Comprehension of paraquat adsorption on faujasite zeolite X and Y in sodium form

被引：38

作者：

Rongchapo, Wina ^{[1
]}

Keawkumay, Chalermpan ^{[1
]}

Osakoo, Nattawut ^{[1
]}

Deekamwong, Krittanun ^{[1
]}

Chanlek, Narong ^{[2
]}

Prayoonpokarach, Sanchai ^{[1
]}

Wittayakun, Jatuporn ^{[1
]}

机构：

[1] Suranaree Univ Technol, Inst Sci, Sch Chem, Suranaree Nakhon Ratchas, Muang, Thailand

[2] Synchrotron Light Res Inst SLRI, Nakhon Ratchasima, Thailand

来源：

ADSORPTION SCIENCE & TECHNOLOGY | 2018年 / 36卷 / 1-2期

关键词：

Paraquat; adsorption; faujasite zeolite; NaX; NaY; ion exchange; RICE HUSK; SPECTROSCOPY; COMPLEXES; CHANNELS; SILICA; XPS; NAX;

D O I：

10.1177/0263617417715394

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The nature of paraquat adsorption is compared between zeolite NaX and NaY which have the same faujasite structure but different Si/Al ratio, namely 1.2 and 2.2, respectively. The adsorption was proposed to occur via ion exchange and expected to increase with Al content. However, NaX had a lower paraquat adsorption capacity than NaY. The bare and paraquat-containing zeolites (PQX and PQY) were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, N-2 adsorption-desorption analysis, magic-angle spinning nuclear magnetic resonance (MAS) NMR, and X-ray photoelectron spectroscopy. The presence of adsorbed paraquat was confirmed by Fourier transform infrared spectroscopy. Paraquat adsorbed in supercages of the zeolites resulting in a decrease of surface area and displacement of sodium cations. Results from Na-23 MAS NMR and X-ray photoelectron spectroscopy indicated that interaction of sodium ions in the cavity of NaX was stronger than that in NaY, making it less exchangeable with paraquat.

引用

页码：684 / 693

页数：10

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