All Bentonite has a high pH of 8 to 10 but Sodium Bentonite will have a higher pH than Calcium Bentonite. Anything over 7.5 is considered high PH and on the alkaline side.
NOTE: pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is a measure of the relative amount of free hydrogen and hydroxyl ions in the water. There are four types of Bentonite clay:
Most Bentonite deposits are high in either sodium (i.e. Sodium Bentonite clay) or calcium (i.e. Calcium Bentonite). Calcium Bentonite is the rarest of the 4 types of Bentonite clay. Natural Calcium Bentonite is a green clay and has high adsorption and absorption properties. Calcium Bentonite is alkaline with a pH typically between 8 and 9.
Bentonite clay is composed of ash made from volcanoes that was deposited into fresh or seawater millions of years ago. Seawater = Sodium Bentonite. Bentonite containing sodium (i.e. Sodium Bentonite) will swell (absorb) more, making it ideal for industrial applications.
Bentonite containing less sodium (i.e. Calcium Bentonite) is better for human consumption. Chemically, Calcium Bentonite is hydrated sodium calcium aluminum magnesium silicate hydroxide (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2·nH2O. Potassium, iron, and other cations are common substitutes, and the exact ratio of cations varies with source.
Calcium Bentonite is the highest adsorber. The adsorbing ability of the clay is determined by the ionic power of “substitution.” calcium exchanges places with other elements on the outside of the lattice giving it the ability to adsorb referring to “ionic substitution’, exchanging itself for the positively charged toxins in your body.
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