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Magnetochemistry
Special Issues
Application of Magnetic Fields and Magnetic Materials to Wastewater Treatment
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Application of Magnetic Fields and Magnetic Materials to Wastewater Treatment

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Applications of Magnetism and Magnetic Materials".

Deadline for manuscript submissions: closed (30 May 2023) | Viewed by 4226

Special Issue Editors

Dr. Chuanliang Zhao

E-Mail Website
Guest Editor
1. School of Civil Engineering, Chang’ an University, Xi'an 710061, Shaanxi, China
2. China State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Interests: adsorption; coagulation; magnetic materials; water treatment
Dr. Bo Hu

E-Mail Website
Co-Guest Editor
School of Civil Engineering, Chang’ an University, Xi'an, Shaanxi 710061, China
Interests: biological wastewater treatment; biological nitrogen removal; numerical simulation of biological wastewater treatment processes; intracellular electron transport
Dr. Liwei Yang

E-Mail Website
Co-Guest Editor
School of Civil Engineering, Chang’ an University, Xi'an, Shaanxi 710061, China
Interests: photocatalysis; magnetic materials; water treatment

Special Issue Information

Dear Colleagues,

In recent years, diverse approaches have been applied to improving biological wastewater treatment processes. Among them, the magnetic field, a sustainable, green, and low-cost method, has attracted significant attention for its ability to enhance these processes. However, due to the complexity of magnetic fields’ impacts, more efforts should be devoted to this topic. This Special Issue aims to publish a collection of ground-breaking research detailing the latest achievements in this field. We are particularly interested in original research articles considering one of the topics listed below:

  • Magnetic fields’ impacts on the nature of wastewater;
  • Microorganisms’ intracellular metabolism;
  • Intracellular electraon transport;
  • Magnetic fields’ influence on biological wastewater treatment processes;
  • Other relevant subjects.

Dr. Chuanliang Zhao
Guest Editor
Dr. Bo Hu
Dr. Liwei Yang
co-Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • magnetic field
  • magnetic materials
  • wastewater treatment
  • magnetic physicochemical effects
  • magnetic biologic effects
  • electron transport
  • enzyme activity
  • application
  • mechansims

Published Papers (2 papers)

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Research

15 pages, 3632 KiB  
Article
Levofloxacin Adsorption onto MWCNTs/CoFe2O4 Nanocomposites: Mechanism, and Modeling Using Non-Linear Kinetics and Isotherm Equations
by Tariq J. Al-Musawi, Yasir Qasim Almajidi, Ethar M. Al-Essa, Rosario Mireya Romero-Parra, Enas R. Alwaily, Nezamaddin Mengelizadeh, Fatemeh Ganji and Davoud Balarak
Magnetochemistry 2023, 9(1), 9; https://doi.org/10.3390/magnetochemistry9010009 - 27 Dec 2022
Cited by 13 | Viewed by 2191
Abstract
In the present work, the adsorption mechanism and capacity of MWCNTs/CoFe2O4 nanocomposite as an adsorbent were investigated. Levofloxacin (LFX), a widely used antibiotic, was selected as a hazardous model contaminant in aqueous solutions. The surface and inner characterization of MWCNTs/CoFe [...] Read more.
In the present work, the adsorption mechanism and capacity of MWCNTs/CoFe2O4 nanocomposite as an adsorbent were investigated. Levofloxacin (LFX), a widely used antibiotic, was selected as a hazardous model contaminant in aqueous solutions. The surface and inner characterization of MWCNTs/CoFe2O4 was obtained via SEM/TEM, XRD, BET/BJH, and pHPZC. These analyses indicated that MWCNTs/CoFe2O4 possess excellent surface and pore characteristics, e.g., specific surface area, pore volume, and mean pore diameter, which were 72 m2/g, 0.51 cm3/g, and 65 nm, respectively. The results demonstrate that by supplementing 1 g/L of MWCNTs/CoFe2O4 at experimental conditions of pH value of 5, temperature of 30 °C, initial LFX concentration of 50 mg/L and mixing time of 90 min, a significant outcome of 99.3% removal was achieved. To identify the phenomenon of adsorption, the thermodynamic parameters of ΔH° and ΔS° were calculated, which indicated that the nature of LFX adsorption onto MWCNTs/CoFe2O4 nanocomposite was endothermic and spontaneous. Nine isotherm models, including four two-parameter and five three-parameter models, were investigated. In addition, the regression coefficient as well as five error coefficient models were calculated for nonlinear isotherm models. According to the goodness of fit tests, the equilibrium data were well coordinated with the Freundlich and Sips isotherms. The kinetics study showed that the LFX adsorption data well fitted with pseudo-second-order model, and the adsorption of LFX molecules occurred through several stages from surface to intraparticle diffusion. In conclusion, the present work evinces that LFX wastewater can be efficiently treated via an adsorption process using a MWCNTs/CoFe2O4 nanocomposite. Full article
(This article belongs to the Special Issue Application of Magnetic Fields and Magnetic Materials to Wastewater Treatment)
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16 pages, 3561 KiB  
Article
A Sustainable Amine Magnetic Biocomposite Based on Rice Husk–Sugarcane Bagasse Fiber for Lead and Contaminant Adsorption in Aqueous Solution
by Iryanti Fatyasari Nata, Chairul Irawan, Meilana Dharma Putra, Hesti Wijayanti, Yuniza Shentya Dewi and Yenny Meliana
Magnetochemistry 2022, 8(12), 183; https://doi.org/10.3390/magnetochemistry8120183 - 9 Dec 2022
Cited by 5 | Viewed by 1523
Abstract
Biomass is a material that can be potentially used as a natural fiber resource. Rice husk (RH) and sugarcane bagasse (SB), respectively containing 36.6% and 60% cellulose, are fibers that have the potential for biocomposite formation. In this study, an amine magnetic biocomposite [...] Read more.
Biomass is a material that can be potentially used as a natural fiber resource. Rice husk (RH) and sugarcane bagasse (SB), respectively containing 36.6% and 60% cellulose, are fibers that have the potential for biocomposite formation. In this study, an amine magnetic biocomposite (B-MNH2) was prepared by a one-step solvothermal reaction. Delignified RH and SB fibers at a ratio of 1:1 were added to a mixture of ethylene glycol, iron chloride, and 1,6-hexanediamine, and kept in a stainless steel autoclave reactor at 200 °C for 6 h. The obtained B-MNH2 contained 64.5% of Fe and 2.63 mmol/g of amine. Its surface area increased significantly from 9.11 m2/g to 25.81 m2/g after amine functionalization, and its optimum adsorption for Pb(II) ions was achieved within 360 min at 596.82 mg/g and pH 5. Moreover, the pseudo-first-order mechanism fitted well to the adsorption model. Other parameters, such as chemical oxygen demand (COD), total suspended solid (TSS), and dye during adsorption were also reduced by about 67.7%, 95.6%, and 89%, respectively. B-MNH2 showed a slight decrease in performance by only 8% after the fourth repeated use. The amine magnetic biocomposite led to the development of a potential adsorbent due to the high surface area, stable material, and easy separation, and was capable of absorbing contaminants from an aqueous solution. Full article
(This article belongs to the Special Issue Application of Magnetic Fields and Magnetic Materials to Wastewater Treatment)
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