scholarly journals Monitoring and assessing the physico-chemical water properties and planktonic communities in tilapia nursing pond

2021 ◽  
Vol 9 (1) ◽  
pp. 23-27
Author(s):  
Z Ferdoushi ◽  
MH Rasid ◽  
ZP Patwary ◽  
TH Sarkar ◽  
MI Akter
Keyword(s):  
Water Properties ◽  
Physico Chemical ◽  
Chemical Water ◽  
Planktonic Communities

Physico-chemical water properties and flora diversity under the old mining load influence (Rudnansky creek, Slovakia)

2015 ◽  
Vol 10 (2) ◽  
pp. 123-131
Author(s):  
Lenka Angelovičová ◽  
Zuzana Boguská ◽  
Danica Fazekašová
Keyword(s):  
Water Properties ◽  
Physico Chemical ◽  
Flora Diversity ◽  
Chemical Water

scholarly journals Hydrological regime and physico-chemical water properties of various types of peat bog sites: case study of Mezilesní peat bog, Šumava Mts.

Geografie ◽  
2020 ◽  
Vol 125 (1) ◽  
pp. 21-46
Author(s):  
Tomáš Doležal ◽  
Lukáš Vlček ◽  
Jan Kocum ◽  
Bohumír Janský
Keyword(s):  
Hydrological Regime ◽  
Peat Bogs ◽  
Peat Bog ◽  
Rainfall Runoff ◽  
Study Objective ◽  
Water Properties ◽  
Hydrological Extremes ◽  
Physico Chemical ◽  
Chemical Water

In a period with frequently occurring hydrological extremes, research on areas with a high retention potential is brought into focus. The Šumava Mountains peat bogs are important parts of the landscape in the headwater area of the Otava river basin. The study objective is to describe the variability of discharges and the dynamics of groundwater level changes in various types of peat bogs, and to identify connections between observed physico-chemical water properties. This is assessed by basic statistical methods. The rainfall-runoff process and physico-chemical water properties can be affected by many factors. In this case, strong relations between the observed parameters were identified along with considerable differences in the involvement of various types of peat bog sites in the runoff process. It is evident that the peat bog pattern and its vegetation cover have an essential effect on the hydrological regime and water properties stored in a peat bog.

scholarly journals On Photocatalytic Activity of Systems of Titania/(Fe (II, III))-Type in Aqueous Suspensions

2018 ◽  
Vol 17 (6) ◽  
pp. 521-527
Author(s):  
V. A. Gorbunova ◽  
L. M. Sliapniova
Keyword(s):  
Photocatalytic Activity ◽  
Oxidation Reaction ◽  
High Photocatalytic Activity ◽  
Organic Dye ◽  
Iron Ions ◽  
Physico Chemical ◽  
Photocatalytic System ◽  
Initial Suspension ◽  
Hydrolysis Of ◽  
Chemical Water

. The photocatalytic activity of three systems, promising for chemical water purification technologies, was experimentally compared, based on a combination of titanium dioxide/(Fe(II, III)), applying to the model oxidation reaction of methylorange organic dye in an aqueous medium. Herewith the cases of photocatalytic systems were investigated, which are based on: a) titania hydrosol obtained by hydrolysis of titanium isobutylate; b) a similar hydrosol with addition of Fe(III) ions; c) suspension of ilmenite powder based on FeTiO3. As a result of the investigation, the increase of the rate of destruction of methylorange by more than two times was found in the system with the introduction of a small amount of iron ions into initial suspension of the TiO2 hydrosol (at the obtaining a medium with the Fe3+ concentration up to 3.7 × 10–5 M). In the photocatalytic system, based on the suspension of pretreated (with suphation and calcination) ilmenite powder, enough high photocatalytic activity (the degree of methylorange decomposition up to 77 %) was measured but at a higher exposure than for the case of systems based on the TiO2 hydrosol. For the photocatalytic systems of the type being investigated, a possible mechanism of increasing their oxidative activity was briefly considered, which requires an additional physico-chemical analysis.

The hydrochemistry of peatland lakes as a result of the morphological characteristics of their basins

2013 ◽  
Vol 42 (1) ◽  
Author(s):  
Krzysztof Banaś
Keyword(s):  
Organic Carbon ◽  
Morphological Characteristics ◽  
Acidic Ph ◽  
Water Colour ◽  
Water Characteristics ◽  
Physico Chemical ◽  
Carbon Compounds ◽  
Oligotrophic Water ◽  
Basin Morphology ◽  
Chemical Water

