摘要
重非水相有机污染物(DNAPLs)泄漏到地下后,在地下介质中与水、气相互作用,构成多相流系统,其运移和分布受多种因素控制.综述性探讨了DNAPLs物理化学性质、泄漏速率、持留特征、介质的非均质性及地下水流速对其在多孔介质中的运移和分布特征的影响.针对以往研究仅从单因素角度分析对DNAPLs运移的影响,着重探讨了地下水流速和介质非均质性双重因素的综合影响.根据现有工作的不足,指出今后需要进一步探讨的研究方向.
There are many factors governing the migration of dense non-aqueous phase liquids（DNAPLs）in the subsurface because of the simultaneous flow of immiscible phases in a multiphase system including DNAPLs,water and air after the leakage of DNAPLs.These factors that affect the complex DNAPLs＇ behavior are summarized from the aspects of physicochemical properties,leakage rate,retention characteristics and heterogeneity as well as groundwater flow velocity.Previous works have mainly focused on only one influencing factor,the combined factors,especially both groundwater flow velocity and heterogeneity on the migration of DNAPLs are further discussed.According to the deficiency of existing work,some issues needed to be further approached are presented.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第3期409-420,共12页
Journal of Nanjing University（Natural Science）
基金
国家自然科学基金(41030746,41172206)
