化工类企业典型泄漏源不同泄漏情景下污染物的扩散预测初步分析
Preliminary Analysis of Pollutant Diffusion Prediction Under Different Leakage Scenarios of Typical Leakage Sources in Chemical Enterprises
徐从海 1王雪 2徐小艳2
作者信息
- 1. 临沂君和环保科技有限公司,山东临沂 276000
- 2. 山东君成环境检测有限公司,山东临沂 276000
- 折叠
摘要
化工类企业产生的污染物地下水环境污染问题因其影响严重受到人们的广泛关注.针对建设项目对地下水水文地质条件进行勘查,并对污水处理站防渗措施失效等原因可能出现渗漏等问题,而影响地下水环境.针对该污染源,设定短期和长期泄漏两种情景进行预测,分析氨氮和COD的迁移距离.经调查和分析发现,该塑料颗粒生产项目所在区域地下水自上而下可划分为松散岩类孔隙水和碳酸盐岩类裂隙岩溶水;深入分析了短期和长期两种情景进行预测.短期预测选择一维稳定流一维水动力弥散预测模型,分析得到短期泄漏情景下,污染因子在含水层中沿着地下水流向东南方向运移,随时间和运移距离的增加,含水层中的污染物浓度呈逐渐下降的趋势.当渗漏时间为100 d时,距离污染源51 m以内局部区域受到污染;当渗漏时间超过1 000 d后,预测浓度最大值出现在最大值距离为93 m.均未超过地下水质量Ⅲ类标准;长期泄漏情景,则考虑采用一维稳定流一维水动力弥散预测模型预测,发现氨氮和COD均表现出影响范围随着时间的延长而扩大.当到1 000 d最大影响范围为283 m,COD则为229 m.
Abstract
Groundwater environmental pollution caused by chemical enterprises has been widely concerned by people because of its serious impact.According to the construction project,the hydrogeological conditions of the groundwater are investigated,and seepage problems may occur due to the failure of the anti-seepage measures of the sewage treatment station,which will affect the groundwater environment.Short-term and long-term leakage scenarios are set to predict the pollution source,and the migration distance of ammonia nitrogen and COD is analyzed.Through investigation and analysis,it is found that the groundwater in the plastic particle production project area can be divided into loose rock pore water and carbonate rock fissure karst water from top to bottom.Both short-term and long-term scenarios are analyzed in depth.The one-dimensional steady flow and one-dimensional hydrodynamic dispersion prediction model is selected for short-term prediction.It is analyzed that under the short-term leakage scenario,pollution factors migrate in the aquifer along the groundwater to the southeast direction.With the increase of time and migration distance,the concentration of pollutants in the aquifer shows a trend of gradual decline.When the leakage time is 100 days,the local area within 51 m from the pollution source is polluted.When the leakage time exceeds 1 000 days,the predicted maximum concentration occurs at a maximum distance of 93 m.None of them exceeded the Class Ⅲ standard of groundwater quality.In the long-term leakage scenario,one-dimensional steady flow one-dimensional hydrodynamic dispersion prediction model is used to predict the leakage.It is found that the influence range of ammonia nitrogen and COD expands with the extension of time.When the maximum influence range is 283 m at 1 000 d,the COD is 229 m.
关键词
地下水环境/影响分析/泄漏Key words
groundwater environment/impact analysis/leak引用本文复制引用
基金项目
山东省科技型中小企业创新能力提升项目(2023TSGC047)
出版年
2024
NETL
NSTL
万方数据