南方某化工厂污染修复研究

发布时间：2018-11-23 11:48

【摘要】：土壤和地下水为人类活动提供着最基本的必需品,人类的一切活动都离不开土壤和水。随着现代社会的进步,人口大量的增长、工农业的快速发展给土壤和地下水带来了严重的污染。本文以江南某化工厂废弃场地为例,通过地质勘查、土壤钻孔、抽水试验、注水试验以及后期收集到的数据分析了该场地污染的初步情况。运用基于地统计学的EVS软件分析了该场地土壤污染物的空间含量和空间结构特征,通过EVS软件的3D可视化功能,以多视角、多层次展现了土壤中氯苯、氯仿、四氯化碳的分布特征。结果显示该化工厂遗留厂地内氯苯和氯仿的污染较为严重,四氯化碳的污染较轻,污染范围主要集中在污水处理池和第二农药生产车间区域,经推测该区域的污染很有可能是在农药生产过程中原材料泄漏造成的。根据EVS的模拟结果,氯苯在土壤底层的迁移现象最为明显。依据收集到的水文地质资料建立该场地水文地质概念模型,利用GMS软件中的MODFLOW、MT3D模块模拟了研究区域内地下水中的苯在泄漏365天、730天、1095天、1460天、1825天后的扩散趋势。采用单井和双井抽提处理系统模拟了地下水中苯在不同单井抽出量下的修复情况,并基于加权系数法分析了不同修复方案的优劣。
[Abstract]:Soil and groundwater provide basic necessities for human activities, all human activities are inseparable from soil and water. With the progress of modern society and the increase of population, the rapid development of industry and agriculture has brought serious pollution to soil and groundwater. Taking the abandoned site of a chemical plant in the south of the Yangtze River as an example, the preliminary situation of the site pollution is analyzed through geological exploration, soil drilling, pumping test, water injection test and the data collected in the later period. The spatial content and spatial structure characteristics of soil pollutants in the site were analyzed by EVS software based on geostatistics. Through the 3D visualization function of EVS software, chlorobenzenes and chloroform in soil were displayed from multi-visual angle and multi-level. Distribution of carbon tetrachloride. The results showed that the pollution of chlorobenzene and chloroform in the site of the factory was serious, the pollution of carbon tetrachloride was relatively light, and the range of pollution was mainly concentrated in the sewage treatment pond and the second pesticide production workshop. It is speculated that the pollution in this area is probably caused by leakage of raw materials during pesticide production. According to EVS simulation results, the migration of chlorobenzene in the soil bottom is the most obvious. Based on the hydrogeological data collected, the hydrogeological conceptual model of the site was established, and the diffusion trend of benzene in groundwater in the study area was simulated by using MODFLOW,MT3D module of GMS software after 365 days, 730 days, 1095 days, 1460 days and 1825 days. The remediation of benzene in groundwater under different single well extractions was simulated by single well and double well extraction systems, and the advantages and disadvantages of different remediation schemes were analyzed based on the weighting coefficient method.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X53;X523;X78

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