scholarly journals Geochemical Variability of Surface Sediment in Post-Mining Lakes Located in the Muskau Arch (Poland) and Its Relation to Water Chemistry

2021 ◽  
Vol 232 (3) ◽  
Author(s):  
Michał Gąsiorowski ◽  
Jacek Stienss ◽  
Elwira Sienkiewicz ◽  
Ilona Sekudewicz
Keyword(s):  
Underground Mining ◽  
Chemical Compositions ◽  
Monte Carlo Test ◽  
Water Parameters ◽  
Ph Values ◽  
Water And Sediment ◽  
Mining Lakes ◽  
Water Ph ◽  
Physical And Chemical ◽  
Chemical Water

AbstractWater and sediment chemical compositions were investigated in 75 post-mining lakes in the eastern part of the Muskau Arch region (Western Poland, Central Europe). The lakes, originating from lignite and clay surfaces and underground mining activity, exhibited a wide gradient of physical and chemical water parameters. The most pronounced variability in water parameters was observed in pH values, conductivity, and oxygen concentration in the mixolimnion and monimolimnion. In addition, the lakes varied in terms of their trophic status, indicated by their dissolved organic carbon (DOC) and phosphorous concentrations. In general, lakes with higher pH values had higher trophic states, and some even exhibited hypertrophic conditions. The Monte Carlo test indicated that the water pH, phosphorus, DOC, and silicon concentrations could significantly explain the chemical characteristics of sediments.

scholarly journals DETECTION OF POLYCYCLIC AROMATIC HYDROCARBONS COMPOUNDS CONCENTRATIONS AND THEIR FATE IN TIGRIS RIVER WITHIN BAGHDAD CITY - IRAQ.

2019 ◽  
Vol 50 (Special) ◽  
Author(s):  
Khalaf & et al.
Keyword(s):  
Molecular Weight ◽  
Anthropogenic Activities ◽  
Dry Season ◽  
Wet Season ◽  
Tigris River ◽  
Water And Sediment ◽  
Polycyclic Aromatic ◽  
Physical And Chemical ◽  
Chemical Water

The objective of this study was to investigate concentrations, compositions of PAHs and to study physical and chemical water characteristic in Tigris River. This study was conducted during July 2017 to April 2018. The results showed that twelve PAHs compounds were detected in water and sediment of the river and the highest concentrations of these compounds were founded in sediment samples. Concentrations of PAHs in water samples have a ranged between (0.36µg. l-1) in wet season to (0.53µg.l-1) in dry season, while the sediment sample have a ranged between (633.23µg.kg-1) in wet season to (778.28µg.kg-1) in dry season. The origin of PAHs in water and sediment were pyrogenic depending on the ratios of Phenanthene/Anthracene, Anthacene/ (Anthacene + Phenanthene), low molecular weight/high molecular weight. According of these results, it can be concluded that the Tigris River is polluted with the PAHs, and anthropogenic activities with the largest impact on the water health and quality of the river.

scholarly journals Water Resource use and Management, Determination of Physical-Chemical Water Parameters in Radonique Lake

2018 ◽  
Vol 34 (4) ◽  
pp. 1774-1778
Author(s):  
Adem Dreshaj ◽  
Bedri Millaku
Keyword(s):  
Heavy Metals ◽  
Resource Use ◽  
Water Quality Monitoring ◽  
International Standards ◽  
Chemical Parameters ◽  
Water Parameters ◽  
To Come ◽  
Physical And Chemical ◽  
Chemical Water

This paper aims to reach clear conclusions and conclusions about the importance of management in increasing water quality, monitoring wind, taste and color, and so on. . Studies have been carried out in Radoniq Lake, monitoring physical and chemical parameters as well as heavy metals. Research results have been successful since we have managed to come up with concrete results and conclusions about what it is aimed at. Normally, heavy metals are defined in some locations such as : H-1, H-2, H-3, H-4, H-5 (Fe, Mn, Al, NO 3, NO 2, NH 4+). So the management of water resources has an irrefutable importance in achieving the desired performance on the market, which has also been proven by scientific research, the results of which will appear in some cases exceed international standards.

scholarly journals Water Quality and Dynamic of Schistosomiasis Intermediate Host Snails in the Lake Areas, District of So-Ava, Southern Benin

