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Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways CSCD
期刊论文 | 2024 , 18 (3) , 143-159 | 环境科学与工程前沿
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Abstract :

Iron-based catalysts have been widely used to treat refractory organic pollutants in wastewater.In this paper,magnetic Co-γ-Fe2O3 was synthesized by a facile tartaric acid-assisted hydrothermal method,and Co-γ-Fe2O3/MoS2 nanocomposite catalyst was obtained via in situ growth of MoS2 nanosheets on Co-γ-Fe2O3 nanoparticles.The nanocomposite catalysts were used to decompose bisphenol A(BPA)by activating peroxymonosulfate(PMS).It was shown that only 0.15 g/L catalyst and 0.5 mmol/L PMS degraded 10 mg/L of BPA(99.3%within 10 min)in the pH range of 3-9.PMS was activated due to redox cycling among the pairs Co(Ⅲ)/Co(Ⅱ),Fe(Ⅲ)/Fe(Ⅱ),and Mo(Ⅵ)/Mo(Ⅳ).Quenching experiments and electron paramagnetic resonance spectroscopy demonstrated that both radical and non-radical pathways were involved in BPA degradation,in which active radical sulfate radical and non-radical singlet oxygen were the main reactive oxygen species.Ten intermediates were identified by liquid chromatography-coupled mass spectrometry,and three possible BPA degradation pathways were proposed.The toxicity of several degradation intermediates was lower,and Co-γ-Fe2O3/MoS2 exhibited excellent reusability and could be magnetically recovered.

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GB/T 7714 Junge Xu , Dong Wang , Die Hu et al. Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways [J]. | 环境科学与工程前沿 , 2024 , 18 (3) : 143-159 .
MLA Junge Xu et al. "Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways" . | 环境科学与工程前沿 18 . 3 (2024) : 143-159 .
APA Junge Xu , Dong Wang , Die Hu , Ziwei Zhang , Junhong Chen , Yingmu Wang et al. Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways . | 环境科学与工程前沿 , 2024 , 18 (3) , 143-159 .
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Functional of thin-film composite Janus membrane with sacrificial layer for inorganic scaling control in membrane distillation Scopus
期刊论文 | 2024 , 710 | Journal of Membrane Science
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Abstract :

Membrane distillation technology, utilized for treating hypersaline wastewater from seawater desalination, often encounters challenges related to inorganic scaling, adversely affecting membrane performance. Herein, we introduce a innovative approach employing a sacrificial layer on the surface of Thin Film Composite (TFC) membranes to concurrently enhance inorganic scaling resistance and facilitate membrane reusability. The sacrificial layer (Fe3+-TA) consisted of tannic acid (TA) complexed with iron ions (Fe3+) and could be removed and regenerated in situ. The results demonstrated that the Fe3+-TA layer significantly improved the membrane's surface smoothness and densification, maintaining superior anti-scaling performance. The modified membrane exhibited remarkable durability, sustaining six reuse cycles with a flux recovery exceeding 97 % in gypsum scaling tests. Furthermore, the formation of new complexes during gypsum scaling tests confirmed the membrane's augmented scaling retardation capabilities. Thus, integrating of a sacrificial layer into TFC membranes presents a promising strategy for advancing membrane distillation processes in hypersaline wastewater treatment. © 2024 Elsevier B.V.

Keyword :

Anti-scaling Anti-scaling Inorganic scaling Inorganic scaling Membrane distillation Membrane distillation Reuse Reuse Sacrificial protective layer Sacrificial protective layer

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GB/T 7714 Yan, Z. , Lin, S. , Chang, H. et al. Functional of thin-film composite Janus membrane with sacrificial layer for inorganic scaling control in membrane distillation [J]. | Journal of Membrane Science , 2024 , 710 .
MLA Yan, Z. et al. "Functional of thin-film composite Janus membrane with sacrificial layer for inorganic scaling control in membrane distillation" . | Journal of Membrane Science 710 (2024) .
APA Yan, Z. , Lin, S. , Chang, H. , Xu, J. , Dai, W. , Qu, D. et al. Functional of thin-film composite Janus membrane with sacrificial layer for inorganic scaling control in membrane distillation . | Journal of Membrane Science , 2024 , 710 .
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Functional of thin-film composite Janus membrane with sacrificial layer for inorganic scaling control in membrane distillation SCIE
期刊论文 | 2024 , 710 | JOURNAL OF MEMBRANE SCIENCE
Functional of thin-film composite Janus membrane with sacrificial layer for inorganic scaling control in membrane distillation EI
期刊论文 | 2024 , 710 | Journal of Membrane Science
New insights into antifouling property and interfacial mechanism in photo-Fenton membrane distillation EI
期刊论文 | 2024 , 492 | Chemical Engineering Journal
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Abstract :

