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Water
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Water Environment Governance and Restoration
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Water Environment Governance and Restoration

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 6082

Special Issue Editor

Dr. Naiwen Li

E-Mail Website
Guest Editor
State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
Interests: water resources; water reuse; water environment; water environmental governance; drinking water safety and health; water supply and drainage; river restoration; water pollution prevention and remediation; water treatment technology

Special Issue Information

Dear Colleagues,

Water is an indispensable resource; however, water pollution is becoming an increasingly critical concern as economic development continues at an upward trend. The present water pollution issue mainly concerns high levels of nitrogen and phosphorus leading to algal blooms, high levels of organic matter leading to black and odourous rivers, heavy metals leading to poor water quality, etc. Due to the limited nature of water resources, it is urgent that we learn how to effectively govern and restore the water environment.

In view of the above observation, this Special Issue will focus on manuscripts (research papers, reviews, short communications) related to water environment governance methods and restoration technology, which includes removal of nitrogen, phosphorus and algae, degradation of organic matter, and removal of heavy metals or other aspects related to water environment governance and restoration.

Manuscripts in this Special Issue will include cutting-edge research on the development of new technologies to treat the water environment by evaluating treatment performance, cost, applicability of methods or technologies, process development, pathways, and environmental effect.

Dr. Naiwen Li
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

  • water treatment methods
  • removal of nitrogen and phosphorus
  • removal of heavy metals
  • degradation of organic matter
  • water environment governance and restoration technologies
  • water reuse
  • water pollution prevention and remediation

Published Papers (3 papers)