2018 ◽  
Vol 6 (6) ◽  
Author(s):  
Moudachirou Ibikounlé1 ◽  
Ablavi A. Onzo-Aboki ◽  
Elokou Alabi ◽  
Samoussou Dine Mahama ◽  
Samoussou Dine Mahama ◽  
...  
Keyword(s):  
Water Quality ◽  
Intermediate Host ◽  
Oxygen Demand ◽  
Control Programme ◽  
Freshwater Snails ◽  
Intermediate Hosts ◽  
Water Parameters ◽  
Physico Chemical ◽  
Physical And Chemical ◽  
Chemical Water

Objectives: Urinary schistosomiasis is known to be endemic in the lake Nokoué areas of the District of So-Ava. For the past ten years, the National Control Programme for Communicable Diseases of the Ministry of Health has been making efforts to control schistosomiaisis morbidity through mass drug treatment with Praziquantel. This study aimed to assess the diversity and dynamic of potential snails known as schistosomiasis intermediate hosts. Methodology and Results: This study was carried out for 12 months (from July 2015 to June 2016) and consisted in the periodical analysis of the physical and chemical water parameters (temperature, oxygen concentration, pH, nitrite and nitrate rates. Salinity, total dissolved solids (TDS) and, biochemical oxygen demand) in relation with diversity, distribution and relative abundance of freshwater snails (Bulinus forskalii, B. globosus and B. truncatus). To this end, seven harvesting sites on Lake Nokoué were, reasonably selected for monthly hydrobiological and malacological data monitoring. The results showed a variable correlation between the dynamic of schistosomiasis intermediate host snailsm and several physico-chemical water parameters. Bulinus globosus was negatively influenced by salinity and nitrate rates while B. forskalii was negatively influenced by pH, Oxygen, TDS, salinity and nitrate rates. The three species of freshwater snails were strongly influenced by the water temperature. Conclusion: The results suggest a seasonal schistosome transmission induced by the seasonal dynamic of intermediate host snails. Water quality seems appropriate to the development of host snails from December to March and would be the strong period of schistosomiasis transmission. However, furthermore studies will need for well understanding the dynamic transmission necessary for developing adapted strategy control.

scholarly journals Stability of Hydrocortisone Preservative-Free Oral Solutions

2015 ◽  
Vol 20 (3) ◽  
pp. 197-202
Author(s):  
Julie Chappe ◽  
Névine Osman ◽  
Salvatore Cisternino ◽  
Jean-Eudes Fontan ◽  
Joël Schlatter
Keyword(s):  
Microbial Growth ◽  
Storage Conditions ◽  
Oral Solution ◽  
Initial Concentration ◽  
Ph Values ◽  
Water Ph ◽  
Physical And Chemical ◽  
And Storage ◽  
Preservative Free ◽  
Storage Temperatures

OBJECTIVES: The physical and chemical stability of a preservative-free oral solution of hydrocortisone succinate was studied at different pH values and storage temperatures. METHODS: Oral solutions of hydrocortisone 1 mg/mL were prepared by dissolving hydrocortisone succinate powder in citrate buffers at pH 4.0, 5.5, and 6.5, or with sterile water (pH 7.4) stored in amber glass vials. Three identical samples of the formulations were prepared and stored under refrigeration (3–7°C), ambient temperature (20–22°C) and high temperature (29–31°C). A 200-μL sample was withdrawn from each of the 3 samples immediately after preparation and at 1, 7, 14, 21, and 35 days. Samples were assayed in duplicate using stability-indicating liquid chromatography. Stability was determined by evaluating the percentage of the initial concentration remaining at each time point; stability was defined as the retention of at least 90% of the initial concentration of hydrocortisone succinate. RESULTS: At least 92% of the initial hydrocortisone succinate concentration in solutions pH 5.5, 6.5, and 7.4 remained throughout the 14-day study period under refrigeration. There were no detectable changes in color, odor, or pH and no visible microbial growth in these samples. In other storage conditions, hydrocortisone succinate was rapidly degraded. CONCLUSIONS: The hydrocortisone succinate preservative-free oral solutions at pH 5.5, 6.5, or 7.4 are chemically stable when stored under refrigeration for at least 14 days. They provide flexible and convenient dosage forms without any preservatives for pediatric patients.

