Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (3): 441-445.DOI: 10.12068/j.issn.1005-3026.2018.03.027

• Resources & Civil Engineering • Previous Articles     Next Articles

Experiment and Mechanistic Study on Adsorption and Removal of Heavy Metals in Water by Corncob-Based Activated Carbon

ZHAO Yan, LANG Lang, JIANG Bin-hui, DENG Shuo   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2016-10-14 Revised:2016-10-14 Online:2018-03-15 Published:2018-03-09
  • Contact: JIANG Bin-hui
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Abstract: The corncob-based activated carbon was prepared by the carbonization with muffle furnace under different process conditions, and the corncob of wasted crops was used as raw material. The adsorption performance for heavy metals, such as Zn, Mn and Pb, were investigated, and the adsorption mechanism of the corn cob-based activated carbon for heavy metal zinc was studied by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM and EDS). Then the desorption experiment was carried out on the adsorbent after adsorption. The results showed that the corncob-based activated carbon prepared by appropriate technology has a very high adsorption rate for zinc ions in water, the adsorption kinetic behavior accords with the quasi-second order kinetics equation. For the desorption of corncob-based activated carbon, the effect of acid desorption is better than electric field intervention desorption. The preliminary conclusion is that the corncob-based activated carbon can be used for absorbing heavy metals and is a kind of low-cost adsorbent.

Key words: corncob, zinc ion, adsorption, adsorption mechanism, desorption

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