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Research

18 pages, 7358 KiB  
Article
Assessment of Current Blue Energy Technologies and Their Potential Applications on Romanian Water Resources
by Violeta-Monica Radu, Alexandru-Anton Ivanov, Anca-Marina Vîjdea, Veronica-Elena Alexe, George Dincă, Andra-Elena Filiuță and Valentina-Maria Cetean
Water 2023, 15(11), 2063; https://doi.org/10.3390/w15112063 - 29 May 2023
Viewed by 2095
Abstract
This study offers a comprehensive analysis of unconventional renewable and sustainable energy production options by tapping into the energy associated with the natural tendency to cancel salinity gradients that occur when salt water and fresh water come into contact. Furthermore, this paper assesses [...] Read more.
This study offers a comprehensive analysis of unconventional renewable and sustainable energy production options by tapping into the energy associated with the natural tendency to cancel salinity gradients that occur when salt water and fresh water come into contact. Furthermore, this paper assesses the potential for generating blue energy in Romania by examining historical data on flow rates from relevant fresh water sources, such as the Danube River, and the salt loading of potential receiving water bodies, including salt lakes, and the Black Sea. In addition, this study briefly references pilot-level technologies for blue energy production in other countries, including Norway, Japan, and the European Union. Based on literature data, this paper highlights the most important technological methods with applicative potential for harnessing energy from salinity gradients. The performances and limitations of these methods have been presented, acknowledging that despite recent years of advancements in materials and technologies, large-scale implementation and commercialization efforts are still limited. The analyzed data reveals that Romania possesses substantial potential blue energy resources for both large capacity installations, such as the Danube River-Black Sea with a potential achievable capacity of about 50 MW, as well as smaller capacity devices situated around saline lakes and salt deposits. This study concludes that Romania has a unique opportunity to capitalize on its vast blue energy potential and drive sustainable energy development. Full article
(This article belongs to the Special Issue Water Environment Governance and Restoration)
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16 pages, 2467 KiB  
Article
Hydrochemical Anomalies in the Vicinity of the Abandoned Molybdenum Ores Processing Tailings in a Permafrost Region (Shahtama, Transbaikal Region)
by Nataliya Yurkevich, Vladimir Olenchenko, Andrei Kartoziia, Tatyana Korneeva, Svetlana Bortnikova, Olga Saeva, Kristina Tulisova and Natalya Abrosimova
Water 2023, 15(8), 1476; https://doi.org/10.3390/w15081476 - 10 Apr 2023
Cited by 1 | Viewed by 1406
Abstract
The mobility of chemical elements during the transition from molybdenum ore processing waste to aqueous solutions and the hydrochemical anomalies of a number of elements in surface and underground waters in the vicinity of an abandoned tailings dump were investigated. It is shown [...] Read more.
The mobility of chemical elements during the transition from molybdenum ore processing waste to aqueous solutions and the hydrochemical anomalies of a number of elements in surface and underground waters in the vicinity of an abandoned tailings dump were investigated. It is shown that alkaline and alkaline earth metals have high mobility—the main rock-forming components (sodium, lithium, magnesium, strontium), which are released into solution due to leaching from the minerals of the host rocks, as well as metals with zinc, cadmium, manganese, and nickel, which are released into solution due to the dissolution of ore sulfides. Elements with high mobility include Sb, Co, Cu, Be, Se, and Tl. Medium mobility has As, an element of the first hazard class, as well as Mo, Fe, and Pb. Hydrochemical anomalies of cadmium, arsenic, molybdenum, and lead have been determined. The nature of the arsenic and molybdenum anomalies is most likely related to the regional background, while the source of cadmium and lead is most likely the waste studied. The main chemical forms of the presence of elements in the solution of ponds on the surface of tailings ponds are free-ion and sulfate complexes. For example, in the samples of the Shakhtama River and groundwater, we found carbonate, bicarbonate, and hydroxide complexes. The information obtained should be taken into account when planning measures for the purification of surface and groundwater from metals. Additional studies should consider using groundwater in the vicinity of the tailings for drinking water supply. Full article
(This article belongs to the Special Issue Water Environment Governance and Restoration)
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18 pages, 3970 KiB  
Article
Synergistic Effects of Calcium Peroxide and Fe3O4@BC Composites on AVS Removal, Phosphorus and Chromium Release in Sediments
by Yintian Li, Yanchun Huang, Xueying Wang, Ge Gou, Chao Liu, Jun Li, Yuxin He and Naiwen Li
Water 2022, 14(10), 1626; https://doi.org/10.3390/w14101626 - 18 May 2022
Viewed by 2017
Abstract
Black odorous sediment pollution in urban areas has received widespread attention, especially pollution caused by acidified volatile sulfide (AVS), phosphorus and heavy metals. In this study, an Fe3O4@BC composite was fabricated by the coprecipitate method of Fe3O [...] Read more.
Black odorous sediment pollution in urban areas has received widespread attention, especially pollution caused by acidified volatile sulfide (AVS), phosphorus and heavy metals. In this study, an Fe3O4@BC composite was fabricated by the coprecipitate method of Fe3O4 and biochar (BC) and was mixed with calcium peroxide (CP) for sediment pollution treatment. The results showed that the AVS removal rate could reach 52.8% in the CP+Fe3O4@BC system and −18.1% in the control group on the 25th day. AVS was removed in the following three ways: AVS could be oxidized with oxygen produced by CP; H2O2 produced from CP also could be activated by Fe2+ to generate hydroxyl radicals that have strong oxidation properties to oxidize AVS; AVS could also be removed by bacterial denitrification. As for phosphorus, total phosphorus (TP) content in overlying water remained at 0.1 mg/L after CP and Fe3O4@BC were added. This is due to the conversion of NH4Cl-P and Fe/Al-P into Ca-P in sediments, which inhibited the release of phosphorus. Simultaneously, the release and migration of heavy metal chromium (Cr) were slowed, as demonstrated by the results (the acid extractable and reducible states of Cr in the sediment decreased to 0.58% and 0.97%, respectively). In addition, the results of the high-throughput genetic test showed the total number of microorganisms greatly increased in the CP+Fe3O4@BC group. The abundance of Sulfurovum increased while that of sulphate-reducing bacteria (SRBs) was inhibited. Furthermore, the abundance of denitrifying bacteria (Dechlorominas, Acinetobacter and Flavobacterium) was increased. In brief, our study showed the synergistic effect of Fe3O4@BC composites and CP had a remarkable effect on the urban sediment treatment, which provides a new way to remove sediment pollution. Full article
(This article belongs to the Special Issue Water Environment Governance and Restoration)
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