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Open AccessArticle

Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism

1
International Joint Laboratory of Hunan Agricultural Typical Pollution Restoration and Water Resources Safety Utilization, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
2
Hunan Key Laboratory of Water Pollution Control Technology, Hunan Research Academy of Environmental Sciences, Changsha 410004, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Domenico Cicchella
Water 2021, 13(6), 809; https://doi.org/10.3390/w13060809
Received: 2 February 2021 / Revised: 27 February 2021 / Accepted: 11 March 2021 / Published: 16 March 2021
The resource utilization of excess red mud produced from aluminum production is a current research focus. In this study, novel nano-Fe3O4 modified high-iron red mud material ([email protected]3O4) was fabricated using the method of co-precipitation to remove Sb(III) from the aqueous phase. The [email protected]3O4 at a nFe3O4:HRM mass ratio of 1:1 had optimal adsorbing performance on Sb(III) in water. Compared with others, the synthetic [email protected]3O4 sorbent had a superior maximum Sb(III) adsorption capacity of 98.03 mg·g−1, as calculated by the Langmuir model, and a higher specific surface area of 171.63 m2·g−1, measured using the Brunauer-Emmett-Teller measurement. The adsorption process was stable at an ambient pH range, and negligibly limited by temperature the coexisting anions, except for silicate and phosphate, suggesting the high selectivity toward Sb(III). [email protected]3O4 retained more than 60% of the initial adsorption efficiency after the fifth adsorption-desorption cycle. The kinetic data fitted by the pseudo-second-order model illustrated the existence of a chemical adsorption process in the adsorption of Sb(III). Further mechanism analysis results indicated that the complexation reaction played a major role in Sb(III) adsorption by [email protected]3O4. This [email protected]3O4 adsorbent provides an effective method for the removal of Sb(III) in wastewater treatment and is valuable in the reclamation of red mud. View Full-Text
Keywords: high-iron red mud; nano-Fe3O4; Sb(III); kinetics and isotherms; mechanism high-iron red mud; nano-Fe3O4; Sb(III); kinetics and isotherms; mechanism
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MDPI and ACS Style

Peng, Y.; Luo, L.; Luo, S.; Peng, K.; Zhou, Y.; Mao, Q.; Yang, J.; Yang, Y. Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism. Water 2021, 13, 809. https://doi.org/10.3390/w13060809

AMA Style

Peng Y, Luo L, Luo S, Peng K, Zhou Y, Mao Q, Yang J, Yang Y. Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism. Water. 2021; 13(6):809. https://doi.org/10.3390/w13060809

Chicago/Turabian Style

Peng, Yizhe; Luo, Lin; Luo, Shuang; Peng, Kejian; Zhou, Yaoyu; Mao, Qiming; Yang, Jian; Yang, Yuan. 2021. "Efficient Removal of Antimony(III) in Aqueous Phase by Nano-Fe3O4 Modified High-Iron Red Mud: Study on Its Performance and Mechanism" Water 13, no. 6: 809. https://doi.org/10.3390/w13060809

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