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Water as a Strategic Resource—The Resilience of Water and Wastewater Systems Under Crisis Conditions and the Implementation of EU Directives

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

Deadline for manuscript submissions: 30 September 2026 | Viewed by 1302

Special Issue Editors


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Guest Editor
Department of Water and Wastewater Engineering, Faculty of Energy and Environmental Engineering, Silesian University of Technology, Gliwice, Poland
Interests: drinking water; water safety plans; risk assessment; reliability of water and wastewater systems

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Co-Guest Editor
Department of Thermal Engineering and Industrial Facilities, Faculty of Mechanical Engineering, Opole University of Technology, Opole, Poland
Interests: water; water treatment; water technology; drinking water

Special Issue Information

Dear Colleagues,

This Special Issue aims to address the latest scientific and practical developments in the field of drinking water treatment and supply systems, with a particular focus on the implementation of the revised EU Drinking Water Directive (2020/2184) and the newly adopted Urban Wastewater Treatment Directive (2024/3019). This issue will bring together contributions from academic researchers, water industry professionals, and public authorities to explore innovative approaches, policy implications, and real-world case studies related to water quality, infrastructure management, and regulatory compliance. Key themes include the following:

  1. Innovative Water Treatment Technologies

Advances in membrane filtration, adsorption, enhanced coagulation, advanced oxidation, and hybrid methods for the effective removal of emerging contaminants, including PFAS, pharmaceuticals, heavy metals, and microplastics.

  1. Digitalisation and Smart Water Networks

Development and application of smart sensors, real-time monitoring, hydraulic modelling, leakage detection systems, and cyber–physical integration to enhance operational efficiency and data-driven decision-making.

  1. Crisis Resilience and Risk Adaptation

Evaluation of water and wastewater systems’ resilience to extreme weather events, blackouts, and other infrastructure disruptions, with an emphasis on climate adaptation strategies.

  1. Risk-Based Management and Regulatory Compliance

Implementation of Water Safety Plans, development of proactive risk assessment and monitoring tools, and harmonisation with EU regulatory frameworks, particularly under the DWD and UWWTD.

  1. Energy–Water Nexus and Climate Neutrality

Synergies between water services and energy transition goals, including adoption of low-carbon technologies, circular economy solutions, and alignment with national and EU decarbonisation targets.

This Special Issue invites high-quality original research, technical notes, and review papers that contribute to a better understanding and improved performance of water systems in the context of modern regulatory, environmental, and technological challenges.

Prof. Dr. Izabela Zimoch 
Guest Editor

Prof. Dr. Iwona Kłosok-Bazan
Co-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 250 words) can be sent to the Editorial Office for assessment.

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

  • risk management
  • drinking water and wastewater quality
  • energy-water nexus
  • smart water networks and technology
  • microcontaminants removal

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Published Papers (1 paper)

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Research

22 pages, 4293 KB  
Article
Immobilized Sinirhodobacter sp. 1C5-22 for Multi-Metal Bioremediation: Molecular Resistance Mechanisms and Operational Validation in Industrial Wastewater Systems
by Yue Qiao, Xiaojun Huang, Si Chen, Zuye Zhang, Ying Xu, Xiaorui Zhang, Runmei Jia, Song Zhang, Wenting Lin, Xian Jiao, Huirong Chen, Zhipeng Guo, Xiao Ye, Zefeng Wu and Zhongmei Lin
Water 2025, 17(24), 3450; https://doi.org/10.3390/w17243450 - 5 Dec 2025
Viewed by 939
Abstract
A novel heavy metal-resistant bacterium with significant bioremediation capabilities, Sinirhodobacter sp. 1C5-22 was isolated from moderately polluted Shenzhen Futian mangrove rhizosphere sediments. This strain showed exceptional tolerance (MIC ≥ 600 mg/L for Cu/Zn; > 500 mg/L for Ni). Analyses revealed distinct metal-specific distribution [...] Read more.
A novel heavy metal-resistant bacterium with significant bioremediation capabilities, Sinirhodobacter sp. 1C5-22 was isolated from moderately polluted Shenzhen Futian mangrove rhizosphere sediments. This strain showed exceptional tolerance (MIC ≥ 600 mg/L for Cu/Zn; > 500 mg/L for Ni). Analyses revealed distinct metal-specific distribution strategies: Cd and Ni were predominantly bound extracellularly (>80%); Cu was bound intracellularly (~60%); and Zn exhibited balanced partitioning. Integrated omics analysis identified a molecular defense mechanism coordinated by the CreB transcriptional regulator. This Adsorption–Sequestration–Efflux (ASE) system integrates extracellular polymer binding, periplasmic sequestration via stable metal-binding proteins, and efflux pump activity, resolving the apparent adsorption-tolerance paradox at elevated concentrations. For bioremediation applications, we developed a polyvinyl alcohol–sodium alginate immobilized consortium (PVA-SA 1C5-22). The engineered agent displayed significantly enhanced biosorption capacity compared to free cells and effectively mitigated heavy metal-induced oxidative damage, evidenced by stabilized malondialdehyde levels. It demonstrated robust reusability, maintaining high metal enrichment across five adsorption–desorption cycles in multi-metal wastewater with efficient HCl-driven desorption (55–70%). Critically, it achieved stable nickel removal performance (~20% adsorption, >50% desorption) from authentic electroplating wastewater (1850 mg/L Ni2+) through successive multiple cycles. Our integrated approach bridges microbial ecology and environmental biotechnology, establishing this immobilized system as a highly sustainable strategy for complex industrial effluent remediation. Full article
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