Temat: Physico-chemical Parameters - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Synthesis and Physico-chemical Studies of Base Catalyzed Methanolysis of Some Virgin Tropical Seed Oils
Autorzy:: Esonye, Chizoo
Onukwuli, Okechukwu Dominic
Ofoefule, Akuzuo Uwaoma
Powiązania:: https://bibliotekanauki.pl/articles/1113573.pdf
Data publikacji:: 2017
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Extraction
Physico-chemical Parameters
Transesterification; Biodiesel
Vegetable oils
Opis:: The physico-chemical characterization of Prunus amygdalus, Dacryodes edulis and Chrysophillum albidium seed oils were investigated, together with their methyl esters. The vegetable oils were extracted by applying the solvent extraction method, using n-hexane. Prunus amygdalus had the highest oil yield (60.1%), followed by Dyacrodes edulis (55.76 %) and least from Chrysophillum albidium (13.67%). The oils and their biodiesel were then analyzed for acid value, free fatty acid, specific gravity, ash content, iodine value, peroxide value, saponification value, kinematic viscosity, flash point, smoke point, titre value, cloud point, moisture content and refractive index. Accordingly, Dyacrodes edulis seed oil had the highest acid value of 6.57 and required two-step transesterifictaion. The produced biodiesels were discussed in the light of ASTM D 9751, ASTMD 6751 and DIN 14214. These showed yields of 94.36%, 93.03% and 86.49%, cetane numbers of 70.40, 55.20 and 64.57 and calorific values of 31,178.39 KJ/kg, 34,421.50 KJ/kg and 32,838.38 KJ/kg for Prunus amygdalus, Dacryodes edulis and Chrysophyllum albidium, respectively. Other fuel-related properties showed highly improved qualities upon transesterification and compared well with ASTM and EU standards. The overall results showed that the seed oils are viable for biodiesel production.
Źródło:: World News of Natural Sciences; 2017, 15; 112-128
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Assessment of the Actual Status of the Cikapundung River Waters in the Densely-Inhabited Slum Area, Bandung City
Autorzy:: Rusdiyanto, Edi
Sitorus, Santun R. P.
Noorachmat, Bambang Pramudya
Sobandi, Ramalis
Powiązania:: https://bibliotekanauki.pl/articles/2028189.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: densely inhabited slum
microbiological parameters
physico-chemical parameters
water quality
Opis:: This research was intended to analyze the water quality of the Cikapundung River in Bandung City around the densely-inhabited slums and also to analyze the total number of bacteria coliform and Escherichia coli in the Cikapundung River, Bandung City. The research data was obtained by observing and performing a laboratory analysis through the assessment of environmental quality standard threshold based on the Government Regulation (PP) No. 82 of 2001. The results of laboratory analysis show that the actual condition of water quality of the Cikapundung River is overall classified as polluted, indicating 7 microbiological and physico-chemical parameters which have exceeded the quality standard such as: TSS, DO, BOD, COD, detergent/surfactant, total coliform, and Escherichia coli. In the upper part, there are 6 parameters below the quality standard, consisting of 4 physicochemical parameters and 2 microbiological parameters. In the middle part, there are 8 parameters below the quality standard consisting of 6 physico-chemical parameters and 2 microbiological parameters. In the lower part, there are 6 parameters that exceeded the quality standard consisting of 4 physico-chemical parameters and 2 microbiological parameters. The seasonal difference of parameters averagely has shown that the water quality in the rainy season is better than in the dry season. However, on average, the water sampling taken before flowing to the village has a better quality than past the village.
Źródło:: Journal of Ecological Engineering; 2021, 22, 11; 198-208
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Evaluation of shallow groundwater suitability for irrigation purposes : A case study from Doornfontein area, South Africa
Autorzy:: Moges, Simeneh S.
Dinka, Megersa O.