Membrane distillation (MD), boasting high interception efficiency and low operational pressures, emerges as an innovative membrane technology. However, the occurrence of membrane fouling due to interaction between natural organic matter (NOM) and inorganic ions during the MD process curtails water purification efficiency, thereby constraining its potential applications. To address this quandary, this study integrates sulfate radical-based advanced oxidation processes (SR-AOPs) into MD technology to bolster membrane fouling control. A straightforward hydrothermal method coupled with vacuum filtration was employed to synthesize a Co3O4/Nitrogen-modified carbon quantum dots (NCDs)/PVDF (CN-PVDF) membrane for the first time, which was utilized in the MD treatment of simulated humic acid (HA) wastewater. Under visible light irradiation (1.9 kW/m2), CN-PVDF membrane activation of peroxymonosulfate (PMS) effectively altered the chemical attributes of the MD feed solution and reduced organic matter concentration. Moreover, it dismantled the carboxyl sites on HA that interact with Ca2+, consequently attenuating the formation of organic–inorganic complex pollutants. The XDLVO analysis showcased that photo-Fenton oxidation led to a diminishment in pollutant hydrophobicity, correlating with a 17.59 kT reduction in pollutant-membrane adsorption and a 7.47 kT amplification in adhesion barriers. This strategy transformed the initial two-stage fouling mode into a singular one, which significantly decreased the flux decline and the fouling layer thickness. Furthermore, the CN-PVDF membrane demonstrated self-cleaning capabilities via photo-Fenton. This study advances an innovative approach to bolster the fouling resistance of MD membranes and provides substantial theoretical support for the integration of SR-AOPs and MD technologies. © 2024

Keyword :

Biogeochemistry Biogeochemistry Chemicals removal (water treatment) Chemicals removal (water treatment) Distillation Distillation Efficiency Efficiency Membrane fouling Membrane fouling Membrane technology Membrane technology Microfiltration Microfiltration Organic compounds Organic compounds Oxidation Oxidation Semiconductor quantum dots Semiconductor quantum dots Sulfur compounds Sulfur compounds Wastewater treatment Wastewater treatment

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GB/T 7714 Lu, Zhenyu , Yan, Zhongsen , Chang, Haiqing et al. New insights into antifouling property and interfacial mechanism in photo-Fenton membrane distillation [J]. | Chemical Engineering Journal , 2024 , 492 .
MLA Lu, Zhenyu et al. "New insights into antifouling property and interfacial mechanism in photo-Fenton membrane distillation" . | Chemical Engineering Journal 492 (2024) .
APA Lu, Zhenyu , Yan, Zhongsen , Chang, Haiqing , Wang, Qiankun , Liu, Fujian , Ni, Qichang et al. New insights into antifouling property and interfacial mechanism in photo-Fenton membrane distillation . | Chemical Engineering Journal , 2024 , 492 .
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New insights into antifouling property and interfacial mechanism in photo-Fenton membrane distillation SCIE
期刊论文 | 2024 , 492 | CHEMICAL ENGINEERING JOURNAL
New insights into antifouling property and interfacial mechanism in photo-Fenton membrane distillation Scopus
期刊论文 | 2024 , 492 | Chemical Engineering Journal
Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways SCIE CSCD
期刊论文 | 2024 , 18 (3) | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
WoS CC Cited Count: 2
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Abstract :

