Abstract

• In this research work, the silver colloidal solution was synthesized by using silver nitrate and watery extract of bamboo leaves as reducing agents. The optimum ratio of red clay, brown clay and rice husk (6:3:1 w/w) were used for preparing porous ceramic filters. Silver colloidal solution was coated on prepared ceramic filter and silver coated filter, was obtained. EDXRF and SEM were used to examine the silver percent content of coated and uncoated ceramic filters. EDXRF analysis showed that silver (0.166 %) was present in coated filter and absent in uncoated filter. The antimicrobial activities of uncoated filter and coated filter by agar well diffusion method were tested on Bacillus pumilus, Bacillus subtilis, Candida albicans, Escherichia coli, Pseudomanas fluorescens and Staphylococcus aureus strains. The coated filter showed high antimicrobial activities on six microorganisms but not on the uncoated filter. Based on the results, prepared silver coated ceramic filters may be used as ecofriendly, environmental friendly and most effective filter material for water treatment due to its antimicrobial activities.