Method for manufacturing ceramic balls for water treatment

A method for manufacturing ceramic balls for water treatment, comprising the steps of:

• (a) thoroughly dissolving borax (Na2B4O7.10H2O) and copper sulfate (CuSO4.5H2O) in an equivalent ratio of 1:1 in water, and drying the solution in accordance with a heating process, to prepare a first composition (A);
• (b) mixing nitric acid and particulate silver in an equivalent ratio of 1:1, adding particulate silica to the mixture of nitric acid and particulate silver under a heating condition, to prepare a second mixture, and drying the second mixture in accordance with an evaporation process, to prepare a second composition (B);
• (c) adding 200 parts by weight of distilled water to 100 parts by weight of spherical ceramic bodies, to prepare a third mixture, adding more than 3 parts by weight of the first composition (A) to the third mixture under a heating condition, to prepare a fourth mixture, and heating the fourth mixture until the total weight of the fourth mixture is reduced by half;
• (d) adding more than 8 parts by weight of the second composition (B) to the weight-reduced fourth mixture, to prepare a fifth mixture, and drying the fifth mixture, to obtain ceramic balls coated with the first composition (A) and the second composition (B);
• and
• (e) sufficiently dehydrating the ceramic balls at a temperature of 400° C. to 500° C.