AbstractThe physico-chemical water characteristics and basin morphology of 10 well-preserved Pomeranian peatland lakes were examined. These are acidic (pH 3.95–5.99), softwater (1.5 ±0.9 mg Ca dm−3), and oligotrophic water bodies. Their hydrochemical conditions differentiate them into two groups: poor (3.04 ±2.77 mg C dm−3) and rich (10.36 ±7.27 mg C dm−3) in organic carbon compounds. They differ in water colour (p = 0.02), humic acid concentration (p<0.001), redox potential (p = 0.007), and irradiance (PAR; p = 0.03).The hydrochemistry of the lakes is determined by their basin morphology, which affects the water colour and the concentrations of humic acids and organic carbon compounds.

scholarly journals Contribution of chemical water properties to the differential responses of bacterioneuston and bacterioplankton to ultraviolet-B radiation

2013 ◽  
Vol 87 (2) ◽  
pp. 517-535 ◽  
Author(s):  
Ana L. Santos ◽  
Inês Baptista ◽  
Newton C. M. Gomes ◽  
Isabel Henriques ◽  
Adelaide Almeida ◽  
...  
Keyword(s):  
Ultraviolet B ◽  
Water Properties ◽  
Ultraviolet B Radiation ◽  
Differential Responses ◽  
Chemical Water

Mayfly (Insecta: Ephemeroptera) assemblages of a regulated perennial Mediterranean river system in the Western Balkans

Biologia ◽  
2016 ◽  
Vol 71 (9) ◽  
Author(s):  
Marina Vilenica ◽  
Ana Previšić ◽  
Marija Ivković ◽  
Aleksandar Popijač ◽  
Ivan Vučković ◽  
...  
Keyword(s):  
River System ◽  
River Regulation ◽  
Scaling Analysis ◽  
Karst Hydrology ◽  
Western Balkans ◽  
Multidimensional Scaling Analysis ◽  
Ecological Disturbance ◽  
Physico Chemical ◽  
Abundance And Diversity ◽  
Chemical Water

AbstractThe influences of river regulations on aquatic biota are insufficiently investigated. We assessed the level of ecological disturbance of the mayfly assemblages through the damming and flow alterations at two highly regulated Mediterranean rivers in Croatia: the Cetina River and its tributary, the Ruda. Contrary to our hypotheses, species richness, abundance and diversity of mayflies increased along the river’s course. At the sites directly influenced by the river regulations, mayfly assemblage changed: it was less diverse and less abundant. However, no obvious influence of the river regulation on the mayfly assemblages was detected for the sites that were indirectly influenced by these alterations. This was most likely due to specific karst hydrology, i.e., the presence of lateral springs along the course of the river. Multidimensional scaling analysis (MDS) revealed grouping of sites according to the similarity in physico-chemical water properties. The pH and water temperature were the most important environmental variables influencing mayfly assemblages. The data on ecology and distribution of mayflies presented in the current study represent a valuable background for further research and conservation practices in the Mediterranean region.

Evaluation of Water Quality Indices Adequacy in Characterizing the Physico-Chemical Water Quality of Lakes

2017 ◽  
Vol 4 (S1) ◽  
pp. 35-46 ◽  
Author(s):  
Eleni Trikoilidou ◽  
Georgios Samiotis ◽  
Lazaros Tsikritzis ◽  
Theodoros Kevrekidis ◽  
Elisavet Amanatidou
Keyword(s):  
Water Quality ◽  
Quality Indices ◽  
Water Quality Indices ◽  
Physico Chemical ◽  
Chemical Water

scholarly journals Increasing the Efficiency of Pollutants Removal from Municipal Wastewater Using Biological Filters

2019 ◽  
Vol 69 (12) ◽  
pp. 3553-3556
Author(s):  
Mariana Mincu ◽  
Maria Iuliana Marcus ◽  
Mihaela Andreea Mitiu ◽  
Natalia Simona Raischi
Keyword(s):  
Municipal Wastewater ◽  
Oxygen Demand ◽  
Filling Material ◽  
Biological Filtration ◽  
Physico Chemical ◽  
Treatment Facilities ◽  
Pollutants Removal ◽  
Wastewater Samples ◽  
Chemical Water ◽  
Biological Filters

Biological filters are wastewater treatment systems that contain a granular filling material, which form an active biological film that contribute to the biooxidation of impurities from the wastewater. Recent research in the field aimed to improve the classical treatment facilities with aerobic fixed film by using inexpensive and easily accessible materials as filterable loading. Experiments have been carried out on biological filters loaded with volcanic tuff, with a diameter between 20-100 mm, supplied with municipal wastewater from primary settling. The biological filtration efficiency has been etablished throughout the continuous functioning of the experimental installation by physico-chemical water analysis. The analyzed indicators have been the ones stipulated by the legislation in force, namely: pH, chemical oxygen demand (COD), biochemical oxygen demand (BOD5), total suspended matter (TS), total nitrogen (TN), total phosphorus (TP), etc. The analysed wastewater samples have been average samples. The treatment efficiency have been calculated in various hypotheses, depending on the: installation capacity, hydraulic loading, organic loading.

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