| Sulfonamides antibiotics were fluequently detected in water plants because of its high production in our country. Due to its stable structure, antibiotics it was hard to remove by water treatment process in ordinary water plants. If existed in our drinking water, it could lead to drug-fast performance, then affect clinical treatment, and even cause allergy symptoms. It could affect the kidney badly and lead to the imbalance of a person’s urine and blood system after drinking water within that kind of antibiotics for long time especially accumulating to a certain degree. Therefore,the research on how to remove that kind of antibiotics effectively is always the focus hat researchers domestic and overseas are highly concentrate on.Guided by water pollution and purifying theory, this paper investigates the removal rate of three new type of advanced oxidation technologies: UV/H2O2, UV/PS and Co Fe2O4 activating PMS, to two typical sulfa antibiotics: Sulfapyridine( SPY), sulfamerazine(SM1) on the basis of experimental analysis. Meanwhile this paple makes the use of dynamical models of three technologies and the influence to experimantal result by different factors.Research shows that there is almost no removal effect on sulfapyridine and sulfamerazine from UV alone. However, it could improve the removal rate when adding oxidizers H2O2 and PS, and degradation process conformed first order kinetics model. Within a certain concentration of oxidizers H2O2 and PS, removal rate of target pollutant would be improved with the oxidant concentration increasing, decreased with target pollutant’s initial concentration increasing. the best PH values are all acidity when UV/H2O2 degradate sulfapyridine and sulfamerazine, as for UV/PS, removal rate of degradating Sulfapyridine comes to the top when PH value is 11, and the same as degradating sulfamerazine when PH value is 3. Cl- has inhibiting effect on both UV/H2O2 and UV/PS system, but appropriate Na HCO3 has acceleration effect on it. A few humic acids could improve interaction of UV/H2O2 system, but not UV/PS. After Increasing TBA and ETOH quenching agent in the system, it reveals that in UV/H2O2 system ?OH plays a vital role on oxidation, and it is ·SO4-in UV/H2O2 system.Otherwise, we use Co Fe2O4/PMS to degradate sulfapyridine and sulfamerazine, and results show that its degradation process conformed first order kinetics model. Calculated activation energy of two pollutants via Arrhenius equation, the result is 66.51KJ/mol and 53.04KJ/mol, which were affected greatly by temperature. If initial concentration of target pollutant goes upon, the reaction rate will go down. Relationship between kobs value of two target pollutant and PH value are all conformed order kinetics model, and both reach the maximun value when PH value is 9. Low concentration of HCO3- has inhibiting effect on degradating sulfamerazine, and with its concentration increasing, the acceleration increased. Cl- has inhibiting effect on degradating both sulfapyridine and sulfamerazine. A few humic acids could promote degradating sulfapyridine. After adding TBA and ETOH quenching agent in the system, it shows that ·SO42- play a vital role on oxidation in the system; Increasing dosages of oxidants and catalyzers could improve degree of mineralization of system appropriately. Catalytic performance of materials would decrease with recovery times accumulated. |
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