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Tytuł:
Study of physico-chemical parameters and phytoplankton diversity of Ousteri lake in Puducherry
Autorzy:
Dhanam, S.
Sathya, A.
Elayaraj, B.
Powiązania:
https://bibliotekanauki.pl/articles/1191240.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ousteri lake
Physico-chemical analysis
Phytoplankton
Opis:
The present study was carried out in the Ousteri lake (Puducherry State) from October 2013 to September 2014. The samples were collected during morning hours and were analysed monthly for physical, chemical and biological parameters. The various physico-chemical parameters like Water temperature, pH, Free CO2, Dissolved Oxygen, Turbidity, Electrical conductivity, Total dissolved solids, Total alkalinity, Chloride, Phosphate, Nitrate, Biological oxygen demand and Chemical oxygen demand were analyzed. Results have shown an increased concentration in physico-chemical parameters is more in summer compared to other seasons. The plankton studies were noticed that a total of 34 species belonging to 26 genus under the 4 classes. Among these, Cyanophyceae comprised of 15 species (belonging to 11 genera) followed by Chlorophyceae 9 species (belonging to 7 genera), Bacillariophyceae 7 species (belonging to 6 genera) and Euglenophyceae 3 species (belonging to 2 genera) were recorded. During the study it was found that Cyanophyceae algal growth is dominated over Chlorophyceae, Bacillariophyceae and Euglenophyceae.
Źródło:
World Scientific News; 2016, 54; 153-164
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phytoplankton Diversity and Abundance in Relation to Physico-chemical Parameters of Ifewara Reservoir, Southwestern Nigeria
Autorzy:
Hameed, I. O.
Adeniyi, I. F.
Adesakin, T. A.
Aduwo, A. I.
Powiązania:
https://bibliotekanauki.pl/articles/1076734.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Phytoplankton abundance
distribution
diversity
physico-chemical parameter
Opis:
The phytoplankton abundance and physico-chemical parameters of Ifewara Reservoir, Southwestern Nigeria was studied for four months (February to December, 2015). Four sampling stations (designated Stations 1-4) were established along the horizontal axis of the reservoir - from inflow region to the dam site end. At each station, net plankton samples were collected by sieving 30 litres of water through a plankton net of 50 µm mesh size into 30 ml concentrate volume. These were then preserved in 5% formalin solution and later treated with Lugol’s solution and reduced to 3 ml for microscope observation. The results of the physico-chemical parameters showed that some were above recommended limits of the National Environmental Standards and Regulations Enforcement Agencies (NESREA) for drinking water and aquatic life. Sixty-nine (69) species of phytoplankton were recorded from the four investigated sampling stations. The abundance of phytoplankton was in the following order; Bacillariophyceae (90.84%) > Chlorophyceae (44.67%) > Cyanophyceae (10.69%) > Charophyceae (0.31%) > Euglenophyceae (0.12%) > Dinophyceae (0.06%) > Chrysophyceae (0.03%). The most abundant phytoplankton species was Fragilaria aceania, accounting for 74.28% of the total, followed by Cosmarium quadrum (13.04%), Rhizoclonium hieroglyphicum (11.97%) and Oscillatoria tenuis (8.03%). With regard to the horizontal pattern of variation along the reservoir, the highest phytoplankton abundance was recorded at the inflow basin and the lowest abundance at the dam site. Almost all the phytoplankton groups also had their highest mean abundance during the rainy season rather then during the dry season.
