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Preparations and characteristics of the ceramic balls for heavy metals absorption and antibacterial activities in the drinking water  

Park, Chun-Won (Department of Gemological Engineering, Dongshin University)
Park, Ra-Young (Department of Gemological Engineering, Dongshin University)
Park, Sun-Min (Processing Tech. Lab., KICET)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.15, no.6, 2005 , pp. 263-268 More about this Journal
Abstract
The ceramic balls impregnated with $20{\sim}40nm$ sized Ag colloid were examined for heavy metals absorption and antibacterial activities in the drinking water. The preparation conditions of ceramic ball that the porosity was excellent were as follows: starting material: 85 wt% $Ca_{10}(PO_4)_6(OH)_2$, binder: 5 wt% PVA and 15 wt% ${\alpha}-Ca_3(PO_4)_2$, heating temperature: $1000^{\circ}C$, duration: 3 hrs. The ceramic balls obtained under these conditions showed specific surface area of $110m^2/g$, pore size of $120{\mu}m$ and porosity of 80%. Also, as the results of a performance test on a rate of adsorbing and removing heavy metals in the drinking water by using the.AAS, heavy metals such as Zn, Mn, Fe and Cu were removed to the extent that their content became 0.03mg/l or lower after 1 day and they showed an excellent bactericidal activity that all coliforms were killed after 3 hrs.
Keywords
Ag colloid; Porous ceramic ball; Heavy metal adsorption; Antibacterial activity; Drinking water;
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