In this pilot study,the necessity and feasibility of the prepositive peroxone process for the removal of 2-methylisobornyl(2-MIB),a typical odorous chemicals,was studied using raw water as feed water in a site in Ningbo,China.P-chlorobenzoic acid was used as a replacement compound(·OH probe)for 2-MIB.The operating parameters included O3 dosage,H2O2/O3 dos-age ratio,pH and reaction time.The results showed that the catalytic effect of H2O2 significantly increased the reaction rate and removal rate compared with the ozone-only dosing condition.Under the condition of high concentration of 2-MIB(＞50 ng/L),in order to meet the requirement of out-let(＜10 ng/L),the peroxone process instead of ozone-only oxidation should be adopted,and the appropriate ratio of H2O2/O3 dosage should be around 20％.At the same time,appropriate in-crease of feed water pH can also optimize the treatment effect,to a certain extent,to reduce the o-zone dosage.In addition,in the case of alkalinity and NOM is not high and the concentration of 2-MIB in the feed water is low,only through the ozone oxidation may also achieve requirements.Through the optimization of the operating parameters,the O3/H2O2 process can remove the odor-ous chemicals stably and efficiently,and the 6 min reaction time can satisfy the removal require-ment of 2-MIB.
Peroxone process2-methylisobornylOdorous chemicalsDrinking water treat-mentOperating parameters
NETL
NSTL
万方数据
