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Ion exchange
ion exchange The exchange of ions of the same charge between a solution (usually aqueous) and a solid in contact with it. The process occurs widely in nature, especially in the absorption and retention of water-soluble fertilizers by soil. For example, if a potassium salt is dissolved in water and... Read more |
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arsenic
arsenic , a semimetallic chemical element; symbol As; at. no. 33; at. wt. 74.9216; m.p. 817°C (at 28 atmospheres pressure); sublimation point 613°C; sp. gr. (stable form) 5.73; valence -3, 0, +3, or +5. Arsenic appears in several allotropic forms (see allotropy ); the stable form is a... Read more |
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Arsene D Arsonval
Arsonval, Ars Read more |
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San Fernando (Spain)
San Fernando , city (1990 pop. 83,923), Cádiz prov., S Spain, in Andalusia. An Atlantic port, it has a naval academy and arsenal, naval workshops, and an observatory. Salt is commercially obtained from nearby marshes by evaporation.... Read more |
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James Marsh
Marsh, James 9/2/1794–6/21/1846 ENGLISH CHEMIST With a distinguished career as an English chemist in the 1830s and 1840s, James Marsh (1794–1846) is historically well-known for the research and development of a dependable, simple laboratory test for the identification of minute... Read more |
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acid-base indicators
acid-base indicators organic compounds that, in aqueous solution, exhibit color changes indicative of the acidity or basicity of the solution. Common indicators include p -nitrophenol, which is colorless from p H 1 to 5 and yellow from p H 5 to 9; methyl orange, yellow in basic and neutral... Read more |
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nonmetal
nonmetal chemical element possessing certain properties by which it is distinguished from a metal . In general, this distinction is drawn on the basis that a nonmetal tends to accept electrons and form negative ions and that its oxide is acidic. Nonmetals are poor conductors of heat and... Read more |
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Arsenal of Democracy
ARSENAL OF DEMOCRACY Arsenal of Democracy was a phrase used by President Franklin D. Roosevelt (1882–1945) to describe the United States as he tried to arouse popular support for sending military aid to nations fighting against the Axis powers (Germany, Italy, and Japan, among others)... Read more |
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mineral
mineral inorganic substance occurring in nature, having a characteristic and homogeneous chemical composition, definite physical properties, and, usually, a definite crystalline form. A few of the minerals (e.g., carbon, arsenic, bismuth, antimony, gold, silver, copper, lead, mercury, platinum, and... Read more |
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atomic bomb
atomic bomb or A-bomb, weapon deriving its explosive force from the release of atomic energy through the fission (splitting) of heavy nuclei (see nuclear energy ). The first atomic bomb was produced at the Los Alamos, N.Mex., laboratory and successfully tested on July 16, 1945. This was the... Read more |
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Study findings on arsenic are outlined in reports from Tianjin University.
"Arsenic pollution...Arsenate (As(V)) and arsenite (As(III)) are two...inorganic arsenic species...report. "The removal of arsenic ions from water...arsenite from aqueous ... |
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Studies from Shenyang National Laboratory for Materials Science Add New...
Data detailed in "Arsenic (III,V) removal from aqueous solution by ultrafine a-Fe2O3 nanoparticles...process and used to remove arsenic ions from both lab-prepared and...concentrations, in ... |
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Capability of cationic water-soluble polymers in conjunction with...
...1970 to high arsenic concentrations...treatment solution to protect...employed for the removal of metal ions from diluted solutions, and they...inorganic ions has also...presence of arsenic in water...mainly ... |
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Researchers from Banaras Hindu University report on findings in chemical...
...biosorbent for removal of arsenic from aqueous solution. Optimization...for As(III) and 98.42% for As(V)) indicating...showed uptake of arsenic having a curved...initial metal ion ... |
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Research from A. Nilchi and Co-Researchers Yields New Findings on...
...species removal from aqueous media. The...removal of As(V) and As(III) was assessed...competing ions. We found...and As(V) species...the pH of solution, and it...selective ... |
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-Research and Markets: EPD Congress 2008: Proceedings of Sessions and...
...sintering; aqueous processing...Council. Aqueous Processing...of Iron(III)-Arsenic(V) Coprecipitates...Deployable Aqueous Lead Analysis...Rust for Its Removal (J. Gomes...Chloride Ion to the ... |
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Using aqueous processing to improve performance in metals production
...ranging from arsenic removal in industrial...refining solutions using chelating ion exchange...tapped in aqueous processing...environmentally sound arsenic-bearing...oxidation of As(III) to ... |