Citation: Zhang Heng, Ji Qingqing, Lai Leiduo, Yao Gang, Lai Bo. Degradation of p-nitrophenol (PNP) in aqueous solution by mFe/Cu-air-PS system[J]. Chinese Chemical Letters, ;2019, 30(5): 1129-1132. doi: 10.1016/j.cclet.2019.01.025 shu

Degradation of p-nitrophenol (PNP) in aqueous solution by mFe/Cu-air-PS system

Zhang Heng ^a,b ,
Ji Qingqing ^a,b ,
Lai Leiduo ^a,b ,
Yao Gang ^b,c ,
Lai Bo ^a,b,*,

a.
State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
b.
Sino-German Centre for Water and Health Research, Sichuan University, Chengdu 610065, China
c.
Institute of Environmental Engineering, RWTH Aachen University, Aachen, Germany

laibo@scu.edu.cn

Received Date: 28 December 2018
Revised Date: 16 January 2019
Accepted Date: 23 January 2019
Available Online: 23 May 2019

Figures(3)

In this study, batch experiments were conducted to investigate the performance of microscale Fe/Cu bimetallic particles-air-persulfate system (mFe/Cu-air-PS) for p-nitrophenol (PNP) treatment in aqueous solution. First, the optimal operating parameters (i. e., aeration rate of 1.0 L/min, theoretical Cu mass loading (TMLCu) of 0.110 g Cu/g Fe, mFe/Cu dosage of 15 g/L, PS total dosage of 15 mmol/L, feeding times of PS of 5, initial pH 5.4) were obtained successively by single-factor experiments. Under the optimal conditions, high COD and TOC removal efficiencies (71.0%, 65.8%) were obtained after 60 min treatment. Afterword, compared with control experiments (i. e., mFe/Cu, air, PS, mFe/Cu-air, mFe/Cu-PS, air-PS and mFe-air-PS), mFe/Cu-air-PS system exerted superior performance for pollutants removal due to the synergistic effect between mFe/Cu, air and PS. In addition, the results of control experiments and radical quenching experiments indicate this reinforcement by feeding of PS was greater than by aeration in mFe/ Cu-air-PS system. Furthermore, the degradation intermediates of PNP in mFe/Cu-air-PS process were identified and measured by HPLC. Based on the detected intermediates, the degradation pathways of PNP were proposed comprehensively, which revealed that toxic and refractory PNP in aqueous solution could be decomposed effectively and transformed into lower toxicity intermediates. As a result, mFe/Cu-air-PS system with the performance of oxidation combined reduction can be also a potential technology for the treatment of toxic and refractory PNP contained wastewater.
- p-Nitrophenol (PNP),
- Microscale Fe/Cu bimetallic particles (mFe/Cu),
- Persulfate (PS),
- Air aeration,
- mFe/Cu-air-PS system
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