Źródło:
World News of Natural Sciences; 2019, 24; 250-267
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of physico-chemical properties of gum-arabic of commerce from Acacia senegal found in different localities of Ethiopia
Autorzy:
Yebeyen, Dagnew
Haile, Fikremariam
Powiązania:
https://bibliotekanauki.pl/articles/1113922.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Acacia senegal
growing location
physico-chemical properties
Opis:
A study was conducted to investigate the effect of growing location in the physico-chemical properties of gum arabic obtained from Acacia senegal. Authentic representative gum exudates samples were collected from Abederafi, Yabello, Awash and Filtu areas of Ethiopia. The experiment was conducted to determine Moisture content (MC), Ash content (Ash), pH, Relative Viscosity (RV), Nitrogen (N), Crude Protein (CP) and Mineral contents. Laboratory analyses were employed to determine the physico-chemical characteristics. The results were analyzed by using SAS Statistical Software. The analysis indicated that very high significant differences (p < 0.001) were seen on Ash, pH, RV, iron, calcium, and sodium contents of the gum arabic samples between the study sites. Furthermore, significant differences (p < 0.05) were indicated for N, CP, Cu, K contents. The results also showed MC, Mn and Mg contents have no significant difference among growing locations. According to our results, the percentage moisture content of the gum arabic samples were between 12.64 % and 13.41 %, while Ash percentage were between 0.32 % and 16.98 %. The mean pH values of the gum samples, obtained by employing different concentration of aqueous solutions also ranged between 4.4 and 4.97. In addition, the relative viscosity of the gum samples studied fall between 0.9 to 4.2 centipose, while Nitrogen and crude protein contents of the gum arabic samples from the study areas were from 0.313 % to 0.513 % and 1.943 % to 3.21 %, respectively. The major mineral element compositions of the gum arabic samples in descending order were Mg, Ca, Na, Cu, Fe, Mn and K. As compared to international standards and prior studies on gum arabic, the gum-arabic samples from the study sites have comparable physico-chemical characteristics.
Źródło:
World News of Natural Sciences; 2017, 12; 33-42
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physico-chemical characteristic of the waters of Hornsund Fjord on south-west Spitsbergen (Svalbard Archipelago) in the summer season 1979
Autorzy:
Urbański, Jacek
Neugebauer, Ewa
Spacjer, Ryszard
Falkowska, Lucyna
Powiązania:
https://bibliotekanauki.pl/articles/2058206.pdf
Data publikacji:
1980
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Svalbard
physico-chemical characteristic of water
Źródło:
Polish Polar Research; 1980, 1, 4; 43-52
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Characterization of the reactivity of mineral additions by different microstructural and mechanical approaches
Autorzy:
Bouglada, M. S.
Naceri, A.
Baheddi, M.
Powiązania:
https://bibliotekanauki.pl/articles/89206.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
reactivity
pozzolanicity
mineral additions
physico-chemical properties
microstructure
Opis:
This paper presents an experimental study aimed at evaluating the reactivity of natural and industrial local mineral additions (pozzolan, slag and limestone) by different microstructural and mechanical approaches. Binary, ternary and quaternary cement compositions were prepared with partial replacement of the clinker by additions limited to 20%, according to CEM II / A cement specifications. The reactivity during the hydration process is characterized by the hydraulic power of the additions to react with the water and the hydrates of the cement and the pozzolanic capability of fixing the portlandite to form new mineral phases which contribute to the resistance as much as the hydrated products of cement. An experimental methodology was established for the reactivity illustration of the additions by a microstructural approach based on a study of the physicochemical and microstructural properties realized by X-ray diffraction (XRD), the scanning electron microscopy (SEM) on pastes. Further, thermogravimetric analysis (TGA), mercury microporosity (MIP) on mortars at 28 days of age was performed. A mechanical approach based on compressive strength at 2, 7 and 28 days to determine the activity index according to ASTM C 618 has been undertaken. The results obtained show a good correlation between the microporosity, X-ray diffraction and the resistance activity index, in particular for the slag, as for the thermogravimetric analysis that clearly confirms the pozzolanic activity of the pozzolan addition. As for mechanical performance, a binary mortar with 20% slag showed a better compressive strength at 28 days (49.40 MPa) with a reactivity index (87.90%) compared to the control mortar. Further, the slag developed better resistance (49.53 MPa) in combination with the other additions for quaternary mortars (pozzolan, limestone and slag) with an optimal rate of 5, 5 and 10%, respectively. Nevertheless, the pozzolan showed better compressive strength values compared to the slag for the binary mortars at young age 2 and 7 days of 25.67 and 32.07 MPa, respectively.
