Risby T H, Sehnert S S, Jiang L, Dhingra B S
Department of Environmental Health Sciences, Johns Hopkins University School of Hygiene and Public Health, Baltimore, MD 21211.
Environ Health Perspect. 1988 Apr;77:141-9. doi: 10.1289/ehp.8877141.
The release of molecules adsorbed on the surfaces of amorphous carbon blacks has been studied using liquid-solid chromatography. Adsorbate molecules, adsorbents, and mobile phases were selected on the basis of their relevance as models for the release of toxic agents adsorbed on inhalable environmental particulate matter that originates from the incomplete combustion of organic materials. The presence of surface active groups on the carbon blacks has been shown to adsorb and retain adsorbate molecules selectively, and this selectivity can be reduced by competition for these active groups by the displacing solvent. Release is also governed by the surface coverage of the particles and increases as coverage approaches the monolayer.
已使用液固色谱法研究了吸附在无定形炭黑表面的分子的释放情况。基于它们作为吸附在可吸入环境颗粒物上的有毒物质释放模型的相关性，选择了被吸附物分子、吸附剂和流动相，这些可吸入环境颗粒物源自有机材料的不完全燃烧。已证明炭黑表面活性基团的存在会选择性地吸附和保留被吸附物分子，并且这种选择性可通过置换溶剂对这些活性基团的竞争作用而降低。释放还受颗粒表面覆盖率的控制，并且随着覆盖率接近单分子层而增加。
