碳纳米颗粒在环境介质中的沉积过程受到生物界面的影响。然而生物界面组成和结构复杂，并与矿物基质和天然有机质共存，用常规方法确定其对碳纳米颗粒沉积的影响和作用机制存在困难。本研究拟制备人工生物膜来模拟自然界中的生物界面，根据需要调控生物膜中脂类、脂多糖、蛋白质等生物分子组成和比例。选择氧化硅、氧化铝作为人工生物膜的支持基质并在体系中加入天然有机质趋近真实环境。目的在于测定碳纳米颗粒在人工生物膜表面的沉积质量和动力学，分析生物膜中不同组分与碳纳米颗粒的相互作用机理，及电解质、有机质、氧化物基质的影响。为研究碳纳米颗粒的孔隙沉积，采用光蚀刻技术制备微模型模拟孔隙介质，将人工生物膜置入微模型孔隙内部，用成像手段记录和定量碳纳米颗粒在孔隙内部的沉积分布，深入理解碳纳米颗粒如何在生物-矿物-有机质共生介质中沉积和迁移。本研究将建立复杂环境孔隙介质的模拟体系，为预测碳纳米颗粒的环境地学过程提供重要依据。

The deposition of carbon nanomaterials (CNMs) in natural media is affected by bio-surfaces. Bio-surface has complicated composition and structure, exists together with the minerals and natural organic matter (NOM). Hence it is difficult to evaluate the effects of bio-surfaces on the deposition of CNMs and the interactive mechanisms. Therefore, the artificial biomembranes will be prepared in this study to simulate the natural bio-surfaces. The composition and ratio of biomolecules (including lipids, lipopolysaccharides, proteins, etc) in the artificial biomembranes can be adjusted according to the requirements. Silica and aluminum oxides will be selected as the mineral matrix, and NOM will be added in the system. The objectives of this study are to measure the mass and kinetics of CNM deposition on the artificial membranes, to explore the interactive mechanism between biomolecules and CNMs, and to investigate the effects of electrolyte, NOM and oxide matrix. To study the deposition in porous media, a micromodel will be designed and fabricated via photolithographic technique. After setting the artificial biomembranes into the micromodel, the deposition and distribution of CNMs can be imaged and quantified, which will provide better understanding to CNM deposition and transport in the media coexistent organisms, minerals and NOM. This study will develop a new model system to simulate the complicated porous media in the environment, and will predict the environmental geochemical processes of CNMs.