石化污染场地地下水修复治理挑战与对策

实现污染场地安全高效修复是石化行业发展急需探讨和解决的关键问题.从特征污染物特点、水文地质条件、修复环境效应3个方面分析石化污染场地修复面临的挑战,预测未来石化污染场地地下水修复技术,并提出按照污染程度进行分区修复治理的对策.分析表明,石化污染场地中非水相污染物(NAPL)的疏水性、复合污染物的迁移特征差异、地层的非均...

CHALLENGES AND COUNTERMEASURES OF GROUNDWATER REMEDIATION AND TREATMENT IN PETROCHEMICAL CONTAMINATED SITES

Groundwater contamination in petrochemical sites seriously restricts ecological civilization construction.Safe and efficient remediation of contaminated sites is a key problem to be discussed and solved urgently in the development of petrochemical industry.The challenges for groundwater remediation in petrochemical contaminated sites are analyzed from three aspects:particular contaminants,hydrogeology conditions and environmental effects.The promising groundwater remediation techniques including regional remediation strategies regarding to different pollution levels are discussed.As revealed by the analysis,the difficulties for accurate pollution positioning and in situ remediation in petrochemical contaminated sites have been increased due to the hydrophobicity of non-aqueous phase pollutants(NAPLs),different migration characteristics of compound pollutants,the heterogeneity of strata,as well as the frequent interactions between surface water and groundwater.Major breakthroughs of groundwater remediation technology in future petrochemical sites include the development of sustained-release and long-acting materials with improved mass transfer and transmission performance and of high efficiency remediation technologies for heterogeneous aquifers.The remediation effects can be significantly improved by combining subregional remediation and in situ multi-remediation technologies,which further ensures the safe production of petrochemical sites.