Evaluation of health risks from a buried mass of diesel fuel before and after bioremediation

1994 ◽  
Vol 3 (1) ◽  
pp. 1-27
Author(s):  
David H. Rosenblatt ◽  
John F. Manning ◽  
Carlo D. Montemagno
Keyword(s):  
Health Risks ◽  
Diesel Fuel ◽  
Before And After

Impact of moisture on the corrosion behavior of copper and mild carbon steel in corn biodiesel

2018 ◽  
Vol 36 (6) ◽  
pp. 559-574 ◽  
Author(s):  
Diana-Luciana Cursaru ◽  
Salim Nassreddine ◽  
Bassam Riachi ◽  
Mihaela Neagu ◽  
Sonia Mihai ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Diesel Fuel ◽  
Acid Number ◽  
X Ray Diffraction ◽  
Total Acid ◽  
Experimental Conditions ◽  
Mild Carbon Steel ◽  
Before And After ◽  
Hygroscopic Nature ◽  
Static Immersion

AbstractPresence of moisture is very important for vegetable oils and for corresponding biodiesel because it may cause some problems or accelerate some issues that cannot be ignored. One of the main hindrances of biodiesel is its hygroscopic nature, which accelerates the corrosion of the fuel system of the engines. Thus, this study aims to investigate the effects of moisture on corn biodiesel and its susceptibility to corrosion on different automotive materials such as copper and mild carbon steel. Static immersion tests in corn biodiesel (B100) with different water concentrations (100 ppm, 500 ppm, and 700 ppm) were carried out at 90°C for 1200 h, and the results were compared to that of commercial diesel fuel (B0). After immersion tests, the surface morphology was studied by scanning electron microscopy (SEM), and corrosion products were detected by X-ray diffraction (XRD). The total acid number (TAN) was used to evaluate the changes in acidity of fuel, before and after immersion tests. It was found that under experimental conditions, corn biodiesel is more corrosive than diesel fuel, and the moisture from corn biodiesel has a strong influence on corrosion rate on metals. Copper is more susceptible to corrosion in corn biodiesel than mild carbon steel.

scholarly journals PENGARUH MODIFIKASI BURITAN SPEED BOAT TERUBUK EXPRESS 6 TERHADAP KECEPATAN KAPAL

2018 ◽  
Vol 8 (2) ◽  
pp. 297 ◽  
Author(s):  
Edy Haryanto
Keyword(s):  
Diesel Fuel ◽  
Input Data ◽  
Field Survey ◽  
B Value ◽  
Maximum Speed ◽  
Total Resistance ◽  
Sea Transportation ◽  
Before And After ◽  
Shape Changes ◽  
Boat Speed

Speedboat Terubuk Express is a fast ship that is used as a means of sea transportation to carry passengers with a capacity of 60 people. Because it continues to experience losses, currently the Terubuk Express speedboat is modified by adding capacity and replacing the main drive engine which previously used an outboard engine with 4 x 200 horse power replaced with an internal engine that uses diesel fuel with power 1140 kilowatt. This study aims to determine the effect of stern shape changes and interaction total resistance before and after being modified on the hull to the speed of the ship.In this study several stages were carried out, namely a field survey to obtain the effect of size addition, making a model using Maxsurf 13.0 software, input data and running simulations using Hullspeed 13.01 then analyzing the results which included obstacles and speed.Based on the results of the analysis and calculations showed that the change in stern shape on the express speed boat speed caused L / B to increase by 1.2%, an increase in the comparison of the L / B value could affect the ability of the boat's motion and stability. The total resistance of the ship increased by 1.05% which at a speed of 35 knots before the change in total resistance was 33.5 kN while after the change in the total resistance became 35, 1 kN. Changes to the installed power engine can give a maximum speed of 49 knots with a total barrier of 47.5 kN. Increased speed greatly affects the engine seat and the strength of construction and the location of the longitudinal of bouyancy.

scholarly journals Brain volumetric changes in the general population following the COVID-19 outbreak and lockdown

2020 ◽  
Author(s):  
Tom Salomon ◽  
Adi Cohen ◽  
Daniel Barazany ◽  
Gal Ben-Zvi ◽  
Rotem Botvinik-Nezer ◽  
...  
Keyword(s):  
Health Risks ◽  
Natural Experiment ◽  
Brain Plasticity ◽  
Well Being ◽  
Brain Regions ◽  
Healthy Population ◽  
Induced Stress ◽  
Before And After ◽  
The Brain ◽  
Rare Opportunity

AbstractThe COVID-19 outbreak introduced unprecedented health-risks, as well as pressure on the financial, social, and psychological well-being due to the response to the outbreak. Here, we examined the manifestations of the COVID-19 outbreak on the brain structure in the healthy population, following the initial phase of the pandemic in Israel. We pre-registered our hypothesis that the intense experience of the outbreak potentially induced stress-related brain modifications. Volumetric changes in n = 50 participants who were scanned before and after the COVID-19 outbreak and lockdown, were compared with n = 50 control participants who were scanned twice prior to the pandemic. The pandemic provided a rare opportunity to examine brain plasticity in a natural experiment. We found volumetric increases in bilateral amygdalae, putamen, and the anterior temporal cortices. Changes in the amygdalae diminished as time elapsed from lockdown relief, suggesting that the intense experience associated with the pandemic outbreak induced transient volumetric changes in brain regions commonly associated with stress and anxiety.

