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Adsorption of Polycyclic Aromatic Hydrocarbons from aqueous solution by Organic Montmorillonite Sodium Alginate Nanocomposites TEXT SIZE: A A A
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. (C) 2020 Elsevier Ltd. All rights reserved.
 

Publication name

 CHEMOSPHERE Volume: 251 Article Number: 126074 DOI: 10.1016/j.chemosphere.2020.126074 Published: JUL 2020

Author(s)

 Dai, Wen-Jing; Wu, Pan; Liu, Di; Hu, Jian; Cao, Yang; Liu, Tao-Ze; Okoli, Chukwunonso Peter; Wang, Bing; Li, Ling

Corresponding author(s) 

 HU Jian 
 jianhu@rcees.ac.cn   
 Chinese Acad Sci, Res Ctr Ecoenvironm Sci, 18 Shuangqing Rd, Beijing 100085, Peoples R China.

Author(s) from IGCAS   DAI Wenjing; LIU Taoze

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