Powiązania:: https://bibliotekanauki.pl/articles/28411663.pdf
Data publikacji:: 2023
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: irrigation
Johannesburg
physico-chemical parameters
shallow groundwater
water quality
Opis:: The present study aims at evaluating the quality of shallow groundwater (SGW) and its suitability for irrigation purpose in the most urbanised part of Johannesburg city, South Africa. The SGW samples were collected in three consecutive years and analysed for 20 selected physicochemical parameters, and heavy metals. The results were compared with the South African water quality, and Food and Agricultural Organization irrigation water quality guidelines, and standard indices derived from laboratory outputs. The results of the study show that all physiochemical parameters and heavy metals were within the limits set by both guidelines for irrigation purposes, except for potassium (3.58 mg∙dm-3) and manganese levels (3.152 mg∙dm-3). The calculated irrigation parameter values of sodium adsorption ratio (SAR), sodium percentage (Na%), residual sodium carbonate (RSC), magnesium hazard (MH), Kelly’s ratio (KR) and permeability index (PI) were within the permissible range of irrigation water quality standards. The findings of this study provide helpful information for decision-makers such as utilisation of the studied groundwater for irrigation uses.
Źródło:: Journal of Water and Land Development; 2023, 58; 189--197
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analysis of the Impact of Ferronicel Industrial Activity on Drenica River Quality
Autorzy:: Abazi, Albona Shala
Gashi, Barie
Spahiu, Mimoza Hyseni
Bytyçi, Pajtim
Dreshaj, Adem
Powiązania:: https://bibliotekanauki.pl/articles/2173260.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: assessment
physico-chemical parameters
impact
industrial activity
Drenica river
Opis:: Today, environmental water degradation all over the world comes about due to the growth of urban, industrial and agricultural activities. As a result of these discharges without any prior treatment, the quality of river waters in Kosovo has deteriorated greatly. On the basis of the research that has been done so far in the rivers of Kosovo, it was shown that Drenica is one of the rivers that are constantly exposed to the discharge of industrial waters. Therefore, the purpose of this research was to analyze the impact of water discharged from Feronikeli on the water quality of the Drenica River and the possibility of its protection. The realization of this study is focused on the evaluation of physico-chemical parameters of the water of the Drenica River, the content of heavy metals in the water, the analysis and comparison of the results obtained using the standard for the assessment of the ecological status of surface waters of Romania (GD 161). Laboratory assays were developed according to standard analysis methods (APHA). The results obtained, analyzed and compared with the values of the parameters according to the standard referred to in this research, confirm that the water of the Drenica River belongs to the class of water with “good quality” only in the source area, while in other flow stations river, especially in the third station S3 (Ferronikel industrial zone), water has “poor quality”, passing into the category of “very poor quality”. Therefore, in order to improve the current situation, it is recommended to apply the best environmental practices and proper management of industrial waste.
Źródło:: Journal of Ecological Engineering; 2022, 23, 7; 312--322
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Physico-chemical parameter analysis of water in Musiri Taluk, Tamil Nadu, India
Autorzy:: Anbarasu, K.
Anbuselvan, G.
Powiązania:: https://bibliotekanauki.pl/articles/1119186.pdf
Data publikacji:: 2017
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Musiri
Physico-chemical parameters
Total hardness
Turbidity
Water quality
Opis:: An analysis of the physico-chemical parameters of ground and surface water of Musiri Taluk (Tamil Nadu, India) were carried out to study the quality of water and suitability for domestic purpose. Cauvery water, well water and bore wells are the water resources of the study area. The parameters included pH, EC, TDS, Turbidity, Total hardness and content of Fluoride, Sulphate and Chloride were also assessed and compared with the standard values prescribed by BIS. The present investigation revealed that the quality of water of Cauvery water is suitable for drinking purposes, but the well water and bore well water samples are unfit for drinking and utility purpose.
Źródło:: World News of Natural Sciences; 2017, 6; 28-35
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Spatial Variability Analysis of Some Groundwater Physico-Chemical Parameters in Parts of Akwa-Ibom State, Nigeria
Autorzy:: Emujakporue, Godwin O.
