Volume 6 Issue 4
Jul.  2016
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HUANG Yifan, YU Zhihong, LIAN Fei, SHEN Yue, SONG Zhengguo. Adsorption Properties of Nano MnO2 for Cu2+ and Cd2+ in Water[J]. Journal of Environmental Engineering Technology, 2016, 6(4): 350-356. doi: 10.3969/j.issn.1674-991X.2016.04.052
Citation: HUANG Yifan, YU Zhihong, LIAN Fei, SHEN Yue, SONG Zhengguo. Adsorption Properties of Nano MnO2 for Cu2+ and Cd2+ in Water[J]. Journal of Environmental Engineering Technology, 2016, 6(4): 350-356. doi: 10.3969/j.issn.1674-991X.2016.04.052

Adsorption Properties of Nano MnO2 for Cu2+ and Cd2+ in Water

doi: 10.3969/j.issn.1674-991X.2016.04.052
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  • Corresponding author: SONG Zhengguo E-mail: forestman1218@163.com
  • Received Date: 2015-12-28
  • Rev Recd Date: 2016-03-23
  • Publish Date: 2016-07-20
  • Nano manganese dioxide (nMnO2) was synthesized by the two-phase method of aqueous phase and organic phase, its adsorption property of Cu2+and Cd2+ in water, and analyzed the Cu2+ and Cd2+ adsorption characteristics by Langmuir and Freundlich equation. The results showed that the nMnO2 specific surface area is 141.66 m2/g; the adsorption of Cu2+ and Cd2+ respectively reached equilibrium in 500 and 225 min, the adsorption process followed pseudo-second-order kinetics model and Elovich model, the adsorption rate of Cd2+ was higher than that of Cu2+; the adsorption characteristics of nMnO2 on Cu2+ and Cd2+ fit the Langmuir equation, the maximum adsorption amount of Cu2+ and Cd2+ was 104.5 mg/g and 89.1 mg/g respectively; in the adsorption process of Cu2+ and Cd2+, ΔG<0, ΔH<0 and ΔS>0, temperature increase favored the adsorption reaction, so the temperature improving would increase the adsorption of nMnO2 on heavy metal ions; the adsorption ability of nMnO2 on Cu2+ and Cd2+ was greatly influenced by pH in the range of 3-6; the improvement of the system pH would increase the adsorption capacity of nMnO2 on Cu2+ and Cd2+. The synthesis process of nMnO2 is simple and it has good adsorption performance on heavy metal Cu2+ and Cd2+, and it can be used as a good adsorption material.

     

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