Removal of odorant 2-MIB by water treatment process
2-Methylisoborneol(2-MIB)is a key compound responsible for the undesirable odor in water,primarily originating from the synthesis and release of algae and other microorganisms under natural conditions.Consequently,2-MIB exists in both extracellular and intracellular forms,and can also interact with dissolved organic matter(DOM)in water,forming both free and bound states due to intermolecular interactions.These varying forms of occurrence significantly influence the removal efficiency in water treatment processes.In the pretreatment stage(such as pre-oxida-tion and activated carbon adsorption),part of the extracellular 2-MIB can be removed,while pre-oxidation may lead to the rupture of algal cells,thereby releasing intracellular 2-MIB.Conventional treatment(coagulation,sedimentation and filtration)processes are effective at removing algal cells and intracellular 2-MIB,but have limited effectiveness in removing extracellular 2-MIB.Advanced treatment technologies,such as nanofiltration and advanced oxidation,offer more efficient inter-ception and degradation of 2-MIB,with nanofiltration particularly effective in removing bound 2-MIB due to the larger molecular size after binding with DOM.However,the investment and opera-tional costs are relatively high.Therefore,in practical water treatment processes,it is crucial to select appropriate combination treatment technologies based on source water quality and the specific forms of 2-MIB present in order to optimize the removal efficiency of 2-MIB throughout the treat-ment stages.
Drinking water treatment plant2-MethylisoborneolDissolved organic matter
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