Enhancing the adsorption property of macroporous XAD‐2 resin by nanosecond‐pulsed discharge plasma modification

• Published in: Plasma processes and polymers 2021-02, Vol.18 (2), p.n/a
• Main Authors: Xu, Qing‐Nan, Yang, De‐Zheng, Wang, Hong‐Li, Yuan, Hao, Jia, Zi‐Xian, Yang, Hao, Zhou, Xiong‐Feng, Wang, Wen‐Chun, Xu, Yong, Yan, Er‐Yan
• Format: Article
• Language: English
• Subjects: Adsorption; Carbonyl groups; Carbonyls; Discharge; Electron microscopes; Infrared radiation; micro‐mesoporous; Naphthalene; oxygen‐containing functional groups; Photoelectrons; Physiochemistry; plasma treatment; Polycyclic aromatic hydrocarbons; Resins; XAD‐2 resin
• ISSN: 1612-8850; 1612-8869
• DOI: 10.1002/ppap.202000117

In this study, a nanosecond‐pulsed discharge plasma is employed to modify the macroporous XAD‐2 resin to improve the adsorption performance of polycyclic aromatic hydrocarbons. After modification, XAD‐2‐20 resin shows great advantage on naphthalene (Nap) adsorption, whose adsorption capacity increased by 80.6% and 43.5% compared with the raw and XAD‐2‐30, respectively. The physiochemical properties of XAD‐2 resin are characterized by scanning electron microscope, N2 adsorption/desorption, X‐ray photoelectron spectroscopy, and Fourier‐transform infrared (FTIR) spectrum. The amount of micro‐mesoporous with a size of 2–3.5 nm are formed and many carbonyl groups (C═O) and ester or carboxylic groups (O–C═O) are introduced on the XAD‐2‐20 surface, and the value of O/C is increased from 14% to 53% compared with the raw resin. XAD‐2 resin is modified by nanosecond‐pulsed discharge plasma in a packed bed to improve the adsorption capacity of polycyclic aromatic hydrocarbons. After modification, the surface structure of XAD‐2 resin becomes rough and a large number of oxygen‐containing functional groups are inserted on the surface, which enhances the adsorption capacity of XAD‐2 resin.