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Nitrated and parent PAHs in the surface water of Lake Taihu,China:Occurrence,distribution,source,and human health risk assessment

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Journal of Environmental Sciences 2021年第4期33卷 159-169页

作者： Jijie Kong Yuxuan Dai Mengshu Han Huan He Jiapeng Hu Junyi Zhang Junzhe Shi Qiming Xian Shaogui Yang Cheng Sun The State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Environment Nanjing Normal UniversityNanjing 210023China College of Ecological and Resource Engineering Fujian Provincial Key laboratory of Eco-Industrial Green TechnologyWuyi UniversityWuyishan 354300China Wuxi Environmental Monitoring Centre Wuxi 214121China

Nitrated polycyclic aromatic hydrocarbons(NPAHs)have toxic potentials that are higher than those of their corresponding parent polycyclic aromatic hydrocarbons(PAHs)and thus have received increasing attention in recent *** this study,the occurrence,distribution,source,and human health risk assessment of 15 NPAHs and 16 PAHs were investigated in the surface water from 20 sampling sites of Lake Taihu during the dry,normal,and flood seasons of *** PAH concentrations ranged from 255 to 7298 ng/L and the NPAH concentrations ranged from not-detected(ND)to 212 ng/*** the target analytes,2-nitrofluorene(2-n Flu)was the predominant NPAH,with a detection frequency ranging from 85%to 90%and a maximum concentration of 56.2 ng/*** three-ringed and four-ringed NPAHs and PAHs comprised the majority of the detected *** terms of seasonal variation,the highest levels of the NPAHs and PAHs were in the dry season and flood season,*** ratio analysis indicated that the prime source of NPAHs was direct combustion,whereas in the case of PAHs the contribution was predominantly from a mixed pattern including pollution from unburned petroleum and petroleum *** human health risk of NPAHs and PAHs was evaluated using a lifetime carcinogenic risk assessment *** carcinogenic risk level of the targets ranged from 2.09×10^(-7)to 5.75×10^(-5)and some surface water samples posed a potential health risk.

关键词： Nitrated polycyclic aromatic hydrocarbons Surface water Occurrence Seasonal variation Human health risk assessment

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Heavy-Duty Diesel Trucks on Highways in Beijing-Tianjin-Hebei: Constant Challenge in pollution control

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SSRN 2024年

作者： Han, Yingying Wang, Chang Zhu, Yixue Wu, Rui Xue, Yifeng Zhang, Xiang Wang, Weiwei Cui, Yangyang Han, Jinxiu Shi, Zongbo Wang, Xiuyan Jin, Taosheng Tianjin Key Laboratory of Urban Transport Emission Research State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control College of Environmental Science and Engineering Nankai University Tianjin300350 China Advanced Institute of Natural Sciences Beijing Normal University Zhuhai519087 China School of Environment Beijing Normal University Beijing100875 China Laboratory of Transport Pollution Control and Monitoring Technology Transport Planning and Research Institute Ministry of Transport Beijing100028 China National Engineering Research Center of Urban Environmental Pollution Control Beijing Municipal Research Institute of Eco-Environmental Protection Beijing100037 China Sustainable Development Research Institute for Economy and Society of Beijing School of Management and Economics Beijing Institute of Technology Beijing100081 China School of Geography Earth and Environmental Sciences The University of Birmingham BirminghamB15 2TT United Kingdom

Heavy-duty diesel trucks (HDDTs) contributed significantly to on-road air pollution. This study measured the traffic flow of HDDTs on seven national highways in Beijing-Tianjin-Hebei (BTH) region to estimate air pollutants of HDDTs from 2016 to 2020. The emission factors are corrected by the International Vehicle Emissions (IVE) model, traffic flow, and road length. Compared with 2016, traffic flow in 2019 increased by 41%, carbon monoxide (CO) and nitrogen oxide (NOx) emissions increased by 0.3% and 4%, while hydrocarbons (HC) and particulate matter (PM) emissions decreased by about 26% and 18%. The COVID-19 lockdowns did not cause significant annual changes in traffic flow and pollution emissions in 2020 compared with 2019, but there were substantial monthly variations in pollutant emissions. Our study showed that although control measures were implemented during the "Thirteenth Five-Year Plan" period, the substantial increase in regional HDDT transport posed a continuing challenge in reducing road traffic emissions. © 2024, The Authors. All rights reserved.

