scholarly journals The Occurrence of Potential Harmful Cyanobacteria and Cyanotoxins in the Obrzyca River (Poland), a Source of Drinking Water

Toxins ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 284 ◽  
Author(s):  
Wanda Czyżewska ◽  
Marlena Piontek ◽  
Katarzyna Łuszczyńska
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Dominant Species ◽  
Cyanobacterial Blooms ◽  
Effective Control ◽  
Dugesia Tigrina ◽  
Chemical Indicators ◽  
Drinking Water Resources ◽  
Harmful Cyanobacteria ◽  
Contaminate Drinking Water

Harmful cyanobacteria and their cyanotoxins may contaminate drinking water resources and their effective control remains challenging. The present study reports on cyanobacterial blooms and associated cyanotoxins in the Obrzyca River, a source of drinking water in Poland. The river was examined from July to October 2019 and concentrations of microcystins, anatoxin-a, and cylindrospermopsin were monitored. The toxicity of water samples was also tested using an ecotoxicological assay. All studied cyanotoxins were detected with microcystins revealing the highest levels. Maximal microcystin concentrations (3.97 μg/L) were determined in September at Uście point, exceeding the provisional guideline. Extracts from Uście point, where the dominant species were Dolichospermum flos-aquae (August), Microcystis aeruginosa (September), and Planktothrix agardhii (October), were toxic for Dugesia tigrina Girard. Microcystin concentrations (MC-LR and MC-RR) were positively correlated with cyanobacteria biovolume. Analysis of the chemical indicators of water quality has shown relationships between them and microcystins as well as cyanobacteria abundance.

scholarly journals Advancing Knowledge on Cyanobacterial Blooms in Freshwaters

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2583
Author(s):  
Elisabeth Vardaka ◽  
Konstantinos Ar. Kormas
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Mathematical Modelling ◽  
Ecological Status ◽  
Toxin Production ◽  
Cyanobacterial Blooms ◽  
Special Issue ◽  
Research Papers ◽  
Cyanobacterial Species ◽  
Water Quality Deterioration

Cyanobacterial blooms have become a frequent phenomenon in freshwaters worldwide; they are a widely known indicator of eutrophication and water quality deterioration. Information and knowledge contributing towards the evaluation of the ecological status of freshwaters, particularly since many are used for recreation, drinking water, and aquaculture, is valuable. This Special Issue, entitled “Advancing Knowledge on Cyanobacterial Blooms in Freshwaters”, includes 11 research papers that will focus on the use of complementary approaches, from the most recently developed molecular-based methods to more classical approaches and experimental and mathematical modelling regarding the factors (abiotic and/or biotic) that control the diversity of not only the key bloom-forming cyanobacterial species, but also their interactions with other biota, either in freshwater systems or their adjacent habitats, and their role in preventing and/or promoting cyanobacterial growth and toxin production.

scholarly journals Exploration of coliform diversity in drinking water resources by culture-independent approaches

2020 ◽  
Vol 10 (3) ◽  
pp. 580-588
Author(s):  
A. Shiva Shanker ◽  
Praveen Kumar Vootla ◽  
Pavan Kumar Pindi
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Total Coliform ◽  
Gene Clone ◽  
Rrna Gene ◽  
Waterborne Diseases ◽  
Limited Capacity ◽  
Drinking Water Resources ◽  
Culture Independent ◽  
Public Health Protection

Abstract The coliform group has been widely used as an indicator of water quality and has historically led to a public health protection concept. Presence of pathogens in drinking water may raise several health problems in humans from mild illnesses to serious waterborne diseases. In spite of several measures taken, water quality is always a pertinent issue prevailing in diverse water systems. So far, coliform contamination and diversity could not be adequately explored as traditionally used culture-dependent methods have a limited capacity to characterize microbiota from their respective sources. The study was designed for assessment of microbial diversity by culture-independent approaches placing emphasis on exploring the total coliform diversity in two drinking water reservoirs, Raman Pahad and Koilsagar of Mahabubnagar district, Telangana, India. Principal analysis based on 16S rRNA gene clone libraries revealed that Raman Pahad library clones belonged to genus Enterobacter (41.5%), followed by Citrobacter (25.03%), Klebsiella (17.86%), Escherichia (12.20%), and the least being Hafnia (3.39%). The clones in Koilsagar belonged to genus Enterobacter (46.42%) as the most predominant, followed by Citrobacter (32.14%) and Escherichia (21.42%). Comparatively, Enterobacter was observed to be the most predominant (representing 50%) of the total clones in both reservoirs.

