Diagnosis of ecological quality of Dohou Lake on the basis of environmental parameters and phytoplankton community, Western Côte d’Ivoire

The ecological quality of Dohou Lake in Duékoué was determined from the phytoplankton community and physico-chemical parameters. All of the stations in Dohou Lake are dominated by Cyanobacteria and Bacillariophyta individuals, with high monthly proportions observed during the study period. Ecological indicators such as total phosphorus, transparency and chlorophyll made it possible to assess the physico-chemical quality of the environment. Thus, mean total phosphorus values ranged from 970 to 1150 µg/L from station D7 to station D6. Minimum transparency values ranged from 0.1 to 0.5 m from station D7 to D3, and mean values ranged from 0.3 m (station D7) to 0.69 m (station D1). For chlorophyll a, mean values ranged from 3.52 µg/L to 12.98 µg/L from station D7 to station D2, with maximum values for this parameter ranging from 13.4 µg/L (station D7) to 46.73 µg/L (station D2). All of the stations on Dohou lake are therefore in an eutrophic state. The monthly variations in the different proportions of phytoplankton groups observed indicate a clear predominance of Cyanobacteria followed by Bacillariophyta. The values of the Planktonic Index (PI) indicate that the stations are in average ecological condition, except for station D7, which is in poor ecological condition. These ecological qualities are reflected by the spatial and temporal dominance of 4 functional groups which are C, LM, K, and S1.

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Physico-chemical Parameters of Honey From Melipona mondury Smith, 1863 (Hymenoptera: Apidae: Meliponini)

Journal of Agricultural Science ◽

10.5539/jas.v10n7p196 ◽

2018 ◽

Vol 10 (7) ◽

pp. 196 ◽

Cited By ~ 1

Author(s):

Rogério Marcos de Oliveira Alves ◽

Jacqueline Lemos Viana ◽

Henrique de Abreu Cerqueira Sousa ◽

Ana Maria Waldschmidt

Keyword(s):

Electrical Conductivity ◽

Water Activity ◽

Reducing Sugars ◽

Chemical Properties ◽

Northeastern Brazil ◽

Chemical Parameters ◽

Technical Regulation ◽

Mean Values ◽

Physico Chemical

The physico-chemical properties of honey produced by the stingless bee Melipona mondury from Atlantic Forest in the state of Bahia, northeastern Brazil were evaluated. The evaluated characteristics included: water content, electrical conductivity, pH, acidity, water activity, ashes, diastase, hydroxymethylfurfural (HMF), reducing sugars and saccharose values. The honey samples showed mean values of 29.18% for moisture; 391.5 μS for electrical conductivity; pH of 4.06; 34.3 meq kg-1 for acidity; 0.73 for water activity; 0.18% for ashes; 4.05 (Goethe unit) for diastase; 1.60% for HMF; 65.42% for reducing sugars; and 2.14% of saccharose. Only the diastase activity was above the limits accepted by the Technical Regulation for Identity and Quality of Honey (Brazilian Ministry of Agriculture and Supplies). Most parameters are according to those reported in honeys from other species of stingless bees in Brazil.

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Hydrochemistry and Quality assessment of Groundwater from Constituency Water Projects, Pategi Local Government Area

LAUTECH Journal of Civil and Environmental Studies ◽

10.36108/laujoces/1202.60.0121 ◽

2021 ◽

Vol 6 (1) ◽

Author(s):

A. J. Gana

Keyword(s):

Heavy Metals ◽

Mineral Dissolution ◽

Total Hardness ◽

Biological Parameters ◽

Mean Values ◽

Physico Chemical ◽

Groundwater Samples ◽

Guideline Values ◽

Baseline Information

Water is vital for life sustenance hence adequate, safe and accessible supply must be made available to all. The remote village of Tankpaful located in the town of Pategi has recently witnessed the installation of new boreholes to harness groundwater as an improved source of drinking water. However, there is no known information about the quality of these sources. Hence, this paper aims to investigate the quality of groundwater samples from these boreholes in terms of their physico-chemical, heavy metals and biological parameters and also provide baseline information about the nature of the underground aquifer in this community. Groundwater samples (n=20) were obtained from randomly selected boreholes in the study area and examined for their physicochemical, heavy metal and biological parameters following standard procedures recommended by the American Public Health Association and compared to guideline values. Pearson’s correlation test was done to examine the relationship between measured parameters. With the exception of pH (5.58) and total hardness (296.99mg/L), all physico-chemical parameters were within guideline values specified by the WHO and SON. For heavy metals, mean values for Iron (0.32mg/L), Chromium (0.22mg/L) and Nickel (0.4mg/L) were found to exceed the given standard limits as well. The findings revealed that boreholes were mainly acidic which could be of natural origin such as mineral dissolution. Based on correlation analysis, the major mineral groups contributing to total hardness is the K-Cl group (1.00). We recommend that regular monitoring should be done to ensure guideline values are not breached while residents should be educated on the need to maintain these water sources to prevent deterioration.

