工业水处理 ›› 2024, Vol. 44 ›› Issue (7): 67-73. doi: 10.19965/j.cnki.iwt.2023-0631

• 试验研究 • 上一篇    下一篇

Mn2+调控制备ZnO、ZnMn-LDHs及其对磷酸盐的吸附研究

夏梦岩1, 田慧媛1, 仝蕊蕊1, 李阳1, 崔节虎1,2()   

  1. 1. 郑州航空工业管理学院 材料学院, 河南 郑州 450000
    2. 郑州市能源环境材料重点实验室, 河南 郑州 450000
  • 收稿日期:2024-04-22 出版日期:2024-07-20 发布日期:2024-07-31
  • 作者简介:

    夏梦岩(1998— ),硕士生

    崔节虎,博士,教授。E-mail:

  • 基金资助:
    国家自然科学基金项目(21771165); 河南省科技攻关项目(192102310237)

Studies on preparation regulated by Mn2+ and phosphate adsorption of ZnO,ZnMn-LDHs

Mengyan XIA1, Huiyuan TIAN1, Ruirui TONG1, Yang LI1, Jiehu CUI1,2()   

  1. 1. College of Materials Science and Engineering, Zhengzhou University of Aeronautical, Zhengzhou 450000, China
    2. Zhengzhou Key Laboratory of Energy and Environmental Materials, Zhengzhou 450000, China
  • Received:2024-04-22 Online:2024-07-20 Published:2024-07-31

摘要:

含磷废水的大量排放使水体富营养化,最终导致区域水质恶化。为有效去除水中的磷酸盐,以硝酸锌、硝酸锰为原料,三乙醇胺/水为溶剂体系,采用水热法合成ZnO和层状锌锰氢氧化物(ZnMn-LDHs)纳米吸附材料,利用SEM、XRD、Zeta电位仪、FT-IR对纳米材料进行表征,并考察了纳米吸附材料对磷酸盐的去除性能。结果表明:n Znn Mn是影响ZnMn-LDHs向ZnO纳米材料转变的主要因素;ZnO和ZnMn-LDHs对磷酸根的吸附均符合Freundlich等温吸附模型及准二级动力学模型;相同条件下,ZnMn-LDHs对磷酸根的吸附性能优于ZnO;通过0.01 mol/L的NaOH脱附可实现材料的再生,6次循环利用后,ZnO和ZnMn-LDHs对磷酸根的去除率仍可达80%以上。

关键词: ZnO, ZnMn-LDHs, 磷酸根, 循环利用

Abstract:

The discharge of phosphorus-containing wastewater has led to eutrophication of water bodies, ultimately resulting in the deterioration of regional water quality. To effectively remove phosphates from water, ZnO and layered zinc-manganese hydroxide (ZnMn-LDHs) nano-adsorption materials were synthesized using zinc nitrate and manganese nitrate as raw materials and triethanolamine/water as the solvent system by hydrothermal method. The nano-materials were characterized by SEM, XRD, Zeta potentiometer, and FT-IR. The removal performance of nano-adsorption materials for phosphates was investigated. The results showed that the ratio of n Zn to n Mn was the main factor affecting the transformation of ZnMn-LDHs to ZnO nano-materials. The adsorption of phosphate by ZnO and ZnMn-LDHs both conformed to the Freundlich isothermal adsorption model and pseudo-second-order kinetic model. Under the same conditions, the adsorption performance of ZnMn-LDHs for phosphate was better than that of ZnO. The regeneration of the materials could be achieved through desorption with 0.01 mol/L NaOH. After six cycles of utilization, the removal rates of phosphate by ZnO and ZnMn-LDHs could still reach over 80%.

Key words: ZnO, ZnMn-LDHs, phosphate radical, recycling

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