Journal of Inorganic Materials, Volume. 35, Issue 3, 301(2020)
Figures & Tables(12)
. SEM images of the Biochar@Kaolin and Biochar@Bentonite before and after the reaction with Cr(VI)
. TEM images of the Biochar@Kaolin and Biochar@Bentonite before and after the reaction with Cr(VI)
. EDS spectra of the Biochar@Kaolin and Biochar@Bentonite before and after the reaction with Cr(VI)
. FT-IR spectra of Biochar, Kaolin, Bentonite, Biochar@Kaolin and Biochar@Bentonite
. Effect of pH on the removal of Cr (VI) by the Biochar@Kaolin (a) and Biochar@Bentonite (b)
. Effect of SO42- on the removal of Cr (VI) by the Biochar@Kaolin (a) and Biochar@Bentonite (b)
. Adsorption data and modeling for Cr(VI) ions removal by Biochar, Biochar@Kaolin and Biochar@Bentonite, respectively
Table 1.
Characterizations of Biochar, Biochar@Kaolin and Biochar@Bentonite
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Characterizations of Biochar, Biochar@Kaolin and Biochar@Bentonite
Sample BET specific surface area/(m2·g-1) Average pore width/nm Biochar 2.79 39.37 Biochar@Kaolin 6.15 83.41 Biochar@Bentonite 3.08 56.18
Table 2.
Pseudo-first order kinetic and pseudo-second order kinetic parameters of Cr(VI) ions removal by Biochar, Biochar@Kaolin and Biochar@Bentonite
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Pseudo-first order kinetic and pseudo-second order kinetic parameters of Cr(VI) ions removal by Biochar, Biochar@Kaolin and Biochar@Bentonite
Sample Pseudo-first-order Pseudo-second-order q e/(mg·g-1)k 1/min-1R 2q e/(mg·g-1)K 2/(g·mg-1·min-1)R 2Biochar 6.54 0.056 0.967 7.80 0.063 0.990 Biochar@Kaolin 7.07 0.092 0.947 8.91 0.122 0.986 Biochar@Bentonite 7.70 0.048 0.971 9.41 0.052 0.991
Table 3.
Parameters of adsorption isotherms for Cr(VI) ions removal by Biochar, Biochar@Kaolin and Biochar@Bentonite at 20, 30 and 40 ℃, respectively
View tableView in ArticleTable 3.
Parameters of adsorption isotherms for Cr(VI) ions removal by Biochar, Biochar@Kaolin and Biochar@Bentonite at 20, 30 and 40 ℃, respectively
T /℃Sample Langmuir adsorption model Freundlich adsorption model Q max/(mg·g-1)K L/(L·mg-1)R 2K F/((mg·g)-1/n )1/ n R 220 Biochar@Kaolin 15.58 0.0029 0.978 3.57 0.0064 0.995 Biochar@Bentonite 20.54 0.035 0.980 6.75 0.0042 0.903 30 Biochar@Kaolin 68.98 0.0063 0.940 4.55 0.0083 0.992 Biochar@Bentonite 23.64 0.058 0.967 10.53 0.0033 0.942 40 Biochar@Kaolin 76.62 0.13 0.795 9.61 0.0028 0.996 Biochar@Bentonite 27.23 0.28 0.956 14.82 0.0016 0.852
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Hai WANG, Ningcan YANG, Muqing QIU.
Paper Information
Category: RESEARCH PAPER
Received: Jul. 15, 2019
Accepted: --
Published Online: Jan. 27, 2021
The Author Email: QIU Muqing (qiumuqing@126.com)
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