scholarly journals Hydrochemical Approach to Groundwater in the Environment of the Public Discharge of Lake Mbeubeuss (Dakar, Senegal)

2022 ◽  
Vol 8 (1) ◽  
pp. 458-465
Author(s):  
Olivier Florent Essouli ◽  
Edmond NICAISE Malanda Nimy ◽  
Timothée Miyouna ◽  
Sophie Aïssatou Gladima-Siby ◽  
Laurent Matini ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Chemical Elements ◽  
Chloride Ion ◽  
Anthropogenic Pollution ◽  
Household Waste ◽  
Sea Spray ◽  
Lake Area ◽  
The Public ◽  
Ground Waters ◽  
True Value

To determine the origin and the processes of groundwater mineralization in the Mbeubeuss lake area, the major ion concentrations of the groundwater were compared to those of the rainwaters which constitute the input function of the aquifer of the Quaternary sands in the area of lake Mbeubeuss. The physico-chemistry of groundwater near the public discharge and its surroundings, has shown that the true value of the electrical conductivity of waters are around 2000 µS/cm. Values of electrical conductivity greater than 2000 µS/cm would represent the particular mineralization of ground waters by the public discharge of lake Mbeubeuss. The chemical facies of ground waters are dominated by the sodium and potassium chloride and calcium chloride facies. The study of the relationship between the major chemical elements and the chloride ion and the representation in the modified Chadha diagram of the chemical analyzes of ground waters from the campaigns of July 1998, July 2002 and March 2003, made it possible to highlight the different sources and processes controlling the mineralization of ground waters in the Mbeubeuss Lake area. Despite the proximity to the sea which suggests a considerable contribution of salts by aerosols and sea spray, the mineralization of ground waters in the area of lake Mbeubeuss is largely due to leachate from household waste and the influence of old sediments of the dry lake Mbeubeuss. The main processes controlling the mineralization of ground waters are marine contributions (aerosols and sea spray), dissolution-precipitation of minerals from the aquifer matrix, atmospheric CO2 diffusion, base exchanges, dilution-concentration and anthropogenic pollution.

scholarly journals Mecanismes De Contamination Des Eaux Souterraines Dans Le Secteur Du Lac Mbeubeuss, Dakar, Senegal

2018 ◽  
Vol 14 (27) ◽  
pp. 254
Author(s):  
Essouli Olivier Florent ◽  
Gladima-Siby Sophie Aïssatou ◽  
Miyouna Timothée ◽  
Matini Laurent ◽  
Faye Serigne
Keyword(s):  
Electrical Conductivity ◽  
Chemical Elements ◽  
Anthropogenic Pollution ◽  
True Value ◽  
Dry Lake ◽  
Major Chemical ◽  
Eaux Souterraines ◽  
The Relationship ◽  
Geological Formations ◽  
Lake Site

The physicochemistry of groundwater in the immediate environment of the dump, and its surroundings, shows that the true value of the electrical conductivity of groundwater is close to 2000 μS / cm. The value of electrical conductivity that is greater than 2000 μS / cm demonstrates groundwater contamination through the Mbeubeuss Lake landfill, with chemical groundwater facies dominated by Sodium Chloride, Potassium Chloride, and Calcium Chloride. The study of the unsaturated zone of the aquifer and the relationship between the major chemical elements of groundwater, rainwater, and seawater made it possible to specify, on one hand, the sources of mineralization of the groundwater at the Mbeubeuss Lake site and its surroundings. Indeed, the situation close to the sea would suggest a considerable intake of salts by aerosols and sea spray. Based on contribution to this study, the influence of the old sediments of the dry Lake Mbeubeuss and the percolation of leachates resulting from the decomposition of garbage landfilled under the action of rainwater would be added. On the other hand, this study also made it possible to determine the main processes of controlling the mineralization of groundwater. This includes the marine inputs, the dissolution-precipitation of clay minerals present in the geological formations constituting the aquifer, the dilution- concentration, evaporation, and anthropogenic pollution.

Population Growth and Waste Management in Metropolitan Lagos

2013 ◽  
Vol 11 (2) ◽  
Author(s):  
Femi O. Omololu ◽  
Akinmayowa S. Lawal
Keyword(s):  
Waste Management ◽  
Population Growth ◽  
Management Practices ◽  
Public Private Partnership ◽  
Household Waste ◽  
Waste Generation ◽  
Private Partnership ◽  
The Public ◽  
Lagos State ◽  
Waste Management Practices

This paper examines the influence of population growth on waste generation in Lagos metropolis, African’s most populous urban conglomeration. Using both quantitative and qualitative methods, the study analyses the pattern of household waste disposal, collection and transportation in Lagos State. It also examines the public-private partnership strategy adopted in waste management. The findings show that population growth significantly influences waste generation and management in Lagos metropolis. As the population increased, the volume of waste generated also increased in each LGA of Lagos State. The public-private partnership strategy has been effective in managing waste, but the Lagos State Waste Management Authority oversight was adjudged as less than satisfactory. The paper concludes that intervention is needed in terms of educating the growing population of the Lagos metropolis on the best waste management practices. It highlights the need for a more efficient and effective publicprivate partnership collaboration to solve this perennial social problem.

