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Advanced Adsorbent-Based Technologies for Efficient Wastewater Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: 30 October 2025 | Viewed by 583

Special Issue Editor


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Guest Editor
Department of Soil, Water, and Ecosystem Sciences, Everglades Research and Education Center, University of Florida, Belle Glade, FL 33430, USA
Interests: biochar; water treatment; adsorption; constructed wetlands; activated carbon; water; water quality

Special Issue Information

Dear Colleagues,

Wastewater treatment is crucial in maintaining environmental sustainability and ensuring clean water resources. With increasing industrialization and urbanization, the demand for advanced, efficient, and cost-effective wastewater treatment technologies has grown significantly. Conventional treatment methods often face challenges such as high energy consumption, incomplete pollutant removal, and secondary waste generation.

Recent advancements in wastewater treatment focus on innovative physical, chemical, and biological processes to enhance efficiency, minimize environmental impact, and recover valuable resources. Among these, adsorbent-based technologies have gained considerable attention due to their high removal efficiency, versatility, and potential for resource recovery. Developing novel adsorbents, including nanomaterials, functionalized porous materials, bio-based adsorbents, and hybrid composites, has significantly improved the removal of organic and inorganic pollutants, heavy metals, and emerging contaminants. Understanding adsorption mechanisms, modifying materials to enhance adsorbent performance, optimizing usage conditions, and evaluating practical applicability in real-world scenarios are essential for advancing these adsorbent-based technologies.

This Special Issue of Water aims to provide a platform for the publication of innovative and original research on adsorbent-based wastewater treatment technologies. Topics of interest include the design and synthesis of novel adsorbents, adsorption mechanisms, regeneration and reusability strategies, and the practical implementation of adsorption technologies in wastewater treatment. The development and application of these advanced approaches will contribute to sustainable water management and environmental protection.

Dr. Yicheng Yang
Guest Editor

Manuscript Submission Information

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Keywords

  • adsorption-based technologies
  • adsorbents
  • wastewater treatment
  • nanomaterials
  • emerging contaminants
  • regeneration and reusability

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Published Papers (1 paper)

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Research

18 pages, 2834 KiB  
Article
Fabrication of Silver-Incorporated Zn-Al Layered Double Hydroxide: Characterization and Bromide-Adsorption Performance
by Aiman Eid Al-Rawajfeh, Albara Ibrahim Alrawashdeh, Mohammad Taha Etiwi, Bandita Mainali, Muhammad Kashif Shahid, Hosam Al-Itawi, Ehab Al-Shamaileh, Mariam Al-E’bayat and Al Al-Sahary
Water 2025, 17(11), 1578; https://doi.org/10.3390/w17111578 - 23 May 2025
Viewed by 456
Abstract
In this study, a novel adsorbent was developed by synthesizing Zn-Al layered double hydroxide (LDH) incorporated with silver nanoparticles (Ag-NPs), and its effectiveness in bromide removal from aqueous solutions was systematically evaluated. The X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) analyses [...] Read more.
In this study, a novel adsorbent was developed by synthesizing Zn-Al layered double hydroxide (LDH) incorporated with silver nanoparticles (Ag-NPs), and its effectiveness in bromide removal from aqueous solutions was systematically evaluated. The X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) analyses confirmed the integration of Ag-NPs within the LDH, ensuring uniform chemical composition and structural integrity. A series of controlled batch trials, each varying a single parameter (adsorbent dose, contact time, or temperature) confirmed that over 95% of bromide (initially 5320 μg/L) was removed under optimized conditions. LDH/Ag-NPs exhibited superior performance, with kinetics well described by a second-order reaction model. Thermodynamic analysis confirmed the spontaneous and exothermic nature of bromide adsorption, with ΔG° values ranging from −2.03 to −0.73 kJ/mol as the temperature increased from 22 °C to 52 °C. In continuous-flow experiments, packed-bed column tests illustrated that LDH/Ag-NPs maintained more effective bromide removal than LDH alone over extended periods. Conductivity measurements further supported this enhancement, with LDH/Ag-NPs reducing final conductivity to 139 µS/cm, compared to 212 µS/cm for LDH. Furthermore, this study revealed the notable antimicrobial activity of LDH/Ag-NPs, as evidenced by a significant reduction in bacterial growth compared to LDH alone, highlighting its dual functionality for both bromide adsorption and water disinfection. Overall, the incorporation of Ag-NPs into LDH offers a promising strategy for developing multifunctional and sustainable water treatment systems. Full article
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