Źródło:
Mining Science; 2018, 25; 129-146
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physico-Chemical Properties of Sri Sanishwaran Temple Pond Water, Tirunallar
Autorzy:
Ganesh, K. Sankar
Xavier, R. Lawrence
Nagarajan, M.
Sundaramoorthy, P.
Powiązania:
https://bibliotekanauki.pl/articles/1193934.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Devotees
Physico-chemical properties
Saneshwaran temple
Water analysis
Opis:
Tirunallar Saniswaran Temple dedicated to Lord Darbaranyeswaran, a form of Lord Shiva. Temple management imposes restrictions over misuse of these holy ponds. The devotees use the holy water for washing their limbs before entering the temple. Sometimes they make a holy dip into the water; people believe that it can wash all their sins away. Thousands of devotees visit the temple. So, the present investigation deals with the physiochemical properties of Sri Saneeshwaran temple pond water. Analysis of water samples revealed that the physico chemical properties such as pH , Electrical conductivity, Total hardness (mg/l), Ca hardness (mg/l), Mg hardness (mg/l), BOD (mg/l), Total Dissolved solids (mg/l), Suspended solids (mg/l), Chlorides (mg/l), Sulphate (mg/l), Sodium (mg/l), Potassium (mg/l), Dissolved Oxygen (mg/l) and Oil & grease (mg/l)., is varied significantly. Similarly the bacterial load is higher in after mass bathing than in before mass bathing.
Źródło:
World Scientific News; 2015, 21; 1-11
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Characteristics of enzymatically degraded starch
Charakterystyka skrobi zdegradowanej enzymatycznie
Autorzy:
Babor, K.
Kalac, V.
Tihlarik, K.
Powiązania:
https://bibliotekanauki.pl/articles/1396402.pdf
Data publikacji:
1985
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
degraded starch
modified starch
physico-chemical characteristics of starch
Opis:
W produkcji żywności coraz bardziej wzrasta znaczenie otrzymywanej na skalę przemysłową skrobi częściowo zdegradowanej enzymatycznie. Do najważniejszych właściwości wskazujących na stopień hydrolizy skrobi należy przy produktach niskozdegradowanych - lepkość, a przy wysokozdegradowanych - właściwości redukcyjne. Dokonano dokładniejszej charakterystyki produkowanych w Czechosłowacji krochmali modyfikowanych oraz maltodekstryny produkcji NRD (preparat SHP) wykorzystując częściową ich rozpuszczalność w zimnej wodzie i częściowe wytrącanie metanolem. Otrzymane frakcje scharakteryzowano następującymi metodami: - zawartość amylozy oznaczano jodometrycznie metodą biamperometryczną, - względny ciężar cząsteczkowy określono metodami chemicznymi (utlenianie nadjodanem i następnie biamperometryczne oznaczanie nadmiaru jodu oraz metodą redukcyjną Somogyj Nelsona), jak również metodami fizycznymi (osmometryczną i sedymentacyjną przy użyciu ultrawirówki), - zawartość oligosacharydów oznaczono metodą chromatografii bibułowej. Charakterystykę poszczególnych frakcji badanych krochmali modyfikowanych przedstawiono w tab. 1. Natomiast w tab. 2 zestawiono obliczone wartości względnego ciężaru cząsteczkowego i stopnia polimeryzacji (DP) dla preparatu "Imuna". Na rys. 1 przedstawiono przebieg krzywych analizy biamperometrycznej poszczególnych frakcji preparatu "Slovškrob" w porównaniu ze skrobią ziemniaczaną i rozpuszczalną. Uzyskane wyniki świadczą, że można stosunkowo nieskomplikowanymi metodami analitycznymi otrzymać podstawowe dane o produkcie modyfikacji krochmalu. Metody te można również zastosować w praktyce przemysłowej dla technologicznej kontroli przebiegu procesu modyfikacji.
