Heavy Metal Adsorption Mechanism of Red Mud-based Adsorbent in Acidic Wastewater

CHI Shuyan; WANG Bohan; HUANG Dandan; ZHAO Bing

doi:10.13779/j.cnki.issn1001-0076.2023.01.008

2023 Vol. 43, No. 1

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Article navigation > Conservation and Utilization of Mineral Resources > 2023 > 43(1): 86-91

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CHI Shuyan, WANG Bohan, HUANG Dandan, ZHAO Bing. Heavy Metal Adsorption Mechanism of Red Mud-based Adsorbent in Acidic Wastewater[J]. Conservation and Utilization of Mineral Resources, 2023, 43(1): 86-91. doi: 10.13779/j.cnki.issn1001-0076.2023.01.008

Citation:

CHI Shuyan, WANG Bohan, HUANG Dandan, ZHAO Bing. Heavy Metal Adsorption Mechanism of Red Mud-based Adsorbent in Acidic Wastewater[J]. Conservation and Utilization of Mineral Resources, 2023, 43(1): 86-91. doi: 10.13779/j.cnki.issn1001-0076.2023.01.008

Heavy Metal Adsorption Mechanism of Red Mud-based Adsorbent in Acidic Wastewater

School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, Liaoning, China

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Corresponding author: ZHAO Bing, zhaob@mail.neu.edu.cn

Received Date: 05 March 2022

Publish Date: 15 February 2023

Abstract

Abstract

The adsorption characteristics of heavy metal ions in wastewater were investigated by using red mud-based adsorbent. The adsorption mechanism of red mud-based adsorbent was investigated by means of adsorption kinetic model, adsorption isotherm, FTIR and XRD with Cu²⁺and Zn²⁺ in acidic wastewater as the target. The results showed that the adsorption process of heavy metal ions Cu²⁺ and Zn²⁺ by the red mud-based adsorbent belonged to monomolecular layer adsorption, and the maximum adsorption amounts of Cu²⁺ and Zn²⁺ by Langmuir adsorption isotherms were 33.12 mg/g and 129.88 mg/g, respectively, which were in accordance with the quasi-secondary kinetic model. The Si-O-Si in the red mud-based adsorbent interacted with Cu²⁺ and Zn²⁺ and the adsorption process was chemisorption. This study provides a new way for the recycling of solid waste red mud from aluminum industry.
- red mud /
- adsorbent /
- wastewater /
- heavy metal ions /
- adsorption kinetics /
- adsorption mechanism

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References

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