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 Origin, Fate and Control of Pharmaceuticals in the Urban Water Cycle: A Case Study

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 1034 ◽  
Author(s):  
Roberta Hofman-Caris ◽  
Thomas ter Laak ◽  
Hans Huiting ◽  
Harry Tolkamp ◽  
Ad de Man ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Wastewater Treatment ◽  
Ecological Status ◽  
Transformation Products ◽  
Additional Treatment ◽  
Water Production ◽  
The European Union ◽  
Drinking Water Production

The aquatic environment and drinking water production are under increasing pressure from the presence of pharmaceuticals and their transformation products in surface waters. Demographic developments and climate change result in increasing environmental concentrations, deeming abatement measures necessary. Here, we report on an extensive case study around the river Meuse and its tributaries in the south of The Netherlands. For the first time, concentrations in the tributaries were measured and their apportionment to a drinking water intake downstream were calculated and measured. Large variations, depending on the river discharge were observed. At low discharge, total concentrations up to 40 μg/L were detected, with individual pharmaceuticals exceeding thresholds of toxicological concern and ecological water-quality standards. Several abatement options, like reorganization of wastewater treatment plants (WWTPs), and additional treatment of wastewater or drinking water were evaluated. Abatement at all WWTPs would result in a good chemical and ecological status in the rivers as required by the European Union (EU) Water Framework Directive. Considering long implementation periods and high investment costs, we recommend prioritizing additional treatment at the WWTPs with a high contribution to the environment. If drinking water quality is at risk, temporary treatment solutions in drinking water production can be considered. Pilot plant research proved that ultraviolet (UV) oxidation is a suitable solution for drinking water and wastewater treatment, the latter preferably in combination with effluent organic matter removal. In this way >95% of removal of pharmaceuticals and their transformation products can be achieved, both in drinking water and in wastewater. Application of UV/H2O2, preceded by humic acid removal by ion exchange, will cost about €0.23/m3 treated water.

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.

Raising a glass to clean water

2002 ◽  
Vol 4 (1) ◽  
pp. 2N-6N
Author(s):  
Mike Sharpe
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Environmental Analysis ◽  
Drinking Water Quality ◽  
Clean Water ◽  
Special Issue ◽  
Future Evolution ◽  
Regulatory Frameworks ◽  
The Us

For this special issue on drinking water quality, Focus takes a look at the regulatory frameworks for drinking water in Europe and the US and the role of environmental analysis in their future evolution.

scholarly journals Study of Water Quality Indicators of Mountain Rivers Used as Source of Drinking Water Supply of the Targu-Jiu Municipality

2020 ◽  
Vol 71 (1) ◽  
pp. 384-389
Author(s):  
Delia Nica-Badea ◽  
Simona Brandibur
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Natural Waters ◽  
Ecological Status ◽  
Quality Criteria ◽  
Quality Standards ◽  
Biological Indicators ◽  
Mountainous Area ◽  
Water Quality Criteria ◽  
National Quality

Water quality criteria are all physicochemical and biological indicators that characterize a body of water. The current study aims at investigating the quality of two natural waters in the Gorj County sub-mountainous area (�u�i�a, Vaidei and Runc, capture Runc) used as drinking water sources of Targu-Jiu. Sampling and determinations use spectrophotometric, gravimetric, volumetric or electrometric techniques in accordance with standard methods (SR ISO and / or SR EN) for a series of physicochemical indicators analyzed between January - December 2017: thermal and acidification, oxygen regime, nutrients, salinity, relevant pollutants. Experimental values, annual averages related to the quality standards for potable water, ecological status and classification of water bodies, place the water of the two rivers in the drinking water category A1 and the first class of ecological quality. The Water Quality Index (WQI) for 9 selected parameters highlighted a sensitively close overall level of the water of the two rivers Susita (88) and Runc (85.2), the good quality category (7o-9o), reported to national quality standards for surface water which can be used for delivery as drinking water.The study of indicators of the two rivers in relation to national rules aligned with the European water requirements and research shows a high qualitative status corresponding to community uses.

4.  Diatom‐based Paleolimnological Assessment of Long Term Water Quality Trends, Near Forrest Island, Lake of the Woods, Ontario

2017 ◽  
Author(s):  
Ashley Jenkin
Keyword(s):  
Water Quality ◽  
Algal Blooms ◽  
Multiple Stressors ◽  
Cyanobacterial Blooms ◽  
Lake Of The Woods ◽  
A Site ◽  
Water Quality Trends ◽  
Water Quality Deterioration ◽  
The City

Lake of the Woods (LOW) is a large, international freshwater body that shares borders with Ontario, Manitoba, and Minnesota. Previous studies from the LOW have found that water quality is spatially variable in this complex lake. The current perception is that cyanobacterial blooms have increased in frequency and intensity, generating much interest in determining whether increased nutrients have resulted in water quality deterioration. To address this concern, paleolimnological techniques will be used to examine changes in diatom assemblage over the last ca. 200 years on a dated sediment core retrieved near Forrest Island, close to the city of Kenora, Ontario. Comparisons will be made to other LOW sites that are elevated in total phosphorous (TP) and experience algal blooms (impact sites) as well as a site with low TP that does not experience algal blooms (reference site). Based on the Forrest Island diatom shifts, the following questions will be examined: (1) What is the baseline condition of this site? (2) Have diatom assemblages and/or water quality changed over time? (3) If so, are these changes comparable to other LOW sites?; and (4)What are the potential mechanisms for these changes? To aid our interpretation, a diatom‐based inference model for TP will be applied downcore to examine whether TP concentrations have changed over the last few centuries. Additionally, other mechanisms such as recent warming will also be examined. Results from this study could have important implications related to the impacts of multiple stressors on the LOW

