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Lanthanide Mofs Based Portable Fluorescence Sensing Platform: Quantitative and Visual Detection of Ciprofloxacin and Al3+

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SSRN 2023年

作者： Meng, Shuang Liu, Jiaxiang Yang, Yuanyuan Mao, Shun Li, Zhuo State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science & Engineering Shanghai Institute of Pollution Control and Ecological Security Tongji University 1239 Siping Road Shanghai200092 China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai200120 China

In the current context of water environmental monitoring and pollution control, there's a crucial need for rapid and simple methods to detect multi-pollutant. We herein report an easy one-step hydrothermal synthesis method to produce Eu-based metal-organic frameworks (Eu MOFs), which was used as a fluorescent probe to detect the aquatic environmental pollutants of ciprofloxacin (CIP) and aluminum ions (Al3+). This fluorescent sensor enabled the cascade detection of CIP and Al3+ through fluorescence enhancement and ratio fluorescence response, respectively. The introduction of CIP significantly turned on the characteristic fluorescence of Eu MOFs at 595 nm and 616 nm through the "antenna effect". Based on this, the sensor enables quantitative detection of CIP within a linear range of 0-120 μM with a LOD as low as 50.421 nM. In the presence of Al3+, the fluorescence emission of Eu MOFs-CIP was sharply turned off due to strong Al3+ coordination with CIP, while the blue fluorescence emission of CIP was remarkably enhanced. And thus allowing ratio fluorescence quantitative detection of Al3+ (LOD = 2.681 μM). The introduction of CIP and Al3+ in cascade resulted in distinct fluorescence color changes from colorless to red and eventually to blue, exhibiting pronounced fluorescence characteristics. This observable phenomenon enables the visual detection of CIP and Al3+ in both liquid phase and paper test strips. By combining the analysis of fluorescence chromaticity with the use of a smartphone, the test paper fluorescence color allows for simple quantitative determination, which provides a convenient and accessible approach for quantifying CIP and Al3+ in water environments. © 2023, The Authors. All rights reserved.

关键词： Fluorescence

Synergical Effects of Nb and Sio2 on Enhanced No Elimination and Sulfur Resistance of Fe2o3-Scr Catalyst

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SSRN 2024年

作者： Zhao, Wenrui Li, Lulu Jiang, Peiting Zou, Weixin College of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang212000 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Jiangsu Key Laboratory of Vehicle Emissions Control Nanjing University Nanjing210023 China College of Environmental and Chemical Engineering Jiangsu University of Science and Technology Zhenjiang212000 China

Fe2O3-based catalysts have attracted increasing interests for their use in NH3-SCR (selective catalytic reduction) reaction, while the wide application of Fe2O3-based catalysts is limited by its unsatisfying NO conversion at low temperature and poor anti-SO2 ability. In this study, by virtue of FeSi composite oxide with large specific surface area as support obtained by doping Si into pristine Fe2O3, and NbOx species was used for surface modification to improve its NH3-SCR activity. The optimal Nb/FeSi catalyst exhibited over 90% NO conversion in the temperature interval of 250-400 oC and displayed excellent SO2 resistance at 225 oC. For the contribution of different components to the catalytic activity, Si contributes large specific surface area and more Brønsted acid sites, facilitating the dispersion of active components and the activation of NH3 species. Nb could promote the generation of more oxygen vacancies and abundant Brønsted acid sites while inhibits the adsorption of NOx. © 2024, The Authors. All rights reserved.

