Papers by Keyword: Chemicals

Abstract: CIPP renovation methods are often used for renovation of sewers and water mains. They can also be used for renovation of gas and product pipelines. However, the presence of chemicals in these pipelines cannot be excluded. For this reason, the ability of CIPP liners to resist chemicals should be examined. This paper deals with problematics of influence of chemicals (acids and bases) on CIPP liners. Visual changes can be observed using an optical microscope. Structural changes are evident from the results of short-term bending tests.

Abstract: In order to maintain the volume of oil and gas supplies, the number of oil and gas wells increases every year, drilling platforms are built, which proportionally increases the amount of sludge and drilling waste mud, which must be recycled. The research gives light to the danger of introducing chemical substances into various natural environments from industrial and anthropogenic sources on an example of drill cuttings from oil fields of Tomsk region.

Abstract: To better understanding the lubrication condition between a polyvinyl acetal (PVA) brush and cleaning surfaces, we measured the frictional force between the PVA roller brushes and the semiconductor wafers with various films immersed in chemicals. The frictional force showed different tendencies depending on the combination of chemicals and surface films. Especially, the large fluctuation of friction force was observed under the combination of Cu and NH₄OH.

Abstract: With concern for chemicals leak in transportation, there is an urgent need for a sensor which can quickly and accurately detect chemicals. In this study, a high-sensitivity gas sensor was demonstrated, which is based on high-field asymmetric waveform ion mobility spectrometry technology with corona discharge (CD) used as the ionization source to product gas-phase ion samples, which can get the response in one second. The effects of dispersion voltage and moisture were investigated.

Abstract: Unsafe acts and unsafe conditions are the main causes for all accidents in firework Industries. The accidents occurr in the fireworks industries are more severe than the accidents occurr in any other industries, because fire and explosives are the common causes of the accidents in fireworks industries. The aim of the study is to analyse the accidents in fireworks industries and recommend to build safety culture.

Abstract: In an effort to direction convert biomass by means of pyrolysis for fine chemicals as a substitute fuel, some inorganic matters were chosen to investigate the possibility of improving the catalysis of biomass pyrolysis. Inorganic acids are catalysts to be found effective for giving high selectivity to furfural chemicals.

Abstract: In accordance with MARPOL convention, reformates and other aromatic oil belong to Oils, and their marine transportation should comply with Convention Annex I. While these goods may contain some NLSs defined in Annex II, and their transportation should comply with Annex II and IBC code. To make a distinction between the goods defined in Annex I and Annex II, the technical instrument and distinction in relevant industries are researched, in the paper the related definitions and present distinction methods in relevant conventions are analyzed, and a modified distinction method is put forward.

Abstract: At present, the environmental risk has become science foundation and one of important basis of the environmental risk management and environmental decision-making. This paper based on the chemical properties of carbon disulfide including physical and chemical properties, toxicity, explosive harms characteristics are studied and puts forward some preventive measures.