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Identification of microbiological contamination and mutagenic potential of surface waters of the municipality of Dourados, MS

Ciência e Natura ◽

10.5902/2179460x29423 ◽

2018 ◽

Vol 40 ◽

pp. 38

Author(s):

Monyque Palagano da Rocha ◽

Jussara Oliveira Vaini ◽

Bruno Do Amaral Crispim ◽

Leonardo De Oliveira Seno ◽

Kelly Mari Pires de Olivera ◽

...

Keyword(s):

Surface Waters ◽

Most Probable Number ◽

Microbiological Analysis ◽

Microbiological Contamination ◽

Salmonella Spp ◽

Mutagenic Potential ◽

Probable Number ◽

Mean Values ◽

Physico Chemical

The aim of the study was to evaluate the water quality of the Água Boa stream and the lakes of the parks Arnulpho Fioravante and Antenor Martins (Dourados - MS), through physico-chemical parameters, microbiological analysis and mutagenicity test to monitor interference from Antropic activities and water depuration capacity. Initially the water samples were processed for coliform analysis using the Most Probable Number (MPN) technique. For the research of Salmonella spp., it was performed the pre-enrichment and enrichment of the water sample and streaking in Xylose Lysine Deoxicolate (XLD) agar. For the evaluation of the mutagenicity, smear peripheral blood of the specimens Astyanax lacustris were collected from the places studied. The Arnulpho Fioravante Park had higher mean values for Electrical Conductivity (353.5 uS cm-2), Total Dissolved Solids (179.3 mg L-1) and the highest values for total coliforms. Salmonella spp. it was identified in the water in both parks. The highest numbers of micronucleus were observed in Água Boa stream. Considering microbiological contamination and higher micronucleus number, it’s relevant to highlight the effects of anthropic interferences in local biota. Therefore, it’s of great importance to intensify the supervision of the municipal legislation, in order to conserve and preserve these ecosystems

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Genetic diversity among accessions of acerola based on the quality of fruits

Comunicata Scientiae ◽

10.14295/cs.v9i2.2961 ◽

2018 ◽

Vol 9 (2) ◽

pp. 133-141

Author(s):

Deniete Soares Magalhães ◽

José Carlos Moraes Rufini ◽

Alejandra Semiramis Alburquerque ◽

Renata Elisa Viol ◽

Miriã Cristina Pereira Fagundes ◽

...

Keyword(s):

Vitamin C ◽

Genetic Divergence ◽

Nearest Neighbor ◽

Principal Component ◽

Chemical Characteristics ◽

Mean Values ◽

Physico Chemical ◽

Improvement Programs ◽

Fruit Mass

Knowledge of the quality of fruits and the genetic variability among genotypes of acerola is important to optimize the use of genetic resources in improvement programs. The objective of the present study was to assess physico-chemical characteristics to determine genetic divergence among 24 genotypes of acerola. Sixty ripe fruits were collected per plant in a commercial orchard in the municipality of Jequitibá-MG. They were assessed in two production seasons with regard to their physical, chemical, and physico-chemical characteristics. Multivariate analysis of the genetic divergence among the genotypes was performed using principal component analysis, Tocher’s clustering method, and the nearest-neighbor hierarchical method, using the standardized mean Euclidean distance as the measure of dissimilarity. Genotypes 13, 20, and 23 exhibited means that were higher than the overall mean values for the main characteristics (fruit mass, ratio, and vitamin C content). Genotypes 3, 6, 8, 21, and 24 stood out with regard to fruit mass and ratio, i.e., they were larger and sweeter. Genotype 16 stood out with regard to fruit mass and vitamin C content. Results obtained using the methods were comparable, and the methods were effective in discriminating between the genotypes. This indicated variability, with potential for use in improvement programs. Based on the mean values for the chemical and physical characteristics of fruits and considering the genetic divergence among the genotypes, it was possible to suggested nine crosses to generate a future improved population, namely between genotype 11 and genotypes 3, 6, 8, 13, 16, 20, 21, 23, and 24.