Preparation of Deep Hydrodesulfurzation Catalysts for Diesel Fuel using Organic Matrix Decomposition Method

2016 ◽  
pp. 216-253
Author(s):  
Hamid Audah AlMegren ◽  
Sergio Gonzalez-Cortes ◽  
Yu Huang ◽  
Haoyi Chen ◽  
Yangdong Qian ◽  
...  
Keyword(s):  
Citric Acid ◽  
Diesel Fuel ◽  
Decomposition Method ◽  
Performance Test ◽  
Chelating Agent ◽  
Matrix Decomposition ◽  
Organic Matrix ◽  
Hydrogen Consumption ◽  
Dispersing Agent ◽  
Before And After

In this work, a series of supported CoMo or NiMo HDS catalysts have been prepared based on the organic-metal matrix decomposition method and tested for diesel deep HDS with minimum hydrogen consumption under relatively low hydrogen partial pressure conditions. The aim is to develop a HDS catalyst which can reduce sulphur in diesel fuel from 5000ppm down to 50 ppm in a single pass with minimum hydrogen consumption under the conditions of 340oC, 35 bar, LHSV 1.2 h-1 with low H2/oil ratio. The catalysts preparation process was monitored and the resultant catalyst samples before and after the HDS performance test have been characterised, some interesting results have been obtained. The presence of citric acid as organic additive/dispersing agent/chelating agent in the impregnation solution improved HDS activity compared to the equivalent CoMo catalyst prepared without citric acid, The order of activity of the cobalt precursors is Co citrate > Co acetate > Co nitrate.

scholarly journals Impoverishment assessment of slum dwellers after off-site and on-site resettlement: a case of Indore

2014 ◽  
pp. 104-127 ◽  
Author(s):  
Sejal Patel ◽  
Ritika Mandhyan
Keyword(s):  
Local Government ◽  
Health Risks ◽  
Impact Analysis ◽  
Significant Loss ◽  
Negative Consequences ◽  
Slum Dwellers ◽  
Before And After ◽  
Household Assets ◽  
The Impact

This paper is an attempt to assess the impacts of off-site and on-site resettlement projects in Indore by comparing slum dwellers lives before and after the implementation of the projects, complimenting and corroborating a sister paper based on fieldwork in Ahmedabad (Patel, Sliuzas, Mathur, & Miscione, fortcoming). The impact analysis is based on the indicators of impoverishment risks due to displacement and resettlement formulated by Cernea (2000a) in his Impoverishment Risks and Reconstruction (IRR) model. The findings indicates the presence of the following forms of impoverishment which Cernea proposed for the displacees: significant loss in household assets, increased joblessness or unemployment, loss of access to common services, increased health risks, marginalisation and social disarticulation, all of which have compounded their vulnerability and chances of falling deeper into poverty. The paper also argues that compared to off-site and on-site resettlement displacees were less affected by negative consequences and impoverishment risks. The paper concludes with recommendations for slum resettlement policies of local government so that impoverishment risks can be reasonably averted.

Analysis of the Deterioration of Nylon-66 Immersed in GTL Diesel Fuel Part 2. Analysis of Model Fuel and Nylon Before and After Immersion

2006 ◽  
Author(s):  
Tadao Ogawa ◽  
Ayako Ohshima ◽  
Kyoko Nakai ◽  
Kazuo Okamoto ◽  
Atsushi Murase ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Nylon 66 ◽  
Model Fuel ◽  
Before And After

scholarly journals Bioactive Amines Screening in Four Genotypes of Thermally Processed Cauliflower

Antioxidants ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 311 ◽  
Author(s):  
Diamante ◽  
Borges ◽  
Silva ◽  
Minatel ◽  
Corrêa ◽  
...  
Keyword(s):  
Amino Acids ◽  
Biogenic Amines ◽  
Health Risks ◽  
Thermal Processing ◽  
Quality Index ◽  
Food Poisoning ◽  
Human Consumption ◽  
Good Source ◽  
Thermally Processed ◽  
Before And After

Biogenic amines are important indicators of food quality with recognized antioxidant capacity. Diets that are rich in these compounds promote several benefits for human health, although the consumption in excess may result in food poisoning. This study aims to screen the levels of biogenic amines in four colored cauliflowers, before and after cooking (boiling, steaming, and microwaving). In addition, the levels of tryptophan and 5-hydroxytryptophan, two serotonin precursors, were analyzed. Our results reveal that thermal processing shows a tendency to increase tryptophan levels and reduce 5-hydroxytryptophan in colored cauliflowers. A reduction of the tryptophan and increase in serotonin contents in ‘Cheddar’, steamed or microwaved, was observed. A higher level of histamine was observed in the genotype ‘Forata’ after cooking, whereas melatonin levels were higher after steaming and microwaving. The lowest levels of biogenic amines and amino acids were observed in ‘Graffiti’. All the colored cauliflowers that were analyzed presented a chemical quality index (CQI) below the pre-established limits, indicating that are safe for consumption, even after cooking. We conclude that the levels of biogenic amines and amino acids in colored cauliflower are safe for human consumption and do not present health risks. Therefore, the consumption of these genotypes, raw or cooked, is a good source of bioactive compounds.

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