scholarly journals Physical-chemical properties of the surface water from shallow lakes of the Matita-Merhei Unit, Danube Delta, Romania: current state and environmental significance

2021 ◽  
Vol 3 (2) ◽  
pp. 23-31
Author(s):  
Irina Catianis ◽  
◽  
Dumitru Grosu ◽  
Adriana Maria Constantinescu ◽  
Laura Tiron Dutu ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Environmental Parameters ◽  
Biological Indicators ◽  
Repeated Measurements ◽  
Danube Delta ◽  
Potential Health ◽  
Local Conditions ◽  
Physical Chemical ◽  
Quality Of Water

This study aimed to assess the water quality of certain lakes (Bogdaproste, Trei Ozere and Radacinos) belonging to the Danube Delta, Romania. Deltaic ecosystems are subject to natural and man-made environmental stressors. If in the past these ecosystems were largely threatened by eutrophication and organic/inorganic pollution, nowadays, we must focus on hydro morphological impact. This refers to the physical character and water content of the aquatic environment, impoundment (dams and flood gate), channelization and embankments, as well as clog/siltation of lakes. Environmental parameters are those physical, chemical and biological indicators used to characterize a freshwater body, and, which vary in time and space. In this regard, 44 water samples were collected in the dry season from the three lakes, for analysis of physical-chemical quality indicators. A series of physical (T, EC, TDS, turbidity, TSS, transparency) and chemical parameters (pH, DO, nutrients, SiO2, TOC, SO42-, ORP, technophilic elements) were considered. The results obtained in the physical-chemical analyses revealed that the majority of parameters were found in line with enforcing environmental regulations. Despite that, P-PO43- and Cd concentration results of some samples were found above certain permissible limits set by the normative. Probably, these inadvertences can be associated with local conditions of the transitional deltaic environment. Further analysis is required conducting repeated measurements with the same question, meaning a routine monitoring, especially P-PO43- and Cd. Finally, it was concluded that the results of this study showed a good quality of water in investigated lakes that did not pose potential health and environmental problems related to the biota.

scholarly journals Measures for Improving the Quality of Watercourses in the Impact Area of the Baia Mare Industrial Perimeter

2013 ◽  
Vol 70 (2) ◽  
pp. 403-407
Author(s):  
Oana MARE ROȘCA ◽  
Lucia MIHALESCU ◽  
Zorica VOȘGAN ◽  
Monica MARIAN
Keyword(s):  
Environmental Parameters ◽  
Industrial Area ◽  
Aquatic Communities ◽  
Aquatic Life ◽  
Local Conditions ◽  
Quality Of Water ◽  
Baia Mare ◽  
Impact Area ◽  
The Impact

The Baia Mare industrial area is located in the Baia Mare Depression (NW Romania). The main source of impact on the watercourses of the Baia Mare industrial area is the exploitation of non-ferrous ores that, over time, a number of changes generated in the environmental parameters. The main drainage axis of the above noted industrial center is formed by the Săsar River and the Firiza River. Since the response of the aquatic communities to the environmental factors best reveal the local conditions; the zoobenthos communities in 10 stations located in the Săsar basin were analyzed during 2003-2009. Contributions to improving the quality of water contaminated by the industrial effluents.    In the conditions of limiting disturbances that block the detoxification and self-purification processes, there are prerequisites for improving the quality of aquatic life.

scholarly journals The Effect of Coating as Antifungi of Harumanis Mango's Post Harvest Losses

2020 ◽  
Vol 1 (2) ◽  
pp. 7-16
Author(s):  
Winda Amilia ◽  
Andrew Setiawan Rusdianto ◽  
Arma Dwi Novemi
Keyword(s):  
Corn Starch ◽  
Chemical Properties ◽  
Inhibition Zone ◽  
Post Harvest ◽  
Physical Chemical ◽  
Chemical Content ◽  
Total Dissolved Solid ◽  
Tobacco Extract ◽  
Physical And Chemical

The amount of mango production in Indonesia is quite high, but the quality of postharvest mangoes is still quite low. The quality of the fruit will decline due to contamination; one of the contaminants is fungi. The way to reduce the damage of postharvest products is by coating applications. The purpose of this study was to study the physical, chemical and antifungal activities of harumanis mangoes’s quality which had been given coating during storage that could cause postharvest losses of harumanis mangoes. There are 3 treatments, each of them are respectively the provision of corn based coating  6% tobacco extract, 8% tobacco extract and 10% tobacco extract. The physical and chemical properties of the antifungal coating of tobacco extract made from corn coating for post-harvest damage on harumanis mangoes were obtained by weight loss, texture, colour, respiration rate, vitamin C and total dissolved solid. Preventing coating can prevent damage after harvest and protect the harumanis mango; therefore the quality of the mangoes can be maintained. The best results from the priority with the largest diameter inhibition zone were given corn starch 10% tobacco extract. Then the higher the concentration of extract used, the greater the diameter of the inhibition zone obtained. Based on all the tests performed (physical, chemical, and antifungal) the best treatment from the treatment was obtained that consisted of mangoes with antifungal layers of corn starch 10% tobacco extract. Because the P3 obtained the best results in maintaining physical, chemical content and fungi for 15 days.

