Characterization and adsorption performance of CdMn2O4 nanocomposite as a new highly efficient adsorbent

  • R. Mohammadzadeh KakhkiEmail author
  • F. Ahsani
  • S. Yaghoobi Rahni
Original Paper


In the present report, a novel cadmium-manganese oxide (CdMn2O4) nanocomposite was prepared using a simple co-precipitation method and further characterized for its properties and adsorption performance. XRD analysis showed the formation of CdMn2O4 crystalline phase. FESEM images showed that this new crystal compound has spherical morphology with the average size of 50 nm. Moreover, FTIR analysis gave some structural information of this new nanoadsorbent. For evaluation of the adsorption ability of this nanocomposite, a cationic dye, methylene blue, was employed. The different conditions such as concentration of dye, amount of sorbent and solution pH for improving sorption efficiency were studied. Due to unique structural features, CdMn2O4 nanocomposite showed a high efficiency for the removal of cationic dye. The results showed that it can remove methylene blue up to 93% in 10 min. The adsorption isotherms (Langmuir and Freundlich models) were also plotted. qmax and b values obtained from Langmuir plot were 30.3 mg/g and 1010.1 mg/L, respectively. Furthermore, the n value (1.66) and Kf (0.083 mg/g) were reported from Freundlich model. Moreover, adsorption kinetic obeys pseudo-second-order model with the rate constant 0.092 (g/mg min). The obtained results obviously revealed that this newly synthesized nanoadsorbent is highly useful and cost-effective for eliminating cationic methylene blue dye from water.


CdMn2O4 nanocomposite Characterization Adsorption Methylene blue 



The authors wish to thank all who assisted in conducting this work.

Compliance with ethical standards

Conflict of interest

All authors declare that they have no conflict of interest.


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© Islamic Azad University (IAU) 2018

Authors and Affiliations

  • R. Mohammadzadeh Kakhki
    • 1
    Email author
  • F. Ahsani
    • 1
  • S. Yaghoobi Rahni
    • 2
  1. 1.Department of Chemistry, Faculty of SciencesUniversity of GonabadGonabadIran
  2. 2.Department of EnvironmentVelayat UniversityIranshahrIran

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