Sosialisasi Daur Ulang Sampah Sebagai Upaya Pengembangan Eko-Budaya di Lingkungan Desa Sayang Jatinangor Kabupaten Sumedang

2017 ◽  
Vol 1 (2) ◽  
pp. 29
Author(s):  
Sri Rijati ◽  
Tania Intan ◽  
Mega Subekti
Keyword(s):  
Economic Value ◽  
Geographical Location ◽  
New Product ◽  
Household Waste ◽  
Public Concern ◽  
Priority Area ◽  
The Public ◽  
Negative Behaviour

This activity aims to growth awareness and public concern over the use of household waste. One effective way is tomake the process of recycling of waste in order to be a new product that has economic value. Sayang village, Jatinangor inSumedang district became one of priority area for the organization of this event. Its geographical location which is relativelyclose to the area of education is one reason for choosing this village. The activities in the form of Program Pengabdian kepadaMasyarakat Dosen (PPMD) is carried out by means of lectures, demonstrations and practices / trainings. The high productionof household waste and negative behaviour regarding garbage is actually an issue that is closely related to cultural behaviour.Therefore, the solution is actually should be also related with the issue of people’s mindset about the garbage. Recycling wastebins in order to produce a product that has economic value to be an alternative way to change people's mindsets about thegarbage that have tended to be negative. This activity is considered successful because of the participation of the public,especially mothers of households is quite high and active in a series of events

scholarly journals Broadband dielectric spectroscopy for monitoring temperature-dependent chloride ion motion in BiOCl plates

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Adrian Radoń ◽  
Dariusz Łukowiec ◽  
Patryk Włodarczyk
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Spectroscopy ◽  
Low Frequency ◽  
Chloride Ion ◽  
Ion Source ◽  
Chloride Ions ◽  
Ion Concentration ◽  
Broadband Dielectric Spectroscopy ◽  
Free Chloride ◽  
Structure Rebuilding

AbstractThe dielectric properties and electrical conduction mechanism of bismuth oxychloride (BiOCl) plates synthesized using chloramine-T as the chloride ion source were investigated. Thermally-activated structure rebuilding was monitored using broadband dielectric spectroscopy, which showed that the onset temperature of this process was 283 K. This rebuilding was related to the introduction of free chloride ions into [Bi2O2]2+ layers and their growth, which increased the intensity of the (101) diffraction peak. The electrical conductivity and dielectric permittivity were related to the movement of chloride ions between plates (in the low-frequency region), the interplanar motion of Cl− ions at higher frequencies, vibrations of these ions, and charge carrier hopping at frequencies above 10 kHz. The influence of the free chloride ion concentration on the electrical conductivity was also described. Structure rebuilding was associated with a lower concentration of free chloride ions, which significantly decreased the conductivity. According to the analysis, the BiOCl plate conductivity was related to the movement of Cl− ions, not electrons.

Ryanair: success before love

2015 ◽  
Vol 31 (8) ◽  
pp. 1-3 ◽  
Author(s):  
Mark Thomas
Keyword(s):  
Airline Industry ◽  
Business Models ◽  
Low Cost ◽  
Public Image ◽  
Necessary Condition ◽  
Sustainable Competitive Advantage ◽  
Value Proposition ◽  
Content Type ◽  
The Public ◽  
True Value

Purpose – This paper aims to show why public acclaim is not always a guarantee for healthy profits. A low-cost forerunner, Laker Airlines, also discovered this same fact to its fatal cost. A company needs to understand its true value proposition and ensure that customers are willing to pay for it. Ryanair was adored by the public when it began its low-cost flights from Dublin to London in 1986. That love nearly drove it to bankruptcy. Today, despite its poor image, it is one of the most successful and profitable companies in the industry. Design/methodology/approach – The article analysis of the changing fortunes of Ryanair from its launch to its near bankruptcy in 1991 and then its revival of fortunes. It draws a parallel with Laker Airlines and the low-cost transatlantic Skytrain. Adulated by the public, the company folded in 1982. It is supplemented with research the airline industry and low-cost business models. Findings – The article shows why companies should not fall into the trap of believing that a good public image will be the necessary condition for maintaining a sustainable competitive advantage. They need to fully understand the value proposition and what a customer is willing to buy.

