Adsorption Kinetics of Low Mercury Solution with Durian Shell and Activated Carbon

ZHAO Zi-ke; CHEN Chun-liang; KE Sheng; ZHAO Li-rong; ZHANG Ji-biao; LI Jian

doi:10.15898/j.cnki.11-2131/td.202106010069

2022 Vol. 41, No. 1

Article Contents

Article navigation > Rock and Mineral Analysis > 2022 > 41(1): 90-98

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ZHAO Zi-ke, CHEN Chun-liang, KE Sheng, ZHAO Li-rong, ZHANG Ji-biao, LI Jian. Adsorption Kinetics of Low Mercury Solution with Durian Shell and Activated Carbon[J]. Rock and Mineral Analysis, 2022, 41(1): 90-98. doi: 10.15898/j.cnki.11-2131/td.202106010069

Citation:

ZHAO Zi-ke, CHEN Chun-liang, KE Sheng, ZHAO Li-rong, ZHANG Ji-biao, LI Jian. Adsorption Kinetics of Low Mercury Solution with Durian Shell and Activated Carbon[J]. Rock and Mineral Analysis, 2022, 41(1): 90-98. doi: 10.15898/j.cnki.11-2131/td.202106010069

Adsorption Kinetics of Low Mercury Solution with Durian Shell and Activated Carbon

1.
Analysis and Test Centre, Guangdong Ocean University, Zhanjiang 524088, China
2.
College of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang 524088, China
3.
College of Food Science and Engineering, Guangdong Ocean University, Zhanjiang 524088, China

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Corresponding author: CHEN Chun-liang, 13822586665@126.com

Received Date: 01 June 2021

Revised Date: 20 July 2021

Accepted Date: 28 August 2021

Publish Date: 28 January 2022

Abstract

Abstract

BACKGROUND
The direct discharge of Hg(Ⅱ) is harmful to the environment. At present, activated carbon is used to remove it, but the production of activated carbon through high-temperature pyrolysis and activation is very expensive.
OBJECTIVES
To investigate the adsorption difference and mechanism on low-concentration Hg(Ⅱ) for durian shell, coconut shell activated carbon and activated carbon fiber under different conditions.
METHODS
The remaining Hg(Ⅱ) in the adsorption solution was determined by atomic fluorescence spectrometry. The adsorb kinetic parameters of different adsorbents were determined by Lagergren pseudo-second-order kinetic model.
RESULTS
In the Lagergren pseudo-second-order kinetic model, the maximum adsorption capacity (Q_M) of the three materials was as follows: activated carbon fiber (5.61μg/g)>durian shell (1.68μg/g)>coconut shell activated carbon (0.96μg/g). The adsorption test and thermodynamic equation showed that the adsorption of Hg(Ⅱ) by the three materials was spontaneous (ΔG < 0). The adsorption of Hg(Ⅱ) by coconut shell activated carbon was mainly physical adsorption (ΔH>0), while the adsorption of durian shell was an endothermic process (ΔH < 0). Due to the increase of temperature, the adsorption rate and adsorption capacity were improved.
CONCLUSIONS
Durian shell from a wide range of sources can be used as an effective adsorbent to treat wastewater containing Hg(Ⅱ).
- durian shell /
- carbon materials /
- mercury /
- atomic fluorescence spectrometry /
- adsorption kinetics

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References

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