SUSTAINABLE ACTIVATION OF PERACETIC ACID WITH MoS<sub>2</sub> FOR DEGRADATION OF ACIDIC ORANGE 7

ZHANG Jianqiao; WANG Lei; LIU Wenjie; YANG Lei; JIN Wenbiao

doi:10.13205/j.hjgc.202402016

Volume 42 Issue 2

Feb. 2024

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ZHANG Jianqiao, WANG Lei, LIU Wenjie, YANG Lei, JIN Wenbiao. SUSTAINABLE ACTIVATION OF PERACETIC ACID WITH MoS2 FOR DEGRADATION OF ACIDIC ORANGE 7[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(2): 135-143. doi: 10.13205/j.hjgc.202402016

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ZHANG Jianqiao, WANG Lei, LIU Wenjie, YANG Lei, JIN Wenbiao. SUSTAINABLE ACTIVATION OF PERACETIC ACID WITH MoS₂ FOR DEGRADATION OF ACIDIC ORANGE 7[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(2): 135-143. doi: 10.13205/j.hjgc.202402016

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SUSTAINABLE ACTIVATION OF PERACETIC ACID WITH MoS₂ FOR DEGRADATION OF ACIDIC ORANGE 7

doi: 10.13205/j.hjgc.202402016

1. Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China;
2. Luohu District Urban Management and Comprehensive Law Enforcement Bureau, Shenzhen 518003, China;
3. State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China

Received Date: 2023-02-01
Available Online: 2024-04-28

Abstract

Abstract

Acidic orange 7(AO7) is a typical anionic azo dye, and has attracted widespread attention for its potential hazards to the environment and human health. In this study, molybdenum disulfide(MoS₂) was used as an activator of peroxyacetic acid(PAA) for the degradation of AO7. The results indicated that the degradation efficiency of AO7 in the MoS₂/PAA system was much higher than that in the MoS₂/H₂O₂ system and MoS₂/PI system. The degradation efficiency of AO7 reached 84.2% under the condition of ρ(MoS₂)₀=0.4 g/L, c(PAA)₀=0.4 mmol/L, and initial pH=3.0. In addition, the MoS₂/H₂O₂ system can efficiently degrade various pollutants such as MO, ACE, DCF, SMX, and TC. EPR and quenching experiments result indicated that ·OH, R-O·, and ¹O₂ generated by the MoS₂/PAA system were the main reactive oxygen species for AO7 degradation. UV full wavelength scanning revealed that the azo bonds and aromatic fragments(naphthalene and benzene rings) of AO7 were rapidly disrupted under the attack of active free radicals. Further investigation was conducted on the effects of initial pH, MoS₂ dosage, PAA concentration, coexisting water matrix on AO7 degradation. In the co-existing water matrix experiment, Cl^-, SO₄^2- and HCO^-₃ did not affect the removal of AO7, while humic acid(HA) inhibited it. In natural water bodies, the MoS₂/PAA system still exhibits strong oxidation performance(up to 60%) towards AO7. Overall, this study provides new knowledge on the degradation of organic pollutants within the MoS₂/PAA system.
- MoS₂,
- peracetic acid,
- Fenton-like,
- acidic orange 7

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References(28)

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