Iron-based catalysts have been widely used to treat refractory organic pollutants in wastewater. In this paper, magnetic Co-gamma-Fe(2)O(3 )was synthesized by a facile tartaric acid-assisted hydrothermal method, and Co-gamma-Fe2O3/MoS2 nanocomposite catalyst was obtained via in situ growth of MoS2 nanosheets on Co-gamma-Fe2O3 nanoparticles. The nanocomposite catalysts were used to decompose bisphenol A (BPA) by activating peroxymonosulfate (PMS). It was shown that only 0.15 g/L catalyst and 0.5 mmol/L PMS degraded 10 mg/L of BPA (99.3% within 10 min) in the pH range of 3-9. PMS was activated due to redox cycling among the pairs Co(III)/Co(II), Fe(III)/Fe(II), and Mo(VI)/Mo(IV). Quenching experiments and electron paramagnetic resonance spectroscopy demonstrated that both radical and non-radical pathways were involved in BPA degradation, in which active radical sulfate radical and non-radical singlet oxygen were the main reactive oxygen species. Ten intermediates were identified by liquid chromatography-coupled mass spectrometry, and three possible BPA degradation pathways were proposed. The toxicity of several degradation intermediates was lower, and Co-gamma-Fe2O3/MoS2 exhibited excellent reusability and could be magnetically recovered.

Keyword :

Bisphenol A Bisphenol A Degradation pathways Degradation pathways Hydrothermal method Hydrothermal method Magnetic Co-gamma-Fe2O3/MoS2 Magnetic Co-gamma-Fe2O3/MoS2 Toxicity analysis Toxicity analysis

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GB/T 7714 Xu, Junge , Wang, Dong , Hu, Die et al. Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways [J]. | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING , 2024 , 18 (3) .
MLA Xu, Junge et al. "Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways" . | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 18 . 3 (2024) .
APA Xu, Junge , Wang, Dong , Hu, Die , Zhang, Ziwei , Chen, Junhong , Wang, Yingmu et al. Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways . | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING , 2024 , 18 (3) .
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Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways Scopus CSCD
期刊论文 | 2024 , 18 (3) | Frontiers of Environmental Science and Engineering
Magnetic Co-doped 1D/2D structured γ-Fe2O3/MoS2 effectively activated peroxymonosulfate for efficient abatement of bisphenol A via both radical and non-radical pathways EI CSCD
期刊论文 | 2024 , 18 (3) | Frontiers of Environmental Science and Engineering
Sulfur cycle contributes to stable autotrophic denitrification and lower N2O accumulation in electrochemically integrated constructed wetlands: Electron transfers patterns and metagenome insights SCIE
期刊论文 | 2023 , 451 | CHEMICAL ENGINEERING JOURNAL
WoS CC Cited Count: 14
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Abstract :

Excessive discharge of nutrients from wastewater treatment plants (WWTPs) is an important pollutant source of eutrophic water bodies. In this work, three electrochemically integrated horizontal flow constructed wetlands (E-HFCWs) were developed for advanced nutrients removal from WWTPs effluent with different S/N ratios. In E-HFCWs, PO43-, NO3--N and TN removal percentages at current of 0.2 A and hydraulic retention time (HRT) of 24 h did not differ significantly as S/N ratios altered. When fed with low, middle and high concentrations of SO42--S wastewater during this period, PO43--P removal percentages respectively reached 99.3 %+/- 0.9 %, 99.2 %+/- 1.1 % and 99.0 %+/- 1.4 %, NO3--N removal percentages respectively reached 99.5 %+/- 0.5 %, 99.6 %+/- 0.4 % and 99.4 %+/- 0.8 %, and TN removal percentages respectively reached 92.0 %+/- 2.5 %, 90.8 %+/- 3.4 % and 91.2 %+/- 2.7 %. This work highlighted that sulfur cycle played crucial roles in improving nitrogen removal stability as current or HRT decreased in higher S/N ratio groups. The formed sulfur ferrites under higher current or HRT condition served as "electron reservoir", and would resupply electron for denitrification when electron supplied by electrolysis was deficient. In addition, the higher S/N ratio groups allowed significantly lower N2O accumulation, which was accordance with the concept of carbon neutral. Based on metagenome results, the occurrence of more abundant sulfur-oxidizing denitrifying genes and bacteria (e.g., Thiobacillus) in higher S/N ratio groups under lower current or HRT further demonstrated the significant roles of sulfur cycle in stable autotrophic denitrification performance in E-HFCWs. Overall, this work provides perspective on the future practical application for the regulation of nitrogen removal stability enhancement and N2O emission reduction in electrochemically integrated bioreactors.