关键词： Selective catalytic reduction

Facile Fabrication of 2d Mof-Based Membrane with Hierarchical Structures for Ultrafast Oil-Water Separation

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SSRN 2022年

作者： He, XuanTing Li, Boyu Liu, Jiaxiang Tao, Wenquan Li, Zhuo State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science & Engineering Tongji University 1239 Siping Road Shanghai200092 China

The surface chemical composition and building unit structures of membrane are the key factors to realize highly-efficient oil-water separation. Here we report the synthesis of Cu-CAT-1 metal-organic frameworks (MOFs) with unique two-dimensional (2D) hierarchical structures grown directly on copper mesh (Cu-CAT-1@CM) for oil-water separation. The Cu-CAT-1@CM membrane with micro-/nano- architecture exhibits robust superhydrophilicity and underwater super-hydrophobicity characteristics, allowing gravity-driven oil-water separation by achieving ultrahigh flux up to 329 kL∙m-2∙h-1. The membrane shows excellent separation performances by testing various oils, particularly actual crude oil and xylene, which are considered as the notorious pollutants in the water. The residual oil contents of six samples are all less than 24.6 mg/L. The mechanism analysis demonstrated that the appropriate hierarchical structures of the membrane surface is the code for the extreme wettability that remarkably improved the separation efficiency. Moreover, such a membrane with high performance can be readily synthesized by electrochemical method at room temperature in only 20 minutes, which shows the advantages of facile and environmentally friendly fabrication process as well as low cost. This energy-saving of gravity-driven and ultra-high permeability allows the rapid separation of oil-water mixture, which shows the potential applications for resolving the problem of oil pollution. © 2022, The Authors. All rights reserved.

关键词： Membranes

Surface Coordination Environment Engineering on Ptxcu1-X Alloy Catalysts for the Efficient Photocatalytic Reduction of Co2 to Ch4

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SSRN 2023年

作者： Wang, Xin Liao, Haohong Li, Xue Ji, Jiawei Wu, Cong Tong, Qing Tan, Wei Wan, Haiqin Dong, Lin State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China State Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing210023 China Jiangsu Key Laboratory of Vehicle Emissions Control Center of Modern Analysis Nanjing University Nanjing210023 China

Alloy catalysts have been reported to be robust in catalyzing various heterogeneous reactions. In this work, aimed at understanding the effect of the surface coordination environment on the catalytic performance of alloy catalysts, a series of PtxCu1-x supported on anatase-phase TiO2 were developed and applied in photocatalytic CO2 reduction reaction. According to the results of catalytic performance evaluation, it was found that the photocatalytic CO2 reduction activity on PtxCu1-x/Ti showed a volcanic change, the highest CH4 production was achieved on Pt0.5Cu0.5/Ti. Further systematic characterizations and theoretical calculations revealed Pt0.5Cu0.5/Ti facilitated the generation of more Cu-Pt paired sites which would favor a bridge adsorption configuration of CO2 and facilitate the electron transfer, thus resulting in the highest photocatalytic CO2 reduction efficiency on Pt0.5Cu0.5/Ti. This work provided new insights into the design of robust CO2 reduction photocatalysts with high CH4 production from the perspective of surface coordination environment engineering. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

A review on analytical methods for pharmaceutical and personal care products and their transformation products

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Journal of Environmental Sciences 2021年第3期33卷 260-281页

作者： Yuan Meng Weiyi Liu Xiaohui Liu Jinlan Zhang Meng Peng Tingting Zhang Department of Environmental Science and Engineering Beijing Environmental Pollution Control and Resource Engineering Research CenterBeijing University of Chemical TechnologyBeijing 100029China National Engineering Laboratory for Lake Pollution Control and Ecological Restoration State Key Laboratory of Environmental Criteria and Risk AssessmentChinese Research Academy of Environmental SciencesBeijing 100012China School of Environment Tsinghua UniversityBeijing 100084China

