Aluminum
The name aluminum is derived from the ancient name for alum (potassium aluminum sulphate), which was alumen (Latin, meaning bitter salt). Alu...
What is ammonia?
Ammonia is one of the most widely produced chemicals in the United States. In pure form, it is
known as anhydrous ammonia. Ammonia is...
Antimony
Antimony si a semimetallic chemical element which can exist in two forms: the metallic form is bright, silvery, hard and brittle; the non met...
Arsenic
Arsenic appears in three allotropic forms: yellow, black and grey; the stable form is a silver-gray, brittle crystalline solid. It tarnishes r...
What is arsenic?
Arsenic is a semi-metal, a member of the nitrogen family. It occurs naturally in the earth and in the seas. It is odorless and tastel...
The first organism able to substitute one of the six chemical elements crucial to life has been found.
The bacterium, found in a California lake, use...
Inadequate measures of water quality have been used in many studies of the health effects associated with water supplies in developing countries. The...
Barium
Barium is a silvery-white metal that can be found in the environment, where it exists naturally. It occurs combined with other chemicals, such ...
A biofilm is a surface deposit of bacteria, other microorganisms, and organic and inorganic materials that accumulate within a slime layer. Biofilms c...
BOD (biochemical oxygen demand)
The amount of oxygen required by aerobic microorganisms to decompose the organic matter in a sample of water, such as...
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