scholarly journals Results of quality studies of spring waters of the Republic of Tatarstan

2021 ◽  
Author(s):  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Practical Interest ◽  
Poor Quality ◽  
Total Alkalinity ◽  
Alternative Source ◽  
Chemical Indicators ◽  
The Republic ◽  
Physical And Chemical

The study of springs is of great scientific and practical interest, because the population increasingly prefers to use spring water as an alternative source of drinking water. Methods. Studies were conducted to determine the water quality in 14 springs located on the territory of the Republic of Tatarstan, according to physical and chemical indicators in the summer period by organoleptic, potentiometric, titrimetric, photometric and gravimetric methods. Results. It was found that the water fully meets the hygienic requirements in only 8 springs (57.1 %). It was revealed that the non-compliance of spring waters with sanitary standards for physical and chemical parameters is associated with the excess of the MAC for nitrates and hardness. Also the excess of the MAC for total alkalinity was determined. The main reasons for the poor quality of drinking water are the pollution of water sources. The data obtained confirmed the need for constant monitoring of the water quality in all springs and development of measures to improve them.

Implementation of Water Safety Plan Efforts to Improvement of Source Water Quality in Tokyo Waterworks

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
H. Yamada ◽  
M. Ikeda ◽  
K. Suzuki ◽  
S. Konishi ◽  
T. Oikawa
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Control Point ◽  
World Health ◽  
Effective Control ◽  
Catchment Management ◽  
Raw Water ◽  
Water Safety ◽  
Control Criteria ◽  
Purification Plant

In 2004, the World Health Organization proposed a new approach to risk assessment and risk management for drinking-water supplier, which is based on HACCP (Hazard Analysis and Critical Control Point) and termed “Water Safety Plans (WSPs)”. About four years later, Tokyo Waterworks developed WSPs in March 2008. In the WSPs of Tokyo Waterworks, control criteria are set for risk-related water quality items with general principle of using a 10 –50% value of the water quality standards, for the purpose of the early detection of the potential risk. On February 2008, a concentration of 1,4-dioxane exceeded the control criteria, which was set as 10% value (= 0.005mg/L) of the Japanese drinking-water quality standard (= 0.05mg/L). Removal of 1,4-dioxane in purification process is very difficult, so effective control measure of 1,4-dioxane is only by decreasing the concentration in raw water. However, the catchment management is outside the jurisdiction of the Tokyo Waterworks. This article represents a case study of the implementation of WSPs, focused on the efforts for protection raw water against 1,4-dioxane in Misato Purification Plant, which was selected as a model and started implementation since April 2007 precedent to other purification plant.

Impacts of phosphorus loads on the water quality and the proliferation of harmful cyanobacteria in Foum-Gleita Reservoir (Mauritania)

2021 ◽  
Vol 57 ◽  
pp. 1
Author(s):  
Ahmed Sidi Sadegh ◽  
Zeinebou Sidoumou ◽  
Mamadou Dia ◽  
Juan Luis Gomez Pinchetti ◽  
Noureddine Bouaïcha
Keyword(s):  
Water Quality ◽  
High Performance ◽  
Freshwater Ecosystems ◽  
Cyanobacterial Blooms ◽  
Pearson’S Correlation ◽  
Biological Variables ◽  
Nitrogen Inputs ◽  
Harmful Cyanobacteria ◽  
Nitrogen Concentrations ◽  
Pearson's Correlation

Excess phosphorus and nitrogen inputs into freshwater ecosystems is one of the main causes of expansion of harmful cyanobacterial blooms worldwide. This work was conducted to study the impacts of phosphorus leaching from the exploitation of phosphate mines present in the watershed of Foum-Gleita Reservoir (Mauritania) on the water quality and its major contribution to the proliferation of harmful cyanobacteria throughout the year. The physicochemical parameters, the occurrence and abundance of phytoplankton (including cyanobacteria), and the microcystins concentration were monitored monthly from September 2017 to August 2018. The relationships between limnological and biological variables were explored by using Pearson's correlation and forward stepwise multiple linear regression (MLR) analysis. Microcystins were detected by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Our results showed that this reservoir can be classified as hypereutrophic throughout the year and that Microcystis aeruginosa (M. aeruginosa) and Dolichospermum flos-aquae (D. flos-aquae) were dominant species during the rainy season (July-September), and only the congener microcystin-LR (MC-LR) was detected with a peak at 3.55 µg L−1. Pearson's correlation and MLR analysis showed that water temperature pH, phosphorus, nitrogen, and iron concentrations were the most important variables accounting for M. aeruginosa and D. flos-aquae abundance and MC-LR concentration. Our study provides new insight into the effects of moderate nitrogen concentrations on phytoplankton community composition with dominance of the cyanobacteria phylum in phosphorus-rich freshwater ecosystems.