scholarly journals The impact of coal ash and slag dump on the quality of surface and ground waters - a case study

2019 ◽  
Vol 84 (5) ◽  
pp. 527-530
Author(s):  
Ivana Cipranic ◽  
Radmila Markovic ◽  
Stefan Djordjievski ◽  
Zoran Stevanovic ◽  
Marija Stevanovic
Keyword(s):  
Water Samples ◽  
Coal Ash ◽  
Negative Influence ◽  
Physical Treatment ◽  
Physical Chemical ◽  
Quality Of Water ◽  
Slag Dump ◽  
The Impact

This paper presents the assessment of the impact of coal ash and slag from the ?Maljevac? dump on the quality of water of Paleski Creek, Montenegro. The obtained results confirm the negative influence of surface and groundwater from the dump on the water from the Paleski Creek. The results obtained by testing of the water samples, collected from Paleski Creek upstream of the dump, indicate that the water is qualified to be used for drinking, after simple physical treatment and disinfection. The results obtained for the water samples collected from the Paleski creek downstream from the dump indicate that the water could be safe for drinking only after the treatment that requires an intensive physical, chemical and biological processing, including some extended treatment.

Integrated analysis of the quality of water bodies from the lower Paraná River basin with different productive uses by physicochemical and biological indicators

2020 ◽  
Vol 263 ◽  
pp. 114434
Author(s):  
Julieta Peluso ◽  
Carolina M. Aronzon ◽  
María del Carmen Ríos de Molina ◽  
Dante E. Rojas ◽  
Diego Cristos ◽  
...  
Keyword(s):  
River Basin ◽  
Biological Indicators ◽  
Paraná River ◽  
Water Bodies ◽  
Integrated Analysis ◽  
Parana River ◽  
Quality Of Water ◽  
Paraná River Basin

scholarly journals Anthropogenic Lakes in Czechia

Geografie ◽  
2005 ◽  
Vol 110 (3) ◽  
pp. 210-228
Author(s):  
Tomáš Hrdinka
Keyword(s):  
Chemical Properties ◽  
Lake Basin ◽  
Genetic Groups ◽  
Quality Of Water ◽  
Agriculture Industry ◽  
Number Of Factors ◽  
Nature Preservation ◽  
Physical And Chemical ◽  
And Chemical Properties

Anthropogenic lakes constitute one of the most significant genetic groups of lakes in Czechia. The water quality of these lakes formed through flooding of mined-out pits can be influenced by a number of factors such as physical and chemical properties of exploited rock, characteristics of the mine surroundings, secondary anthropogenic interference and time elapsed since their flooding. The quality of water determines their potential utilization, such as in water supply, agriculture, industry, recreation, nature preservation, etc. This article compares five anthropogenic lakes in mining pits after exploitation of different kind of rocks and on the basis of lake basin characteristics and physical and chemical analysis of water formulates the possibilities of their potential utilization in the context of the local landscape.

scholarly journals Temporal Variation of Drinking Water Quality Parameters for Sulaimani City, Kurdistan Region, Iraq

2020 ◽  
Vol 4 (2) ◽  
pp. 99
Author(s):  
Yaseen Ahmed Hamaamin ◽  
Jwan Bahadeen Abdullah
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Samples ◽  
Chemical Properties ◽  
Quality Parameters ◽  
Drinking Water Quality ◽  
World Health ◽  
Quality Of Water ◽  
Physical And Chemical

Water is vital for all forms of life on earth. Assessing the quality of water especially drinking water is one of the important processes worldwide which affect public health. In this study, the quality of drinking water in Sulaimani City is monitored for a study period of 1 year. A total number of 78 water samples were collected and analyzed for 17 physical and chemical properties of water supply system to the city. Samples of water are collected from the three main sources of drinking water for Sulaimani City (Sarchnar, Dukan line-1, and Dukan line-2) from February to August 2019. The results of physical and chemical parameters of collected water samples were compared with the World Health Organization and Iraqi standards for drinking water quality. The results of this study showed that mostly all parameters were within the standards except the turbidity parameter which was exceeded the allowable standards in some cases. This research concluded that, in general, the quality of drinking water at the three main sources of Sulaimani City is suitable and acceptable for drinking.

scholarly journals Evaluation of the drinking water treatment system (STAP) San Fernando –Los Patios urbanization, Colombia. Efficiency and quality

2020 ◽  
Vol 19 (4) ◽  
pp. 149-156
Author(s):  
Yusbely Cecilia Castrillón-Jaimes ◽  
Carlos Humberto Acevedo-Peñaloza ◽  
Jhan Piero Rojas-Suárez
Keyword(s):  
Drinking Water ◽  
Social Protection ◽  
Drinking Water Treatment ◽  
Human Consumption ◽  
Chemical Analyses ◽  
Physical Chemical ◽  
Quality Of Water ◽  
Microbiological Parameters ◽  
San Fernando

