|
|
|
| Heterogeneous Fenton degradation of p-nitrophenol by iron complexing carboxyl-modified carbon nanotube |
| 1. Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, Jilin 136000, China; 2. College of Environmental Science and Engineering, Jilin Normal University, Siping, Jilin 136000, China; 3. College of Information and Technology, Jilin Normal University, Siping, Jilin 136000, China |
|
|
|
|
Abstract To solve the problem of catalyst deactivation by iron ion complexing with the intermediates from Fenton degradation of phenol compounds, the synthetic method of heterogeneous Fenton catalysts with carboxyl complexation was proposed. The structure and the composition of the iron complexing carboxyl-modified carbon nanotube (CNT-COOFe) were characterized by FTIR, XRD and XPS. The CNT-COOFe was deposited on PTFE filter membrane by vacuum suction method to form catalyst layer. The catalytic performance and regeneration were studied in the heterogeneous Fenton system with p-nitrophenol as model pollutant. The results show that the conversion rate of H2O2 is decreased with the extension of reaction time, and the conversion rates at 2 and 30 min are respective 90.23% and 19.54% when 30 mg·L-1 H2O2 with initial pH value of 5.0 is flowed through the membrane layer of 30 mg CNT-COOFe. The existence of hydroxyl free radicals is confirmed as the main reactive radical by capturing experiment with coumarin.The p-nitrophenol with initial concentration of 10 mg·L-1 is degraded rapidly in the heterogeneous Fenton system, and the removal rates of p-nitrophenol and TOC at 2 min are near 100% and 80%, respectively. The catalytic activity of CNT-COOFe can be regenerated by electroreduction at the cathode potential of -1.0 V vs. Ag/AgCl, and the TOC removal rate of the system can still reach about 80%.
|
|
Received: 19 April 2019
|
|
|
|
| ［1］ |
DOS SANTOS A , VIANTE M F, POCHAPSKI D J, et al. Enhanced removal of p-nitrophenol from aqueous media by montmorillonite clay modified with a cationic surfactant\[J\]. Journal of Hazardous Materials, 2018, 355: 136-144.
|
| ［2］ |
宋瀚文,王东红,徐雄,等.我国24个典型饮用水源地中14种酚类化合物浓度分布特征\[J\].环境科学学报, 2014, 34(2): 355-362.
|
|
SONG H W, WANG D H, XU X, et al. Occurrence of 14 phenols in 24 typical drinking water sources of China\[J\]. Acta Scientiae Circumstantiae, 2014, 34(2): 355-362. (in Chinese)
|
| ［3］ |
孙影,李美璇,彭举威,等.用Fenton技术去除水中盐酸左氧氟沙星\[J\]. 吉林大学学报(理学版), 2018, 56(2): 446-451.
|
|
SUN Y, LI M X, PENG J W, et al. Removal of levofloxacin hydrochloride in water by Fenton technique\[J\]. Journal of Jilin University (Science Edition), 2018, 56(2): 446-451. (in Chinese)
|
| ［4］ |
谈超群,董雨婕,钟毅杰,等.新型氯离子活化过氧单硫酸盐的非自由基系统去除水中扑热息痛的研究\[J\]. 四川大学学报(自然科学版), 2018, 55(4): 819-826.
|
|
TAN C Q, DONG Y J, ZHONG Y J, et al. Acetaminophen degradation with non-radical based reactive oxidants generated by chloride activated peroxymonosulfate system\[J\]. Journal of Sichuan University (Natural Science Edition), 2018, 55(4): 819-826. (in Chinese)
|
| ［5］ |
VILARDI G, SEBASTIANI D, MILIZIANO S, et al. Heterogeneous nZVI-induced Fenton oxidation process to enhance biodegradability of excavation by-products\[J\]. Chemical Engineering Journal, 2018, 335: 309-320.
|
| ［6］ |
KANTAR C, ORAL O, URKEN O, et al. Oxidative degradation of chlorophenolic compounds with pyrite-Fenton process\[J\]. Environmental Pollution, 2019, 247: 349-361.
|
| ［7］ |
MOUSSET E, FRUNZO L, ESPOSITO G, et al. A complete phenol oxidation pathway obtained during electro-Fenton treatment and validated by a kinetic model study\[J\]. Applied Catalysis B: Environmental, 2016, 180: 189-198.
|
| ［8］ |
HUANG L Z, ZHU M T, LIU Z Z, et al. Single sheet iron oxide: an efficient heterogeneous electro-Fenton ca-talyst at neutral pH\[J\]. Journal of Hazardous Materials, 2019, 364: 39-47.
|
| ［9］ |
PANDA D, MANICKAM S. Heterogeneous sono-Fenton treatment of decabromodiphenyl ether (BDE-209): debromination mechanism and transformation pathways\[J\]. Separation and Purification Technology, 2019, 209: 914-920.
|
| ［10］ |
田惠博,张强,闫岩,等.Ag/石墨烯复合涂层的制备及抗菌性能\[J\]. 吉林大学学报(理学版), 2020, 58(2): 403-409.
|
|
TIAN H B, ZHANG Q, YAN Y, et al. Preparation and antibacterial properties of Ag/graphene composite coa-ting\[J\]. Journal of Jilin University (Science Edition), 2020, 58(2): 403-409. (in Chinese)
|
| ［11］ |
PISTONE A, FERLAZZO A, LANZA M, et al. Morphological modification of MWCNT functionalized with HNO3/H2SO4 mixtures\[J\]. Journal of Nanoscience and Nanotechnology, 2012, 12(6): 5054-5060.
|
| ［12］ |
DIVYAPRIYA G, NAMBI I, SENTHILNATHAN J. Ferrocene functionalized graphene based electrode for the electro-Fenton oxidation of ciprofloxacin\[J\]. Che-mosphere, 2018, 209: 113-123.
|
|
|
|
2020, Vol. 41 
