Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, China.
J Agric Food Chem. 2010 Jul 28;58(14):8338-43. doi: 10.1021/jf101346e.
Competitive adsorption between organic chemicals is an important process affecting their environmental behavior and risk. Overlapping of adsorption sites between solutes was often emphasized in the literature. However, chemicals with different properties may complementarily occupy different sorption sites. The objective of this study was to test this hypothesis by collecting detailed information on competitive and accumulative adsorption of different chemicals on carbon nanomaterials (CNMs). Bisphenol A (BPA) and 17alpha-ethinyl estradiol (EE2) are different with regard to their hydrophobicity and molecular structures, and they were selected as model chemicals. The cumulative adsorption of both BPA and EE2 in bisolute adsorption experiments resulted in much higher total adsorption than in single-solute adsorption experiments. A new competitive-complementary adsorption concept was proposed. This information indicates that the modeling concept of competitive adsorption should be improved to better understand the fate and risk of both CNMs and organic chemicals.
有机化学品之间的竞争吸附是影响其环境行为和风险的重要过程。文献中经常强调溶质之间吸附位点的重叠。然而，具有不同性质的化学品可能会互补地占据不同的吸附位点。本研究的目的是通过收集关于不同化学品在碳纳米材料（CNMs）上的竞争和累积吸附的详细信息来检验这一假设。双酚 A（BPA）和 17alpha-乙炔基雌二醇（EE2）在疏水性和分子结构方面存在差异，因此被选为模型化学品。在双溶质吸附实验中，BPA 和 EE2 的累积吸附导致的总吸附量远高于单溶质吸附实验。提出了一种新的竞争-互补吸附概念。这些信息表明，竞争吸附的建模概念应该得到改进，以更好地理解 CNMs 和有机化学品的命运和风险。
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