关键词： COVID-19

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Photodegradation fate of different dissociation species of antidepressant paroxetine and the effects of metal ion Mg2+: Theoretical basis for direct and indirect photolysis

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Chemosphere 2023年第1期335卷

作者： Lu, Ying Wang, Se Shen, Yifan Hao, Ce School of Environmental Science and Engineering Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing University of Information Science and Technology Nanjing210044 China State Key Laboratory of Fine Chemicals Dalian University of Technology Liaoning Dalian116024 China

Paroxetine (abbreviated as PXT) has been widely used as one of the standard antidepressants for the treatment of depression. PXT has been detected in the aqueous environment. However, the photodegradation mechanism of PXT remains unclear. The present study aimed to use density functional theory and time-dependent density functional theory to study the photodegradation process of two dissociated forms of PXT in water. The main mechanisms include direct and indirect photodegradation via reaction with ·OH and 1O2 and photodegradation mediated by the metal ion Mg2+. Based on the calculations, PXT and PXT-Mg2+ complexes in water are photodegraded mainly indirectly and directly. It was found that PXT and PXT-Mg2+ complexes were photodegraded by H-abstraction, OH-addition and F-substitution. The main reaction of PXT indirect photolysis is OH-addition reaction, while the main reaction of PXT0-Mg2+ complex is H-abstraction. All the reaction pathways of H-abstraction, OH-addition and F-substitution are exothermic. PXT0 reacts more readily with ·OH or 1O2 in water than PXT+. However, the higher activation energy of PXT with 1O2 indicates that the 1O2 reaction plays a minor role in the photodegradation pathway. The direct photolysis process of PXT includes ether bond cleavage, defluorination, and dioxolane ring-opening reaction. In the PXT-Mg2+ complex, the direct photolysis process occurs via a dioxolane ring opening. Additionally, Mg2+ in water has a dual effect on the direct and indirect photolysis of PXT. In other words, Mg2+ can inhibit or promote their photolytic reactions. Overall, PXT in natural water mainly undergo direct and indirect photolysis reactions with ·OH. The main products include direct photodegradation products, hydroxyl addition products and F-substitution products. These findings provide critical information for predicting the environmental behavior and transformation of antidepressants. © 2023

关键词： Density functional theory

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Achievements,challenges and global implications of China’s carbon neutral pledge

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Frontiers of Environmental Science & Engineering 2022年第8期16卷 285-288页

作者： Hong Yang Xianjin Huang Jianlin Hu Julian R.Thompson Roger J.Flower Department of Geography and Environmental Science University of ReadingReading RG66ABUK School of Geography and Ocean Science Nanjing UniversityNanjing 210023China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC)School of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China Department of Geography University College LondonLondon WC1E 6BTUK

China has been committed to achieving carbon neutrality by ***’s pledge of carbon neutrality will play an essential role in galvanising global climate action,which has been largely deferred by the Covid-19 ***’s carbon neutrality could reduce global warming by approximately 0.2–0.3°C and save around 1.8 million people from premature death due to air *** with domestic benefits,China’s pledge of carbon neutrality is a“game-changer”for global climate action and can inspire other large carbon emitters to contribute actively to mitigate carbon emissions,particularly countries along the Belt and Road Initiative(BRI)*** order to achieve carbon neutrality by 2060,it is necessary to decarbonise all sectors in China,including energy,industry,transportation,construction,and ***,this transition will be very challenging,because major technological breakthroughs and large-scale investments are *** policies and implementation plans are essential,including sustainable demand,decarbonizing electricity,electrification,fuel switching,and negative *** particular,if China can peak carbon emissions earlier,it can lower the costs of the carbon neutral transition and make it easier to do so over a longer time ***’s pledge of carbon neutrality by 2060 and recent pledges at the 26th UN Climate Change Conference of the Parties(COP26)are significant contributions and critical steps for global climate ***,countries worldwide need to achieve carbon neutrality to keep the global temperature from growing beyond the level that will cause catastrophic damages globally.