Pharmaceutical and personal care products(PPCPs)and corresponding transformation products have caused widespread concern due to their persistent emissions and potential *** have wide octanol-water partition coefficients(K_(ow))and different ionization constants(pK_(a))resulting in a poor analysis accuracy and efficiency.A suitable analytical method is the first prerequisite for further research on their environmental behavior to prioritize the *** study reviewed a full-scale analytical protocol for environmental samples in the recent ten years:from sampling to instrumental *** sampling techniques were compared and recommended for long-term continuous and scientific observation.A quick and effective sample extraction and clean-up method are highly *** methods coupled to mass spectrometry for determining PPCPs with a wide range of logK_(ow)(-7.53 to 10.80)were summed ***-resolution mass spectrometry was confirmed to be a promising strategy for screening unknown transformation products,which would provide a nanogram level of detection limits and more accurate mass *** strategies and mass change principles were summarized in *** recovery rate was important in multiple contaminants analysis identification and factors affecting the recovery rate of PPCPs were also discussed in this review,including sample matrix,target compounds characteristics,extraction method and solid-phase *** review provides useful information for the selection of appropriate analytical methods and future development directions.

关键词： Pharmaceutical and personal care products Transformation products Passive sampling Extraction High-resolution mass spectrometry

The Removal of Antibiotics Resistant Bacteria and Genes by Sulfidated Nanoscale Zero-Valent Iron Activating Periodate: Efficacy and Mechanism

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SSRN 2023年

作者： Liang, Li Zhang, Guosheng Dai, Xuening Li, Weiying State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai200092 China College of Environmental Science and Engineering Tongji University Shanghai200092 China Key Laboratory of Yangtze River Water Environment the Ministry of Education Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

In this study, the performance of sulfidated nanoscale zero-valent iron (S-nZVI)/periodate (PI) system toward ARB inactivation and ARGs removal was systematically investigated. The S-nZVI/PI system could realize the complete inactivation of 1 × 108 CFU/mL kanamycin, ampicillin, and tetracycline-resistant E. coli HB101 within 40 min, meanwhile, possessed the ability to remove the intracellular ARGs (iARGs) (including aphA, tetA, and tnpA) carried by E. coli HB101. Specifically, the removal of aphA, tetA, and tnpA by S-nZVI/PI system after 40 min reaction was 0.31, 0.47, and 0.39 log, respectively. The reactive species attributed to the E. coli HB101 inactivation were HO• and O2•−, which could cause the destruction of E. coli HB101 morphology and enzyme system, the leakage of intracellular substances, and the damage of iARGs. It was found that the high dosage of PI and S-nZVI and the low concentration of E. coli HB101 could enhance the disinfection performance of S-nZVI/PI system. The presence of HCO3–, NO3–, and HA in S-nZVI/PI system showed inhibiting role on the inactivation of E. coli HB101 and its corresponding iARGs removal. © 2023, The Authors. All rights reserved.

关键词： Escherichia coli

Physiological and Morphological Responses of Chlorella Pyrenoidosa to Different Exposure Methods of Graphene Oxide Quantum Dots

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SSRN 2022年

作者： You, Xiaogang Chen, Can Yang, Libin Xia, Xuefen Zhang, Yalei Zhou, Xuefei College of Environmental Science and Engineering Tongji University Shanghai200092 China State Key Laboratory of Pollution Control and Resource Reuse Shanghai200092 China

The light-emitting properties of graphene oxide quantum dots (GOQDs) can convert the wavelength of light and are being applied to the cultivation of microalgae for biomass production. However, it has not yet found application in large-scale photobioreactor systems due to its high cost and difficulty in recovery. This study proposes a new strategy for the sustainable use of GOQDs by adding GOQDs solutions to the outer sandwich of the reactor isolated from the microalgae. Herein, the effects of direct and indirect exposure methods and concentrations of GOQDs on microalgae biomass accumulation and intracellular fractions were compared. When GOQDs were directly exposed to the microalgae, 100 mg/L GOQDs increased the biomass of microalgae by 24.0%, while 1000 mg/L GOQDs decreased the biomass of microalgae by 31%. Direct exposure of GOQDs at high concentration can cause oxidative stress beyond the carrying capacity of the microalgae and cause a significant reduction in the pigment content within the microalgae to occur. When GOQDs were indirectly exposure, the increased concentration of GOQDs did not inhibit the growth of microalgae. On the contrary, GOQDs at 1000 mg/L increased the microalgae biomass by 14.1% and bioenergy by 40.17% compared to the blank group. The indirect exposure of GOQDs can effectively avoid photo-oxidation and organelle damage caused by direct contact with microalgae. Overall, the indirect exposure of GOQDs can effectively promote the growth of microalgae and can be reused, reducing the application cost of GOQDs for microalgae culture. © 2022, The Authors. All rights reserved.