Źródło:
Acta Alimentaria Polonica; 1985, 11, 1; 85-87
0137-1495
Pojawia się w:
Acta Alimentaria Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Physico-Chemical Analysis of Soil during Summer Season in Lentic Fresh Water Ecosystem: Nakki Lake-Mount Abu (Rajasthan), India
Autorzy:
Gothwal, Rakesh
Gupta, Govind Kumar
Powiązania:
https://bibliotekanauki.pl/articles/1076524.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Alkaline
Deflocculating
Lake-Ecosystem
Lentic
Physico-chemical
Water ecosystem
Opis:
The objective of the research is to identify the status of physico-chemical parameters of the soil in the surrounding area of Nakki-Lake, Mount Abu, Rajasthan, India. Soil parameter plays a major role in determining the planktonic and plant biodiversity, which determines the portability of water and their inter-relationship among zooplanktons and other animals; balances the environmental equilibrium in a lake-ecosystem. The physico-chemical parameters were studied and the result confirms that the soil in the surrounding area of Nakki-Lake can be classified as moderately alkaline soil with (pH 7.11), Average Sand Content (75.12%), Silt Content (11.23%), Clay Content (6.25%), Organic Matter (3.36%), Permeability (27.66 mm/hr), Air Filled Porosity (14.33%) and other parameters showed low mean values including Nitrogen (0.23 mg/L), Phosphorus (52.33 mg/L), Potassium (732.67 mg/L), Magnesium (153.67 mg/L), Chloride (4108.33 mg/L), Sulphur (244.33 mg/L). The soil samples showed an average of Bulk Density (1453 kg/m3), Specific Gravity (2.62), Fusion Point (1245.67 °C), Total Combustible (0.22%), Exchangeable Sodium (0.91%), Calcium Carbonate (1.48%), Effective Temperature of Destruction (971.33 °C), Electrical Conductivity - CaSO4 Extract (2447 μS/cm) while average nitrate and sulphate levels were 31.19 mg/l and 123.73 mg/l respectively. Based on the result of the quality parameters of the soil analysis, the nature of the soil in Nakki Lake and the surrounding area is alkaline.
Źródło:
World Scientific News; 2019, 115; 117-127
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Extraction of Nigerian Beef Tallow by Wet Rendering Process and its Characterization
Autorzy:
Chizoo, Chizoo
Ume, Cyril Sunday
Esonye, Marcel Chimankpam
Okafor, Vincent Nwoye
Ofoefule, Akuzuo Uwaoma
Powiązania:
https://bibliotekanauki.pl/articles/1113574.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Beef Tallow
Gas Chrromatography
Physico-Chemical parameter
Slaughterhouse
wet rendering
Opis:
Nigeria has relied for several decades on the importation of tallow fat for her industries despite its inconsistency in availability and price in the market The above challenges and the recent soaring value of Dollars to Naira have made it highly necessary for Nigeria to consider the quantum of about 9 tonnes/day of tallow fat sent down the drain in each Nigerian slaughterhouse. Therefore, this research work has investigated the Physico-chemical quality of Nigerian beef tallow fat obtained by wet rendering of slaughterhouse waste from Obosi in Anambra State of Nigeria. It was analyzed using AOAC procedures (1990, 1993). The slaughter waste gave 15% yield of tallow fat with 199.5 mg/gkOH, 0.40%, 2.05% of saponification value, unsaponifable matter and Free Fatty Acid (FFA), respectively. The Gas Chromatography (GC) revealed the following fatty acids: 46.65% stearic acid, followed by 41.33% palmitic acid and 9.0% oleic acid. The results were found to be agreement with ISO and CODEX-STAN 211(1999) standards. To this end, the quality and usefulness of Nigerian beef tallow has been validated. Hence, investment in this area would help reposition Nigerian slaughterhouse waste matter control strategy, economy and industry.
Źródło:
World News of Natural Sciences; 2017, 15; 129-138
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
Wyświetlanie 1-15 z 61

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