Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Rong Wang,Yanyang Chu,Hongrui Zhang
Although alpha-ferric oxide (α-Fe 2 O 3 ) has been widely used in photocatalysis, Fenton-like and photo-Fenton systems for organics degradation, its catalytic activity is still necessary to be evaluated scrupulously in full consideration of organics adsorption and homogeneous Fenton oxidation. In this work, nanoscale α-Fe 2 O 3 was prepared by the direct calcination of FeCl 3 · 6 H 2 O, and its true catalytic activity in photocatalysis, Fenton-like and photo-Fenton systems was evaluated by the degradation of rhodamine B (RhB) and tetracycline (TC). It was found that the activity of α-Fe 2 O 3 in Fenton-like and photo-Fenton systems at pH 3.0 was higher than that at pH 7.0 and pH 9.0. Compared with photocatalysis and Fenton-like systems, photo-Fenton system exhibited greater organics degradation performance. In the photo-Fenton system, photocatalytic reactions can not only degrade organics directly and accelerate the redox cycle of Fe(II)/Fe(III), but also supply more active sites to promote H 2 O 2 activation. Photocatalytic reactions caused more Fe leached, whereas dissolved Fe could enhance degradation performance significantly even at a very low concentration (0.15 mg L –1 ). An interesting result was that the increase of solution pH enhanced H 2 O 2 decomposition in the photo-Fenton system, but the degradation performance decreased obviously. Overall, α-Fe 2 O 3 does not have high activity in photocatalysis and Fenton-like systems, and its heterogenous Fenton-like activity may be overestimated in many references. α-Fe 2 O 3 is more suitable to be applied in photo-Fenton system to remove organic pollutants from acidic wastewaters considering H 2 O 2 utilization efficiency.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Wei Miao,Ying Liu,Xiaoyan Chen,Yixin Zhao,Shun Mao
In recent years, design high catalytic graphitic carbon nitride (g–C 3 N 4 )–based catalysts has drawn broad attention in environmental remediation. In this work, a series of iron-doped g-C 3 N 4 compounds were synthesized through a simple bottom-up strategy. By controlled pyrolysis , iron-doped g-C 3 N 4 materials split from bulk structure into multi-layer structure with uniformly dispersed mesopores. The catalytic activities of layered iron-doped g-C 3 N 4 in Fenton-like and photo-Fenton-like processes were investigated. Due to the doped iron, unique layered structure, and mesopore feature, the catalysts present greatly enhanced performance in heterogeneous Fenton-like reactions. Moreover, the degradation parameters calculated by the pseudo-first-order kinetic model fitted well with the specific surface area of the catalyst, indicating that the catalytic activities rely heavily on the specific surface area of layered and porous g-C 3 N 4 . This study presents a facile and generic method to regulate C 3 N 4 morphology and structure for enhanced catalytic activity in Fenton-like reactions.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Sainan Sun,Guanghua Huang,Jiawei Tang,Fazhi Xie,Xiao Wang,Qiang Guo,Hongshuai Kan,Meng Qiao,Yanpeng Liu,Yi Liu,Zixiao Zhu,Xu Zhao,Ran Mao,Bo Yang
Considering the potential eutrophication risk of phosphonate and scarcity of phosphorus resources, the oxidation of organically-bound phosphorus to orthophosphate (ortho-P) is an important prerequisite for high-value phosphorus recovery. This study investigated efficiency and mechanism of different categories of phosphonates oxidation to ortho-P by classical Fenton and practical electrochlorination Fenton-like processes. The target phosphonates included two categories: nitrogen-free phosphonates (NF-PPs), i.e. 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC) and 1-Hydroxyethane-1,1-diphosphonic acid (HEDP), and aminophosphonates (A-PPs), i.e. Nitrilotris(methylene phosphonic acid) (NTMP) and diethylenetriamine penta(methylene phosphonic acid) (DTPMP). The results showed that ortho-P conversion for both NF-PPs and A-PPs by classical Fenton process were below 35 %, even though the content of Fe(II) and H 2 O 2 were high enough to neglect the influence of phosphonate-Fe(II) complexation on Fenton reaction initiation. While electrochlorination Fenton-like process greatly enhanced ortho-P conversion of HEDP, NTMP and DTPMP. Potent oxidation relied on generation of HClO, Fe IV O 2+ , and 1 O 2 rather than HO•. In particular, PBTC failed to decompose effectively by electrochlorination Fenton-like process possibly due to chlorine resistance. The non-N-element group was inferred to serve as a decisive role in phosphonates decomposition. This study provided the first systematic description of oxidation rules and mechanism characteristics of diverse phosphonates under classical Fenton and electrochlorination Fenton-like treatment.
