重金属对药物和个人护理品在土壤/沉积物中吸附的影响机制:现状与展望

The effects mechanism of heavy metals on the adsorption of PPCPs in soils/sediments: Status and prospects

药物和个人护理品简称(PPCPs)是一类具有潜在累积效果的环境污染物,其广泛分布于水体与土壤环境中.在土壤/沉积物中,PPCPs将发生一系列的物理、化学和生物作用,其中吸附是PPCPs在土壤/沉积物中极为关键的环境行为,将影响PPCPs在环境中的迁移转化及其对生物体的危害程度.重金属作为一类常见的无机污染物,它们的存在会影响PPCPs在土壤/沉积物表面的吸附行为,对土壤/沉积物吸附PPCPs的吸附效果造成不同影响.本文归纳总结了重金属存在时,PPCPs在土壤/沉积物中的吸附机理,综合探讨了PPCPs官能团组成、重金属离子类型、pH、离子强度和有机质等因素对PPCPs吸附的影响,并针对以往研究存在的问题进行了展望.

As a class of environmental pollutants with potential cumulative effects, pharmaceuticals and personal care products(PPCPs) are widely occurenced in water and soil environments. PPCPs can undergo a series of physical, chemical and biological processes in soils and sediments environment. Among these processes, adsorption is a critical environmental process of PPCPs in soils and sediments, which will affect the migration and transformation of PPCPs in the environment and the damage degree of PPCPs to the organism. Heavy metals as a class of common inorganic pollutants can affect the adsorption behavior of PPCPs on the soil/sediment with different effect. In this paper, the adsorption mechanisms of PPCPs in soil/sediment in the presence of heavy metals were summarized. The effects of the functional group composition of PPCPs, type of heavy metals, pH, ionic strength and organic matter on PPCPs adsorption were discussed. Based on that, the problems of the current studies and the prospective directions were proposed.