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为了初步建立南水北调中线水源发生土臭素污染时的应对机制,通过向南水北调中线引江水中配入土臭素标准品,研究了臭氧氧化、粉末活性炭吸附以及二者联用对水中土臭素的去除效果。结果表明,对于500 ng/L左右的土臭素,臭氧氧化和粉末活性炭吸附均具有很好的去除效果。臭氧氧化去除水中土臭素的反应非常迅速,基本可在3 min左右完成,去除效果随着臭氧投加量的增大显著增强;粉末活性炭吸附去除水中土臭素的效果与其自身特性有关,且随着投加量的增大和吸附时间的延长逐渐增强;采用臭氧氧化与粉末活性炭吸附联用可以有效发挥二者的协同作用,在保证土臭素去除效果的同时减少臭氧或粉末活性炭投加量,提高产水水质的安全性。
In order to preliminarily establish a coping mechanism for geosmin pollution in the midline water of the South-to-North Water Diversion Project, the effects of ozone oxidation, powdered activated carbon adsorption and the combination of the two on the removal of geosmin in the water were studied by incorporating the standards of geosmin into the diversion water of the middle route of the South-to-North Water Diversion Project. The results showed that both ozone oxidation and powder activated carbon adsorption had a good removal efficiency for geosmin above 500 ng / L. Ozone oxidation to remove geosmin in water reaction is very rapid, can be completed in about 3 min, the removal effect increases significantly with the increase of ozone dosage; powdered activated carbon adsorption removal of the effect of geosmin on its own characteristics, and with the The increase of dosage and the extension of adsorption time gradually increase; the combination of ozone oxidation and powdered activated carbon adsorption can effectively play the synergistic effect of both, while ensuring the removal of geosmin and reducing the dosage of ozone or powdered activated carbon, Water quality and safety.