Solid waste, including petroleum based waste oils, transformer oil or mineral oil are screened for the presence of polychlorinated biphenyls (PCBs). The analysis is typically performed by GC-ECD or GC-MS after clean-up using column chromatography, solid phase extraction (SPE), or dispersive solid phase extraction (d-SPE). Clean-up on silica or acidified silica removes polar constituents that ca...

Textile industries have their own importance in Indian economy. It consumes large amount of water and as a result huge amount of waste water is generated. Textile effluent comprises of suspended solids, mineral oils, residual oils and is characterized by high BOD (from 700 to 2000 mg/l) and COD loads. It is necessary to treat the waste water so that it does not have any threat to the environmen...

Are people fundamentally selfish? In textbook accounts of rational choice, economists generally take an agnostic position on this question: a person's tastes are her own business, and rationality requires merely that she act efficiently in pursuit of whatever preferences she happens to hold. This approach affords obvious flexibility. A person's anonymous gift to charity, for example, can be rea...

At present, the process of design and production unmanned aerial vehicles has been making progress in Russia, which is caused by relatively low cost, small size, absence life hazard to a pilot, stealth, self-sustainability, mobility compared manned aircraft. same time, two-stroke gasoline engines, possessing higher power-to-volume ratio, unsophisticated design, lower costs comparison with four-...

Jet oils are specialized synthetic oils used in high-performance jet engines. They have an appreciable hazard due to toxic ingredients, but are safe in use provided that maintenance personnel follow appropriate safety precautions and the oil stays in the engine. Aircraft engines that leak oil may expose others to the oils through uncontrolled exposure. Airplanes that use engines as a source of ...

A potential alternative fuel option is biodiesel, which produced mostly from natural resources due to the limited availability of petroleum supplies and environmental issues. Waste cooking oil (WCO) containing a high concentration free fatty acid (FFA) can be transformed into substantially benefits environment for reducing . The use smectite clay as catalyst in esterification reaction WCO with ...

it is known that native oil-degrading microorganisms are ubiquitous. they can be isolated from contaminated soils. in this study, biodegradation experiments were carried out to evaluate the efficiency of pollutant removal by adding the selected microorganisms. five mixed cultures and 3 single bacteria strains, pseudomonas sp., arthrobacter sp. and mycobacterium sp. were isolated from hydrocarbo...

Utilizing heat-generated cooling in vehicles offers the opportunity to reduce the amount of fuel used today for air conditioning. The U.S. uses approximately 7.1 billion gallons of gasoline each year for air conditioning in vehicles. By using waste heat as the primary energy source for heat-generated cooling, we have the potential to reduce the national fuel use by 7.1 billion gallons. An engin...