Water Microbial Contamination and Bioremediation

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

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 6715

Special Issue Editor

Special Issue Information

Dear Colleagues,

Clean water is one of the United Nations Sustainable Development Goals. Microbial pollution in aquatic environments is a the critical aspect in the quality assessment of water bodies used for drinking-water supply, recreational activities, seafood harvesting, and aquaculture, as a result of potential contamination by pathogenic bacteria, viruses, or parasitic protozoa. Rivers, estuaries, and coastal waters are experiencing increased anthropogenic pressure, resulting in water quality deterioration. Besides microbiological water quality decline, nutrient enrichment on inland and coastal waters also presents a major threat by increasing the activity of the primary producers, leading to harmful or toxic algal blooms and eutrophication events.

Monitoring data at relevant spatial and temporal scales under natural environmental variability and diverse ecosystems is essential for drawing and implementing effective protection measures. Water contamination can be limited by reducing contaminant inputs, but also by applying remedial measures to mitigate the negative impacts. However, the design and implementation of remediation strategies is challenging because of the complex dynamics of aquatic ecosystems. Research on new and holistic solutions combining technology and ecology are in dire need in order to support the sustainable management of aquatic resources.

Dr. Catarina Teixeira
Guest Editor

Manuscript Submission Information

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Keywords

  • water quality
  • bacteria
  • microbial dynamics
  • nutrients
  • remediation
  • rivers
  • estuaries
  • coastal waters

Published Papers (2 papers)

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Research

17 pages, 1991 KiB  
Article
Contamination Status of Salmonella spp., Shigella spp. and Campylobacter spp. in Surface and Groundwater of the Kelani River Basin, Sri Lanka
by M.G.Y.L. Mahagamage, M.V.S.C. Pathirage and Pathmalal M. Manage
Water 2020, 12(8), 2187; https://0-doi-org.brum.beds.ac.uk/10.3390/w12082187 - 04 Aug 2020
Cited by 17 | Viewed by 3855
Abstract
Waterborne diseases are a global problem that causes more than 2.2 million deaths annually. Therefore, the present study was focused on microbiological contamination of both ground and surface water by means of total coliform, Escherichia coli (E. coli), Salmonella spp., Shigella [...] Read more.
Waterborne diseases are a global problem that causes more than 2.2 million deaths annually. Therefore, the present study was focused on microbiological contamination of both ground and surface water by means of total coliform, Escherichia coli (E. coli), Salmonella spp., Shigella spp. and Campylobacter spp. Seventy two groundwater and 45 surface water sampling locations were selected to collect water from the head, transitional and meandering regions of the Kelani River Basin for a period of one year (both dry and wet seasons). The results of the study revealed that the entire Kelani River basin was contaminated with total coliform and E. coli bacteria and almost all the sampling locations exceed Sri Lanka Standards Institute (SLSI) guideline value given for drinking water (0 CFU/100 mL). Further, in groundwater, 17 locations were positive for Salmonella spp., whereas only 2 locations were positive for Campylobacter spp. In surface water, 26 and three sampling locations were positive for Salmonella spp. and Campylobacter spp., respectively. In this study, 23 different human pathogenic serovars were isolated and the Salmonella enterica serovar Kentucky was identified as the commonest type. Thus, the result of the study revealed that the consumption of raw water from the Kelani River Basin is unsafe and possible to cause gastrointestinal diseases. Full article
(This article belongs to the Special Issue Water Microbial Contamination and Bioremediation)
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16 pages, 3916 KiB  
Article
Control of Nuisance Cyanobacteria in Drinking Water Resources Using Alternative Algae-Blocking Mats
by Young-Hyo Kim, En-Mi Gwon, Ha-Kyung Kim, In-Hwan Cho, Hyuk Lee and Baik-Ho Kim
Water 2020, 12(6), 1576; https://0-doi-org.brum.beds.ac.uk/10.3390/w12061576 - 31 May 2020
Cited by 3 | Viewed by 2199
Abstract
The water intake facility of Paldangho Lake (PIF), constructed in 1988, supplies drinking water to the Seoul metropolitan area and satellite city (ca. 20 million inhabitants) in South Korea. A nuisance cyanobacterial bloom (CB) has been observed every year in the PIF. Thus, [...] Read more.
The water intake facility of Paldangho Lake (PIF), constructed in 1988, supplies drinking water to the Seoul metropolitan area and satellite city (ca. 20 million inhabitants) in South Korea. A nuisance cyanobacterial bloom (CB) has been observed every year in the PIF. Thus, related governments have been funding the control of CBs and algal-originated materials (AOMs). In this study, an algae-blocking mat (ABM) was developed to protect against CBs and AOMs considering temperature and water depth. We evaluated the daily and monthly performance of the ABM on phytoplankton, pH, dissolved oxygen, chlorophyll-a, and light intensity between April and October 2015. Although the average cell abundance of cyanobacteria between July and September approached the warning level of the Korea alert system, the highest algal removal efficiency was recorded as 92% in August when the cyanobacterial cells were over 66,000 cells/mL. On average, the ABM showed a low removal efficiency of 26% on both geosmin and 2-methylisoborneol, whereas total phytoplankton was more than 30%. In conclusion, our results indicate that the ABM may be an economical blocking tool for nuisance cyanobacteria in drinking water resources, considering AOMs and total phytoplankton. Full article
(This article belongs to the Special Issue Water Microbial Contamination and Bioremediation)
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