DEFLUORIDATION OF WATER
First Claim
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1. A method comprising:
- (a) preparing a liquid mixture comprises at least one natural media, alum and a calcium source;
(b) recovering a bio-ceramic adsorbent from the liquid mixture, wherein the bio-ceramic adsorbent comprises an initial fluoride adsorption capacity, in water, of at least about 5 mg/g.
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Abstract
Bio-ceramic compositions for removing fluoride from water, and methods for making the same are disclosed. The bio-ceramic composition may comprise alumina, calcium oxide, sulfur, and/or carbon. The bio-ceramic composition may be produced from at least one natural media, such as chitin or eggshell membrane. The bio-ceramic composition may realize an initial fluoride adsorption capacity, in water, of at least about 5 mg/g.
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20 Claims
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1. A method comprising:
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(a) preparing a liquid mixture comprises at least one natural media, alum and a calcium source; (b) recovering a bio-ceramic adsorbent from the liquid mixture, wherein the bio-ceramic adsorbent comprises an initial fluoride adsorption capacity, in water, of at least about 5 mg/g. - View Dependent Claims (2, 3, 4, 5, 6)
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- 7. A bio-ceramic adsorbent produced from at least one natural media, the adsorbent comprising 15-65 wt. % of a metal oxide, 10-40 wt. % calcium oxide, 5-20 wt. % sulfur, and 1-5 wt. % carbon, wherein the bio-ceramic adsorbent comprises an initial fluoride adsorption capacity, in water, of at least about 5 mg/g.
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20. An adsorbent produced from at least one natural media, the adsorbent comprising α
- -alumina and β
-alumina, wherein the adsorbent is capable of removing fluoride from water, wherein the adsorbent comprises an initial fluoride adsorption capacity of at least about 5 mg/g, wherein the initial fluoride adsorption capacity is achievable in the presence of at least about 500 mg/L of sulfate anions, and wherein the initial fluoride adsorption capacity is achievable when the water has a pH of from about pH 4 to about pH 9.
- -alumina and β
Specification