Adsorption of phenolic compounds from water by a novel ethylenediamine rosin-based resin: Interaction models and adsorption mechanisms. (January 2019)

• Record Type: Journal Article
• Authors: Liu, Shaogang; Wang, Jue; Huang, Wanting; Tan, Xuecai; Dong, Huiyu; Goodman, Bernard A.; Du, Hanchun; Lei, Fuhou; Diao, Kaisheng
• Is Part Of: Chemosphere. Volume 214(2019)
• Page Start: 821
• Page End: 829
• Publication Date: 2019-01
• Subjects: Ethylenediamine rosin-based resin -- Phenolic compounds -- Adsorption mechanism -- Isotherm -- Density-functional-theory; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2018.09.141
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: This study describes the adsorption performance of a novel ethylenediamine rosin-based resin (EDAR) for several industrially-important phenolic compounds. Its removal of 4-nitrophenol (4-NP) from water was comparable to or better than many commercial resins, although it was less effective with other phenols (i. e., phenol, 2, 4-dichlorophenol, 4-chlorophenol, and 4-methylphenol). Experimental conditions for batch adsorption of 4-NP by EDAR are evaluated, the adsorption kinetics is well described by the pseudo-second-order model ( R 2 > 0.99) and isotherm follows the Langmuir isotherm model ( R 2 > 0.99), with the maximum monolayer adsorption capacity of 82 mg g −1 at pH 6.0 and 293 K. The thermodynamic parameters indicate that the adsorption is spontaneous and endothermic. Also, quantum chemistry calculations indicate involvement of hydrogen-bonding between 4-NP and amino groups of EDAR. 4-NP was efficiently desorbed from the loaded EDAR resin by 0.2 M HCl, and the resin could be recycled with only a small decrease in its initial adsorption capacities. Thus, EDAR is a promising adsorbent for the removal of 4-NP during water treatment. Graphical abstract: Image 1 Highlights: Novel ethylenediamine rosin-based resin (EDAR) efficiently removes 4-nitrophenol from water. Adsorption of 4-nitrophenol on EDAR is spontaneous and endothermic. Selectivity for phenols in the order 4-nitrophenol > 2, 4-dichlorophenol > 4-chlorophenol > phenol > 4-methylphenol. The 4-nitrophenol/phenol binary system is described by the Langmuir competitive model. Adsorption involves H-bonding between 4-nitrophenol and amino groups of EDAR.