scholarly journals MENINGKATKAN KEMAMPUAN KONEKSI MATEMATIS MELALUI PEMBELAJARAN METAKOGNITIF (PENELITIAN TINDAKAN KELAS DI SEMESTER IV JURUSAN MATEMATIKA MATAKULIAH KALKULUS LANJUTAN LANJUTAN) TAHUN PELAJARAN 2014/2015. INCREASING CAPACITY THROUGH LEARNING CONNECTIONS MATHEMATICAL METACOGNITIVE (CLASS ACTION RESEARCH IN SEMESTER IV DEPARTMENT OF MATHEMATICS CALCULUS COURSE CONTINUED CONTINUED) YEARS OF STUDY 2014/2015.

2016 ◽  
Vol 2 (1) ◽  
Author(s):  
Irmayanti Irmayanti
Keyword(s):  
Waste Management ◽  
Public Awareness ◽  
Field Research ◽  
Class Action ◽  
Shared Responsibility ◽  
Front Page ◽  
Household Waste ◽  
The Public ◽  
Housing Complex ◽  
The Government

Tujuan dari penelitian ini untuk mengetahui peningkatan kemampuan koneksi matematika mahasiswa/i melalui pembelajaran metakognitif di Semester IV Jurusan Matematika Tahun Pelajaran 2014/2015. Penelitian ini merupakan Penelitian Tindakan Kelas (PTK). Subjek penelitian ini adalah mahasiswa/i semester IV matematika. Objek dalam penelitian ini adalah pembelajaran matematika dalam usaha peningkatan kemampuan koneksi matematika mahasiswa/i melalui pembelajaran metakognitif. Teknik pengumpulan data dengan cara: Observasi, tes, dan dokumen. Instrumen penelitian ini menggunakan: RPS, LKS, Tes dan Lembar Observasi. Penelitian tindakan kelas ini dilaksanakan dalam 2 siklus, yang masing-masing siklus terdiri dari tahap perencanaan, pelaksanaan, pengamatan dan refleksi. Hasil penelitian menunjukkan bahwa untuk untuk siklus I untuk indikator 1, indikator 2, dan indikator 3 berdasarkan kategori Sangat Kurang (SK), Kurang (K), Cukup (C),  Baik (B) dan Sangat Baik (SB) berturut-turut ada sebesar 63,88%, 77,76%, 80,55%, 63,88%, dan 5,54%. Setelah dilakukan pemberian tindakan dengan model pembelajaran Metakognitif, banyak mahasiswa/i yang berhasil meningkatkan kemampuan koneksi matematika pada akhir siklus II, untuk indikator 1, 2 dan 3 kategori Sangat Kurang (SK), Kurang (K), Cukup (C),  Baik (B) dan Sangat Baik (SB) berturut-turut ada sebesar 13,88%, 44.43%, 33,32%, 116,65%, dan 91,65%. Dari penelitian ini dapat diperoleh simpulan bahwa melalui pembelajaran Metakognitif dapat meningkatkan kemampuan koneksi mahasiswa/i semester IV matematika Universitas Labuhanbatu. Kata Kunci: Kemampuan Koneksi Matematika, Pembelajaran Metakognitif. This study was conducted to determine the effect of household waste to the environment in terms of aspects of biology at the housing complex kel housekeeping earth. nevertheless compass excl. southern shoreline. This research is a field (Field Research) is a research .Populasi residents handle garbage Complex Graha Pertiwidalam citizens. Samples were done by using stratified random sampling.Untuk collect the necessary data in this study, the data collection tools used, ie observation, interviews, and Library Research.Teknik data collectors that researchers use is to conduct interviews with entrepreneurs as a developer Complex Graha Pertiwi the data collected from the field study will be presented systematically. The results of the research, that rubbish in Housing Complex Graha Pertiwi derived from household waste from residents who live in the complex. The type of waste that is often seen is composed of organic waste and garbage in the complex non organik.Setiap day Graha Pertiwi inmates on average to dispose of waste ranging from 1 kg / perharinya.Kesadaran high community waste management is big enough where their garbage stacked on the front page house and burned, so that the waste could not accumulate too lama.Kendala faced and penanggulangannyamasih efforts in creating public awareness of cleanliness lingkungan.Hal is seen from a habit of throwing garbage on tempatnya.Persepsi community about waste management is still concentrated in the government, whereas hygiene problem is a shared responsibility between the public and the government, the limited space for the collection and final disposal, as well as limited transportation funds rubbish. While a pile of garbage is increasing day by day. Keywords: Household Waste, Graha Pertiwi

scholarly journals The external environment of birds as a factor of immunobiochemical conditions