Ngwueke, Marcel I.
Powiązania:: https://bibliotekanauki.pl/articles/1191777.pdf
Data publikacji:: 2016
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Water analysis
Akwa Ibom
Physico-chemical parameters
Semi-variogram
Kriging
Opis:: The groundwater physico-chemical parameters of Parts of Akwa Ibom state and their spatial distribution have been examined in this study. The physico-chemical parameters analysed are Ph, total dissolved solids, electrical conductivity and water hardness. The average pH, electrical conductivity, water hardness and total dissolved solids obtained are 6.4, 163.4242 μS/cm, 83.81 mg/l and 90.5 mg/l respectively. The computed values are within the permissible limit set by World Health Organisation (WHO). Semi-variogram and ordinary kriging were used for the spatial distribution analysis. The semi variogram of the pH, total dissolved solids, electrical conductivity and water hardness were model with Gaussian, spherical, linear functions respectively. The pH map is dominated with values ranging from 6.2 to 6.6 while the total dissolved solids map is associated mainly with values ranging from 90 to 95 mg/l. The water hardness and electrical conductivity values increases from central part toward the west and eastern regions. The geostatical modelling has been used to estimate the values of the parameters at unsampled points.
Źródło:: World Scientific News; 2016, 50; 20-32
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: State Diagnosis of Macrozoobenthic Biodiversity in the Intertidal Zone of the Sandy Coast of Taghazout (Southwestern of Morocco)
Autorzy:: Haddad, Mohamed Ben
Lamine, Imane
Moukrim, Abdellatif
Bergayou, Hafida
Abou Oualid, Jaouad
Ait Alla, Aicha
Powiązania:: https://bibliotekanauki.pl/articles/1839588.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: Taghazout coasts
biodiversity
macro-zoobenthic structure
physico-chemical parameters
sediment
Opis:: The present work is a part of the impact study of the tourist resort "Taghazout Bay" installation on the coast of Taghazout (North of the Agadir bay). The purpose of this study was to assess the initial state of the macrozoobenthic structure present in the intertidal sands at the three study stations over the 2016 and 2017 seasons. The biological approach was accompanied by the study of some physico-chemical parameters of the seawater (temperature, pH, salinity and dissolved oxygen) and the study of the sediment (grading structure, classification, and contents in organic matter). PCA analysis identified a perfect correlation between the physico-chemical parameters. The sediment contains three grading classes only (medium sand, fine sand, and very fine sand), very well classified with normal proportions of organic matter. The study of intertidal benthic macrofauna of the sandy substrate shows ten species and spatiotemporal variations with a clear dominance of the Donax trunculus bivalve species. The authors noticed – from the DIMO model – that the variation profile of the spring and summer (2016 and 2017) shows a community dynamics called "Diversity type". In winter and in autumn, they are known as the "Evenness type". The rank-frequency diagram explains that the benthic community of Taghazout sandy coast exists in the stage "Pioneer 1". The ascending hierarchical clustering gave three logical gatherings of seasons. The faunistic structure of this benthic community revealed the M>C>P shape. The authors also noticed that there is diversity in regimes in this ecosystem.
Źródło:: Journal of Ecological Engineering; 2021, 22, 4; 126-137
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Elucidation of tidal spatial-temporal variation of physico-chemical and nutrient parameters of estuarine water at South Gujarat
Autorzy:: Desai, Nisheeth C.
Kukadiya, Nipul B.
Mehta1, Jignasu P.
Godhani, Dinesh R.
Lakhmapurkar, Jayendra
Dave, Bharti P.
