无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2022, Vol. 54 ›› Issue (7): 85-90.doi: 10.19964/j.issn.1006-4990.2021-0633

• 研究与开发 • 上一篇    下一篇

绿色法制备多孔球状镧铁复合物及其吸附磷性能研究

姜德彬1(),吕倩凤1,向美玲1,曾兴宇1,张育新2,封丽3   

  1. 1.重庆工商大学环境与资源学院,重庆 400067
    2.重庆大学
    3.重庆市生态环境科学研究院
  • 收稿日期:2021-10-20 出版日期:2022-07-10 发布日期:2022-07-14
  • 作者简介:姜德彬(1984— ),男,博士,主要研究方向为新型环境功能材料;E-mail:jiangdebin@ctbu.edu.cn

Study on preparation of porous spherical lanthanum-iron complex by green method and its phosphate adsorption performance

JIANG Debin1(),LÜ Qianfeng1,XIANG Meiling1,ZENG Xingyu1,ZHANG Yuxin2,FENG Li3   

  1. 1.College of Environment and Resources, Chongqing Technology and Business University, Chongqing, 400067
    2.Chongqing University
    3.Chongqing Academy of Eco-Environmental Science
  • Received:2021-10-20 Published:2022-07-10 Online:2022-07-14

摘要:

利用水热法和碱刻蚀法制备多孔球状镧铁复合物(LFA-C)。通过扫描电镜(SEM)、红外光谱仪(FTIR)、X射线衍射仪(XRD)和比表面及微孔物理吸附仪对复合物材料进行表征分析,并考察其作为吸附剂对磷酸盐的吸附性能。结果表明,LFA-C材料表面形貌粗糙多孔,碱刻蚀过程促进氢氧化镧在LFA-C的表面生成,同时LFA-C的比表面积增加有利于获得更多的吸附活性位点。吸附动力学研究表明,LFA-C的吸附过程符合准二级动力学模型。热力学研究发现Langmiur模型能更好地拟合吸附等温线,拟合饱和吸附量为159.08 mg/g。在共存离子条件下,LFA-C吸附磷酸盐的抗干扰能力强,同时LFA-C通过吸附-解析过程展现出良好的循环性能。LFA-C作为高效去磷、抑制富营养化的环境功能材料,具有广阔的应用前景。

关键词: 镧铁复合物, 吸附, 磷酸盐

Abstract:

Porous spherical lanthanum-iron complexes(LFA-C) were prepared by hydrothermal and alkaline etching methods.The composite was characterized and analyzed by scanning electron microscopy(SEM),fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),specific surface and microporous physical adsorption instrument.And its adsorption properties of phosphate as adsorbent was investigated.The results showed that the surface of porous lanthanum-iron complexes was rough and porous.The alkali etching process promoted the formation of La(OH)3 on the surface of LAF-C.At the same time,the increase of the specific surface area of LAF-C was conducive to obtain more adsorption active sites.The study of adsorption kinetics showed that the adsorption process of LAF-C conformed to the quasi second-order kinetic model.The saturated adsorption capacity was 159.08 mg/g.Under the condition of coexisting ions,LAF-C had strong anti-interference ability to adsorb phosphate.At the same time,LAF-C showed good cyclic performance through adsorption-desorption process.As an environmental functional material with high efficiency in dephosphorization and eutrophication inhibition,LFA-C had broad application prospects.

Key words: lanthanum-iron complexes, adsorption, phosphate

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