PREPARATION OF GOETHITE-MODIFIED BIOCHAR AND ITS ADSORPTION CAPACITY ON Cr(Ⅵ)

WANG Ziting; ZOU Jiawei; ZHOU Jiti; JIN Ruofei

doi:10.13205/j.hjgc.202211014

Volume 40 Issue 11

Nov. 2022

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WANG Ziting, ZOU Jiawei, ZHOU Jiti, JIN Ruofei. PREPARATION OF GOETHITE-MODIFIED BIOCHAR AND ITS ADSORPTION CAPACITY ON Cr(Ⅵ)[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 98-104. doi: 10.13205/j.hjgc.202211014

Citation:

WANG Ziting, ZOU Jiawei, ZHOU Jiti, JIN Ruofei. PREPARATION OF GOETHITE-MODIFIED BIOCHAR AND ITS ADSORPTION CAPACITY ON Cr(Ⅵ)[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 98-104. doi: 10.13205/j.hjgc.202211014

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PREPARATION OF GOETHITE-MODIFIED BIOCHAR AND ITS ADSORPTION CAPACITY ON Cr(Ⅵ)

doi: 10.13205/j.hjgc.202211014

School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China

Received Date: 2022-01-04
Available Online: 2023-03-24

Abstract

Abstract

Goethite-modified biochar (GMB) was prepared by hydrolytic co-precipitation under different pyrolysis temperatures and raw material ratios, characterized by SEM-EDS, XRD, FTIR and XPS. Adsorption experiments of Cr(Ⅵ) for exploring the adsorption performance and mechanism were carried out. The results showed that:1) modification with goethite formed iron hydroxyl oxide (FeOOH) on the surface of biochar and greatly improved its adsorption capacity; 2) the best adsorption capacity of 20.67 mg/g was performed by modified biochar GMB600-12 with pyrolysis temperature at 600℃ and mass ratio of biochar and Fe(NO₃)₃·9H₂O at 1:12; 3) the adsorption of Cr(Ⅵ) was mainly chemisorption as revealed by quasi-second-order kinetics, and both Langmuir model and Freundlich model could well describe the adsorption characteristics of Cr(Ⅵ) by GMB; 4) the removal of Cr(Ⅵ) from aqueous solution by GMB is a synergistic effect of redox and surface adsorption.
- biochar,
- goethite,
- Cr(Ⅵ),
- absorption

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References(28)

References

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