A Review of the Sources, Monitoring, Detection, and Removal of Typical Olfactory Substances Geosmin and 2-Methylisoborneol

As the key sensory indicators for drinking water quality evaluation, the odor problems caused by geosmin (GSM) and dimethylisobornyl alcohol (2-MIB) have led to several major water supply crises around the world. In this paper, the theoretical framework of the whole process control of olfactory substances is systematically constructed through innovative research from multiple perspectives, and the main contributions are as follows: a comprehensive analysis of the sources of GSM and 2-MIB; an innovative summary of the monitoring methods of cyanobacteria and elaboration on the ways of controlling cyanobacteria in the water source; a comprehensive combing of the methods of olfactory substance detection technology, mainly the application of the new sensor technology; an in-depth summary of the techniques of olfactory removal; an analysis of the problems of the traditional water treatment technology; an analysis of the development and application of the new sensor technology, analyzing the advantages and disadvantages of traditional water treatment technology and classifying and elaborating on advanced oxidation processes (AOPs); and suggestions for the future research direction of each segment.