Vertical micro-distribution of psammonic ciliates and their relationship to physical and chemical parameters in two lakes of different trophic status

2012 ◽  
Vol 41 (2) ◽  
Author(s):  
Tomasz Mieczan ◽  
Dorota Nawrot
Keyword(s):  
Surface Layer ◽  
Community Structure ◽  
Species Diversity ◽  
Trophic Structure ◽  
Trophic Status ◽  
Chemical Parameters ◽  
Water Parameters ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical ◽  
Chemical Water

AbstractThe aim of this study was to examine the community structure and vertical micro-distribution of psammonic ciliates in two lakes of different trophic status in eastern Poland. Additionally, the size and trophic structure of these microorganisms, and the influence of physical and chemical water parameters on their abundance, were analysed. Psammon samples were collected during spring, summer, and autumn of 2010. In each of the lakes samples were collected in the euarenal, higroarenal, and hydroarenal zones of the psammolittoral. In order to determine the micro-vertical distribution of ciliates, each sample was divided into two sub-samples: the upper part (0–1cm) and the lower part (1–2cm). The species diversity of ciliates decreased with depth. The tendency was particularly clear in mesotrophic lakes. Irrespective of the lake’s trophic type and arenal zones, significantly higher numbers and biomass of ciliates were recorded in the surface layer of the psammolittoral. The upper layer of sand was dominated by omnivorous taxa, whereas the deeper layer showed increases in the proportions of bacterivore species. The factors limiting the occurrence of ciliates are mainly concentrations of total organic carbon and nutrients.

scholarly journals Horizontal Distribution of Psammonic Ciliates in Two Lakes of Different Trophic Status: Relationship to Physical and Chemical Parameters

2012 ◽  
Vol 38 (2) ◽  
pp. 55-70
Author(s):  
Tomasz Mieczan ◽  
Dorota Nawrot
Keyword(s):  
Trophic Status ◽  
Eutrophic Lake ◽  
Horizontal Distribution ◽  
Chemical Parameters ◽  
Eutrophic Lakes ◽  
Water Parameters ◽  
Mesotrophic Lake ◽  
Physical And Chemical Parameters ◽  
Physical And Chemical ◽  
Chemical Water

Horizontal Distribution of Psammonic Ciliates in Two Lakes of Different Trophic Status: Relationship to Physical and Chemical ParametersThe aims of this study were to identify the taxonomic diversity and abundance of psammonic ciliate communities in mesotrophic and eutrophic lakes (Łęczna-Włodawa Lakeland, eastern Poland). The effect of selected physical and chemical water parameters on ciliates community was also analysed. Psammon samples were collected during three seasons: spring, summer and autumn of 2010. In each lake, in the psammolittoral, samples were collected in the euarenal, higroarenal, and hydroarenal zones. A total of 53 ciliate taxa were recorded. The highest value of the Shannon-Weaver index was recorded in summer in eutrophic lake (2.79). At the same time in mesotrophic lake, a lower value of the index was determined (0.79). The mean numbers of ciliates ranged from 516 ind.cm-3in the eutrophic lake to 191 ind. cm-3in the mesotrophic lake. In eutrophic lake, the highest number of ciliates was recorded in the euarenal (649 ind. cm-3), and the lowest in the higroarenal (425 ind. cm-3). In the mesotrophic lake, the highest average numbers were determined in the higroarenal (235 ind. cm-3), and the lowest in the hydroarenal (155 ind. cm-3). Irrespective of the lake trophy, Hymenostomata (Paramecium sp., Glaucoma sp., Uronema nigricans) occurred in the highest numbers (from 13 to 95%). The results demonstrated that N-NH4, P-PO4and TOC can strongly regulate the abundance and taxonomic composition of ciliates. The strongest correlations between numbers of ciliates and physical and chemical water parameters were observed in the higro- and hydroarenal zones of the eutrophic lake.

scholarly journals Identifikasi kawasan penangkapan induk udang windu (Penaeus monodon) pada perairan pesisir Kabupaten Aceh Jaya

2014 ◽  
Vol 1 (1) ◽  
pp. 53
Author(s):  
Munawar Khalil ◽  
Zulfikar Zulfikar ◽  
Saifullah Saifullah
Keyword(s):  
Penaeus Monodon ◽  
Environmental Aspects ◽  
Chemical Parameters ◽  
Water Parameters ◽  
Catchment Areas ◽  
Tiger Prawn ◽  
Information System Technology ◽  
Physical And Chemical ◽  
Survey Approach ◽  
Chemical Water

