查看文章

This study involved preparation of a functionalized glass-AgNP nanocomposite. Its antimicrobial effect was tested using a few pathogenic bacteria commonly present in drinking water biofilms ie, Escherichia coli, Pseudomonas aeruginosa, Burkholderia cepacia and

Acinetobacter baumanii. Functionalized glass-AgNP nanocomposite was prepared through immobilization of colloidal AgNPs on a (3-Aminopropyl)-triethoxysilane (APTES) functionalized glass substrate. FEG-SEM confirmed uniform and homogenous distribution of AgNPs on the surface andEDX confirmed significantloading of silver on the surface. AFM also confirmed significant loading of AgNPs on the glass surface showing increase in surface roughness from 0.542 nmto 3.29 nm after AgNP immobilization. Complete disinfection of 100 ml water (103 CFU/ml) was achieved within 60-70 minutes for all the strainsusingthe glass-AgNPs nanocomposite (1x1 cm2) in a batch reactor. ICP-AES analysis confirmed minimal leaching of silver in the treated water (< 100 ppb, US EPA). This confirms the applicability of this AgNP-immobilized glass substrate as an effective and safeantimicrobial agent for drinking water disinfection.