Design of a drinking water quality monitoring and evaluation system

2019 ◽  
Vol 15 (1) ◽  
pp. 77-83
Author(s):  
Meilian Zhao ◽  
Peixue Liu ◽  
Baohua Jiang ◽  
Yujie Chen
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Drinking Water ◽  
Water Resources ◽  
Evaluation System ◽  
Monitoring And Evaluation ◽  
Water Quality Monitoring ◽  
Drinking Water Quality ◽  
Quality Monitoring ◽  
Drinking Water Resources

Abstract With the rapid development of industry and agriculture, water pollution is found everywhere, and the protection of water resources has attracted increasing attention. For a long time, drinking water pollution was measured manually, which is time-consuming and laborious. To effectively detect and evaluate drinking water pollution, a drinking water quality monitoring and evaluation system is designed. The system can perform real-time measurements of water temperature, conductivity, turbidity and other parameters. The measurement results can be displayed on an LCD screen and can be transmitted remotely. The system can be used to detect the contamination of drinking water resources, such as surface water and groundwater, and to judge whether the water quality is qualified according to the set threshold parameters. The test results demonstrate that the system can realize dynamic monitoring and evaluation of drinking water resources. In addition, the system can provide effective data for water resource environmental protection.

scholarly journals Harmful Cyanobacteria in Three Oregon Lakes: Comments on Hall et al. Beyond Water Quality Advisories and Total Maximum Daily Loads (TMDLs). Water 2019, 11, 1125

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2482
Author(s):  
Joseph Eilers
Keyword(s):  
Water Quality ◽  
Current System ◽  
Timber Harvest ◽  
The State ◽  
Cyanobacterial Blooms ◽  
Septic Systems ◽  
Total Maximum Daily Loads ◽  
Harmful Cyanobacteria ◽  
Maximum Daily Loads ◽  
Total Maximum

The article “An Ecological Function Approach to Managing Harmful Cyanobacteria in Three Oregon Lakes: Beyond Water Quality Advisories and Total Maximum Daily Loads (TMDLs), Water 11:1125” by Hall et al. critiques the current approach used by the state of Oregon with regard to managing cyanobacterial blooms and offers the proper functioning condition (PVC) as a superior method of managing cyanobacterial blooms in lakes derived from nonpoint sources of pollution. They evaluated three lakes in Oregon as examples of how this approach could be applied to support water quality improvement. Two of the three lakes, Lemolo and Diamond, experienced cyanobacterial blooms, not as a function of nonpoint source loadings from the watershed, but rather because of internal nutrient cycling associated with high fish biomass. The third lake, Tenmile Lakes, in additional to having a greatly altered fish community, also experiences cyanobacterial blooms (CyanoHABs) issues because of timber harvest on steep slopes, loss of wetlands, altered watershed hydrology and nutrient input from septic systems. The authors’ attempts to use satellite images and PVC methodology on the stream networks is incomplete with respect to Tenmile Lakes and is totally misdirected regarding Lemolo and Diamond Lakes. Although I don’t support the current system employed by the state of Oregon to manage lakes experiencing CyanoHABs issues, the proposed approach offered by staff with the U.S. Environmental Protection Agency will yield little water quality benefit for the lakes in question.

Evaluation on Water Quality of Urban Drinking Water Source in Beibei District, Chongqing

2013 ◽  
Vol 409-410 ◽  
pp. 148-151
Author(s):  
Jie Xiang ◽  
Chang Ming Cheng ◽  
Yi Zhang
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Evaluation Method ◽  
Water Source ◽  
Drinking Water Source ◽  
Quality Of Water ◽  
Drinking Water Resources ◽  
Index Evaluation ◽  
Urban Drinking Water

In 21 century, water quality problem is one of the most serious questions that effected human healthy and social development. In this context, it is necessary to evaluation water quality for drinking water. This is undoubtedly of great significance to human health and social stability. Based on the water monitoring and field surveys, this manuscript applied with “one-vote negation” method and eutrophic index evaluation method for two important urban drinking water resources in Beibei district, Chongqing. These two method were mainly depend on single water quality index which was indicated the worst one. And the results shower that: (1) evaluation by “one-vote negation” method, water quality of water resource D was satisfied with grade Ⅲ, and centralized water supply of J was meet with grade Ⅱ. (2)Eutrophication assessment on all water points indicate that the evaluation results of water quality is acceptable.

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