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Molecules
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Advancements in Adsorbent Materials for Water Purification
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Advancements in Adsorbent Materials for Water Purification

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (30 April 2025) | Viewed by 3472

Special Issue Editors

Dr. Mohammadtaghi Vakili

E-Mail Website
Guest Editor
ORLEN UniCRE, a.s., Revoluční 1521/84, 400 01 Ústí nad Labem, Czech Republic
Interests: wastewater treatment; adsorption; adsorbents
Dr. Giovanni Cagnetta

E-Mail Website
Co-Guest Editor
State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
Interests: sustainable materials; mechanochemistry; wastewater treatment; emerging contaminants

Special Issue Information

Dear Colleagues,

I am delighted to extend to you an invitation to contribute your scholarly endeavors to a Special Issue of Molecules, entitled “Advancements in Adsorbent Materials for Water Purification”.

In recent years, the availability of clean water has faced significant challenges due to industrial expansion and population growth, resulting in an increase in pollutants such as dyes, heavy metals, pharmaceuticals, antibiotics, per- and poly-fluoroalkyl substances (PFASs), and microplastics in aquatic environments. To address this pressing issue, an adsorption process using effective adsorbent materials has emerged as a promising solution for water treatment. The role of adsorbents and their properties is crucial in determining the efficiency and effectiveness of this adsorption process.

The aim of this Special Issue is to gather the latest research regarding the synthesis, preparation, and application of various adsorbent materials for the removal of these pollutants from water. We welcome contributions exploring the mechanisms of adsorption, thermodynamic considerations, isotherm modeling, kinetic assessments, and strategies for adsorbent regeneration. We invite original research articles, comprehensive review papers, and concise communications that contribute to our understanding of adsorption processes for water purification. By providing a platform for scholarly exchange, we aim to advance knowledge and foster collaboration in this important field of research.

We eagerly anticipate your contributions to this Special Issue.

Dr. Mohammadtaghi Vakili
Dr. Giovanni Cagnetta
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. Molecules is an international peer-reviewed open access semimonthly 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

  • water and wastewater treatment
  • organic and inorganic contaminants
  • adsorption mechanisms
  • novel adsorbent materials
  • adsorbent synthesis and characterization
  • adsorbent regeneration
  • adsorption isotherms
  • adsorption kinetics

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

16 pages, 5917 KiB  
Article
Optimization of Magnetic Biochar Preparation Process, Based on Methylene Blue Adsorption
by Bin Liu, Yixuan Wu, Zebing Xing, Ji Zhang and Yuxin Xue
Molecules 2024, 29(21), 5213; https://doi.org/10.3390/molecules29215213 - 4 Nov 2024
Viewed by 1619
Abstract
The search for low-cost and effective adsorbents for the removal of organic dyes from contaminated water is urgently needed. The substantial amount of waste mushroom cultivation substrates generated in practical production can serve as an ideal material for the preparation of adsorbents. In [...] Read more.
The search for low-cost and effective adsorbents for the removal of organic dyes from contaminated water is urgently needed. The substantial amount of waste mushroom cultivation substrates generated in practical production can serve as an ideal material for the preparation of adsorbents. In this study, we investigated the main control parameters affecting the performance of magnetic mushroom substrate biochar and optimized the process of preparing biochar by using the Plackett–Burman and central composite design methods. Various analytical techniques including SEM, EDX, BET, and VSM were used to characterize the biochar. The results indicate that the carbonization temperature had the most significant impact on the yield and adsorption performance of biochar. Under the conditions of a carbonization temperature of 600 °C, a carbonization retention time of 1 h, and an impregnation ratio of 0.1, the yield and methylene blue adsorption value of magnetic biochar were 42.54% and 2297.04 μg/g, respectively, with a specific surface area of 37.17 m2/g. This biochar effectively removed methylene blue from the solution, demonstrating a high economic efficiency for wastewater treatment and pollution control. Furthermore, the adsorption–desorption cycle studies revealed its excellent stability and reusability. Additionally, based on the response surface methodology, a three-dimensional surface model of the adsorption performance of magnetic biochar under different carbonization conditions was established, providing a theoretical basis for the preparation of magnetic biochar from agricultural wastes. Full article
(This article belongs to the Special Issue Advancements in Adsorbent Materials for Water Purification)
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16 pages, 6042 KiB  
Article
Removal of Pb(II) and Cd(II) from a Monometallic Contaminated Solution by Modified Biochar-Immobilized Bacterial Microspheres
by Zaiquan Li, Xu Xiao, Tao Xu, Shiyu Chu, Hui Wang and Ke Jiang
Molecules 2024, 29(19), 4757; https://doi.org/10.3390/molecules29194757 - 8 Oct 2024
Cited by 1 | Viewed by 1296
Abstract
Lead (Pb) and cadmium (Cd) are toxic pollutants that are prevalent in wastewater and pose a serious threat to the natural environment. In this study, a new immobilized bacterial microsphere (CYB-SA) was prepared from corn stalk biochar and Klebsiella grimontii by sodium alginate [...] Read more.
Lead (Pb) and cadmium (Cd) are toxic pollutants that are prevalent in wastewater and pose a serious threat to the natural environment. In this study, a new immobilized bacterial microsphere (CYB-SA) was prepared from corn stalk biochar and Klebsiella grimontii by sodium alginate encapsulation and vacuum freeze-drying technology. The removal effect of CYB-SA on Pb(II) and Cd(II) in a monometallic contaminated solution was studied. The results showed that the removal of Pb(II) and Cd(II) by CYB-SA was 99.14% and 83.35% at a dosage of 2.0 g/L and pH = 7, respectively, which was 10.77% and 18.58% higher than that of biochar alone. According to the Langmuir isotherm model, the maximum adsorption capacities of Pb(II) and Cd(II) by CYB-SA at 40 °C were 278.69 mg/g and 71.75 mg/g, respectively. A combination of the kinetic model, the isothermal adsorption model, scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM-EDS), X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) analyses showed that the main adsorption mechanisms of CYB-SA encompass functional group complexation, ion exchange, electrostatic attraction and physical adsorption. The findings of this study offer practical and theoretical insights into the development of highly efficient adsorbents for heavy metals. Full article
(This article belongs to the Special Issue Advancements in Adsorbent Materials for Water Purification)
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