多孔硅酸镁的表征及其对糖汁中没食子酸的吸附

程昊; 孙黎明; 唐婷范; 孔红星; 李利军

doi:10.13386/j.issn1002-0306.2020.09.002

多孔硅酸镁的表征及其对糖汁中没食子酸的吸附

程昊^1,2,
孙黎明¹,
唐婷范¹,
孔红星¹,
李利军^1,2, ,

1. 广西科技大学生物与化学工程学院/广西糖资源绿色加工重点实验室, 广西柳州 545006;
2. 蔗糖产业省部共建协同创新中心, 广西南宁 530004

基金项目:

广西自然科学基金项目青年基金项目(2016GXNSFBA380073)

广西高等学校高水平创新团队及卓越学者计划资助项目(桂教人[2014]7号)

广西糖资源绿色加工重点实验室开放课题(GXTZY201701)。

广西壮族自治区中青年教师基础能力提升项目(KY2016YB250)

广西自然科学基金重点项目(2019GXNSFDA245025)

国家自然科学基金地区科学基金项目(31560466)

详细信息

作者简介:
程昊(1980-),男,硕士,副研究员,研究方向:制糖科学与工程及应用化学,E-mail:iamchenghao@126.com。

通讯作者:
李利军(1966-),男,博士,教授,研究方向:制糖科学与工程及应用化学,E-mail:gxustllj@163.com。

中图分类号: TS201.1
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出版历程
- 收稿日期: 2019-07-31
- 网络出版日期: 2020-11-12
- 刊出日期: 2020-04-30

Characterization of Porous Magnesium Silicate and Adsorption of Gallic Acid in Sugar Juice

1. Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China;
2. Province and Ministry Co-sponsored Collaborative Innovation Center of Sugar cane and Sugar Industry, Nanning 530004, China

摘要

摘要: 本文结合水热合成法和模板法,以氯化镁和硅胶球为前驱体制备多孔硅酸镁,用作糖汁清净剂。运用XRD、FTIR和SEM等多种表征手段对多孔硅酸镁进行了表征。以多孔硅酸镁作为吸附剂,以吸附量为指标,考察了吸附时间、初始浓度对多孔硅酸镁吸附没食子酸性能的影响。由表征结果可知,制备的硅酸镁为孔径为5和22 nm为主的介孔球形多孔硅酸镁;吸附实验结果表明,当没食子酸的初始浓度分别为25、50、75 mg/L时,多孔硅酸镁对没食子酸的吸附过程均可用准二级动力学方程描述(R²分别为0.9965、0.9941、0.9941),附等温曲线符合Freundlich模型(R²=0.9926)。方法可为制糖工艺吸附脱色提供理论研究基础。
- 多孔硅酸镁 /
- 没食子酸 /
- 吸附 /
- 糖汁
Abstract: In this paper the porous magnesium silicate was prepared by hydrothermal synthesis method and template method with magnesium chloride and silica gel as precursors. The magnesium silicate was characterized by XRD,FTIR and SEM analysis. Porous magnesium silicate was used as adsorbent and adsorption as an index,the effects of adsorption time and initial concentration on the adsorption of gallic acid by porous magnesium silicate were investigated. The characterization results showed the mesoporous spherical porous magnesium silicates with a pore diameter of 5 nm and 22 nm was obtained. The adsorption results showed that the pseudo-second-order equation provided the best correlation to the experimental data(R² was 0.9965、0.9941、0.9941)when the initial gallic acid concentration were 25,50,75 mg/L,and the adsorption isotherm could be described by Freundlich isothermal adsorption equation(R²=0.9926). The method can provide a theoretical research basis for the adsorption and decolorization of sugar industry.
- porousmagnesium silicate /
- gallic acid /
- adsorption /
- sugar juice