Notice of Retraction: Study on Improvement of Environmental Pollution from Hydrometallurgy - The Comprehensive Recovery of Zinc Leaching Residue as an Example

Fly ash, which is nominally solid wastes generated during the combustion of coal, contains plenty of valuable minerals. Thus, comprehensive recovery of these valuable minerals not only solves environmental pollution problems but also realizes secondary utilization and added values increase of fly ash resources. The Joint process flow of flotation and magnetic separation was adopted in the experiments to recover carbon and iron from fly ash comprehensively, and good technical indexes had been obtained. Flotation separation was conducted on a sort of fly ash whose ignition loss was about 17%. And the ignition loss of concentrates and tailings obtained are above 55% and below 5%, respectively, which can be for further use. Based on the relatively high contents of iron in flotation tailings, magnetic separation for iron enrichment was carried on subsequently. After concentration, the content of Fe2O3 in iron concentrate is above 60%.

Download Full-text

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

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100053061 ◽

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.

Download Full-text

Review of Environmental Pollution and Mental Health.

Contemporary Psychology ◽

10.1037/0012857 ◽

1974 ◽

Vol 19 (7) ◽

pp. 568-568

Author(s):

GEORGE W. ALBEE

Keyword(s):

Mental Health ◽

Environmental Pollution

Download Full-text

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

World of OIL Products the Oil Companies Bulletin ◽

10.32758/2071-5951-2020-0-5-60-64 ◽

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.

Download Full-text