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Xiao D, Jiang H, Zhou Y, Imran A, Zhao H, Bi Y. Preparation of smart magnetic fluids and application in sewage treatment: Copper adsorption, kinetic and isotherm study. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 353:120142. [PMID: 38306855 DOI: 10.1016/j.jenvman.2024.120142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 12/28/2023] [Accepted: 01/15/2024] [Indexed: 02/04/2024]
Abstract
The effective removal of heavy metal ions from sewage remains a critical issue, and applying the operability of magnetic materials to large volume wastewater treatment has been a significant challenge. In this paper, metal ions adsorption induced aggregation strategy is proposed to solve this contradiction. The intelligent magnetic fluid designed in this study is a well-dispersed fluid state when treating sewage, and can efficiently adsorb heavy metal ions in wastewater with high adsorption capacity and ultra-fast adsorption kinetics. More importantly, after saturation of adsorption, the magnetic fluid will transform from a well-dispersed fluid state to an agglomeration state which is easy to precipitate and separate via external magnetic field. In a simple and effective way, the particles size of magnetic nanoparticles was precisely controlled by cellulose derivatives modification to obtain a stable magnetic fluid in water. The Freundlich model best described Cu2+ adsorption on magnetite nanoparticles, the correlation coefficients from the Cu2+ adsorption on the two magnetic fluids are 0.9554 and 0.9336, n are 1.868 and 2.117, revealing a favorable adsorption of Cu2+ onto magnetic fluids. The pseudo second-order model fitted the adsorption kinetic data better, the qe are 0.1948 and 0.1315 mmol/g and the R2 are 0.9999, indicating that the adsorption of Cu2+ onto the magnetic fluid was dominated by chemisorption. Moreover, the removal rate of Cu2+ in tap water and lake water was more than 97.1%, and the removal rate of large volume sewage was 81.7%. The synthetic magnetic fluid has high adsorption capacity, ultra-fast adsorption kinetics, reusability and easy separation, indicating its potential application for the removal of heavy metal ions from large-volume sewage.
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Affiliation(s)
- Deli Xiao
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, 210009, China; Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, 24 Tongjia Lane, Nanjing, 210009, China; Key Laboratory of Biomedical Functional Materials, China Pharmaceutical University, Nanjing, 210009, China
| | - Hui Jiang
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, 210009, China
| | - Yunlin Zhou
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, 210009, China
| | - Alhassan Imran
- Department of Analytical Chemistry, China Pharmaceutical University, Nanjing, 210009, China
| | - Hongyan Zhao
- Department of Hygienic Analysis and Detection, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 210009, China.
| | - Yanping Bi
- School of Pharmaceutical Sciences, Shandong First Medical University, Tai'An, Shandong, 271016, China.
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Pascu G, Bunoiu OM, Bica I. Magnetic Field Effects Induced in Electrical Devices Based on Cotton Fiber Composites, Carbonyl Iron Microparticles and Barium Titanate Nanoparticles. NANOMATERIALS 2022; 12:nano12050888. [PMID: 35269376 PMCID: PMC8912619 DOI: 10.3390/nano12050888] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 02/28/2022] [Accepted: 03/03/2022] [Indexed: 12/22/2022]
Abstract
This work consists in the process of preparing magnetic active composite materials based on cotton fibers, iron carbonyl microparticles and barium titanate nanoparticles, and the electrical devices manufactured with them. For different compositions of the aforementioned ingredients, three such composites are manufactured and compacted at constant pressure between two electrodes. In the absence and in the presence of a magnetic field, using an RLC bridge, magnetocapacitive, magnetoresistive and magnetopiezoelectric effects are highlighted in the custom fabricated devices. It is shown that these effects are significantly influenced by the composition of the materials. Based on the model elaborated in this paper, the mechanisms that contribute to the observed effects are described and the theoretical predictions are shown to agree with the experimental data. The obtained results can be used in the assembly of hybrid magnetic active composites, which are low cost, ecological and have other useful physical characteristics for applications.
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Affiliation(s)
- Gabriel Pascu
- Faculty of Physics, West University of Timisoara, 4 V. Parvan Avenue, 300223 Timisoara, Romania; (G.P.); (I.B.)
- Institute of Advanced Environmental Research, West University of Timisoara, 4 V. Parvan Avenue, 300223 Timisoara, Romania
| | - Octavian Madalin Bunoiu
- Faculty of Physics, West University of Timisoara, 4 V. Parvan Avenue, 300223 Timisoara, Romania; (G.P.); (I.B.)
- Institute of Advanced Environmental Research, West University of Timisoara, 4 V. Parvan Avenue, 300223 Timisoara, Romania
- Correspondence:
| | - Ioan Bica
- Faculty of Physics, West University of Timisoara, 4 V. Parvan Avenue, 300223 Timisoara, Romania; (G.P.); (I.B.)
- Institute of Advanced Environmental Research, West University of Timisoara, 4 V. Parvan Avenue, 300223 Timisoara, Romania
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