Keyword :

Autotrophic denitrification Autotrophic denitrification Biological nutrients removal Biological nutrients removal Constructed wetlands Constructed wetlands Metagenome analysis Metagenome analysis Tertiary treatment Tertiary treatment

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GB/T 7714 Wang, Yingmu , Xie, Shikang , Zhou, Jian et al. Sulfur cycle contributes to stable autotrophic denitrification and lower N2O accumulation in electrochemically integrated constructed wetlands: Electron transfers patterns and metagenome insights [J]. | CHEMICAL ENGINEERING JOURNAL , 2023 , 451 .
MLA Wang, Yingmu et al. "Sulfur cycle contributes to stable autotrophic denitrification and lower N2O accumulation in electrochemically integrated constructed wetlands: Electron transfers patterns and metagenome insights" . | CHEMICAL ENGINEERING JOURNAL 451 (2023) .
APA Wang, Yingmu , Xie, Shikang , Zhou, Jian , Fan, Gongduan , He, Lei , Fan, Xing et al. Sulfur cycle contributes to stable autotrophic denitrification and lower N2O accumulation in electrochemically integrated constructed wetlands: Electron transfers patterns and metagenome insights . | CHEMICAL ENGINEERING JOURNAL , 2023 , 451 .
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Sulfur cycle contributes to stable autotrophic denitrification and lower N2O accumulation in electrochemically integrated constructed wetlands: Electron transfers patterns and metagenome insights EI
期刊论文 | 2022 , 451 | Chemical Engineering Journal
基于智慧监测和DMA预测居民夜间用水量 CSCD PKU
期刊论文 | 2023 , 39 (23) , 40-45 | 中国给水排水
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Abstract :

为挖掘智能水表的水量数据价值,以福州市7个独立计量区(DMA)的居民小区窄带物联网(NB-IoT)水表的远传数据为基础样本,采用统计学方法,探究户均用水量和户均夜间用水量之间的规律,并据此科学预测福州市居民的夜间用水量。结果表明:当采用样本总体平均值法预测居民夜间用水量时,部分小区的估计值误差较大;当采用线性回归法时,户均合法夜间用水量与户均合法用水量、户均有效夜间用水量与户均有效用水量均存在显著的线性相关性。抽样其他3个户数规模不同的居住小区进行验证,证明线性回归法具有普适性且误差小等特点。据此,未装智能远传水表的DMA小区居民夜间用水量能够由此预测推算,从而为小区的漏损量化控制提供科学依据。

Keyword :

居民夜间用水量 居民夜间用水量 智慧监测 智慧监测 漏损量化控制 漏损量化控制 独立计量区(DMA) 独立计量区(DMA) 线性回归 线性回归

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GB/T 7714 许兴中 , 李伟英 , 魏忠庆 et al. 基于智慧监测和DMA预测居民夜间用水量 [J]. | 中国给水排水 , 2023 , 39 (23) : 40-45 .
MLA 许兴中 et al. "基于智慧监测和DMA预测居民夜间用水量" . | 中国给水排水 39 . 23 (2023) : 40-45 .
APA 许兴中 , 李伟英 , 魏忠庆 , 许俊鸽 . 基于智慧监测和DMA预测居民夜间用水量 . | 中国给水排水 , 2023 , 39 (23) , 40-45 .
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基于智慧监测和DMA预测居民夜间用水量 CSCD PKU
期刊论文 | 2023 , 39 (23) , 40-45 | 中国给水排水
The dual pathway mechanisms of peroxyacetic acid activation by CoMn2O4 spinel for efficient levofloxacin degradation SCIE
期刊论文 | 2023 , 11 (3) | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
WoS CC Cited Count: 11
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Abstract :

