Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (3): 336-342.DOI: 10.11944/j.issn.1000-0518.2016.03.150257

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Preparation of Manganese Ferrite/Humic Acid Composite and Its Adsorption Properties for Methylene Blue

JIN Tingjiaa,ZHANG Xianglinab*(),XU Jiana   

  1. a Anhui Jianzhu University School of Materials and Chemical Engineering Hefei 230601,China
    bAnhui Province Key Laboratory of Advanced Building Materials,Hefei 230622,China
  • Received:2015-07-21 Accepted:2015-09-25 Published:2016-03-02 Online:2016-03-02
  • Contact: ZHANG Xianglin
  • Supported by:
    Supported by the Governor of Anhui Delta Joint Scientific Research Project(No.1101c0603053), Anhui Jianzhu University Science and Technology Innovation Fund Project(No.201310878016)

Abstract:

Humic acid(HA)-coated manganese ferrite(MnFe2O4/HA) magnetic composite materials were prepared with chemical coprecipitation method and its nanoparticles were characterzied by X-ray diffraction(XRD), scanning electron microscopy(SEM) and Fourier transform infrared(FT-IR) analysis. The results show that the size of the product is about 200 nm. MnFe2O4/HA has a typical spinel structure and is successfully coated with humic acid on its surface. The saturation magnetization of MnFe2O4/HA is 34.01 A·m2/kg. MnFe2O4/HA can be separated from water with low magnetic field within 30 seconds. The adsorption of methylene blue is a pseudo second-rate kinetic process and reaches equilibrium in about 2 h, in good agreement with the Langmuir adsorption model. MnFe2O4/HA has higher adsorption ability than that of pure MnFe2O4. The max adsorbing capacity can reach 29.94 mg/g at room temperature and pH=9. MnFe2O4/HA can be used as adsorption material for effective removal of methylene blue from waste water.

Key words: manganese ferrite, humic acid, methylene blue, selective adsorption, regeneration