Polyurethane sponge loading improves the suspension of magnetic materials without affecting the Pb(Ⅱ) adsorption
Polyurethane sponge loading improves the suspension of magnetic materials without affecting the Pb(Ⅱ) adsorption
Magnetic adsorbents are promising for wastewater treatment due to their easy separation with a magnetic field for recycling. This study aims to develop a novel magnetic adsorbent to further simplify the separation of magnetic adsorbents after adsorption to reduce operating costs for magnetic separation process. Thus, a lightweight sponge, magnetic hydroxyapatite modified polyurethane sponge (MPPS), was synthesized for Pb2+ adsorption by combining polyurethane sponge with magnetic hydroxyapatite (MP). The density of MP was about 4.23 g/cm3, while MPPS was only 0.46 g/cm3. As such, MP can float under the water surface, which is beneficial to the separation and Pb2+ adsorption in solutions. Meanwhile, the loading rate of MP on MPPS can reach 37.5%, and the loading process had no obvious effect on the physical and chemical properties of MP. Through experiments and characterization, MPPS had 60.46 mg/g adsorption capacity for Pb2+ in the solution with a pH of 5, and the adsorption was identified as a mainly homogeneous and exothermic process. Moreover, the adsorption of Pb2+ by MPPS was mainly due to the electrostatic interaction and ion exchange, accounting for 51.60% and 24.31% of the total adsorption, respectively. This study developed a lightweight magnetic sponge, which could be easier used in the magnetic separation process than conventional magnetic materials.
heavy metal, hydroxyapatite, lightweight magnetic adsorbents, magnetic separation process, polymeric sponge
Li, Ruifeng
52d5e71b-5b46-4eb5-b563-5046b8936560
Lan, Guihong
fd98a25b-e8f1-4a24-a163-a73f2048b130
Liu, Yongqiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Sun, Qiao
0aca0484-8c58-42ed-84fe-2ae405bf60ce
Luo, Bin
885ff171-5513-454f-b0c4-083fb8694dae
Zhang, Ming
edeebb0b-cfae-4db1-a919-4c4e5fdae724
Qiu, Haiyan
3399d1bc-06e4-426b-afa4-973cabaf5b2a
Xu, Bo
8bb0f7b7-2563-4623-a6d4-ffb7d8ff52b7
Deng, Chunping
d33a37b4-3240-4649-88ca-a0647fba0e4e
3 July 2023
Li, Ruifeng
52d5e71b-5b46-4eb5-b563-5046b8936560
Lan, Guihong
fd98a25b-e8f1-4a24-a163-a73f2048b130
Liu, Yongqiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Sun, Qiao
0aca0484-8c58-42ed-84fe-2ae405bf60ce
Luo, Bin
885ff171-5513-454f-b0c4-083fb8694dae
Zhang, Ming
edeebb0b-cfae-4db1-a919-4c4e5fdae724
Qiu, Haiyan
3399d1bc-06e4-426b-afa4-973cabaf5b2a
Xu, Bo
8bb0f7b7-2563-4623-a6d4-ffb7d8ff52b7
Deng, Chunping
d33a37b4-3240-4649-88ca-a0647fba0e4e
Li, Ruifeng, Lan, Guihong, Liu, Yongqiang, Sun, Qiao, Luo, Bin, Zhang, Ming, Qiu, Haiyan, Xu, Bo and Deng, Chunping
(2023)
Polyurethane sponge loading improves the suspension of magnetic materials without affecting the Pb(Ⅱ) adsorption.
Journal of Environmental Chemical Engineering, 11 (5), [110475].
(doi:10.1016/j.jece.2023.110475).
Abstract
Magnetic adsorbents are promising for wastewater treatment due to their easy separation with a magnetic field for recycling. This study aims to develop a novel magnetic adsorbent to further simplify the separation of magnetic adsorbents after adsorption to reduce operating costs for magnetic separation process. Thus, a lightweight sponge, magnetic hydroxyapatite modified polyurethane sponge (MPPS), was synthesized for Pb2+ adsorption by combining polyurethane sponge with magnetic hydroxyapatite (MP). The density of MP was about 4.23 g/cm3, while MPPS was only 0.46 g/cm3. As such, MP can float under the water surface, which is beneficial to the separation and Pb2+ adsorption in solutions. Meanwhile, the loading rate of MP on MPPS can reach 37.5%, and the loading process had no obvious effect on the physical and chemical properties of MP. Through experiments and characterization, MPPS had 60.46 mg/g adsorption capacity for Pb2+ in the solution with a pH of 5, and the adsorption was identified as a mainly homogeneous and exothermic process. Moreover, the adsorption of Pb2+ by MPPS was mainly due to the electrostatic interaction and ion exchange, accounting for 51.60% and 24.31% of the total adsorption, respectively. This study developed a lightweight magnetic sponge, which could be easier used in the magnetic separation process than conventional magnetic materials.
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Accepted/In Press date: 28 June 2023
e-pub ahead of print date: 30 June 2023
Published date: 3 July 2023
Additional Information:
Funding Information:
The study is supported by Sichuan Science and Technology Program (2019YJ0514). The authors would like to thank Shiyanjia Lab (www.shiyanjia.com) and the Analytical & Testing Center, Sichuan University, P. R. China. The authors would also like to thank the editor for handling this article and the constructive reviews of anonymous reviewers.
Keywords:
heavy metal, hydroxyapatite, lightweight magnetic adsorbents, magnetic separation process, polymeric sponge
Identifiers
Local EPrints ID: 479776
URI: http://eprints.soton.ac.uk/id/eprint/479776
ISSN: 2213-3437
PURE UUID: 349acec4-bd72-4a17-8075-b21e28a0cbce
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Date deposited: 26 Jul 2023 17:00
Last modified: 17 Mar 2024 03:32
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Contributors
Author:
Ruifeng Li
Author:
Guihong Lan
Author:
Qiao Sun
Author:
Bin Luo
Author:
Ming Zhang
Author:
Haiyan Qiu
Author:
Bo Xu
Author:
Chunping Deng
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