摘要

纳米银的生物合成及其在饮用水微生物处理中的应用

作者(年代):哈里库马，小约瑟夫，文殊沙

水的微生物污染是一个世界性的环境问题。纳米技术是解决这一问题的有效工具之一。纳米银对微生物具有剧毒作用，具有很强的杀生物作用，低浓度时对人体无毒。这项工作的目的是确定生物合成银纳米颗粒用于水处理的抗菌潜力。利用微生物合成银纳米颗粒;大肠埃希菌克雷伯氏菌和番木瓜植物提取物。通过紫外可见光谱、扫描电子显微镜(SEM)和能量色散x射线分析(EDS)证实了其存在。银纳米颗粒吸附在颗粒活性炭上，用作处理污染水的细菌过滤器。采用菌落形成单元(CFU)和最可能数(MPN)对银纳米材料的抑菌作用进行了研究。计算了银纳米颗粒对微生物菌株的影响。Ag纳米颗粒的时间和剂量依赖性研究表明，颗粒的有效性随颗粒剂量和处理时间的增加而增加。 Also the effect of Ocimum tenuiflorum (Tulasi) and Caesalpinia sappan (Pathimugam) extract on the antimicrobial activity of silver nanoparticles in water treatment was studied. The obtained results showed that the Ocimum tenuiflorum was more efficient compared to Caesalpinia sappan in the treatment of water. Our work suggests that silver-adsorbed granular activated carbon can be used as an excellent antibacterial media and would have several applications in water treatment system. Biosynthetic method is an economical, efficient, ecofriendly simple process and can be used as an alternative to chemical and physical one