In this work, CoMn2O4 spinel catalyst was used for the first time to activate peroxyacetic acid (PAA) for the degradation of fluoroquinolone antibiotic levofloxacin (LVF). The results showed that the degradation efficiency of CoMn2O4/PAA system reached 93% within 15 min at initial LVF concentration of 20 mg/L. In addition, the bimetallic oxide CoMn2O4 with spinel structure showed significantly higher activation performance than the single metal oxide (Co3O4 and MnO2). The excellent PAA activation performance by CoMn2O4 was attributed to the redox cycles between Co3+/ Co2+, Mn3+/ Mn2+, and Mn4+/ Mn3+, as well as the synergistic interaction between Co and Mn species. Radical quenching and electron paramagnetic resonance (EPR) spectra results indicated that acetylperoxyl radical (CH3C(O)OO center dot) was the dominant radical species, and this work highlighted that O-1(2) played an important role in non-radical process in PAA-based AOPs for the first time. The production of O-1(2) may be attributed to the interaction between reactive oxygen (O*) and PAA. In addition, the CoMn2O4/PAA system has been proved to have great stability and reusability, and exhibit selective degradation of organic pollutants which contained electron-rich groups. Overall, this work presents perspective for the application of antibiotic remediation by CoMn2O4/PAA process.

Keyword :

Advanced oxidation Advanced oxidation CoMn2O4 catalyst CoMn2O4 catalyst Degradation pathway Degradation pathway Peroxyacetic acid Peroxyacetic acid Selective degradation Selective degradation

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GB/T 7714 Fan, Gongduan , Yao, Lei , Wang, Yingmu et al. The dual pathway mechanisms of peroxyacetic acid activation by CoMn2O4 spinel for efficient levofloxacin degradation [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2023 , 11 (3) .
MLA Fan, Gongduan et al. "The dual pathway mechanisms of peroxyacetic acid activation by CoMn2O4 spinel for efficient levofloxacin degradation" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 11 . 3 (2023) .
APA Fan, Gongduan , Yao, Lei , Wang, Yingmu , Peng, Xiaoxu , Xu, Junge , Pang, Shenghua et al. The dual pathway mechanisms of peroxyacetic acid activation by CoMn2O4 spinel for efficient levofloxacin degradation . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2023 , 11 (3) .
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The dual pathway mechanisms of peroxyacetic acid activation by CoMn2O4 spinel for efficient levofloxacin degradation
期刊论文 | 2023 , 11 (3) , 109774 | Journal of Environmental Chemical Engineering
The dual pathway mechanisms of peroxyacetic acid activation by CoMn2O4 spinel for efficient levofloxacin degradation EI
期刊论文 | 2023 , 11 (3) | Journal of Environmental Chemical Engineering
The dual pathway mechanisms of peroxyacetic acid activation by CoMn2O4 spinel for efficient levofloxacin degradation Scopus
期刊论文 | 2023 , 11 (3) | Journal of Environmental Chemical Engineering
Co-doped Fe3O4/alpha-FeOOH for highly efficient peroxymonosulfate activation to degrade trimethoprim: Occurrence of hybrid non-radical and radical pathways SCIE
期刊论文 | 2023 , 325 | JOURNAL OF ENVIRONMENTAL MANAGEMENT
WoS CC Cited Count: 16
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Trimethoprim (TMP), as a widely used chemotherapeutic antibiotic agent, has caused potential risks to the aquatic environment. In this study, magnetic Co-doped Fe3O4/alpha-FeOOH was fabricated by a facile one-step ageing method and used for activation of peroxymonosulfate (PMS) in TMP degradation. It was found that low catalyst (0.5 g/L) and PMS addition (0.2 mM) led to the high degradation efficiency of TMP (97.2%, k(obs) = 0.11211 min(-1)) over a wide range of pH. The oxidation of active radical (SO4 center dot(-)) and non-radical singlet oxygen (O-1(2)) co-acted on TMP degradation. Besides, PMS was activated through the cycles between Co(II)/Co(III) and Fe (II)/Fe(III). Fifteen degradation intermediates of TMP were identified by LC-MS, and three possible degradation pathways including hydroxylation, demethylation, and cleavage were proposed. The recovered catalysts exhibited high stability and reusability, maintaining 80% TMP removal efficiency with inappreciable metal leaching (0.012 mg/L of Co, 0.113 mg/L of Fe) after six cycles. Besides, the Co-Fe3O4/alpha-FeOOH/PMS system was highly tolerant to inorganic anions and actual water bodies (river water, lake water, tap water, and sewage plant effluent). Overall, this work provided a promising way to the potential application of Fe-based binary metal oxide for PMS activation.

