التفاصيل البيبلوغرافية
| العنوان: |
OXIDATION OF SULFAMERAZINE WITH Fe2+/PERSULFATE SYSTEM: EFFECTS OF INORGANIC ANIONS AND DEGRADATION MECHANISM BASED ON INDEPENDENT REACTION. |
| المؤلفون: |
Huiyu Ren, Hongmin Zhang, Qingzhu Jia, Qiang Wang |
| المصدر: |
Fresenius Environmental Bulletin; 2020, Vol. 29 Issue 2, p1096-1103, 8p |
| مستخلص: |
The heavy use of sulfonamide antibiotics leads to significant detection in water, and the existence of "fake persistence" seriously affects the ecological health. In this work, the Fe2+/ persulfate (PS) catalytic oxidation approach was used to remove sulfamerazine (SMI). Results showed that SMI could be effectively removed in the Fe24/PS system and the removal rate of over 90% was achieved. The pH value in Fe27PS system would rapidly decrease to 3 with the beginning of reaction in the initial pH range of 3.0-9.0. The inorganic anions HCO-3 and NO-3 in water had significant inhibitory effect on the SMI degradation process, while NO-2 had obvious promotion effect. The free radical validation results suggested that both SO-4 and HO played important roles in the oxidation process. Based on the chemical stoichiometric matrix method, the independent reaction formulas for the SMI degradation process were developed and a possible degradation path of SMI was also proposed. In addition, both the theoretical calculation and experimental results indicated that the degradation process of SMI was consistent with the first-order kinetics. [ABSTRACT FROM AUTHOR] |
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