研究领域:
环境科学
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水处理工程
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DOI
PubMed
高影响因子
Environmental Science-Nano
·
2021
·Vol. 8
·期 12
·3629-3642
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IF 8.131
Jiaojiao Wang,Xiaoqing Jia,Denghui Shang,Liangbo Xie,Yi Li,He Zhang,Sihui Zhan,Wenping Hu
The long-term overuse of ciprofloxacin has resulted in its ubiquitous release into aquatic environments, seriously threatening public and ecological security. Herein, a photo-assisted-electro-Fenton-like (PAEF-like) system using p–n type Cu2O/Bi2MoO6 (CBM) as photoelectric catalyst was designed for efficient ciprofloxacin removal. The realization of photo-assisted function benefited from the perfectly constructed p–n heterojunction, which effectively regulated the carrier migration behaviors and drove the directional delivery of photoinduced electrons with flexible reactivity. Furthermore, photoinduced electrons directly or indirectly promoted the activation of H2O2 to enhance the ability of the PAEF-like synergy system to form ˙OH, improving the photoelectric catalytic activity. As dominant active species, ˙OH cooperated with h+ and ˙O2−, leading to the efficient elimination of ciprofloxacin. Finally, the degradation rate within 120 min reached almost 100%, and the corresponding kinetic constant was 208 and 1.5 times that of the photocatalytic and EF-like system, separately. Importantly, CBM-25% still maintained superior removal effect after four consecutive runs, revealing the high stability and practical feasibility of the PAEF-like system.
研究领域:
环境科学
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材料科学
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化学工程
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催化
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2018
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IF 3.525
Shafaq Sahar,Akif Zeb,Yanan Liu,Naseeb Ullah,Anwu Xu
We prepared the Fe 3 O 4 /g-C 3 N 4 nanoparticles (NPs) through a simple electrostatic self-assembly method with a 3:97 weight ratio to investigate their Fenton , photo-Fenton and oxidative functionalities besides photocatalytic functionality. We observed an improvement of the Fenton and photo-Fenton activities of the Fe 3 O 4 /g-C 3 N 4 nanocomposites . This improvement was attributed to efficient charge transfer between Fe 3 O 4 and g-C 3 N 4 at the heterojunctions, inhibition of electron-hole recombination, a high surface area, and stabilization of Fe 3 O 4 against leaching by the hydrophobic g-C 3 N 4 . The obtained NPs showed a higher degradation potential for rhodamine B (RhB) dye than those of Fe 3 O 4 and g-C 3 N 4 . As compared to photocatalysis , the efficiency of RhB degradation in the Fenton and photo-Fenton reactions was increased by 20% and 90%, respectively. Additionally, the horseradish peroxidase (HRP) activity of the prepared nanomaterials was studied with 3,3,5,5-tetramethylbenzidinedihydrochloride (TMB) as a substrate. Dopamine oxidation was also examined. Results indicate that Fe 3 O 4 /g–C 3 N 4 nanocomposites offers more efficient degradation of RhB dye in a photo-Fenton system compared with regular photocatalytic degradation, which requires a long time. Our study also confirmed that Fe 3 O 4 /g-C 3 N 4 nanocomposites can be used as a potential material for mimicking HRP owing to its high affinity for TMB. These findings suggest good potential for applications in biosensing and as a catalyst in oxidation reactions.
