Potentially toxic metal environmental pollution in sediments of a model hydroelectric plant water reservoir in Brazil

2021 ◽  
Vol 80 (16) ◽  
Author(s):  
João Batista Pereira Cabral ◽  
Susy Ferreira Oliveira ◽  
Francismário Ferreira dos Santos ◽  
Valter Antonio Becegato ◽  
Vitor Rodolfo Becegato ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Hydroelectric Plant ◽  
Water Reservoir ◽  
Toxic Metal ◽  
Plant Water

scholarly journals Isolasi dan Identifikasi Bakteri Resisten Arsen pada Sedimen di Pesisir Laut Buyat Tahun 2018

2018 ◽  
Vol 6 (2) ◽  
Author(s):  
Natalia M. Pantow ◽  
Billy J. Kepel ◽  
. Fatimawali
Keyword(s):  
Environmental Pollution ◽  
Coastal Area ◽  
Human Life ◽  
Mining Industry ◽  
Toxic Metal ◽  
Resistant Bacteria ◽  
North Sulawesi ◽  
Soil Sediment ◽  
High Level ◽  
Arsenic Resistant Bacteria

Abstract: Metals are very important and widely used in many aspects of human life, however, they can cause environmental pollution which is harmful to life. Arsenic is a very toxic metal that can cause kidney damage and is responsible to various chronic health problems, especially cancer. The coastal area of Buyat Sea in North Sulawesi Province has a high level of activity in mining industry. The mining waste results in environmental pollution due to arsenic release, thus triggers the occurence of arsenic-resistant bacteria. This study was aimed to determine whether there were arsenic-resistant bacteria in soil sediment originated from the coastal area of Buyat Sea and to identify the types of arsenic-resistant bacteria. This was a descriptive explorative study. Samples of soil sediment were obtained from one point on the coastal area of Buyat Sea. The results showed that there were 10 isolates of arsenic-resistant bacteria. There were five genera of bacteria that were resistant to arsenic, namely Escherichia, Klebsiella, Hafnia, Staphylococcus, and Bacillus. Conclusion: In the coastal area of Buyat Sea, five genera of arsenic-resistant bacteria were identified, as follows: Escherichia, Klebsiella, Hafnia, Staphylococcus, and Bacillus.Keywords: arsenic, sediment, arsenic-resistant bacteria Abstrak: Logam sangat penting dalam berbagai aspek kehidupan manusia walaupun dapat mencemari lingkungan dan berbahaya bagi kehidupan. Arsen merupakan logam berat yang sangat bersifat toksik dan dapat merusak ginjal serta bertanggung jawab terhadap berbagai gangguan kesehatan kronis, termasuk kanker. Daerah pesisir Buyat laut di Provinsi Sulawesi Utara memiliki tingkat aktivitas yang tinggi dalam bidang industri pertambangan. Limbah pertambangan mengakibatkan terjadinya pencemaran lingkungan oleh karena pelepasan arsen yang dapat memicu terjadinya bakteri resisten arsen. Penelitian ini bertujuan untuk mengetahui apakah terdapat bakteri resisten arsen pada sedimen yang berasal dari daerah pesisir laut Buyat dan untuk mengidentifikasi jenis bakteri resisten arsen yang ditemukan. Jenis penelitian ialah deskriptif eksploratif. Sampel penelitian ialah sedimen tanah di satu titik di pesisir laut Buyat. Hasil penelitian mendapatkan 9 isolat bakteri resisten arsen dan ditemukan lima genus bakteri yang resisten terhadap arsen yaitu Escherichia, Klebsiella, Hafnia, Staphylococcus, dan Bacillus. Simpulan: Di daerah pesisir laut Buyat ditemukan bakteri resisten arsen pada sedimen yaitu genus Escherichia, Klebsiella, Hafnia, Staphylococcus, dan Bacillus.Kata kunci: arsen, sedimen tanah, bakteri

scholarly journals Environmental Assessment and Toxic Metal-Contamination Level in Surface Sediment of a Water Reservoir in the Brazilian Cerrado

