Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong.
Environ Pollut. 2010 May;158(5):1669-74. doi: 10.1016/j.envpol.2009.12.003. Epub 2010 Jan 6.
Batch adsorption experiments were carried out to study the adsorptive removal and diffusion mechanism of para-chlorophenol (p-CP) onto Calgon Filtrasorb 400 (F400) activated carbon. The external mass transfer resistance is negligible in the adsorption process carried out under different conditions in batch operation. Intraparticle diffusion model plots were used to correlate the batch p-CP adsorption data; three distinct linear sections were obtained for every batch operation. The textural properties of F400 activated carbon showed that it has a large portion of supermicropores, which is comparable to the size of the p-CP molecules. Due to the stronger interactions between p-CP molecules and F400 micropores, p-CP molecules predominantly diffused and occupied active sites in micropore region by hopping mechanism, and eventually followed by a slow filling of mesopores and micropores. This hypothesis is proven by the excellent agreement of the intraparticle diffusion model plots and the textural properties of F400 activated carbon.
进行了批量吸附实验，以研究对氯苯酚（p-CP）在Calgon Filtrasorb 400（F400）活性炭上的吸附去除和扩散机制。在分批操作中不同条件下进行的吸附过程中，外部传质阻力可以忽略不计。使用颗粒内扩散模型图对批处理 p-CP 吸附数据进行关联；对于每个批处理操作，都获得了三个明显的线性部分。F400 活性炭的结构特性表明，它具有很大一部分的超微孔，这与 p-CP 分子的大小相当。由于 p-CP 分子与 F400 微孔之间的相互作用更强，p-CP 分子主要通过跳跃机制在微孔区域扩散并占据活性位，最终缓慢填充介孔和微孔。这种假设通过颗粒内扩散模型图与 F400 活性炭的结构特性之间的良好一致性得到证明。