研究领域:
环境科学
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材料科学
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生物化学
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DOI
高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Wei Wang,Yanchun Li,Yawei Li,Minghua Zhou,Omotayo A. Arotiba
A novel superhydrophobic gas diffusion electrode based on carbon black (CB)- polytetrafluoroethylene (PTFE) modified graphite felt cathode was prepared to increase oxygen mass transfer efficiency and produce hydrogen peroxide at the gas-liquid-solid three-phase interface without aeration. The gas diffusion electrode system was further tested for the degradation of sulfamethazine (SMT) by electro-Fenton (EF) and photoelectro-Fenton (PEF). In the EF process, SMT was removed effectively, but the mineralization degree was not high due to the generation of organic acids which were difficult to be further degraded. While in the PEF process, organic contaminant can be destroyed by the combined action of Fe 2+ /H 2 O 2 , UV/H 2 O 2 and UV radiation, and more efficient mineralization (>83.5%) at low current (50 mA) was attained, which might be attributed to the high H 2 O 2 utilization (70–90%), rapid regeneration of Fe 2+ and photolysis of intermediates. In addition, it was verified that the PEF system had a good adaptability to pH and pollutant concentration . Compared with aeration system, the use of this active gas diffusion cathode in electrochemical advanced oxidation processes significantly reduced energy consumption.
研究领域:
环境科学
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化学工程
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污水处理
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DOI
PubMed
高影响因子
Frontiers in Environmental Science
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2022
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IF 5.411
Ma Yameng,Huang Xiao,Han Qi,Yu Jianghua,Yu Fengjiao,Zhu Jia
The strong stability of Cu–ethylenediaminetetraacetic acid (Cu–EDTA) results in the low decomplexation efficiency by the traditional Fenton process. For breaking this limitation, a three-dimensional electro-Fenton (3D-EF) system was constructed to study the decomplexation of Cu–EDTA at different pH, and the effects of Fe2+ concentration, particle electrode dosage, current density, and coexisting ions on decomplexation performance were investigated. The results showed that 3D-EF exhibited high pollutant removal efficiency in a wide pH range compared with the traditional electro-Fenton process. The optimal conditions for the removal of Cu–EDTA were as follows: the pH was 7, Fe2+ was 1 mmol L−1, granular activated carbon was 2 g L−1, and current density was 10 mA cm−2, and the optimum Cu–EDTA removal efficiency reached 90.95%. In addition, the presence of Cl− slightly improved the decomplexation efficiency, whereas NO3− and HPO42− inhibited the removal of Cu–EDTA. The kinetics of Cu–EDTA decomplexation in all experimental groups followed the first-order kinetic equation.
研究领域:
环境工程
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化学工程
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水处理
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2020
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IF 6.551
Yifan Huang,Minling Gao,Yingxuan Deng,Zulqarnain Haider Khan,Xuewei Liu,Zhengguo Song,Weiwen Qiu
The by-product of the traditional Fenton reaction , colloidal arsenic-‑iron oxide, is migratable and may cause secondary environmental pollution . This paper reported a new strategy involving oxidizing and immobilizing inorganic arsenic using the Fenton reaction, and avoiding the risk of secondary contamination. Lab synthesized ferrihydrite-loaded biochar (FhBC) was developed for oxidizing and binding As(III) and As(V) in aqueous solution. Batch experiments and a series of spectrum analysis (e.g., X-ray photoelectron spectroscopy [XPS], electron paramagnetic resonance [EPR], and Fourier transform infrared spectroscopy [FTIR]) were conducted to study the oxidizing or adsorption capacity and mechanism. The maximum adsorption capacity of FhBC for As(III) and As(V) is 1.315 and 1.325 mmol/g, respectively. In addition, FhBC has an efficient oxidizing capacity within a wide pH range, which is because biochar promotes the Fenton reaction by acting as an electron donator, electron shuttler, or by providing persistent free radicals. Moreover, the adsorption mechanism was studied by FTIR spectroscopy, XPS, and X-ray diffraction (XRD). The formation of internal spherical complexes and iron oxides with a higher degree of crystallization was observed, which indicate that the products of adsorption are stable and robust in a complex environment and can exist in a highly crystallized form after adsorbing arsenic ions. Therefore, the use of FhBC as an adsorbent for arsenic represents a new strategy of using the Fenton reaction while reducing secondary contamination. These results may contribute to further mechanistic studies or extensive practical applications of FhBC.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Zhenzhong Hu,Hongwei Gao,Guoqing Yang,Jingxia Ning,Honghong Lyu,Sheng-qi Guo,Mengmeng Zhen,Jiawei Zhang,Boxiong Shen
