤的污染控制和修复、地下水资源污染控制、管理和评价以及垃圾渗滤液处理工艺的合理选择提供理论依据和技术支持。
[Abstract]:Based on the soil column experiment and theoretical analysis, this paper studies the migration and transformation of landfill leachate in soil and groundwater, and simulates it by using Hydrus-1d software. The soil used in the experiment is taken from the natural soil samples from the countryside. The basic physical properties, such as bulk density, moisture content and particle size composition, were determined. First, the tracer experiment of chloride ion was carried out to determine the dispersion coefficient of one-dimensional hydrodynamics. After the tracer experiment, the leaching experiment was carried out with the landfill leachate prepared in advance, and the organic pollutant (CODcr), in the main pollutants in the leachate was tested. The ammonia nitrogen and pH value were measured, and the transport process of landfill leachate in soil column was simulated by Hydrus-1d software. The results of simulation by Hydrus-1d software were compared with the data measured in laboratory. The simulation results of Hydrus-1d software are in good agreement with the measured values in the laboratory. The microorganism function of landfill leachate in soil column is not considered, and Hydrus-1d can fit the migration law of landfill leachate in soil in theory. In addition, through the sensitivity analysis of influent pressure head and dispersion coefficient, it is found that the influence of changing influent pressure head on the concentration of leachate at the bottom of soil column is greater than that of vertical dispersion coefficient on the concentration of leachate at the bottom of soil column. The smaller the influent pressure and the vertical dispersion, the weaker the adsorption intensity of solute and the steeper the curve. The research in this paper provides theoretical basis and technical support for the control and restoration of soil pollution, the pollution control, management and evaluation of groundwater resources and the reasonable selection of landfill leachate treatment process.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X53;X703;X523
本文编号：2343159
[Abstract]:Based on the soil column experiment and theoretical analysis, this paper studies the migration and transformation of landfill leachate in soil and groundwater, and simulates it by using Hydrus-1d software. The soil used in the experiment is taken from the natural soil samples from the countryside. The basic physical properties, such as bulk density, moisture content and particle size composition, were determined. First, the tracer experiment of chloride ion was carried out to determine the dispersion coefficient of one-dimensional hydrodynamics. After the tracer experiment, the leaching experiment was carried out with the landfill leachate prepared in advance, and the organic pollutant (CODcr), in the main pollutants in the leachate was tested. The ammonia nitrogen and pH value were measured, and the transport process of landfill leachate in soil column was simulated by Hydrus-1d software. The results of simulation by Hydrus-1d software were compared with the data measured in laboratory. The simulation results of Hydrus-1d software are in good agreement with the measured values in the laboratory. The microorganism function of landfill leachate in soil column is not considered, and Hydrus-1d can fit the migration law of landfill leachate in soil in theory. In addition, through the sensitivity analysis of influent pressure head and dispersion coefficient, it is found that the influence of changing influent pressure head on the concentration of leachate at the bottom of soil column is greater than that of vertical dispersion coefficient on the concentration of leachate at the bottom of soil column. The smaller the influent pressure and the vertical dispersion, the weaker the adsorption intensity of solute and the steeper the curve. The research in this paper provides theoretical basis and technical support for the control and restoration of soil pollution, the pollution control, management and evaluation of groundwater resources and the reasonable selection of landfill leachate treatment process.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X53;X703;X523
【参考文献】
相关期刊论文 前10条
1 王杰;聂宏林;潘涛;;地下水污染物迁移机制及弥散参数初步估计[J];科技视界;2014年24期
2 孙洪伟;郭英;彭永臻;;垃圾填埋场渗滤液短程生物脱氮的长期稳定性实验研究[J];环境科学;2014年01期
3 杨凤娥;;容量法与分光光度法测定水中的化学需氧量方法比对[J];环境科学导刊;2013年S1期
4 刘增超;董军;何连生;席北斗;孟睿;李一葳;严刚刚;;基于过程模拟的地下水污染风险评价方法研究[J];中国环境科学;2013年06期
5 刘增超;何连生;董军;孟睿;宋博宇;席北斗;;简易垃圾填埋场地下水污染风险评价[J];环境科学研究;2012年07期
6 海龙;梁冰;隋淑梅;;垃圾渗滤液中氨氮在表土层中迁移扩散规律研究[J];水资源与水工程学报;2012年02期
7 王莹莹;秦侠;;垃圾渗滤液运移过程中相关模型的研究及应用现状[J];安全与环境学报;2012年01期
8 王晓军;;垃圾渗滤液在不同介质中迁移转化规律[J];山西建筑;2011年29期
9 宋莹;魏薇;杨静;;硝酸银滴定法测定水中氯化物不确定度的评定[J];现代测量与实验室管理;2011年05期
10 李亮;史海滨;赤江刚夫;张义强;刘宏云;;内蒙古河套灌区耕地与荒地间水盐补排规律的研究[J];灌溉排水学报;2010年05期
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