Keyword :

Advanced oxidation process Advanced oxidation process Antibiotic Antibiotic Degradation pathways Degradation pathways Magnetic recovery Magnetic recovery PMS activation PMS activation

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GB/T 7714 Xu, Junge , Zhang, Ziwei , Hong, Junxian et al. Co-doped Fe3O4/alpha-FeOOH for highly efficient peroxymonosulfate activation to degrade trimethoprim: Occurrence of hybrid non-radical and radical pathways [J]. | JOURNAL OF ENVIRONMENTAL MANAGEMENT , 2023 , 325 .
MLA Xu, Junge et al. "Co-doped Fe3O4/alpha-FeOOH for highly efficient peroxymonosulfate activation to degrade trimethoprim: Occurrence of hybrid non-radical and radical pathways" . | JOURNAL OF ENVIRONMENTAL MANAGEMENT 325 (2023) .
APA Xu, Junge , Zhang, Ziwei , Hong, Junxian , Wang, Dong , Fan, Gongduan , Zhou, Jian et al. Co-doped Fe3O4/alpha-FeOOH for highly efficient peroxymonosulfate activation to degrade trimethoprim: Occurrence of hybrid non-radical and radical pathways . | JOURNAL OF ENVIRONMENTAL MANAGEMENT , 2023 , 325 .
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Co-doped Fe3O4/α-FeOOH for highly efficient peroxymonosulfate activation to degrade trimethoprim: Occurrence of hybrid non-radical and radical pathways Scopus
期刊论文 | 2023 , 325 | Journal of Environmental Management
Co-doped Fe3O4/α-FeOOH for highly efficient peroxymonosulfate activation to degrade trimethoprim: Occurrence of hybrid non-radical and radical pathways EI
期刊论文 | 2023 , 325 | Journal of Environmental Management
alpha-(Fe, Cu)OOH/RGO nanocomposites for heterogeneous photo-Fenton-like degradation of ciprofloxacin under visible light irradiation SCIE
期刊论文 | 2022 , 29 (52) , 78874-78886 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
WoS CC Cited Count: 4
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Ciprofloxacin (CIP) is a third-generation fluoroquinolones (FQs) antibiotic, and the occurrence of CIP in the water environment has raised growing concerns owning to its environmental toxicity. In this paper, a novel alpha-(Fe, Cu)OOH/RGO nanocomposite was synthesized via a one-step reflux method for CIP degradation through a photo-Fenton-like process. When the RGO content was 1 wt%, CIP degradation ratio by the alpha-(Fe, Cu)OOH/RGO nanocomposite reached 100% under visible light irradiation within 120 min, and total organic carbon (TOC) removal ratio reached 60% within 180 min. The result of molecular fluorescence spectra highlighted that the loading of RGO on the oc-(Fe, Cu)OOH significantly increased the content of hydroxyl radicals (center dot OH) in the heterogeneous photo-Fenton-like system and simultaneously inhibited the recombination of photogenerated electron and hole, which played critical roles in the enhancement of CIP degradation. In addition, 11 main intermediates were identified as the degradation products of CIP in the alpha-(Fe, Cu)OOH/RGO/H2O2/visible light reaction systems using liquid chromatograph-mass spectrometer (LC-MS) analyses. The results demonstrated that three degradation pathways for CIP removal by alpha-(Fe, Cu)OOH/RGO nanocomposite occurred, including (i) oxidation on the piperazine ring and dealkylation, (ii) defluorination and decarboxylation, and (iii) hydroxylation on the quinolone ring. This work would provide a novel insight of CIP degradation pathways in photo-Fenton-like processes.