Fenton technology is effective in removing high-risk roxarsone (ROX) from the environment. In this study, MoS 2 -modified magnetic iron oxides were successfully synthesized to serve as catalysts for the photo-Fenton system to efficiently degrade ROX. Under light illumination, these catalysts demonstrated strong arsenic adsorption characteristics and photocatalytic activity. The catalyst 6Mo-Fe achieved a 96.15% removal of 20 mg/L ROX and an 88.95% removal of total arsenic within 120 minutes. The study evaluated the effects of catalyst dosage, H 2 O 2 dosage, initial pH, and common anions on the degradation efficiency. The integration of MoS 2 significantly improved the forbidden band width, light absorption capacity, and electrochemical impedance of iron oxides, facilitating the separation and transfer of charge carriers. MoS 2 provided abundant Mo 4+ reduction sites for Fe 3+ , which, in conjunction with the photocatalytic reaction, promoted the cyclic conversion between Fe 3+ and Fe 2+ , thereby markedly increasing the reaction rate. This study presents an innovative approach using MoS 2 -modified iron oxides for the sustainable and eco-friendly degradation of organoarsenic compounds.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Yanbiao Shi,Xiaobing Wang,Xiufan Liu,Cancan Ling,Wenjuan Shen,Lizhi Zhang
We demonstrate that visible light irradiation can promote Fe 3 S 4 Fenton oxidation of atrazine. The visible light irradiation could increase the atrazine Fenton degradation rate by 4.9 times. The enhanced atrazine degradation activity under visible light was attributed to the higher surficial Fe(II)/Fe(III) ratio of Fe 3 S 4 and the efficient surface iron redox cycle triggered by visible light. Experimental results revealed that the operando formation of FeOOH on the Fe 3 S 4 surface blocked the iron redox cycle and inhibited the H 2 O 2 decomposition, accounting for the largely decreased Fenton activity of Fe 3 S 4 in dark, while these problems were successfully solved by the introduction of visible light irradiation, which excite Fe 3 S 4 to produce abundant photo-generated electrons and O 2 − for efficient regeneration of active Fe(II) species of Fe 3 S 4 and in-situ formed FeOOH.
研究领域:
环境科学
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化学
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DOI
高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 19
·7973-7977
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IF 1.938
Yingfeng Qin,Liangliang Zhang,Gaojie Ye,Shulin Zhao
A homogeneous label-free colorimetric sensing strategy for bleomycin (BLM) assay was developed on the basis of BLM enhanced Fe(II)–H2O2–ABTS reaction. Fe(II) exhibits a catalytic effect on H2O2-mediated oxidation of ABTS by Fenton chemistry. BLM·Fe(II) complex possessed a significantly higher catalytic ability than Fe(II) probably because of the further formation of more active “activated oxo-iron-bleomycin complex”. The present method was convenient without any complicated chemical synthesis, modification, or tedious experimental procedures. Analysis results can be seen with the naked eye and monitored by UV-vis spectra. The peak absorbance exhibits a linear relationship with BLM concentrations from 25 nM to 1 μM, and a detection limit of 16 nM can be achieved. The designed colorimetric strategy may provide a promising alternative for BLM detection in clinical samples.
研究领域:
分析化学
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生物医学
·
临床检验
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
·
IF 13.6
Mingwei Wang,Ye Sun,Qilin Yu,Zhiqiang Zhao,Yang Li,Yaobin Zhang
Fenton sludge generated in the flocculation stage of the Fenton oxidation process contains significant amounts of ferric iron and organic pollutants , which require proper treatment. Previous studies have demonstrated that adding Fenton sludge to an anaerobic digester can decompose some of the organic pollutants in the Fenton sludge to lower its environmental risk, but iron gradually accumulates in the reactor, which weakens the sustainability of the method. In this study, Fenton sludge was introduced into a hydrolytic acidification reactor with a weak acid environment to relieve the iron accumulation as well as improve the degradation of organic matter. The results showed that the added Fenton sludge acted as an extracellular electron acceptor to induce dissimilatory iron reduction, which increased chemical oxygen demand (COD) removal and acidification efficiency by 16.1% and 19.8%, respectively, compared to the group without Fenton sludge. Along with the operation, more than 90% of the Fe(III) in Fenton sludge was reduced to Fe(II), and part of them was released to the effluent. Moreover, the Fe(II) in the effluent could be used as flocculants and Fenton reagents to further decrease the effluent COD by 29.8% and 44.5%, respectively. It provided a sustainable strategy to reuse Fenton sludge to enhance organic degradation based on the iron cycle.
研究领域:
环境工程
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废物管理
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水处理
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生物技术
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）