Investigation of the effects of humic acid and
H 2 O 2 on the photocatalytic
degradation of atrazine assisted by microwave

doi:10.1007/s11783-010-0238-6

Front.Environ.Sci.Eng.

2010, Vol. 4

Issue (3) : 321-328 https://doi.org/10.1007/s11783-010-0238-6

Research articles

Investigation of the effects of humic acid and H 2 O 2 on the photocatalytic degradation of atrazine assisted by microwave

Chao QIN¹,Shaogui YANG¹,Cheng SUN¹,Jia ZHOU¹,Manjun ZHAN²,Rongjun WANG³,Huanxing CAI³,

1.State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China; 2.Nanjing Research Institude of Environmental Protection, Nanjing 210013, China; 3.Changzhou Environmental Monitoring Center, Changzhou 210093, China;

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Abstract A solution of atrazine in a TiO₂ suspension, an endocrine disruptor in natural water, was tentatively treated by microwave-assisted photocatalytic technique. The effects of mannitol, oxygen, humic acid, and hydrogen dioxide on the photodegradation rate were explored. The results could be deduced as follows: the photocatalytic degradation of atrazine fits the pseudo-first-order kinetic well with k = 0.0328 s^−1, and ·OH was identified as the dominant reactant. Photodegradation of atrazine was hindered in the presence of humic acid, and the retardation effect increased as the concentration of humic acid increased. H₂O₂ displayed a significant negative influence on atrazine photocatalysis efficiency. Based on intermediates identified with gas chromatography-mass spectrometry (GC-MS) and Liquid chromatography-mass spectrometry (LC-MS/MS) techniques, the main degradation routes of atrazine are proposed.

Keywords atrazine retardation effect photocatalysis TiO2

Issue Date: 05 September 2010

Cite this article:

Chao QIN,Shaogui YANG,Cheng SUN, et al. Investigation of the effects of humic acid and H 2 O 2 on the photocatalytic degradation of atrazine assisted by microwave[J]. Front.Environ.Sci.Eng., 2010, 4(3): 321-328.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-010-0238-6
https://academic.hep.com.cn/fese/EN/Y2010/V4/I3/321

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