混凝过程中微絮体形貌的AFM液池成像观测与表征

采用扫描探针显微镜液池成像技术,对混凝过程中絮体的微观形貌进行了观测与表征.结果表明,原子力显微镜液池成像技术可以对混凝过程中的微絮体进行形貌表征和数字描述,并证实在实际印染工业尾水的微絮凝过滤试验处理过程中,微絮凝时间为2min,搅拌强度为100s-1时可以达到优化的处理效果.这也说明液池成像技术能够较好的反映混凝过程中微絮体的形貌变化特征,从而实现对环境微观界面过程的原位观测与表征.

Characterization of microflocs for the coagulation optimization by AFM fluid imaging

Atomic force microscopy(AFM) was applied to characterize the morphological changes of microflocs in the coagulation process.By the use of AFM fluid imaging technique,optimized operational conditions for 2 min of mirco-flocculation time and 100 s-1 of the agitation intensity(G value) were obtained in the Micro-Flocculation Filtration of dye-printing industrial tailing wastewater with good performance.It was demonstrated that AFM fluid imaging can be exploited as a useful tool in the in-situ observation and measurement in micro-interfacial processes of the environmental concern.