Search results
Results from the WOW.Com Content Network
The chlorine cycle (Cl) is the biogeochemical cycling of chlorine through the atmosphere, hydrosphere, biosphere, and lithosphere. Chlorine is most commonly found as inorganic chloride ions, or a number of chlorinated organic forms. [1] [2] Over 5,000 biologically produced chlorinated organics have been identified. [3]
Evaporation under reduced pressure allows it to be concentrated further to about 40%, but then it decomposes to perchloric acid, chlorine, oxygen, water, and chlorine dioxide. Its most important salt is sodium chlorate, mostly used to make chlorine dioxide to bleach paper pulp. The decomposition of chlorate to chloride and oxygen is a common ...
The chlorine atom, written often as Cl., behaves very differently from the chlorine molecule (Cl 2). The radical Cl. is long-lived in the upper atmosphere, where it catalyzes the conversion of ozone into O 2. Ozone absorbs UV-B radiation, so its depletion allows more of this high energy radiation to reach the Earth's surface.
THE UPPER ATMOSPHERE (WHTM) — On September 25, 1974, Professors Mario Molina and F. Sherwood Rowland published a paper in the science journal Nature which would lead to widespread bans of ...
The residence time of 36 Cl in the atmosphere is about 1 week. Thus, as an event marker of 1950s water in soil and ground water, 36 Cl is also useful for dating waters less than 50 years before the present. 36 Cl has seen use in other areas of the geological sciences, forecasts, and elements. In chloride-based molten salt reactors the ...
A single chlorine atom is able to react with an average of 100,000 ozone molecules before it is removed from the catalytic cycle. This fact plus the amount of chlorine released into the atmosphere yearly by chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) demonstrates the danger of CFCs and HCFCs to the environment. [21] [22]
Earlier this week, the chlorine smoke closed schools and led to a shelter-in-place order for more than 90,000 residents east of Atlanta while some were told to evacuate after emergency officials ...
Chloride can be oxidized but not reduced. The first oxidation, as employed in the chlor-alkali process, is conversion to chlorine gas. Chlorine can be further oxidized to other oxides and oxyanions including hypochlorite (ClO −, the active ingredient in chlorine bleach), chlorine dioxide (ClO 2), chlorate (ClO − 3), and perchlorate (ClO − 4).