PTA化工厂污水对地下水污染的风险评价及对策  

Risk assessment and control countermeasures of groundwater pollution caused by PTA chemical plant sewage

作　　者：杨春晓[1] 刘长礼[1] 王翠玲[1] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050803

出　　处：《南水北调与水利科技》2015年第3期439-443,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：国家科技支撑计划课题"城市发展中的地质环境风险评估与防控关键技术研究与示范"(2012BAJ11B04);中国地质调查局地质调查项目"中原城市群城市地质环境地质调查"(12120113004600)

摘　　要：通过对洛阳市某PTA化工厂进行工程勘察和吸附实验、生物降解实验、土柱淋滤实验求取了包气带物质运移的相关参数,利用Hydrus-1D软件对CODCr在蓄水池下包气带中的迁移进行了模拟预测。结果显示,不采取防渗措施时,正常工况、非正常工况、一般事故和风险事故4种工况下,CODCr从蓄水池底部超标迁移至潜水所需要的时间分别为5.4a、5a、4.9a、3.8a,该污水蓄水池污染当地地下水风险很高;若在蓄水池下铺设2.5m厚的黏性土垫层,则四种工况下CODCr从蓄水池底部超标迁移至潜水所需要的时间分别为12.2a、10.5a、9.1a、6.8a。Engineering investigation and a series of experiments, including the static adsorption,biodegradation, and dynamic soil column leaching experiments, were conducted at a PTA chemical plant in Luoyang to determine the solute transport parameters in the vadose zone. The migration of CODcr in the vadose zone of the sewage reservoir was simulated using Hydrus-lD. The results showed that （1） it takes 5. 4,5,4. 9,and 3. 8 years for CODc, to migrate from the reservoir bottom to water table under the normal, abnormal, ordinary accident, and risk accident conditions respectively without any anti-seepage measures, and the groundwater pollution risk caused by the sewage reservoir is high;and （2） it takes 12.2,10. 5,9. 1,and 6.8 years for CODer to migrate from the reservoir bottom to water table under the normal, abnormal, ordinary accident, and risk accident conditions respectively if there is a 2.5-m thick clay layer under the sewage reservoir.

关 键 词：包气带 地下水 数值模拟 风险评价 

分 类 号：P641[天文地球—地质矿产勘探] X824[天文地球—地质学]