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Advances in Adsorption of Wastewater Pollutants
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Advances in Adsorption of Wastewater Pollutants

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 2243

Special Issue Editors

Dr. Marwa El-Azazy

E-Mail Website
Guest Editor
Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
Interests: wastewater treatment; biochar; nanomaterials; green adsorbents; factorial designs
Dr. Saeed Al-Meer

E-Mail Website
Guest Editor
Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
Interests: nitro-organic compounds; zeolites; catalysts; solar cells; environmental pollutants
Dr. Ahmed El-Shafie

E-Mail Website
Guest Editor
Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha 2713, Qatar
Interests: synthesis of nanomaterials; wastewater treatment; factorial design; waste recycling and management
Dr. Khalid Al-Saad

E-Mail Website
Guest Editor
Department of Chemistry and Earth Sciences, Qatar University, Doha 2713, Qatar
Interests: green adsorbents; water analysis and treatment; mass spectrometry

Special Issue Information

Dear Colleagues,

With the rapid progress of human life, innumerable pollutants are threatening aquatic systems, with water pollution becoming a critical health and environmental issue. Thus, innovative and affordable solutions that could be used to remove these pollutants are crucial.

To that end, editors of this Special Issue are focusing on the development of innovative techniques that are adsorption-based for wastewater treatment. These novel solutions could comprise the utilization of unique materials for wastewater remediation, ecostructuring of a green approach via coupling to factorial designs, or any other relevant approach. The target pollutants include (but are not confined to) organics (pharmaceutically active compounds, personal care products, dyes, pesticides, etc.) and inorganics.

This Special Issue entitled “Advances in Adsorption of Wastewater Pollutants” seeks high-quality contributions. All types of papers are welcome: research, review articles and communications. Topics include but are not limited to:

  • Synthesis and characterization of adsorbents/nanosorbents;
  • Activated carbon, biochars, and carbon-based materials for wastewater treatment;
  • Ecostructuring of novel adsorbent materials;
  • Recycling of waste materials into valuable products;
  • Application of factorial designs for wastewater remediation;
  • Depollution of emergent contaminants;
  • Removal of various contaminants from their individual and/or binary solutions;
  • Integrated adsorption–photocatalytic techniques;
  • Techno-economic analysis of adsorption-based wastewater treatment techniques.

Dr. Marwa El-Azazy
Dr. Saeed Al-Meer
Dr. Ahmed El-Shafie
Dr. Khalid Al-Saad
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. Processes 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 2400 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

  • adsorption for wastewater treatment
  • green adsorbents
  • nanosrobents
  • synthesis and characterization of sorbent materials
  • emergent contaminants
  • adsorptive removal of organics and inorganics
  • factorial designs and response surface methodology-based techniques
  • cost analysis

Published Papers (2 papers)

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Research

20 pages, 4822 KiB  
Article
Performance of Mg/Al and Zn/Al Hydroxide Double Lamellar-Bentonite for Removal of Anionic Azo Dye from Aqueous Solution
by Mohammed Mustapha Bouhent, Kahina Bentaleb, Abdulrahman Al-Ameri and Ulrich Maschke
Processes 2024, 12(4), 677; https://doi.org/10.3390/pr12040677 - 28 Mar 2024
Viewed by 874
Abstract
This paper presents the preparation and characterization of bentonite coated with hydroxide double lamellar Mg/Al-bentonite and Zn/Al-bentonite as a potential adsorbent material. The coating process involved co-precipitation of mixed metal nitrate solution (Mg-Al) or (Zn-Al), followed by immersion of bentonite (B-Na+) [...] Read more.
This paper presents the preparation and characterization of bentonite coated with hydroxide double lamellar Mg/Al-bentonite and Zn/Al-bentonite as a potential adsorbent material. The coating process involved co-precipitation of mixed metal nitrate solution (Mg-Al) or (Zn-Al), followed by immersion of bentonite (B-Na+) dispersion. The structures and morphologies of the coated bentonites were characterized using XRD, FTIR, BET, and SEM analysis. The results of the BET analysis indicate that Mg/Al-bentonite and Zn/Al-bentonite have larger surface areas and pore volumes compared to bentonite alone. Specifically, the surface area of Mg/Al-bentonite is 209.25 m2/g with a pore volume of 0.423 cm3/g, while Zn/Al-bentonite has a surface area of 175.95 m2/g and a pore volume of 0.313 cm3/g. In contrast, the surface area and pore volume of bentonite alone are 110.43 m2/g and 0.132 cm3/g, respectively. The Mg/Al-bentonite reaches 85% uptake within 3 h (equivalent to 724.20 mg/g at 25 °C and pH 7), achieving rapid equilibrium. In contrast, the Zn/Al-bentonite achieves a maximum adsorption of 74% within 5 h under identical pH and temperature conditions, corresponding to 650.34 mg/g. The error function values, including the correlation coefficient R2, chi-square test χ2, and residual sum of squares RSS, were calculated to evaluate both kinetic and isotherm models. The kinetic adsorption data agreed well with a pseudo-second-order model. The adsorption process followed the Sips isotherm model, and the monolayer adsorption capacity of Mg/Al-bent and Zn/Al-bent composites was 872.41 (R2 = 0.974) and 678.45 mg/g (R2 = 0.983), respectively. The thermodynamic analysis of the adsorption process revealed that it occurred spontaneously with an endothermic characteristic. The parameters ΔS, ΔH, and ΔG were used to determine this. Full article
(This article belongs to the Special Issue Advances in Adsorption of Wastewater Pollutants)
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17 pages, 2998 KiB  
Article
Modelling and Optimization of Methylene Blue Adsorption Process on Leonurus cardiaca L. Biomass Powder
by Giannin Mosoarca, Simona Popa, Cosmin Vancea, Mircea Dan and Sorina Boran
Processes 2023, 11(12), 3385; https://doi.org/10.3390/pr11123385 - 6 Dec 2023
Cited by 1 | Viewed by 978
Abstract
The main objective of this study was to optimize the adsorption process of methylene blue on a natural, low-cost adsorbent, Leonurus cardiaca L. biomass powder, in order to maximize dye removal efficiency from aqueous solutions. For this purpose, the Taguchi method was used [...] Read more.
The main objective of this study was to optimize the adsorption process of methylene blue on a natural, low-cost adsorbent, Leonurus cardiaca L. biomass powder, in order to maximize dye removal efficiency from aqueous solutions. For this purpose, the Taguchi method was used based on an L27 orthogonal array design considering six controllable factors at three levels. The percentage contribution of each factor was computed using analysis of variance (ANOVA). The optimal adsorption conditions were established. The experimental data from equilibrium and kinetic studies were modelled using specific equilibrium isotherms and kinetic models. Thermodynamic parameters were calculated in order to determine the main adsorption mechanism. The obtained results showed that the ionic strength is the factor that most influences dye adsorption (percentage contribution 72.33%), whereas the adsorbent dose had the least impact. The Sips isotherm and the general kinetic model most accurately characterized the process. The maximum adsorption capacity 103.21 (mg g−1) indicated by the Sips isotherm and the equilibrium time (40 min) were better compared to the values obtained for other bio-adsorbents used for methylene blue adsorption. The main mechanism involved in the adsorption is physisorption, while chemisorption only contributes marginally to the process. Full article
(This article belongs to the Special Issue Advances in Adsorption of Wastewater Pollutants)
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