2020 ◽  
Vol 9 (3) ◽  
pp. 152-157
Author(s):  
Rinat R. Fatkullin ◽  
Aikumis K. Saken
Keyword(s):  
Metabolic Disorders ◽  
Clinical Manifestations ◽  
The Body ◽  
Household Waste ◽  
Trophic Chain ◽  
Behavioral Strategies ◽  
The Public ◽  
Initial Stage ◽  
Highly Sensitive

Abnormal environmental factors contribute to advanced behavioral strategies in higher regulatory centers as well as to the assessment of possible morphofunctional and energy transformations in the body. Animals, especially birds, which are characterized by curiosity, are highly sensitive to the presence of environmental pollution, since they interact with elements of the environment and surroundings. Contamination of broiler products can also be caused by contaminated soil and dust, unknown sources of persistent heavy metals and organic pollutants that are unknown to the public, such as car wreckage, household waste, and so on. In general, adverse factors that regularly affect small details do not require significant changes in the body at the initial stage, mainly affect non-specific mechanisms that lead to long-term activation. The paper contains significant work based on the analysis of microbiogenic links in the trophic chain, but the formation of processes associated with metabolic disorders from the development of trace elements to clinical manifestations is still insufficiently studied, so it is difficult to diagnose and treat previously unknown animal diseases in veterinary practice.

Atmospheric dispersed sedimentary matter over the Barents sea

2021 ◽  
pp. 127-142
Author(s):  
V.P. Shevchenko ◽  
◽  
L.P. Golobokova ◽  
S.M. Sakerin ◽  
A.P. Lisitzin ◽  
...  
Keyword(s):  
Continental Crust ◽  
Barents Sea ◽  
Chemical Elements ◽  
Ionic Composition ◽  
Anthropogenic Pollution ◽  
Insoluble Fraction ◽  
The Arctic ◽  
Noticeable Effect ◽  
The Barents Sea ◽  
Upper Continental Crust

The concentration and composition of aerosols in the atmosphere over the Barents Sea were studied. Earlier, the contribution of aerosols to the formation of the Arctic environment was underestimated. Our data indicated a noticeable effect of continental aerosol on the atmosphere of the Barents Sea. The relationship of the black carbon concentration and the type of air masses has been established. Its concentration increases hundreds of times in the atmosphere of the sea when continental air is removed. The ionic composition and the content of chemical elements in the insoluble fraction of aerosols of the air over the Barents Sea were studied. The content of most chemical elements (Na, Al, K, Ca, Sc, Fe, Co, Rb, Zr, Cs, Ba, REE, Hf, Ta, Th, U) in the insoluble fraction of aerosols was below the average values for the upper continental crust. The content of Cr, Cu, Zn, As, Se, Br, Ag, Sb, Au, Pb is significantly higher than their average for the upper continental crust, due to the influence of the anthroposphere. Probable sources of anthropogenic pollution of aerosols in the Arctic are discussed.

scholarly journals Glaciochemical reconnaissance of a new ice core from Severnaya Zemlya, Eurasian Arctic

2005 ◽  
Vol 51 (172) ◽  
pp. 64-74 ◽  
Author(s):  
Karin Weiler ◽  
Hubertus Fischer ◽  
Diedrich Fritzsche ◽  
Urs Ruth ◽  
Frank Wilhelms ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Ice Core ◽  
Arctic Basin ◽  
Anthropogenic Pollution ◽  
The Arctic ◽  
Ice Cap ◽  
Siberian Arctic ◽  
Nitrate Concentrations ◽  
Severnaya Zemlya ◽  
Combustion Processes

AbstractA deep ice core has been drilled on Akademii Nauk ice cap, Severnaya Zemlya, Eurasian Arctic. High-resolution chemical analysis has been carried out for the upper 53 m of this ice core to study its potential as an atmospheric aerosol archive, despite strong meltwater percolation. These records show that a seasonal atmospheric signal cannot be deduced. However, strong year-to-year variations have allowed the core to be dated, and a mean annual net mass balance of 0.46 m w.e. a-1 was deduced. The chemical signature of an extraordinarily high peak in electrical conductivity at 26 m depth pointed clearly to the eruption of Bezymianny, Kamchatka, in 1956. However, in general, peaks in the electrical conductivity are not necessarily related to deposition of volcanogenic sulphur aerosol. In contrast, maximum sulphate and nitrate concentrations in the ice could be related to maximum SO2 and NOx anthropogenic emissions in the 1970s, probably caused by the nickel- and copper-producing industries in Norilsk and on the Kola peninsula or by industrial combustion processes occurring in the Siberian Arctic. In addition, during recent decades sulphate and nitrate concentrations declined by 80% and 60%, respectively, reflecting a decrease in anthropogenic pollution of the Arctic basin.

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