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AVALIAÇÃO DA COMPOSIÇÃO FÍSICO-QUÍMICA E ROTULAGEM DE DIFERENTES MARCAS DE LEITE UHT INTEGRAL

Colloquium Agrariae ◽

10.5747/ca.2017.v13.nesp2.000208 ◽

2017 ◽

Vol 13 (Especial 2) ◽

pp. 51-59

Author(s):

Rodrigo Alves de Sousa ◽

Dayana Silva Batista Soares ◽

Ellen Godinho Pinto ◽

Brenda Ventura de Lima e Silva

Keyword(s):

High Temperature ◽

Titratable Acidity ◽

Important Food ◽

Dry Extract ◽

Mean Values ◽

Uht Milk ◽

Physico Chemical ◽

Whole Milk ◽

Ultra High Temperature

Milk is a very important food in human food, thanks to its nutritious content. UAT (Ultra High Temperature) or Ultra High Temperature (UHT) milk is the homogenised milk that has been submitted for 2 to 4 seconds at a temperature of 130 ° C to 150 ° C. Among the various components of milk are water , In greater quantity, fat, proteins and carbohydrates. The objective of this study was to evaluate UHT whole milk milks, commercial brands in the southern region of Goiás, as well as their physico-chemical characteristics and to compare the results with the current legislation standards and the information contained in the labels. To evaluate the physicochemical quality of the UHT milk, it was evaluated cryoscopic index, density, titratable acidity, pH, fat content and total dry extract (EST) and defatted (ESD). The results were compared with the quality standards established by the legislation. Sample labels were reviewed for legislation on general labeling, nutritional labeling, allergy and intolerance information. The samples analyzed 52 Colloquium Agrariae, vol. 13, n. Especial 2, Jan–Jun, 2017, p. 51-59. ISSN: 1809-8215. DOI: 10.5747/ca.2017.v13.nesp2.000208 presented acidity (ranging from 15.00 ± 0.12 to 15,60 ± 0,26 ºD), pH (from 6.66 ± 0.01 to 6.74 ± 0.02, cryoscope index (- 0.535 ± 0.003 at -0.538 ± 0.002), dry extract defatted (8.35 ± 0.14% at 8.83 ± 0.03%), density (1.029 ± 1.270 g / L at 1.032 ± 0.461) in accordance with B, C and D presented mean values of fat, 2.9 ± 0.06%, 2.9 ± 0.13%, and 2.80 ± 0.12%, respectively, below. Of the legislation and only the B mark had a lower EST value (11.25 ± 0.09%) than the legislation.

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The Role Water Content in the Forming of the Ecological Condition of the Rivers of Siverskyi Donets Basin

Journal of Geography Environment and Earth Science International ◽

10.9734/jgeesi/2020/v24i230205 ◽

2020 ◽

pp. 83-93

Author(s):

Natalia S. Loboda ◽

Oksana V. Smalii

Keyword(s):

Water Quality ◽

Water Content ◽

Agricultural Waste ◽

Petroleum Products ◽

Ecological Condition ◽

Donets Basin ◽

Global Warming Impact ◽

Physico Chemical ◽

The Impact

Aims: The aim of the study is to determine the impact of the water content in the forming of the ecological condition of the rivers of Siverskyi Donets Basin (Ukraine) based on chemical and physico-chemical observations. Study Design: The ecological condition of rivers is determined by their water contents and anthropogenic loading. Therefore, this study focused on the identification of the main trends in the changes of the quality of river water in the conditions of global warming impact. Place and Duration of Study: The study addressed the industrial Chuhuiv, Zmiiv, Lysychansk cities located along the main river, the Udy River (discharges of municipal and industrial wastewater of the Kharkiv City), Kazennyi Torets, Kryvyi Torets, Bakhmutka (discharges of mine water from Donetsk coal basin) and Luhan (industrial and agricultural waste water) for 26 years from 1990 to 2015. Methodology: Relationships between the indicators of water quality and the characteristics of water content were established from regression analysis. Determination of the ecological condition of the rivers was in the form estimated as a complex index of the ecological condition of their water, that based on the chemical and physico-chemical variations generated from many years of observations for them in the water. Results: The study findings show that the indices of mineralization block and sanitary-toxicological block are increasing as the water content decreases, and the indices of toxicological and fishery blocks are increasing. The relationship between the indices of the ecological-sanitary block and water content was not found to be statistically significant. The overall index of the ecological condition of the rivers water steadily increases as the water content increases. Conclusion: The water quality the rivers of the Siverskyi Donets Basin puts them into the categories of "polluted" and "very polluted" rivers. The analysis of the block indices of water quality generated in this study revealed that the substances of toxicological block (ammonium, nitrites, SSAS, heavy metals) and fishery block (petroleum products, phenols) are the most impacting on the water quality of the rivers of the Siverskyi Donets Catchment.

