吸附
菲
水溶液
蒙脱石
化学
弗伦德利希方程
化学工程
苊
肺表面活性物质
有机化学
生物化学
工程类
作者
Wenjing Dai,Pan Wu,Di Liu,Jian Hu,Yang Cao,Tao-Ze Liu,Chukwunonso Peter Okoli,Bing Wang,Ling Li
出处
期刊:Chemosphere
[Elsevier]
日期:2020-07-01
卷期号:251: 126074-126074
被引量:58
标识
DOI:10.1016/j.chemosphere.2020.126074
摘要
The adsorption method is generally considered a promising technique to remove inorganic and organic contaminants in an economically and environmentally friendly superior manner. In this study, organic montmorillonite sodium alginate composites were prepared, in which, montmorillonite and cationic surfactant (cetyltrimethylammonium bromide, CTAB) in different added amounts were coagulated with sodium alginate using CaCl2 as the crosslinking agent. The morphological properties of the composites were characterized thoroughly and employed in three typical target pollutants of polycyclic aromatic hydrocarbons (PAHs) (acenaphthene, fluorene, and phenanthrene) by batch adsorption experiments from aqueous solution. The composites provide an efficient alternative for PAHs removals. The composites could be stably separated and regenerated with methyl alcohol. Furthermore, the adsorption kinetic and isotherm data were well described by the Elovich kinetic and the Freundlich isotherm model, respectively. According to these, the adsorption process occurred via multilayer adsorption on the composite’s energetically heterogeneous surface. Moreover, pore diffusion and hydrophobicity played a dominant role in the adsorption mechanism. Overall, our study offers a developed adsorbent that has the advantage of being recyclable, low cost, biodegradable and biocompatible for effectively removing PAHs from aqueous solution.
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