The appearance of iron oxide red pigment is light red to dark red powder. The refractive index is 2.94～3.22. Oil absorption, particle shape and size, surface area, relative density, etc. are determined by the preparation method.
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Some substances have the function of complexing inorganic salts, which can precipitate out the salts in the water and soften the hard water. Substances with this function are called water softeners.
Properties of Water Softener
Water softener can be used... (More)
For my M.Sc. graduation research at the Delft University of Technology, multiple Household Water Treatment Systems [HWTS] are compared. The HWTS are compared to a set of criteria related to health, social acceptance, and economic feasibility. Different contexts in which... (More)