关键词： Microalgae

Effective Oxidation and Adsorption of As(Iii) in Water by Nanoconfined Ce-Mn Binary Oxides with Excellent Reusability

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SSRN 2024年

作者： Qiu, Shun Chen, Zhanxun Yu, Ling Liu, Chuying Ji, Chenghan Shen, Pengfei Cheng, Sikai Qiu, Hui Fang, Zhuoyao Zhang, Xiaolin Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing210044 China College of Civil Engineering Nanjing Forestry University Nanjing210037 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Herein, a highly efficient As(III) purifier Ce-Mn@N201 with excellent reusability was developed by stepwise precipitating hydrated cerium oxides (HCO) and hydrated manganese oxides (HMO) inside N201, a widely-used gel-type anion exchange resin. Owing to confinement of unique nanopores in N201, the in-situ generated nanoparticles (NPs) inside Ce-Mn@N201 were highly dispersed with ultra-small sizes of around 2.6 nm. Results demonstrated that HMO NPs effectively oxidized As(III) to As(V), with most of generated Mn2+ being re-adsorbed onto the negatively-charged surface of HMO NPs. During the regeneration process by simple alkaline treatment, the re-adsorbed Mn2+ was firstly precipitated as (hydr)oxides of Mn(II) and then oxidized to HMO NPs by dissolved oxygen to fully refresh its oxidation capacity. Though HCO NPs mainly served as adsorbent for arsenic, they could partially oxidize As(III) to As(V) at the beginning, while the oxidation capacities continuously diminished with the irreversible conversion of Ce(IV) to Ce(III). In 10 consecutive adsorption-regeneration cycle, Ce-Mn@N201 efficiently decontaminated As(III) from 500 μg/L to below 5 μg/L with Mn2+ leaching less than 0.3% per batch. During 3 cyclic fixed-bed adsorptions, Ce-Mn@N201 steadily produced 8500-9150 bed volume (BV) and 3150-3350 BV drinkable water from the synthesized and real groundwater, respectively, with negligible Mn leaching. © 2024, The Authors. All rights reserved.

关键词： Manganese oxide

Comprehensive evaluation framework for intervention on health effects of ambient temperature

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Eco-Environment & Health 2024年第2期3卷 154-164页

作者： Jiaming Wang Peng Wang Beibei Liu Patrick L.Kinney Lei Huang Kai Chen State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Faculty of Civil Engineering and Mechanics Jiangsu UniversityZhenjiang 212013China Department of Environmental Health Boston University School of Public HealthBostonMA 02118USA Center for Public Health Research Medical School of Nanjing UniversityNanjing 210093China Department of Environmental Health Sciences Yale Center on Climate Change and HealthYale School of Public HealthNew HavenCT 06510USA

Despite the existence of many interventions to mitigate or adapt to the health effects of climate change,their effectiveness remains ***,we introduce the Comprehensive Evaluation Framework for Intervention on Health Effects of Ambient Temperature to evaluate study designs and effects of intervention *** framework comprises three types of interventions:proactive,indirect,and direct,and four categories of indicators:classification,methods,scope,and *** trialed the framework by an evaluation of existing intervention *** evaluation revealed that each intervention has its own applicable characteristics in terms of effectiveness,feasibility,and generalizability *** expanded the framework's potential by offering a list of intervention recommendations in different *** applications are then explored to establish models of the relationship between study designs and intervention effects,facilitating effective interventions to address the health effects of ambient temperature under climate change.

关键词： Intervention Evaluation framework Ambient temperature Climate change Human health Evaluation practice