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以二甲基异茨醇(2-MIB)为研究对象,系统考察了臭氧-颗粒活性炭(O_3-GAC)联用工艺对水源水体中嗅味物质的去除性能。结果表明,混凝、沉淀和过滤等传统水质净化单元对2-MIB的去除能力有限,累积去除率在25%左右;而相同进水2-MIB含量条件下,O_3氧化和GAC吸附对2-MIB的去除率分别为50%和80%。随着水温的增加,GAC的吸附容量略有降低。GAC对2-MIB的吸附过程是自发的放热反应(ΔG~<0,ΔH~<0),符合准2级反应动力学和Freundlich等温吸附特征。
With 2-MIB as the research object, the removal performance of ozone-granular activated carbon (O_3-GAC) combined with the process of removing odor substances from water bodies was systematically investigated. The results showed that the removal efficiency of 2-MIB by traditional water purification units such as coagulation, sedimentation and filtration was limited, and the cumulative removal rate was about 25%. Under the same influent 2-MIB content, the oxidation of O_3 and the adsorption of 2- MIB removal rates were 50% and 80% respectively. As the water temperature increases, the adsorption capacity of GAC decreases slightly. The adsorption process of 2-MIB by GAC is a spontaneous exothermic reaction (ΔG ~ <0, ΔH ~ <0), which accords with quasi-second order reaction kinetics and Freundlich adsorption isotherm.