Gold Nanoparticles: Microbial Synthesis and Application in Water Hygiene Management

被引：169

作者：

Das, Sujoy K. ^{[1
]}

Das, Akhil R. ^{[2
]}

Guha, Arun K. ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Biol Chem, Kolkata 700032, W Bengal, India

[2] Indian Assoc Cultivat Sci, Polymer Sci Unit, Kolkata 700032, W Bengal, India

来源：

LANGMUIR | 2009年 / 25卷 / 14期

关键词：

NANOSCALE IRON PARTICLES; HIGH-YIELD SYNTHESIS; ENZYMATIC-ACTIVITY; CARBON NANOTUBES; PESTICIDES; MALATHION; REMOVAL; BIOSORPTION;

D O I：

10.1021/la900585p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A green chemical method to synthesize nanogold-bioconjugate and its eco-friendly promising role to purify contaminated waters has been described. Gold nanoparticles of 10 nm average diameter are produced on the surface of Rhizopus oryzae, a fungal strain, by in situ reduction of chloroauric acid (HAuCl4). The nanogold-bioconjugate (NGBC) showed strong adsorption capacity toward different organophosphorous pesticides. The EDXA study confirms adsorption of pesticides on the conjugate material surface. Morphological changes of the NGBC material after adsorption of organophosphorous pesticides were detected by atomic force micrographs. NGBC shows high antimicrobial activity against several Grain-negative and Gram-positive pathogenic bacteria as well as the yeasts Saccharomyces cerevisiae and Candida albicans. The treatment of microbial cells with NGBC caused rupture of cell membrane as revealed in scanning electron and fluorescence micrographs. These unique characteristics of NGBC have been successfully utilized to obtain potable water free from pathogens and pesticides in a single operation.

引用

页码：8192 / 8199

页数：8

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