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DECOLOURIZATION AND COD REMOVAL OF WASEWATER FROM ETHANOL PRODUCTION PROCESS FROM MOLASSES BY COAGULANTION USING INORGANIC ALUM

Science and Technology Development Journal ◽

10.32508/stdj.v13i3.2146 ◽

2010 ◽

Vol 13 (3) ◽

pp. 92-102

Author(s):

Trung Duc Le

Keyword(s):

Ethanol Production ◽

Oxygen Demand ◽

Cod Removal ◽

Treated Wastewater ◽

Treatment Processes ◽

Physico Chemical ◽

Biological Methods ◽

Treatment Step ◽

Main Material

The industrial production of ethanol by fermentation using molasses as main material that generates large quantity of wastewater. This wastewater contains high levels of colour and chemical oxygen demand (COD), that may causes serious environmental pollution. Most available treatment processes in Vietnam rely on biological methods, which often fail to treat waste water up to discharge standard. As always, it was reported that quality of treated wastewater could not meet Vietnameses discharge standard. So, it is necessary to improve the treatment efficiency of whole technological process and therefore, supplemental physico-chemical treatment step before biodegradation stage should be the appropriate choice. This study was carried out to assess the effect of coagulation process on decolourization and COD removal in molasses-based ethanol production wastewater using inorganic coaglutant under laboratory conditions. The experimental results showed that the reductions of COD and colour with the utilization of Al2(SO4)3 at pH 9.5 were 83% and 70%, respectively. Mixture FeSO4 – Al2(SO4)3 at pH 8.5 reduced 82% of colour and 70% of COD. With the addition of Polyacrylamide (PAM), the reduction efficiencies of colour, COD and turbidity by FeSO4 – Al2(SO4)3 were 87%, 73.1% and 94.1% correspondingly. It was indicated that PAM significantly reduced the turbidity of wastewater, however it virtually did not increase the efficiencies of colour and COD reduction. Furthermore, the coagulation processes using PAM usually produces a mount of sludge which is hard to be deposited.

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Physico-Chemical Assessment of Groundwater Quality of Ahmednagar Industrial Area

Indian Journal Of Applied Research ◽

10.15373/2249555x/apr2014/70 ◽

2011 ◽

Vol 4 (4) ◽

pp. 228-230

Author(s):

Patil S.S Patil S.S ◽

◽

Gandhe H.D Gandhe H.D ◽

Ghorade I.B Ghorade I.B

Keyword(s):

Groundwater Quality ◽

Industrial Area ◽

Physico Chemical ◽

Chemical Assessment

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Physico-Chemical Analysis of Groundwater and Effect of Climatic Change in Angul-Talcher Area

International Journal of Emerging Research in Management and Technology ◽

10.23956/ijermt.v6i12.31 ◽

2018 ◽

Vol 6 (12) ◽

pp. 26

Author(s):

Aliva Bera ◽

D.P. Satapathy

Keyword(s):

Water Resources ◽

Linear Regression ◽

Regression Model ◽

Climatic Change ◽

Linear Regression Model ◽

Ann Model ◽

Quality Of Water ◽

Physico Chemical ◽

Simulation Based

In this paper, the linear regression model using ANN and the linear regression model using MS Excel were developed to estimate the physico-chemical concentrations in groundwater using pH, EC, TDS, TH, HCO3 as input parameters and Ca, Mg and K as output parameters. A comparison was made which indicated that ANN model had the better ability to estimate the physic-chemical concentrations in groundwater. An analytical survey along with simulation based tests for finding the climatic change and its effect on agriculture and water bodies in Angul-Talcher area is done. The various seasonal parameters such as pH, BOD, COD, TDS,TSS along with heavy elements like Pb, Cd, Zn, Cu, Fe, Mn concentration in water resources has been analyzed. For past 30 years rainfall data has been analyzed and water quality index values has been studied to find normal and abnormal quality of water resources and matlab based simulation has been done for performance analysis. All results has been analyzed and it is found that the condition is stable.

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