A novel Fe-Al-La trioxide composite: synthesis, characterization, and application for fluoride ions removal from the water supply

FLUORINE CONTENT IN WATER OF CENTRALIZED WATER SUPPLY IN THE VLADIMIR REGION

Hygiene and Sanitation ◽

10.18821/0016-9900-2019-98-7-701-706 ◽

2019 ◽

Vol 98 (7) ◽

pp. 701-706 ◽

Cited By ~ 1

Author(s):

T. A. Trifonova ◽

Anton A. Martsev ◽

O. G. Selivanov ◽

A. A. Podolets

Keyword(s):

Drinking Water ◽

Water Supply ◽

Fluorine Content ◽

The Body ◽

Fluoride Ions ◽

Natural Factor ◽

Maximum Permissible Concentrations ◽

Vladimir Region ◽

The Individual ◽

Supply Water

Introduction. Inadequate water is the second risk factor for the development of diseases after poverty. Therefore, one of the most important tasks in the sphere of creating the sanitary and epidemiological welfare of the population of the Russian Federation is to provide it with benign drinking water, safe in epidemiological terms and harmless in chemical composition. The purpose of this work. Conducting a hygienic assessment of the quality of drinking water for the content of this trace element at the regional level is very relevant as fluorine is important for human health, and the main way of its entry into the body is water. Material and methods. The paper presents data of own research for 2018. During this period, there were studied about 150 water samples of centralized water supply in the Vladimir region, most of which were selected in the largest settlements. The content of fluoride ions in water was determined by the method of capillary electrophoresis (HDPE F 14.1: 2: 4.157-99). As a result of the study, the Vladimir region was found to be characterized by a significant differentiation (from 0.05 mg/l to 2.75 mg/l) in the content of fluoride ions in the centralized supply water. A map was constructed for ranking the regions of the region for the content of fluoride ions in the centralized supply water. Discussions. In eight districts of the region, the fluorine content in water is much lower than the optimal values; in five regions, an exceeding the maximum permissible concentrations was detected; and only in three regions the average values are close to optimal. The different content of fluorine in water in the districts of the region is due to the natural factor of the given geographic zone. Conclusion. Providing the population of the region with benign drinking water requires a set of various measures with the development and implementation of programs to improve the water supply of populated areas. At the forefront is the individual prevention of tooth decay and fluorosis, in which an important role is played by health education, advertising of preventive drugs that have been praised by specialists.

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Enumeration and Identification of Asbestos Fibres in Water

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010005264x ◽

1974 ◽

Vol 32 ◽

pp. 526-527 ◽

Cited By ~ 1

Author(s):

O. Mudroch ◽

J. R. Kramer

Keyword(s):

Water Supply ◽

Water Samples ◽

Drainage Basin ◽

Lake Superior ◽

Research Work ◽

List Type ◽

The West ◽

Asbestos Fibre ◽

Amphibole Asbestos

Approximately 60,000 tons per day of waste from taconite mining, tailing, are added to the west arm of Lake Superior at Silver Bay. Tailings contain nearly the same amount of quartz and amphibole asbestos, cummingtonite and actinolite in fibrous form. Cummingtonite fibres from 0.01μm in length have been found in the water supply for Minnesota municipalities.The purpose of the research work was to develop a method for asbestos fibre counts and identification in water and apply it for the enumeration of fibres in water samples collected(a) at various stations in Lake Superior at two depth: lm and at the bottom.(b) from various rivers in Lake Superior Drainage Basin.

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Bacterial biofilm behavior in water-supply lines of dental units

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100124811 ◽

1992 ◽

Vol 50 (1) ◽

pp. 882-883

Author(s):

B.D. Tall ◽

K.S. George ◽

R. T. Gray ◽

H.N. Williams

Keyword(s):

Water Supply ◽

Medical Devices ◽

Biofilm Formation ◽

Bacterial Biofilm

Studies of bacterial behavior in many environments have shown that most organisms attach to surfaces, forming communities of microcolonies called biofilms. In contaminated medical devices, biofilms may serve both as reservoirs and as inocula for the initiation of infections. Recently, there has been much concern about the potential of dental units to transmit infections. Because the mechanisms of biofilm formation are ill-defined, we investigated the behavior and formation of a biofilm associated with tubing leading to the water syringe of a dental unit over a period of 1 month.

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