Keyword :

alpha-(Fe, Cu)OOH/RGO alpha-(Fe, Cu)OOH/RGO Antibiotics Antibiotics Ciprofloxacin Ciprofloxacin Degradation pathways Degradation pathways Photo-Fenton-like Photo-Fenton-like

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GB/T 7714 Xu, Junge , Hu, Die , Wang, Yingmu et al. alpha-(Fe, Cu)OOH/RGO nanocomposites for heterogeneous photo-Fenton-like degradation of ciprofloxacin under visible light irradiation [J]. | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2022 , 29 (52) : 78874-78886 .
MLA Xu, Junge et al. "alpha-(Fe, Cu)OOH/RGO nanocomposites for heterogeneous photo-Fenton-like degradation of ciprofloxacin under visible light irradiation" . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 29 . 52 (2022) : 78874-78886 .
APA Xu, Junge , Hu, Die , Wang, Yingmu , Zhang, Ziwei . alpha-(Fe, Cu)OOH/RGO nanocomposites for heterogeneous photo-Fenton-like degradation of ciprofloxacin under visible light irradiation . | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH , 2022 , 29 (52) , 78874-78886 .
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α-(Fe, Cu)OOH/RGO nanocomposites for heterogeneous photo-Fenton-like degradation of ciprofloxacin under visible light irradiation Scopus
期刊论文 | 2022 , 29 (52) , 78874-78886 | Environmental Science and Pollution Research
Metagenomic analysis reveals the influence of pH and hydraulic loading on thiosulfate-driven denitratation: Insight into efficient performance and microbial mechanism SCIE
期刊论文 | 2022 , 170 , 898-907 | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
WoS CC Cited Count: 5
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Abstract :

This study evaluated the performance of thiosulfate-driven denitratation (TDD) systems. The results demon-strated that a cycle time of 4.00 h was adequate for NO3 --Nremoval and NO2 --Naccumulation (average NO3 --Nremoval efficiencies (NREs): 95%; average NO3 --Naccumulation efficiencies (NAEs): 79%) under pH range of 6.50-9.50. According to metagenomic research, the enrichment of dominant denitrifiers is essential for the pH responsiveness of the TDD system. Furthermore, interspecific microorganism cooperation and the potential se-lective advantage of NO3 --Nreducing bacteria over NO2 --Nreducing bacteria contributed to a higher NO2 --Naccumulation efficiency. In addition, the results revealed that the reduction in hydraulic loading time (HRT) improved metabolic activities (i.e., energy metabolism). Overall, this study broadened the application potential of the TDD system and enhanced the understanding of microbial niches and the metabolic potential of auto-trophic denitrification from electron transfer and metagenomic insights.

Keyword :

Functional microorganism Functional microorganism Metagenomic sequencing Metagenomic sequencing Nitrite accumulation Nitrite accumulation Partial denitrification Partial denitrification Potential interspecies cooperation Potential interspecies cooperation

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GB/T 7714 Liu, Yihui , Xie, Shikang , Chen, Yuanjing et al. Metagenomic analysis reveals the influence of pH and hydraulic loading on thiosulfate-driven denitratation: Insight into efficient performance and microbial mechanism [J]. | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2022 , 170 : 898-907 .
MLA Liu, Yihui et al. "Metagenomic analysis reveals the influence of pH and hydraulic loading on thiosulfate-driven denitratation: Insight into efficient performance and microbial mechanism" . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 170 (2022) : 898-907 .
APA Liu, Yihui , Xie, Shikang , Chen, Yuanjing , Chen, Shi , Fan, Gongduan , Xu, Junge et al. Metagenomic analysis reveals the influence of pH and hydraulic loading on thiosulfate-driven denitratation: Insight into efficient performance and microbial mechanism . | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION , 2022 , 170 , 898-907 .
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Metagenomic analysis reveals the influence of pH and hydraulic loading on thiosulfate-driven denitratation: Insight into efficient performance and microbial mechanism EI
期刊论文 | 2023 , 170 , 898-907 | Process Safety and Environmental Protection
Metagenomic analysis reveals the influence of pH and hydraulic loading on thiosulfate-driven denitratation: Insight into efficient performance and microbial mechanism Scopus
期刊论文 | 2023 , 170 , 898-907 | Process Safety and Environmental Protection
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