The quality of water for human consumption in the municipality of Los Patios in Colombia, depends 60% of the treatment systems for drinking water (STAP) independent, these are adapted according to the population that conforms in 2014 and own resources. Urbanization San Fernando carries out the treatment in an efficient way guaranteeing the quality of water for human consumption, therefore, the field study is based on a quantitative approach and a method that describes the results of the analysis of the samples taken at the entrance and exit of the STAP, to evaluate the efficiency and quality of the system the sample is characterized from the analysis of the physical-chemical and microbiological parameters at the entrance and exit of the system in the Water Laboratory of the Universidad Francisco de Paula de Santander. The physical and microbiological results identify the efficiency of the system and the operator, indicating the quality of the water by the values in the parameters measured according to Decree 1575 of 2007 and 1525 of 2007 by the Ministry of Social Protection in Colombia. The chemical analyses detected a high percentage of calcium hardness in the sample at the system outlet, which is reportedto the directors of the urbanization. In accordance with this, the relevant controls and monitoring are carried out in the process for the purification and consumption of water, without neglecting the habits of water storage by the community in each home.

scholarly journals Characterization of physical, chemical and microstructure properties in the soft clay soil of the paddy field area

2021 ◽  
Vol 18 (1) ◽  
pp. 81
Author(s):  
Muhammad Rendana ◽  
Wan Mohd Razi Idris ◽  
Sahibin Abdul Rahim ◽  
Zulfahmi Ali Rahman ◽  
Tukimat Lihan
Keyword(s):  
Paddy Field ◽  
Clay Soil ◽  
Soil Aggregates ◽  
Soft Clay ◽  
Chemical Properties ◽  
Silty Clay ◽  
Physical Chemical ◽  
Physical And Chemical ◽  
Field Area

<p>The soft clay soil has been categorized as infertile soil. The occurrence of soft clay soil in paddy field areas can decline soil quality and rice production. Therefore, to find the best technique for amending this soil, this study aimed to analyze the physical, chemical, and microstructure properties of the soft clay soil in the paddy field area. The soft clay soil samples were collected from two paddy blocks in Kedah, Malaysia. The physical and chemical properties of the soil were determined using the standard method in the laboratory. The microstructure properties were analyzed using Zeiss SUPRA 55VP microscopes. The results found that the soft clay soil was composed of silt – clay (&gt; 90%) with the texture of silty clay. The soft clay soil was characterized by low values of organic matter (2.63-3.42%), pH (3.32-3.69), cation exchange capacity (6.89-8.72 cmol<sub>c</sub> kg<sup>-1</sup>), available P (0.14-0.41 mg kg<sup>-1</sup>), aggregate stability (16.53-17.78%), and hydraulic conductivity (0.17 cm hr<sup>-1</sup>). In contrast, it indicated high values of soil water content (42.24-43.21%), and exchangeable Na<sup>+</sup> ions (2.48-2.50 cmol<sub>c</sub> kg<sup>-1</sup>). In addition, the analysis of heavy metals content revealed that their concentrations were below the critical level in the soil. The soft clay soil was largely governed by kaolinite minerals, and it had less compact structures with many large voids among soil aggregates. In conclusion, the quality of soft clay soil in the study area was poor with low physical and chemical parameters. The quality of the soil could be improved by the addition of soil amendments such as zeolite, cement, and other additive materials to absorb the excess water in the soil and increase the soil strength.</p>

scholarly journals Inadequate riparian zone use directly decreases water quality of a low-order urban stream in southern Brazil

2020 ◽  
Vol 15 (2) ◽  
pp. 1
Author(s):  
Enzo Luigi Crisigiovanni ◽  
Elynton Alves do Nascimento ◽  
Rodrigo Felipe Bedim Godoy ◽  
Paulo Costa de Oliveira-Filho ◽  
Carlos Magno de Sousa Vidal ◽  
...  
Keyword(s):  
Water Quality ◽  
Urban Space ◽  
Surface Waters ◽  
Riparian Forest ◽  
Biological Indicators ◽  
Urban Stream ◽  
Physical Chemical ◽  
Association Design

 Considering the current importance watercourses quality conservation, it is important to establish relationships between parameters that enable evaluation of the origins of changes in water quality, allowing actions to mitigate them. However, it is important to improve the association of different variables and to take sufficient samples. This study associates usual techniques and parameters to analyse the water quality of an urban river from Paraná State, Brazil. For this, we used biological indicators (aquatic macroinvertebrates), physical-chemical (temperature, turbidity, true colour, pH, DO and BOD5,20) indicators and microbiological (faecal and total coliforms) indicators. These indicators were related to land use and occupation classes obtained from high resolution QuickBird 2 images. For this association, the surroundings (450 meters buffer) of three distinct points of the river were considered: I. Near the spring; II. In the downtown city; and III. In a residential neighbourhood. Different values of physical, chemical and microbiological variables were detected along the river, showing evident relationships between them and with the use and occupation of the urban and peri-urban space in the characterization of surface waters. The association design was able to detect the landscape effect on water quality in a coherent way and that these connections were mainly related to suppression of the riparian forest present in the surroundings, further demonstrating the importance of this vegetation for the maintenance of watercourse quality.

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