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1044
Author(s):  
João Batista Pereira Cabral ◽  
Pollyanna Faria Nogueira ◽  
Valter Antonio Becegato ◽  
Vitor Rodolfo Becegato ◽  
Alexandre Tadeu Paulino
Keyword(s):  
Sediment Quality ◽  
Water Reservoir ◽  
Toxic Metal ◽  
Hydroelectric Power Plant ◽  
Contamination Level ◽  
Hydroelectric Power ◽  
Potentially Toxic Metals ◽  
Water Reservoirs ◽  
Study Region ◽  
Sediment Samples

Polluted sediments limit the useful and biotic life of a water reservoir. Therefore, the classification and verification of the contamination and pollution levels of water reservoirs are essentials for the preservation of the biota and to organize the actions of environmental management. Thus, the aim of this study is to determine the concentrations of potentially toxic metals [lead (Pb), zinc (Zn), nickel (Ni), copper (Cu), and cadmium (Cd)] in sediment samples collected in the water reservoir of the Foz do Rio Claro Hydroelectric Power Plant (FRCHEPP) and estimate the contamination level by using the geoaccumulation index (Igeo). All results were compared with the values established by the CONAMA Resolution 454/2012. The Cu and Cd concentrations in the sediment samples were above Level II for most of the analyzed points in comparison with the data of the CONAMA resolution, being classified as poor quality sediments. Moreover, the Igeo values indicated potential pollution of the water reservoir sediment by Cu and Cd. Hence, the water reservoir was classified between moderately and extremely polluted. From this work it is possible to conclude that the frequent monitoring of the sediment quality in the FRCHEPP water reservoir is an indispensable action for periodic evaluation of the hydrographic basin quality in the study region, considering its importance as water supply and power generation for the state of Goiás, Brazil. Overall, the results of this work can be important to study other water reservoirs around the world.

The Reaction of Brain Structures with OsO4-Zinc-Iodide Stain

1971 ◽  
Vol 29 ◽  
pp. 272-273
Author(s):  
Werner J. Niklowitz
Keyword(s):  
Electron Microscope ◽  
Structural Changes ◽  
Mossy Fiber ◽  
Toxic Metal ◽  
Staining Technique ◽  
Brain Structures ◽  
Oxidase Inhibitor ◽  
Fiber Layer ◽  
Hippocampal Tissue ◽  
Zinc Iodide

After intoxication of rabbits with certain substances such as convulsant agents (3-acetylpyridine), centrally acting drugs (reserpine), or toxic metal compounds (tetraethyl lead) a significant observation by phase microscope is the loss of contrast of the hippocampal mossy fiber layer. It has been suggested that this alteration, as well as changes seen with the electron microscope in the hippocampal mossy fiber boutons, may be related to a loss of neurotransmitters. The purpose of these experiments was to apply the OsO4-zinc-iodide staining technique to the study of these structural changes since it has been suggested that OsO4-zinc-iodide stain reacts with neurotransmitters (acetylcholine, catecholamines).Domestic New Zealand rabbits (2.5 to 3 kg) were used. Hippocampal tissue was removed from normal and experimental animals treated with 3-acetylpyridine (antimetabolite of nicotinamide), reserpine (anti- hypertensive/tranquilizer), or iproniazid (antidepressant/monamine oxidase inhibitor). After fixation in glutaraldehyde hippocampal tissue was treated with OsO4-zinc-iodide stain and further processed for phase and electron microscope studies.

