The use of silver-coated ceramic beads for sterilization of Sphingomonas sp. in drinking mineral water

Dong Wook Han, Min Sub Lee, Mi Hee Lee, Masakazu Uzawa, Jong Chul Park

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


It has been established that certain heavy metals including silver have antibacterial properties, and that they may be useful components of antibacterial materials. This knowledge of the antibacterial activity of silver has already been put to use to decrease the occurrence of urinary catheter infections and to develop topical antibacterial agents for burn victims. In this study, the ability of silver-coated ceramic beads (Ag-CBs), sintered at 375, 400, 425, or 450°C, to sterilize Sphingomonas sp. in commercial mineral water was evaluated. Over 3% (w/v) Ag-CBs in mineral water completely sterilized Sphingomonas sp. after 6 h, regardless of the sintering temperature. The Ag-CBs sintered at 400°C were the most useful since they did not produce clouding in the water and the bacteria were effectively killed. The antimicrobial activity of the 400°C-sintered Ag-CBs was comparable to that of free silver ions at 15 μg/l, showing that the silver ions released from the Ag-CBs resulted in the complete sterilization of the microbial cells in mineral water. These results suggest that Ag-CBs present an easy-to-use option for mineral water sterilization.

Original languageEnglish
Pages (from-to)921-924
Number of pages4
JournalWorld Journal of Microbiology and Biotechnology
Issue number6-7
Publication statusPublished - 2005 Oct

Bibliographical note

Funding Information:
This work was supported by the Ministry of Health and Welfare of the Republic of Korea grant (No. 02-PJ3-PG3-31402-0018).

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Physiology
  • Applied Microbiology and Biotechnology


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