地下水-土系统中PAHs复合污染吸附/解吸机理研究进展

地下水-土系统中多环芳烃类(Polycyclic Aromatic Hydrocarbons,PAHs)污染是目前研究的热点问题之一,研究焦点正逐步由单一污染向复合污染转变,而在地下水-土系统中PAHs复合污染的吸附/解吸机理是其调查与修复研究的关键问题。结合目前国内外研究进展,对重金属、非金属类物质与PAHs复合污染时竞争性吸附/解吸机理、热力学特征和影响因素等方面的研究进行评述,认为今后的研究方向是PAHs与复合污染物间交互作用的定量分析,分子水平竞争性吸附/解吸机理研究,生物吸附、化学吸附与PAHs生物毒性影响关系研究等方面,随着上述工作的逐渐深入,必将推进地下水-土系统中复合污染的研究进程。

Research Progress of Adsorption/Desorption Mechanism of PAHs Combined Pollution in Groundwater-Soil System

The pollution of Polycyclic Aromatic Hydrocarbons (PAHs)in groundwater-soil system is one of the hot issues studied currently.The research focus is changing from single pollution to combined pollution,while the ad-sorption/desorption mechanism of combined pollution of PAHS is the key problem of investigation and remediation study in groundwater.In combination with present foreign and domestic research progress,this paper reviews the researches on the competitive adsorption/desorption mechanism,thermodynamic characteristics and influence factors of the combined pollution of heavy metals,nonmetal and PAHs.The paper confirms that the research directions in the future include quantitative analysis of interaction of combined pollutants,the competitive adsorption/desorption mechanism research in the molecular level,and the influence study of PAHs biological/chemical adsorption on the biological toxicity.Further study on the above aspects will impel the research process of combined pollution in groundwater-soil system.