Identification of Pulmonary Deposits from a Sandpaper Worker: A Study by Electron Microscopy and X-Ray Microanalysis

1982 ◽  
Vol 40 ◽  
pp. 52-53
Author(s):  
S. K. Peng ◽  
M.A. Egy ◽  
J. K. Singh ◽  
M.B. Bishop
Keyword(s):  
Electron Microscopy ◽  
Environmental Pollution ◽  
Rare Case ◽  
Interstitial Fibrosis ◽  
X Ray ◽  
Documented Case ◽  
Etiologic Agents ◽  
Pulmonary Interstitial Fibrosis ◽  
Gold Miners ◽  
Pulmonary Changes

Electron microscopy and energy dispersive x-ray microanalysis (EDXA) are found to be very useful tools for identification of etiologic agents in pneumoconiosis or interstitial pulmonary disorders. Pulmonary interstitial fibrosis and granulomatosis are frequently associated with occupational and environmental pollution. Numerous reports of pneumoconiosis in various occupations such as coal and gold miners are presented in the literature. However, there is no known documented case of pulmonary changes in workers in the sandpaper industry. This study reports a rare case of pulmonary granulomatosis containing deposits from abrasives of sandpaper diagnosed by using EDXA.

Review of Environmental Pollution and Mental Health.

1974 ◽  
Vol 19 (7) ◽  
pp. 568-568
Author(s):  
GEORGE W. ALBEE
Keyword(s):  
Mental Health ◽  
Environmental Pollution

Equipment dentifying Vapor Leakages and Recovery of Petroleum Product Vapor When Stored

2020 ◽  
Vol 05 ◽  
pp. 60-64
Author(s):  
Y.N. Rybakov ◽  
◽  
V.E. Danilov ◽  
I.V. Danilov ◽  
◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Environmental Protection ◽  
Petroleum Product ◽  
Petroleum Products ◽  
Oil Products ◽  
Carnot Cycle ◽  
Oil Supply ◽  
Gas Stations ◽  
Environmental Situation ◽  
Vapor Absorption

The problem of losses of oil products from leaks during their storage and transportation at oil supply facilities is considered. The influence of oil product leaks on the environmental situation around oil depots and gas stations is shown. A detailed overview of existing methods and tools for detecting leaks of petroleum products from storage facilities is presented. The evaluation of their effectiveness. Two methods for detecting oil leaks and devices based on them are proposed. The first device monitors the movement of liquid in the tank, the second-detects petroleum products in wastewater. The problem of recovery of petroleum vapors and environmental pollution from the release of vapors of light fractions into the atmosphere is also considered. An overview of existing methods and means of recovery of petroleum vapors is presented. Two methods and devices for capturing oil vapors and returning them to the reservoir are proposed, based on different principles: vapor absorption in the cooled oil product and vapor recovery on the principle of the Carnot cycle. It is shown that these devices can provide effective detection of oil leaks and recovery of their vapors, as well as improve the effectiveness of environmental protection at modern gas stations and tank farms.

Rancang Bangun Sistem Monitoring Pengukuran Volume Air Berbasis IoT Menggunakan Arduino Wemos

2020 ◽  
Vol 6 (2) ◽  
pp. 147-153
Author(s):  
Muhamad Yusup ◽  
Po. Abas Sunarya ◽  
Krisandi Aprilyanto
Keyword(s):  
Waste Water ◽  
Waste Water Treatment ◽  
Water Reservoir ◽  
Ultrasonic Sensor ◽  
Automated System ◽  
Volume Formula ◽  
Air Volume ◽  
Database Server ◽  
A Company ◽  
Height Data

System The process of counting and storing in a manual water reservoir analysis has a high percentage of error rate compared to an automated system. In a company industry, especially in the WWT (Waste Water Treatment) section, it has several reservoir tanks as stock which are still counted manually. The ultrasonic sensor is placed at the top of the WWT tank in a hanging position. Basically, to measure the volume in a tank only variable height is always changing. So by utilizing the function of the ultrasonic sensor and also the tube volume formula, the stored AIR volume can be monitored in real time based on IoT using the Blynk application. From the sensor, height data is obtained which then the formula is processed by Arduino Wemos and then information is sent to the MySQL database server via the WIFI network.

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