Lipid molecules and trace heavy metals are enriched in sea surface microlayer and can be transferred into the sea spray aerosol. To better understand their impact on marine aerosol generation and evolution, we investigated the interaction of trace heavy metals including Fe³⁺, Pb²⁺, Zn²⁺, Cu²⁺, Ni²⁺, Cr³⁺, Cd²⁺, and Co²⁺, with dipalmitoylphosphatidylcholine (DPPC) monolayers at the air-water interface. Phase behavior of the DPPC monolayer on heavy metal solutions was probed with surface pressure–area (π-A) isotherms. The conformation order and orientation of DPPC alkyl chains were characterized by infrared reflection–absorption spectroscopy (IRRAS). The π-A isotherms show that Zn²⁺ and Fe³⁺ strongly interact with DPPC molecules, and induce condensation of the monolayers in a concentration-dependent manner. IRRAS spectra show that the formation of cation-DPPC complex gives rise to conformational changes and immobilization of the headgroups. The current results suggest that the enrichment of Zn²⁺ in sea spray aerosols is due to strong binding to the DPPC film. The interaction of Fe³⁺ with DPPC monolayers can significantly influence their surface organizations through the formation of lipid-coated particles. These results suggest that the sea surface microlayer is capable of accumulating much higher amounts of these metals than the subsurface water. The organic and metal pollutants may transfer into the atmosphere by this interaction.

脂质分子和痕量重金属富集在海表微层中，可以转移到海雾气溶胶中。为了更好地了解它们对海洋气溶胶生成和演化的影响，我们研究了痕量重金属（包括Fe ³⁺，Pb 2 ⁺，Zn 2 ⁺，Cu 2 ⁺，Ni 2 ⁺，Cr ³⁺，Cd ²⁺和）之间的相互作用。钴²⁺，在空气-水界面处具有二棕榈酰磷脂酰胆碱（DPPC）单层。用表面压力-面积（π-A）等温线探测了DPPC单层在重金属溶液上的相行为。DPPC烷基链的构象顺序和取向通过红外反射吸收光谱法（IRRAS）表征。π-A等温线表明Zn ²⁺和Fe ³⁺与DPPC分子强烈相互作用，并以浓度依赖的方式诱导单层缩合。IRRAS光谱表明，阳离子-DPPC配合物的形成引起构象变化和头基的固定化。目前的结果表明，Zn ²⁺的富集在海上喷雾气溶胶中，是由于与DPPC薄膜的牢固结合。Fe ³⁺与DPPC单层的相互作用可通过形成脂质包覆的颗粒而显着影响其表面组织。这些结果表明，海表微层比地下水能够积聚更多的这些金属。通过这种相互作用，有机污染物和金属污染物可能转移到大气中。