Tujuan penelitian ini adalah untuk menetapkan kawasan penangkapan induk udang windu (Penaeus monodon) dan kondisi lingkungan perairannya ditinjau dari aspek fisika kimia perairan pada kawasan perairan kabupaten Aceh Jaya. Penelitian ini menggunakan pendekatan survey dan teknologi system informasi geografis. Kawasan penangkapan induk udang di Kabupaten Aceh Jaya pada umumnya terdapat pada titik ordinat: (1) H 950 34’ bujur timur dan 040 38’ lintang utara, (2) H 950 33’ bujur timur dan 040 39’ lintang utara, (3) H 950 34’ bujur timur dan 040 40’ lintang utara, (4) H 950 34’ bujur timur dan 040 33’ lintang utara. Parameter fisika kimia perairan yang diukur pada kawasan penangkapan induk udang menunjukkan kondisi yang sangat sesuai bagi sistem kehidupan udang.The aims of this study was to establish the broodstock catchment areas of tiger prawn (Penaeus monodon) and the condition of the waters which was surrounding their habitat in terms of environmental aspects of physical chemical water parameter in the coastal waters of Aceh Jaya region. This study used survey approach and geographic information system technology as methodelogy. The catching areas of broodstock in Aceh Jaya region commonly found on the ordinate point: (1) H 950 34' east longitude and 040 38' north, (2) H 950 33' east and 040 39' north, (3) H 950 34' east and 040 40' north, (4) H 950 34' east and 040 33' north. Physical and chemical parameters of water measured at catchment areas showed that the water parameters in the prawn habitat were very suitable for supporting of tiger prawn living.

scholarly journals Natural Radioactivity in Thermal Waters: A Case Study from Poland

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 541
Author(s):  
Chau Nguyen Dinh ◽  
Jakub Nowak
Keyword(s):  
Natural Radioactivity ◽  
Transport Model ◽  
Thermal Waters ◽  
Chemical Compositions ◽  
Wide Range ◽  
Physical And Chemical ◽  
Radium Activity ◽  
Hydrochemical Types ◽  
Chemical Water

A natural radioactivity in thermal water was investigated based on 19 selected thermal waters from Poland. The analysed results show that the radionuclides’ concentrations in the study waters vary over a wide range. The temperature of the waters varies from above 20 °C to above 80 °C. The waters are characterised by different mineralisation, chemical compositions, and belong to different hydrochemical types. There is a good correlation between the water temperature and the depths of the aquifer formations occurrence, suggesting the thermal energy originates from the thermal geogradient. The concentration of radium is well correlated with the water mineralisation. The ratio of radium activity (226Ra/228Ra) in groundwater relates not only the ratio of uranium activity to that of thorium (238U/232Th) in aquifer formation, but also depends on the physical and chemical water properties. Based on the concentration of radon and its transport model, the radiation exposures due to inhalation of 222Rn and its progeny for employees and clients of the spa were assessed. The use of the thermal waters as a drinking resource may be problematic due to the possibility of exceeding the recommended annual committed effective dose 0.1 mSv.

A COMPARISON OF HPLC ANALYSIS OF NITRATE IN SOILS WITH THE PHENOLDISULFONIC ACID AND HYDRAZINE SULFATE METHODS

1986 ◽  
Vol 66 (1) ◽  
pp. 151-157 ◽  
Author(s):  
T. C. KUCHNICKI ◽  
G. R. B. WEBSTER
Keyword(s):  
Mobile Phase ◽  
High Performance ◽  
Hplc Method ◽  
Chemical Compositions ◽  
Hydrazine Sulfate ◽  
Reverse Phase ◽  
Silver Sulfate ◽  
Water Ph ◽  
Nitrate Analysis ◽  
Physical And Chemical

Six Manitoba soils of varying physical and chemical compositions were used to determine the efficiency of nitrate analysis by high-performance liquid chromatography (HPLC). The nitrate was extracted with distilled water and the extract was analyzed with a reverse phase column using a mobile phase of 1:1 methanol-water, pH 3.0. In five soils, the HPLC method of nitrate analysis resulted in near 100% recovery of added nitrate. An average 90.2% recovery was obtained with the hydrazine sulfate method using sodium bicarbonate, pH 8.5, as the soil extractant. Variable recoveries were obtained with the phenoldisulfonic acid method using a silver sulfate-copper sulfate extractant. Key words: HPLC, nitrate analysis, soil

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