Study on the Synthesis and Structural Properties of Zeolite A-MgO Composite for Defluoridation of Water

IF 1.5 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Transactions of the Indian Ceramic Society Pub Date : 2021-07-03 DOI:10.1080/0371750X.2021.1978864

A. Chakraborty, M. Naskar

引用次数: 0

Abstract

Zeolite A-MgO composite was synthesized in presence of zeolite A particles, MgCl2 and urea solution under hydrothermal reaction at 150oC for 5 h followed by calcination at 600°C/2 h. XRD and FTIR results showed the crystallization of MgO along with NaA zeolite crystals. Nano-sheet like MgO particles (50-70 nm) were grown onto the surface of NaA zeolite crystals (1 μm). BET surface area and pore size of the sample were found to be 69 m2.g−1 and 3.9 nm, respectively. XPS analysis showed the binding energies of O1s, Si2p, Na1s, Al2p and Mg2p as 531.6, 102.4, 1072.2, 74.2 and 49.9 eV, respectively. The synthesized product (1 g.L−1 dose) showed 72% adsorption of fluoride (7.24 mg.L−1) within 5 min and reached up to 94% for 90 min at pH 6.8. The adsorption capacity of the sample was calculated as 107.64 mg.g−1 from Langmuir isotherm. The sample could be regenerated up to 5th cycle. A tentative mechanism for the adsorption of fluoride from aqueous solution by the synthesized zeolite A-MgO composite was proposed. GRAPHICAL ABSTRACT

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水除氟用A-MgO沸石复合材料的合成及结构性能研究

在沸石A颗粒、MgCl2和尿素溶液的存在下，在150℃水热反应5小时，然后在600°C/2小时煅烧，合成了沸石A-MgO复合材料。XRD和FTIR结果表明，MgO与NaA沸石晶体一起结晶。纳米片状MgO颗粒（50-70nm）生长在NaA沸石晶体（1μm）表面。发现样品的BET表面积和孔径分别为69 m2.g−1和3.9 nm。XPS分析显示，O1s、Si2p、Na1s、Al2p和Mg2p的结合能分别为531.6、102.4、1072.2、74.2和49.9eV。合成产物（1 g.L−1剂量）在5分钟内对氟化物（7.24 mg.L−1）的吸附率为72%，在pH 6.8下90分钟内达到94%。根据Langmuir等温线计算出样品的吸附容量为107.64 mg.g−1。样品可以再生至第5个循环。提出了合成的A-MgO沸石复合材料吸附水溶液中氟化物的初步机理。图形摘要

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来源期刊

Transactions of the Indian Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

2.40

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Transactions of the Indian Ceramic Society is a quarterly Journal devoted to current scientific research, technology and industry-related news on glass and ceramics. The Journal covers subjects such as the chemical, mechanical, optical, electronic and spectroscopic properties of glass and ceramics, and characterization of materials belonging to this family. The Editor invites original research papers, topical reviews, opinions and achievements, as well as industry profiles for publication. The contributions should be accompanied by abstracts, keywords and other details, as outlined in the Instructions for Authors section. News, views and other comments on activities of specific industries and organizations, and also analyses of industrial scenarios are also welcome.