Microwave-Synthesized Barium-Impregnated Siliceous Zeolitic Material Derived from Bagasse Fly Ash for Uptake of Aniline
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- 作者：Bhavna A. Shah ; Amare A. Abebe ; Ajay V. Shah
- 关键词：Aniline ; BFA ; Impregnation ; Si/Al ; Sorption ; Zeolite
- 刊名：Arabian Journal for Science and Engineering
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：42
- 期：1
- 页码：139-152
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Engineering, general; Science, Humanities and Social Sciences, multidisciplinary;
- 出版者：Springer Berlin Heidelberg
- ISSN：2191-4281
- 卷排序：42
文摘
Aniline has been present in wastewater discharged from chemical manufacturing industries which has great impact on human health and environment. Bagasse fly ash (BFA) is a sugar industry waste and synthesized into zeolitic materials used for elimination of aniline from aqueous solution. The microwave-assisted technique employed for transformation of BFA into zeolitic material which was EMZBFA-Ba (electrolyte-treated microwave-irradiated zeolite of bagasse fly ash-barium). It was further modified with Si/Al ratio 30 (EMZBFA-30-Ba) to enhance its hydrophobicity for better sorption of aniline. The synthesized zeolites were characterized by X-ray fluorescence analysis, powdered X-ray diffraction, Fourier transformed infrared spectroscopy, Barrett–Joyner–Halenda, Brunauer–Emmett–Teller and scanning electron microscopy. The characterized materials result confirmed the existence of major minerals such as harmotome, analcime and barium chloroaluminosilicate zeolitic materials. Barium was incorporated into zeolite for structure directing and crystallinity improvement which also enhanced sorption of aniline. The efficacy of removal of aniline was tested at optimum sorption conditions which do have average sorption capacity of 39.06, 45.02 and 48.59 mg/g for BFA, EMZBFA-Ba and EMZBFA-30-Ba, respectively. Langmuir and Freundlich model fitted for sorption process, while the kinetic studies showed that pseudo-second-order rate, intraparticle diffusion and surface sorption were suitable for sorption of aniline. From thermodynamic study, the major interactions of sorbate and sorbent were hydrogen bonding, dipole forces and chemical bond because these strong forces of interaction sorbents may not be highly regenerated.