Within this work, field observations of structure and intensity of motor transport streams were conducted, the information about the operating sources of atmosphere pollution from the enterprises in the city of Naberezhnye Chelny, their qualitative and quantitative structure, physical parameters were collected, processed and systematized. On the basis of the obtained data a summary calculation of emissions of the industrial enterprises and motor transport was carried out, the list of the priority polluting substances was defined, the complex index of pollution of the atmosphere was calculated, highways with the greatest transport loading were defined. On the basis of instrumental control the measurements of quality of atmospheric air near highways were carried out, actions for optimization of transport streams and decrease in negative impact were offered.
In this paper, we studied the parameters of the process of separation of oil emulsion using a dynamic membrane of ultrafiltration PTFEg-PSd. A polymer membrane with a dynamic layer of polystyrene particles with sizes from 55 to 72 nm was obtained on a substrate of hydrophilic polytetrafluoroethylene (PTFE). The results of scanning electron microscopy showed the formation of a layer of spherical polystyrene particles on the membrane surface. The properties of a dynamic membrane were studied: porosity, moisture capacity, and wettability. After applying the polystyrene layer, an increase in the hydrophobicity of the surface layer of the membrane was established. For membrane separation, a 1% oil emulsion was prepared by dispersing the carbonaceous oil. The retention capacity of membranes for oil products from 1% oil emulsion was 96.4%, with a specific productivity of 113 dm3/m2·h which is not inferior to the performance of a commercial UPM-100 ultrafiltration membrane. Particle sizes of the dispersed phase in a 1% oil emulsion are distributed in the range from 229 to 1476 nm, after separation of the emulsion by a dynamic membrane, oil particles with sizes from 134 to 236 nm were detected in the filtrate, which indicates the removal of the bulk of the dispersed phase from the emulsion by ultrafiltration membranes.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.