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Advances in Metal Removal and Recovery from Water
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Advances in Metal Removal and Recovery from Water

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

Deadline for manuscript submissions: 20 December 2025 | Viewed by 971

Special Issue Editor

Dr. Xiande Xie

E-Mail Website
Guest Editor
College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
Interests: wastewater treatment; metal removal; metal recovery; heavy metals pollutants; advanced oxidation technology; adsorption; coprecipitate; environment transport; transformation and fate of emerging contaminants of agricultural origin
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The metal pollution caused by natural resources and intensified human activities has led to severe problems for human and environmental health. In addition to the removal of easily mobile and toxic metal cations, the reuse of metal resources from water/wastewater has become increasingly important, particularly in the attempt to achieve economic and environmental sustainability. Therefore, it is imperative to perform scientific research to identify appropriate solutions to resolve the problem of finding methods that provide the efficient removal and recovery of metals from water/wastewater.

This Special Issue focuses on the use of wastewater treatment methods that effectively remove metal pollutants from wastewater as well as resource recovery. Original research papers of high scientific quality as well as review articles are welcome. Manuscripts can cover, but are not limited to, the following topics:

  • Efficient treatment of toxic metals from water.
  • The developments of economic and environmental separation technologies for the recovery of metal resources in water.
  • New methods for the removal and recovery of metals from water/wastewater.
  • Potential trends and challenges in the mechanism of metal removal and in recovery strategies.

Dr. Xiande Xie
Guest Editor

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. Water 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 2600 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

  • wastewater treatment
  • water treatment
  • metal pollution removal
  • metal recovery
  • absorption
  • heavy metal

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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

15 pages, 1787 KiB  
Article
Flow Regime Impacts on Chemical Pollution in the Water and Sediments of the Moopetsi River and Human Health Risk in South Africa
by Abraham Addo-Bediako, Thato Matita and Wilmien Luus-Powell
Water 2025, 17(15), 2200; https://doi.org/10.3390/w17152200 - 23 Jul 2025
Viewed by 241
Abstract
Many effluents from human activities discharged into freshwater ecosystems cause chemical pollution. Chemical pollution in rivers is a serious threat to freshwater ecosystems due to the associated potential human health risks. This study determined the extent of chemical pollution, identified potential sources of [...] Read more.
Many effluents from human activities discharged into freshwater ecosystems cause chemical pollution. Chemical pollution in rivers is a serious threat to freshwater ecosystems due to the associated potential human health risks. This study determined the extent of chemical pollution, identified potential sources of pollution and assessed human health risk in the Moopetsi River, an intermittent river in the Limpopo Province of South Africa. Chemical analyses were conducted on water and sediment samples collected during high-flow, low-flow and intermittent-flow regimes. The findings showed seasonal variations in the chemical pollution levels in the sediments and the highest contamination was measured during intermittent flow. The enrichment factor and geoaccumulation index values identified chromium and nickel as major contributors to sediment contamination. The mean arsenic, chromium and nickel levels exceeded the established guideline values. An evaluation of human health risk was conducted using ingestion and dermal absorption pathways. The results showed that ingestion has greater non-carcinogenic and carcinogenic risks than dermal exposure, especially for children during intermittent flow. The elements of great concern for non-carcinogenic risk were chromium, manganese and nickel and for carcinogenic risk, they were arsenic, chromium, nickel and lead. The outcome of this study is useful for waste management and conservation to reduce environmental degradation and human health risk. Full article
(This article belongs to the Special Issue Advances in Metal Removal and Recovery from Water)
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20 pages, 2143 KiB  
Article
Bioadsorption of Manganese with Modified Orange Peel in Aqueous Solution: Box–Behnken Design Optimization and Adsorption Isotherm
by Liz Marzano-Vasquez, Giselle Torres-López, Máximo Baca-Neglia, Wilmer Chávez-Sánchez, Roberto Solís-Farfán, José Curay-Tribeño, César Rodríguez-Aburto, Alex Vallejos-Zuta, Jesús Vara-Sanchez, César Madueño-Sulca, Cecilia Rios-Varillas de Oscanoa and Alex Pilco-Nuñez
Water 2025, 17(14), 2152; https://doi.org/10.3390/w17142152 - 19 Jul 2025
Viewed by 426
Abstract
Chemically demethoxylated and Ca-cross-linked orange-peel waste was engineered as a biosorbent for Mn(II) removal from water. A three-factor Box–Behnken design (biosorbent dose 3–10 g L−1, initial Mn2+ 100–300 mg L−1, contact time 3–8 h; pH 5.5 ± 0.1, [...] Read more.
Chemically demethoxylated and Ca-cross-linked orange-peel waste was engineered as a biosorbent for Mn(II) removal from water. A three-factor Box–Behnken design (biosorbent dose 3–10 g L−1, initial Mn2+ 100–300 mg L−1, contact time 3–8 h; pH 5.5 ± 0.1, 25 °C) required only 16 runs to locate the optimum (10 g L−1, 100 mg L−1, 8 h), at which the material removed 94.8% ± 0.3% manganese removal under the optimized conditions (10 g L−1, 100 mg L−1, 8 h, pH 5.5) of dissolved manganese and reached a Langmuir capacity of 29.7 mg g−1. Equilibrium data fitted the Freundlich (R2 = 0.968) and Sips (R2 = 0.969) models best, indicating a heterogeneous surface, whereas kinetic screening confirmed equilibrium within 6 h. FTIR and SEM–EDX verified abundant surface –COO−/–OH groups and showed Mn deposits that partially replaced residual Ca, supporting an ion-exchange component in the uptake mechanism. A preliminary cost analysis (<USD 10 kg−1) and > 90% regeneration efficiency over three cycles highlight the economic and environmental promise of this modified agro-waste for polishing Mn-laden effluents. Full article
(This article belongs to the Special Issue Advances in Metal Removal and Recovery from Water)
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