Powiązania:: https://bibliotekanauki.pl/articles/1030123.pdf
Data publikacji:: 2020
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Estuary water
Nutrients
Physico-chemical parameters
Principal component analysis
Tidal variation
Opis:: In the present study, the four estuaries were selected from the South Gujarat region to appraise the impact of industrial pollution in the estuarine water samples. The study focused on the tidal variation of nutrients, which disclosed that concentrations of NO2–N, NO3–N, NH4–N, TN, and reactive silicates were higher in low-tide whereas pH, salinity, and dissolved oxygen were higher in high-tide water samples. The results of high BOD and low DO expose the anthropogenic inputs in these estuaries during the low-tide. The results of physico-chemical and nutrients parameters of water showed that the pollution level is strongly influenced by tidal and seasonal changes. Pearson’s correlation matrix and principal component analysis (PCA) are applied to a hydrological and hydrographical dataset for finding the spatial-temporal variation during the tidal difference. This study suggested that there is an impact of industrial pollution and anthropogenic inputs on the estuarine water of the study area.
Źródło:: World Scientific News; 2020, 143; 79-102
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Jakość wód cieku Bogdanka
Quality water in Bogdanka stream
Autorzy:: Janicka, E.
Kanclerz, J.
Borowiak, K.
Wiatrowska, K.
Lisiak, M.
Powiązania:: https://bibliotekanauki.pl/articles/400495.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ciek
zbiorniki
jakość wody
parametry fizykochemiczne
watercourse
reservoirs
water quality
physico-chemical parameters
Opis:: W pracy przedstawiono wyniki badań jakości wody cieku Bogdanka oraz zbiorników przez które przepływa, w okresach wegetacyjnych lat 2011–2012. Próbki do analiz laboratoryjnych pobierane były w siedmiu punktach pomiarowo-kontrolnych i obejmowały oznaczenie wybranych elementów fizykochemicznych tj. O₂, BZT₅, ChZT, pH, przewodność w 20° C, N-NO₃, N-NH4 i PO43-. Analiza otrzymanych wyników wykazała, że jakość wody w górnym biegu Bogdanki była lepsza niż w jej dolnym biegu – poniżej jeziora Rusałka oraz Stawu Sołackiego. Wielkość stężeń niektórych badanych wskaźników fizykochemicznych (ChZT, BZT₅ i PO_{4^3-) przekraczały wartości graniczne klasy II i dlatego stan cieku określono jako poniżej dobrego.}
The paper concerns with water quality of Bogdanka Stream and its reservoirs, which flow trough it, during vegetation period of 2011–2012. The water samples for physico-chemical analysis were collected from seven control points and analyzed for: O₂, BOD₅, COD, pH, EC, N-NO₃, N-NH₄ and PO_{4^3-. Results obtained showed that water quality in the upper-course of Bogdanka was better than in the lower-course – bellow Rusałka and Staw Sołacki Lakes. Some parameters such as: COD, BOD₅ and PO_{4^3- exceeded threshold values for second class and classified water as below good.}}
Źródło:: Inżynieria Ekologiczna; 2017, 18, 1; 202-208
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Assessment of soil properties of a lentic ecosystem in semiarid region: Nakki Lake, Mount Abu, India
Autorzy:: Gothwal, Rakesh
Jangir, O. P.
Powiązania:: https://bibliotekanauki.pl/articles/1031871.pdf
Data publikacji:: 2020
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Lentic ecosystem
Mount Abu
Nakki Lake
alkaline
physico-chemical parameters
phytoplanktons
semiarid region
zooplanktons
Opis:: Soil parameter balances the ecological symmetry in a lake-ecosystem. It determines the portability of water through its inter-relationship among phytoplanktons and zooplanktons. The purpose of the study is to identify the status of soil parameters in different seasons across the surrounding area of Nakki Lake, Mount Abu (2017-19). The soil parameters were analyzed and based on the results of the physico-chemical parameters of the soil; it confirms that the soil in the surrounding area of Nakki Lake in winter season can be classified as moderately alkaline soil. The soil analysis shows a linear positive correlation found with undeviating pattern (r = 1.000) of Clay with Bulk density and nitrogen; chloride with sulphur. Permeability is showing strong negative correlation with most of the soil parameters and shows linear trend in negative correlation (r = -1.000) with potassium.
Źródło:: World Scientific News; 2020, 149; 81-91
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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