Special Issue "Resource Recovery Monitoring and Circular Economy Model in Wastewater"

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

Deadline for manuscript submissions: 10 November 2023 | Viewed by 430

Special Issue Editors

Institute of Environmental Engineering, Kaunas University of Technology, Kaunas, Lithuania
Interests: chemical risk management; waste; water resources management; environmental impact; circular economy
Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Cracow, Poland
Interests: green deal strategies; circular economy; raw materials; water and wastewater; nutrients; roadmaps; policy recommendations; indicators; life cycle assessment (LCA); sustainable development goals
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Special Issue Information

Dear Colleagues,

Wastewater has long been viewed as waste that simply needs to be treated in order to be released into the environment as clean water. However, wastewater, similarly to solid waste, is a source of various secondary resources and therefore can and should become part of the circular economy.

This Special Issue is dedicated to discussing ways and opportunities for wastewater to "participate" in the circular economy. How many and what kind of resources, material and energetic, are recovered? What is the recovery potential? What solutions and technologies are already used in practice (i.e., do you have any case studies that could be analyzed and presented?), and what is still being developed and tested? Papers concerning how to monitor resource recovery from wastewater or sewage sludge, e.g., developing and applying indicators for CE in the water and wastewater sectors, are particularly of interest.

These topics deserve increased attention from researchers and practitioners. The legal framework is also evolving, and incentives for resource recovery are being created. Thus, papers on the mentioned topics are welcome to this Special Issue.

Prof. Dr. Jolita Kruopienė
Prof. Dr. Marzena Smol
Guest Editors

Manuscript Submission Information

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  • circular economy
  • wastewater sector
  • indicators
  • resources from wastewater
  • resources from sewage sludge
  • resource recovery
  • monitoring framework
  • sustainability

Published Papers (1 paper)

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Ammonium Recovery from Synthetic Wastewaters by Using Zeolitic Mixtures: A Desorption Batch-Study
Water 2023, 15(19), 3479; https://doi.org/10.3390/w15193479 - 03 Oct 2023
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Resource recovery from wastewater is very important in view of a circular economy approach in the water field. Among the different technologies applied to realize circular economy, an attractive option is the use of nutrient-enriched media that can be utilized as slow-release fertilizers. [...] Read more.
Resource recovery from wastewater is very important in view of a circular economy approach in the water field. Among the different technologies applied to realize circular economy, an attractive option is the use of nutrient-enriched media that can be utilized as slow-release fertilizers. Zeolites have been re-discovered for their key role in ammonium (NH4+) adsorption from treated wastewater. Although many studies have been carried out to assess the ability of zeolites to adsorb NH4+, only few papers concerning NH4+ desorption from zeolites are available in the literature. Therefore, this study investigated NH4+ desorption from mineralogically different zeolites, before (ZNS and ZNC) and after (ZSS and ZSC) their treatment with sodium chloride. The zeolites differed in mordenite content. The amount of the desorbed NH4+ varied from 78 to 84% of the total NH4+ adsorbed. In particular, the NaCl-treated materials showed the largest desorption (27.6 ± 0.2 mg L−1, and 27.9 ± 0.7 mg L−1, ZSS, and ZSC, respectively) as compared to the untreated zeolites (22.9 ± 0.3 mg L−1, and 24.2 ± 0.3 mg L−1, ZNS, and ZNC, respectively) because of the different affinity of the cations for the zeolite surface. A monomodal pseudo-first-order model best approximated the desorption kinetics, suggesting only one mechanism of NH4+ desorption from zeolites. Such a mechanism is based on the ion exchange between dissolved Na+ and adsorbed NH4+. The desorption kinetics also showed that NH4+ desorbed slower from the NaCl-treated zeolites than the untreated ones. This effect was explained by the different affinity of Na+ and NH4+ for the zeolite surfaces as due to the diverse sizes of the Na+ and NH4+ hydration spheres. By revealing the effect of zeolite mineralogy and surface treatments in the desorption of NH4+, this study can suggest new and effective synthetic strategies for the achievement of cheap new materials to be applied in environmental remediation within a circular economy perspective. Full article
(This article belongs to the Special Issue Resource Recovery Monitoring and Circular Economy Model in Wastewater)
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