ACTIVATED CARBON HETEROGENEOUS ACTIVATION OF DIFFERENT PERSULFATES TO DEGRADATION AZO DYE ACID ORANGE Ⅱ

CHEN Wei-gang; WU Hai-xia; FAN Jia-wei

doi:10.13205/j.hjgc.202008019

Volume 38 Issue 8

Nov. 2020

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CHEN Wei-gang, WU Hai-xia, FAN Jia-wei. ACTIVATED CARBON HETEROGENEOUS ACTIVATION OF DIFFERENT PERSULFATES TO DEGRADATION AZO DYE ACID ORANGE Ⅱ[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 113-118,57. doi: 10.13205/j.hjgc.202008019

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CHEN Wei-gang, WU Hai-xia, FAN Jia-wei. ACTIVATED CARBON HETEROGENEOUS ACTIVATION OF DIFFERENT PERSULFATES TO DEGRADATION AZO DYE ACID ORANGE Ⅱ[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(8): 113-118,57. doi: 10.13205/j.hjgc.202008019

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ACTIVATED CARBON HETEROGENEOUS ACTIVATION OF DIFFERENT PERSULFATES TO DEGRADATION AZO DYE ACID ORANGE Ⅱ

doi: 10.13205/j.hjgc.202008019

College of Urban Construction, Nanjing Tech University, Nanjing 211816, China

Received Date: 2019-05-14

Abstract

Abstract

In this paper, the degradation effect of heterogeneous activating peroxydisulfate and peroxymonosulfate by GAC on the azo dye AO Ⅱ in water were studied. The effects of persulfate dosage, activated carbon dosage, solution pH and inorganic anion on the degradation rate of AO Ⅱ were investigated. The reasons for the difference in the degradation of dyes by different persulfates were studied. When the azo dye concentration was 20 mg/L and the molar ratio of persulfate to acid orange Ⅱ was 200∶1, the degradation rate of dyes was the highest. Degradation effect got better when adding peroxydisulfate, and the solution was in acidic condition, and the increase of granular activated carbon was conductive to the removal of dyes; the addition of inorganic anions had an inhibitory effect on degradation of AO Ⅱ; free radicals generated on the surface of activated carbon played an important role in the degradation of dye.
- activated carbon,
- heterogeneous activation,
- sulfate radical,
- azo dye,
- acidic orange Ⅱ

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