多功能型天然高分子水处理剂的研究

化学药剂一直以来在水处理领域里发挥着重要作用,主要有混凝剂/絮凝剂、杀菌剂、阻垢剂等.传统的水处理剂往往功能较为单一,存在种类繁多、投加量大、设备复杂、操作繁琐等诸多问题.且不同的药剂之间还有可能互相抑制,降低水处理效率.因此,研发兼具混凝/絮凝、抑/灭菌、阻垢等多功能水处理剂已得到人们的广泛关注.近年来,天然高分子水处理剂由于其绿色环保等特点而备受瞩目,因此研发多功能型天然高分子水处理剂具有重要的科学和现实意义.然而,到目前为止,天然高分子水处理剂的开发与应用还十分有限,作用机制也很不清楚,均有待进一步的深入研究.本文首先依次介绍了混凝剂/絮凝剂、杀菌剂与阻垢剂,并从其作用机理与材料结构特征出发,对其多功能性的实现进行了探讨;重点介绍目前絮凝-抑/灭菌双功能和絮凝-阻垢双功能天然高分子水处理剂的研发进展;同时从构效关系等角度出发,展望了多功能型天然高分子水处理剂的未来发展.

Antibacterial Effect of Lavender （Lavandula） Flavor （Volatile）

The objective of this study was to test the essential oil-emitted flavor （volatile） of lavender by bacteria killing potency using Escherichia coli, methicillin-resistant Staphylococcus aureus （MRSA）, enterohemorrhagic E. coli O157：H7, Pseudomonas aeruginosa and Candida albicans. Antibacterial activity was assessed by creating of the bacterial growth curve in the liquid medium cultivation and the growth inhibition on the agar plate cultivation. Citronellal, one of compounds in Rosa rugose oil, was used as a positive control for comparison in activity. The results showed that lavender and citronellal flavor （volatile） or oil respectively demonstrated bacteria killing effect in both analytical manners. However, P. aeruginosa resisted bacteria killing potency of lavender （citronellal） oil or oil-emitted flavor. It could be concluded that both lavender oil-emitted flavor and oil showed bacteria killing potency. Lavender oil （or oil-emitted flavor） will be expected to apply for the patient waiting room to disinfect in air along with the mental relaxation of the patient.