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Suggested reading for the topic: Oxygen


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Lenntech reading suggestions for the topic: Oxygen

1. Oxygen bars - Lenntech

... Oxygen bars-Lenntech Oxygen bars What do we breath? Oxygen depletion Importance of oxygen OXYGEN BARS Are there any risks in breathing high purity oxygen? Effects of breathing high purity oxygen What do we breath? The air we breathe is generally composed of 78 %nitrogen and 21 %oxygen by volume. The other gases together, called trace gases, comprise the remaining 1 %. These are argon, carbon dioxide, neon, helium, methane, krypton, hydrogen and xenon. The level of impurities ...

Oxygen enrichment chambers

2. Why the oxygen dissolved in water is important

... Why the oxygen dissolved in water is important? Why Dissolved Oxygen is Important Dissolved oxygen The dissolved oxygen (DO) is oxygen that is dissolved in water. The oxygen dissolves by diffusion from the surrounding air; aeration of water that has tumbled over falls and rapids; and as a waste product of photosynthesis. An simplified formula is given below: Photosynthesis (in the presence of light and chlorophyll ): Carbon dioxide+Water-Oxygen+Carbon-rich foods ...

3. Oxygen (O) - Chemical properties, Health and Environmental effects

... Oxygen (O)-Chemical properties, Health and Environmental effects Oxygen-O Chemical properties of oxygen-Health effects of oxygen-Environmental effects of oxygen Atomic number 8 Atomic mass 15.999 g.mol -1 Electronegativity according to Pauling 3.5 Density 1.429 kg / m 3 at 20 ° C Melting point -219 ° C Boiling point -183 ° C Vanderwaals radius 0.074 nm Ionic radius 0.14 nm (-2) Isotopes 4 Electronic shell [He] 2s 2 2p 4 Energy of first ionisation 1311 kJ.mol -1 Energy of second ionisation unknown ...

Popular related Subjects:

Oxygen generators

Water chemistry FAQ

Oxygen measurement

Water ecology

Carbon dioxide

Air FAQ 4. ozone generation

... ozone generation Ozone generation Cooling water temperature Humidity inlet air Purity gas inlet Ozone versus oxygen inlet Because of its relatively short half-life, ozone is always generated on-site by an ozone generator. The two main principles of ozone generation are UV-light and corona-discharge. Ozone generation by corona-discharge is most common nowadays and has most advantages. Advantages of the corona-discharge method are greater sustainability of the unit, higher ozone production and higher cost affectivity. UV-light can be feasible where production of small amounts of ozone is desired (e.g. ...

5. hydrogen peroxide as a disinfectant

... legislation combinations Hydrogen peroxide Most people know hydrogen peroxide as a compounds that bleaches hair. It can also be used for water disinfection. When was hydrogen peroxide discovered? Louis Jacque Thenard discovered hydrogen peroxide in 1818. Hydrogen peroxide consists of oxygen and hydrogen atoms. These can be found everywhere on earth. Hydrogen peroxide contains a combination of two hydrogen atoms and two oxygen atoms. In the environment, hydrogen peroxide can be found in very low concentrations. Gaseous hydrogen peroxide is produced by photo chemical reactions in the atmosphere surrounding the earth ...

6. FAQ's Ozone - Lenntech

... work? How is ozone produced? What is the half-life of ozone? Is ozone harmful and what are the effects? How can you tell the level of ozone? QUESTION: WHAT IS OZONE? ANSWER: Ozone is a molecule that consists of three oxygen atoms (O 3 ), with a negative electric charge. The ozone molecule is very unstable and has a short half-life. Therefore, it will decay after some time into its original form: oxygen (O 2, according reaction presented below) 2O 3 3O 2 In ...

7. Oxygen concentrators - Lenntech

... Oxygen concentrators-Lenntech Oxygen Generator Oxygen Concentrators and generators Search: Contact us Our oxygen concentrators (also called oxygen generator) are available in the range of 0, 5 l / m to 158 l / m and can be purchased with or without compressor. With these oxygen generators oxygen can be produced from ambient air. If compressed air is available the oxygen concentrator alone is sufficient. Features: Reliable Oxygen Production Rugged, Environmentally Tolerant Design Compact & Lightweight for Maximum Design Flexibility Constant Pneumatic Impedance Constant Delivery Pressure Benefits: No ...

