酸-镁改性蒙脱土的制备及对磷酸盐吸附性能的研究

doi:10.11896/cldb.22110326

材料导报

2023, Vol. 37

Issue (24): 22110326-7 https://doi.org/10.11896/cldb.22110326

无机非金属及其复合材料

酸-镁改性蒙脱土的制备及对磷酸盐吸附性能的研究

余义昌¹, 彭枫¹, 姜德彬², 李凯霖³, 陈婷婷¹, 马腾飞¹, 封丽^1,*

1 重庆市生态环境科学研究院,中国环境科学研究院西南分院,重庆 401147
2 重庆工商大学环境与资源学院,重庆 400067
3 重庆大学材料科学与工程学院,重庆 400044

Preparation of Acid-Magnesium Modified Montmorillonite and Its Adsorption Performance for Phosphate

YU Yichang¹, PENG Feng¹, JIANG Debin², LI Kailin³, CHEN Tingting¹, MA Tengfei¹, FENG Li^1,*

1 Chongqing Academy of Eco-Environmental Science, Southwest Branch of Chinese Academy of Environmental Sciences, Chongqing 401147, China
2 School of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
3 School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China

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摘要以蒙脱土为原材料,盐酸和七水合硫酸镁为改性剂,通过浸渍法合成酸-镁改性蒙脱土(MgHMT),研究其对磷酸盐的吸附性能。并结合扫描电子显微镜(SEM)、X射线衍射仪(XRD)、比表面积与孔径分析(BET)和X射线光电子能谱分析(XPS)对其进行形貌结构分析。结果表明,改性前后材料的表面结构无明显变化,但其比表面积减小,平均孔径增大,Mg²⁺以插层电子的形式负载到蒙脱土上。酸-镁改性蒙脱土对磷酸盐的吸附可在10 min内达到平衡,吸附过程符合Langmuir吸附模型,其吸附性能相比改性前提高2.1倍。吸附过程以化学吸附为主,氨氮的存在有助于磷酸盐的吸附。

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关键词: 改性蒙脱土磷酸盐吸附

Abstract: The acid-Mg modified montmorillonite (MgHMT) was prepared by dipping method using montmorillonite as raw materials, hydrochloric acid and magnesium sulfate heptahydrate as modifiers. Its adsorption performance for phosphates was studied. Scanning electron microscopy (SEM), X-Ray Diffractomer, surface area and pore size analysis (BET), X-ray photoelectron spectroscopy (XPS) were used for the analysis of morphology and structure. The results showed that the surface structure of the material did not change significantly after the modification, but its specific surface area decreased and the average pore diameter increased. Mg ions are loaded onto montmorillonite in the form of intercalated electrons. The adsorption of phosphate by HHMT can reach adsorption equilibrium within 10 min. The adsorption process conformed to the Langmuir adsorption model, and its adsorption performance was 2.1 times higher than that of pure montmorillonite. The adsorption process was dominated by chemical adsorption, and the presence of ammonia nitrogen promoted the adsorption of phosphate.

Key words: modification montmorillonite phosphate adsorption

发布日期: 2023-12-19

ZTFLH:	TB34
	X52

基金资助: 重庆市技术创新与应用示范专项(cstc2018jszx-zdyfxmX0013);重庆市科研机构绩效激励引导专项(cstc2019jxjl50004)

通讯作者: *封丽,2005年6月、2008年6月、2022年6月分别于重庆师范大学获得理学学士学位,重庆大学获得理学硕士学位和工程博士学位。现为重庆市生态环境科学研究院(中国环境科学研究院西南分院)水环境工程技术创新中心主任,正高级工程师。目前主要研究领域为流域水污染治理、环境规划、环境标准编制、环境功能材料等。发表各类论文40余篇,获多项授权专利。cqhky_fl@163.com

作者简介: 余义昌,2013年6月、2018年9月分别于中南民族大学和同济大学获得理学学士学位和工学博士学位。现为重庆市生态环境科学研究院(中国环境科学研究院西南分院)水环境工程技术创新中心高级工程师。目前主要研究领域为流域水污染治理,环境功能材料研发等。发表各类论文20余篇,获授权专利1项。

引用本文:

余义昌, 彭枫, 姜德彬, 李凯霖, 陈婷婷, 马腾飞, 封丽. 酸-镁改性蒙脱土的制备及对磷酸盐吸附性能的研究[J]. 材料导报, 2023, 37(24): 22110326-7.
YU Yichang, PENG Feng, JIANG Debin, LI Kailin, CHEN Tingting, MA Tengfei, FENG Li. Preparation of Acid-Magnesium Modified Montmorillonite and Its Adsorption Performance for Phosphate. Materials Reports, 2023, 37(24): 22110326-7.

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http://www.mater-rep.com/CN/10.11896/cldb.22110326 或 http://www.mater-rep.com/CN/Y2023/V37/I24/22110326

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