Binchotan activated coals are charcoal sticks of 10cm long, and 1cm diameter. They are used to improve the quality of drinking water, and water for tea.
For drinking water : place 1 or more coals in a jug of water (1 coal for half liter of water). Leave for at least one hour after filling, and keep the stick permanently in the water.
For tea: Place a stick with the water in your kettle, and heat. Perpare your tea by pourring water into the teapot, without the stick.
Adsorption (not to be confused with absorption) is the phenomenon in which molecules present in suspension in a liquid (or a gaz) bind to the solid surface with which they come into contact.
According to this principle, particles responsible for unpleasant tastes and odors of tap water stick to the surface of coal.
This principle is commonly used in the industry; certain devices using activated carbon to capture chlorine, pesticides and herbicides, benzene, radon, solvents and other chemicals. Activated coals are very often found in powder for clarifying liquids such as beer.