8. Water treatment chemicals - Lenntech

... us For the chemical treatment of water a great variety of chemicals can be applied. Below, the different types of water treatment chemicals are summed up. Algaecides Antifoams Biocides Boiler water chemicals Coagulants Corrosion inhibitors Disinfectants Flocculants Neutralizing agents Oxidants Oxygen scavengers pH conditioners Resin cleaners Scale inhibitors Algaecides Algaecides are chemicals that kill algae and blue or green algae, when they are added to water. Examples are copper sulphate, iron salts, rosin amine salts and benzalkonium chloride. Algaecides are effective against algae, but are not very usable for algal blooms ...

9. Water ecology FAQ

... up into three life zones, the euphotic zone, the bathyal zone and the abyssal zone. The subdivision is based on the penetration of sunlight. The euphotic zone is the upper oceanic zone, where producer species produce oxygen. Nutrient levels are low and dissolved oxygen levels are high. The euphotic zone makes up about 90 %of the oceanic surface, whereas only about 10 %of the world's fish species are found here. Sunlight penetration rates are high in this oceanic zone. The bathyal zone is hardly lit and the abyssal ...

10. Water treatment chemicals

... For the chemical treatment of water a great variety of chemicals can be applied. Below, the different types of water treatment chemicals are summed up. Algaecides Antifoams Biocides Boiler water chemicals Coagulants Corrosion inhibitors Disinfectants Flocculants Neutralizing agents Oxidants Oxygen scavengers pH conditioners Resin cleaners Scale inhibitors Algaecides Algaecides are chemicals that kill algae and blue or green algae, when they are added to water. Examples are copper sulphate, iron salts, rosin amine slats and benzalkonium chloride. Algaecides are effective against algae, but are not very usable for algal blooms ...

11. Water ecology FAQ

... up into three life zones, the euphotic zone, the bathyal zone and the abyssal zone. The subdivision is based on the penetration of sunlight. The euphotic zone is the upper oceanic zone, where producer species produce oxygen. Nutrient levels are low and dissolved oxygen levels are high. The euphotic zone makes up about 90 %of the oceanic surface, whereas only about 10 %of the world's fish species are found here. Sunlight penetration rates are high in this oceanic zone. The bathyal zone is hardly lit and the abyssal ...

12. ozone introduction

... ozone introduction Ozone: introduction Search: Contact us Ozone is a molecule that consists of three negatively charged oxygen atoms. The ozone molecule is very unstable and has a short half-live, causing it to fall back into its original form after a while, according to the following reaction mechanism: 2O 3-3O 2 Principally, an ozone molecule is nothing but an oxygen molecule that has received an extra oxygen atom by electric high voltage. Ozone is naturally produced through certain types of chemical reactions. The most commonly known example is ...

13. Water pollution FAQ

... are several classes of water pollutants. The first are disease-causing agents. These are bacteria, viruses, protozoa and parasitic worms that enter sewage systems and untreated waste. More information on health effects of microrganisms A second category of water pollutants is oxygen -demanding wastes; wastes that can be decomposed by oxygen-requiring bacteria. When large populations of decomposing bacteria are converting these wastes it can deplete oxygen levels in the water. This causes other organisms in the water, such as fish, to die. A third class of water pollutants is water-soluble ...

14. Frequently used definitions in aquatic ecosystems

... , which may be chemical, physical or biological (WHO 1993). Biomonitoring: the use of living organisms to test the suitability of effluent for discharge into receiving waters and to test the quality of such waters downstream from a discharge. BOD: Biochemical Oxygen Demand, the amount of oxygen consumed by bacteria and other microorganisms. Buffer: a solution that minimizes changes in hydrogen ion concentration that would otherwise occur as a result of a chemical reaction. Buffering agent: drives an acidic or alkaline solution to neutral. Chronic toxicity: ...

15. Water pollution FAQ

... are several classes of water pollutants. The first are disease-causing agents. These are bacteria, viruses, protozoa and parasitic worms that enter sewage systems and untreated waste. More information on health effects of microrganisms A second category of water pollutants is oxygen -demanding wastes; wastes that can be decomposed by oxygen-requiring bacteria. When large populations of decomposing bacteria are converting these wastes it can deplete oxygen levels in the water. This causes other organisms in the water, such as fish, to die. A third class of water pollutants is water-soluble ...

16. Particles, scaling and biofouling

... These microrganisms have damaging, often irreversible effects on nano filtration and Reverse Osmosis systems. The types of microrganisms, their growth factors and concentration in a membrane system greatly depend on critical factors, such as temperature, the presence of sunlight, pH, dissolved oxygen concentrations and the presence of organic and inorganic nutrients. Microrganisms can enter the system through water or air, or both. Aerobic (oxygen -dependent) bacteria usually live in an environment of warm, shallow and sunlit water, with a high dissolved oxygen content, a pH ...


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