Using multiple indicators to assess spatial and temporal changes in ecological condition of a drinking water reservoir in central China

2019 ◽  
Vol 55 ◽  
pp. 9
Author(s):  
Guojia Huang ◽  
Yushun Chen ◽  
Xiaoqing Wang ◽  
Robert M. Hughes ◽  
Luowei Xu
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Ecological Status ◽  
Water Reservoir ◽  
Ecological Condition ◽  
Central China ◽  
Limiting Factor ◽  
Group Index ◽  
Drinking Water Source ◽  
Lower Reservoir

Monitoring the ecological status of drinking water reservoirs is very important for assessing risks to the safety of drinking water supplies. Because of the huge number of potential organic and inorganic contaminants in water, we focused our study on common water quality variables and three ecological indices. In this study, we used the modified Carlson trophic status index, Shannon diversity index, and the phytoplankton functional group index to assess the changing ecological status of Zhushuqiao Reservoir, a drinking water source in central China. Stratified water sampling for abiotic and biotic variables was conducted bimonthly from April 2016 to February 2017. All three indices indicated that upper reservoir water quality and ecological condition were worse than those in the lower reservoir. Also, the dominant phytoplankton species in the upper reservoir differed significantly from those in the lower reservoir. The reservoir was eutrophic from June to October, especially in June. During the other months, it was mesotrophic, with the best water quality in winter. Water temperature was the main driver of seasonal changes in both biotic and abiotic indicators, although hydrological condition also affected water quality. Total phosphorus (TP) was the limiting factor for phytoplankton, but phytoplankton biomass increased greatly when both TP and total nitrogen increased. Each index had weaknesses; but applying all three together yielded a comprehensive ecological assessment of Zhushuqiao Reservoir and could do so for other similar reservoirs.

scholarly journals Analisis Kandungan Bakteri Fecal Coliform pada Sungai Kuin Kota Banjarmasin

2017 ◽  
Vol 31 (2) ◽  
pp. 51 ◽  
Author(s):  
Deasy Ari Santy ◽  
Sidharta Adyatma ◽  
Nurul Huda
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Fecal Coliform ◽  
Average Concentration ◽  
Research Data ◽  
Coliform Bacteria ◽  
Fecal Coliform Bacteria ◽  
Quality Deterioration ◽  
Diarrhea Incidence ◽  
Water Quality Deterioration

ABSTRAKSungai Kuin merupakan anak Sungai Martapura yang yang bermuara di Sungai Barito. Sungai ini terdapat di Kota Banjarmasin, Kalimantan Selatan. Kejadian diare tertinggi di Kota Banjarmasin terjadi di bantaran Sungai Kuin, sehingga perlu dilakukan penelitian mengenai kandungan bakteri fecal coliform pada sungai ini. Penelitian ini bertujuan menganalisis jumlah kandungan bakteri fecal coliform di Sungai Kuin dan menganalisis cara mengatasi penurunan kualitas air Sungai Kuin akibat keberadaan bakteri fecal coliform. Data diambil sepanjang Sungai Kuin dengan panjang 3.909,00 m yang terbagi menjadi 20 segmen (10 segmen berada di bagian kanan sungai dan 10 segmen berada di bagian kiri sungai). Pembagian segmen berdasarkan panjang sungai per 390 meter, dengan sampel sebanyak 5 segmen yang mewakili segmen lainnya. Teknik analisis yang digunakan yaitu dengan menggunakan hasil uji laboratorium, perbandingan terhadap Peraturan Gubernur Kalimantan Selatan No 5 tahun 2007 dan referensi dari katalog informasi pilihan jamban sehat. Hasil penelitian menunjukkan bahwa kualitas air Sungai Kuin adalah berwarna kecoklatan, dan terkadang tercium bau terutama pada saat hujan turun. Jumlah rerata kandungan bakteri fecal coliform di Sungai Kuin adalah 210/100 ml pada saat pasang naik dan 780/100 ml pada saat pasang surut. Kualitas air Sungai Kuin tidak tidak memenuhi baku mutu air minum karena kandungan bakteri fecal coliform berada di atas baku mutu 100/100 ml.  Penurunan kualitas air Sungai Kuin dapat dilakukan dengan pembangunan jamban yang sesuai dengan lingkungan perairan pasang surut.ABSTRACTKuin River is a tributary of Martapura River, which flows into Barito River. It traverses Banjarmasin City, South Kalimantan Province. The highest diarrhea incidence in this city was found in the banks of Kuin River. Therefore, this research, focusing on fecal coliform bacteria in Kuin River, becomes necessary. Aside from analyzing the concentration of fecal coliform, it aimed to determine the strategies for dealing with the resultant water quality deterioration. The research data was obtained directly from Kuin River, i.e., 3.909 m in length. The river was divided into 20 segments (10 segments on each side of the river); hence, the length of each segment was 390 m. Afterwards, five segments were selected to represent the river. The research used laboratory analysis and, then, compared the analysis results with the Governor Regulation No. 5/2007 and other references, i.e., selected catalogs containing information of healthy lavatories. The results showed that the physical appearance of Kuin River included brownish color and foul-smelling water, especially during rainfall. The average concentration of fecal coliform bacteria in Kuin River was 210/100 ml during high tides and 780/100 ml during low tides. The water quality did not meet the standard for drinking water because the bacteria found in the river was above the allowed concentration, i.e., 100/100 ml. Water quality deterioration can be decelerated by constructing lavatories that are suitable for tidal environment.   

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