CIESC Journal ›› 2016, Vol. 67 ›› Issue (S1): 353-358.doi: 10.11949/j.issn.0438-1157.20151656

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Preparation and characterization of activated carbon from Alternanthera philoxeroides by K2CO3 activation

CHEN Wenting, RAN Qicheng, CAI Xianzong, LI Xianfa, XU Jianrong   

  1. School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
  • Received:2015-11-03 Revised:2016-01-27 Online:2016-08-31 Published:2016-08-31
  • Supported by:

    supported by the Key Project of Education Department of Sichuan Province (14ZA0092) and the Doctor Foundation of Southwest University of Science and Technology (14zx7155).

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Abstract:

A series of activated carbons (ACs) were prepared from Alternanthera philoxeroides (AP) by K2CO3 one-step mixing activation. The effects of various process parameters, such as mixing mass ratio of K2CO3 to AP, activation temperature and period, on the adsorptive property and the yield of AC were investigated. The surface morphology of AC were characterized with scanning electron microscopy (SEM). The results indicate that the optimized activation conditions were 1.5 of K2CO3 to AP mixing mass ratio, 800℃ of activation temperature, 3.0 h of the activation time. The yield, iodine number and methylene blue (MB) number of AC were 13.79%, 1477 mg·g-1, 384 mg·g-1, respectively. The recovery ratios of K2CO3 were over 80% when the nitrogen flow rate was no more than 100 ml·min-1. The SEM images of the ACs showed that the activation temperature has obvious effect on the porous structure.

Key words: activated carbon, Alternanthera philoxeroides, preparation, activation, adsorption

CLC Number: 

  • Q35
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