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Harmful Cyanobacteria Blooms in Water Source Areas: Current Concept and...
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Harmful Cyanobacteria Blooms in Water Source Areas: Current Concept and Emerging Treatments

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (20 February 2024) | Viewed by 2158

Special Issue Editors

Dr. Hangzhou Xu

E-Mail Website
Guest Editor
School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
Interests: cyanobacteria; toxins; odorous compounds; drinking water; oxidation; coagulation; sludge treatment
Special Issues, Collections and Topics in MDPI journals
Dr. Zhipeng Duan

E-Mail Website
Guest Editor
College of Environment, Hohai University, Nanjing 210098, China
Interests: yanobacteria; cyanotoxins; extracellular substances; cellular stoichiometry; dissolved organic matters

Special Issue Information

Dear Colleagues,

Freshwater ecosystems are those most vulnerable to the combined pressure of anthropogenic activities and climate change. In recent years, the excessive proliferation of harmful cyanobacteria in eutrophic lakes and reservoirs has become a major issue all over the world, especially in the context of continued global warming. Cyanobacterial blooms cause a cascade of changes in the composition and function of prokaryotic and eukaryotic plankton, and thereby lead to a decline in the quality of the aquatic ecosystems and disturb the trophic transmission of the food web structure. More seriously, some harmful cyanobacteria can produce toxins and unpleasant odorant metabolites that interfere with the recreational function of lakes and the use of reservoirs for drinking water, and thus pose a potential risk to humans and animals. Hence, it is very important to identify the impact of cyanobacteria on aquatic ecology and decrease the level of cyanobacterial bloom in freshwater ecosystems.

Therefore, this Special Issue on the “Harmful Cyanobacteria Blooms in Water Source Areas: Current Concepts and Emerging Treatments” aims to publish original research articles and review papers on the toxic cyanobacteria dwelling in drinking water sources, in order to better understand the effect of cyanobacteria in lakes or reservoirs and decrease the influence of cyanobacteria blooms on drinking water.

We look forward to receiving your contributions.

Dr. Hangzhou Xu
Dr. Zhipeng Duan
Guest Editors

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

  • simulation, prediction and early warning of cyanobacterial bloom
  • harmful cyanobacteria detection technology
  • global change and cyanobacterial bloom
  • control technology for cyanobacterial bloom
  • ecological and toxicological effects of harmful cyanobacteria

Published Papers (2 papers)

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Research

14 pages, 1600 KiB  
Article
Changes in Extracellular Microcystins (MCs) Accompanying Algae/Cyanobacteria Removal during Three Representative Algae/Cyanobacteria Inactivation Processes and an MC Diffusion Model in Still Water
by Chengcheng Shi, Weijian Fang, Mengru Ma, Wei Xu and Jingjing Ye
Water 2023, 15(20), 3591; https://0-doi-org.brum.beds.ac.uk/10.3390/w15203591 - 13 Oct 2023
Viewed by 746
Abstract
This study addresses the lack of comparative research on algae/cyanobacteria elimination technologies in the existing literature. Our investigation focused on evaluating the performance of three commonly used algae/cyanobacteria removal processes: ultrasound (20.8 kHz), copper sulfate and biotic algicide (Bacillus subtilis). The [...] Read more.
This study addresses the lack of comparative research on algae/cyanobacteria elimination technologies in the existing literature. Our investigation focused on evaluating the performance of three commonly used algae/cyanobacteria removal processes: ultrasound (20.8 kHz), copper sulfate and biotic algicide (Bacillus subtilis). The evaluation considered both algae/cyanobacteria removal efficacy and the consequent changes in extracellular microcystins (MCs). To achieve this, we employed real eutrophic water as the test water. The ultrasound treatment demonstrated effective algae/cyanobacteria removal, with an average rate of algae/cyanobacteria decreasing (RAD) ranging from 0.50 to 0.99 µg chlorophyll a per liter per minute (µg chlorophyll a/L·min). On the other hand, the copper sulfate and biotic algicide treatments exhibited relatively lower rates of algae/cyanobacteria removal, with average RAD values of 0.21 to 0.38 µg chlorophyll a per liter per day (µg chlorophyll a/L·d) and 0.10 to 0.13 µg chlorophyll a per liter per day (µg chlorophyll a/L·d), respectively. Moreover, we observed significant increases in extracellular MCs in the ultrasound and copper sulfate treatments. The corresponding values of the increment of extracellular MCs accompanying removal per microgramme (µg) chlorophyll a (IEMARMC) were 0.34 to 2.43 µg MCs per µg chlorophyll a (µg MCs/µg chlorophyll a) and 18.13 to 185.08 µg MCs per µg chlorophyll a (µg MCs/µg chlorophyll a), respectively. However, in certain conditions where sufficient dosages (0.5 to 2 mg/L) and reaction time (≥8 days) are provided, the biotic algicide treatment could result in a decrease in MCs compared to an untreated control group (IEMARMC: −43.94 to −32.18 µg MCs per µg chlorophyll a). This suggests that the biotic algicide effectively degraded the MCs. In addition, we developed a one-dimensional MC diffusion model in still water based on Newton’s second law, which exhibits excellent simulation capabilities. Full article
(This article belongs to the Special Issue Harmful Cyanobacteria Blooms in Water Source Areas: Current Concept and Emerging Treatments)
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17 pages, 5278 KiB  
Article
Peroxydisulfate Peroxidation of Cyanobacterial Cells Catalyzed by Non-Graphitic N-Doped Nanodiamonds
by Yuting Wang, Wenshu Li, Junli Liu, Xiaoge Wu, Chen Ling and Yuwei Pan
Water 2023, 15(15), 2768; https://0-doi-org.brum.beds.ac.uk/10.3390/w15152768 - 30 Jul 2023
Cited by 1 | Viewed by 1058
Abstract
Non-graphitic nitrogen-doped nano-scale diamonds were tested in the laboratory for their ability to activate peroxydisulfate for treating Microcystis-laden water. Flocculation was observed and up to 99.8% of the cyanobacterial cells were removed. The flocs’ composition showed that nano-scale diamonds with activated persulfate [...] Read more.
Non-graphitic nitrogen-doped nano-scale diamonds were tested in the laboratory for their ability to activate peroxydisulfate for treating Microcystis-laden water. Flocculation was observed and up to 99.8% of the cyanobacterial cells were removed. The flocs’ composition showed that nano-scale diamonds with activated persulfate promoted the release of protein-like and humic-like substances during the treatment, which could have promoted agglomeration. Comprehensive analyses suggest that both radical and radical-free mechanisms were involved. Extracellular substances associated with the Microcystis cells were modified to function as active bioflocculants, leading to self-flocculation and sedimentation. Full article
(This article belongs to the Special Issue Harmful Cyanobacteria Blooms in Water Source Areas: Current Concept and Emerging Treatments)
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