关键词： Carbon neutrality Carbon peak Renewable energy Negative emission Carbon capture Utilisation and storage Nature-based solution

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Impact of Physico-Chemical Heterogeneity on the Re-Active transport Processes of Chromium (Ⅵ) in Aqueous System

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SSRN 2024年

作者： Liu, Yi Yi, Shuping Deng, Yi Huang, Pizhu Tian, Zhiren School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Shenzhen China China National Environmental Monitoring Centre Beijing China

Aiming at the influence mechanisms of the physical and chemical heter-ogeneity on the transport process of Cr(Ⅵ) in an aqueous system, this study conducted a set of experiments of Cr(Ⅵ) transport to analyze the effects of physical heterogeneity and chemical heterogeneity by considering preferential paths and reductive mineral lenses, respectively. Our main findings are: 1) Physico-chemical heterogeneity plays a crucial role in determining the transport and final fate of Cr(VI) in aqueous systems. Physical heterogeneity controls the flow paths and advection rates, while chemical heterogeneity re-tards the transport by the heterogeneous adsorption and reduction of Cr(VI) within those pathways. 2) The influence of the preferential path is twofold. It increases the convective intensity of Cr (VI) and makes the transport more spatially uneven, which subsequently affects the contact and reaction process between Cr(VI) and reactive minerals in an aqueous system. 3) Chemical het-erogeneity retards the transport of Cr(VI) in a dynamic process, which is largely depended both on the runoff and the geochemical conditions of the aqueous system. The pH value plays a key role in this regard with the runoff conditions as the rate-limiting step. At high pH values, the chemical hetero-geneity impacts significantly the transport of Cr(VI) duo to the reduction of Cr(VI) is limited to the vicinity of pyrite, retardation of Cr(VI) is mainly de-pended on adsorption However, at low pH values, the reduction of Cr(VI) reacts uniformly in a wide zone formed by pyrite dissolution, which makes the retardation occurs independently of the adsorption rate of Cr(VI). Conse-quently, the effect of chemical heterogeneity is greatly reduced in this case. Insights gained here bridge the gaps between the laboratory observations and the field applications and advance predictive understanding of reactive transport processes in the naturally heterogeneous systems. © 2024, The Authors. All rights reserved.

关键词： Runoff

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Enhancement of Nitrogen Removal in Coupling Anammox and Damo Via Fe-Modified Granular Activated Carbon

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SSRN 2023年

作者： Xue, Yiting Liu, Xinying Dang, Yan Shi, Tianjing Sun, Dezhi Beijing Key Laboratory for Source Control Technology of Water Pollution Engineering Research Center for Water Pollution Source Control and Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Environmental Monitoring Station Ningdong Energy Chemical Industry Base Yinchuan751400 China

Anaerobic ammonium oxidation (Anammox) coupling to Denitrifying anaerobic methane oxidation (DAMO) is an attractive technology to simultaneously remove nitrogen and mitigate methane emissions from wastewater, however, its nitrogen removal rate is usually limited due to the low methane mass transfer efficiency, low metabolic activity and slow growth rate of functional microorganisms. In this study, GAC and Fe modified GAC (Fe-GAC) were added into Anammox-DAMO process to investigate their effects on nitrogen removal rates and then reveal the mechanism. The results showed that after 80-day experiments, the total nitrogen removal rate was slightly improved in the presence of GAC (3.94 mg·L-1·d-1), while it reached high as 16.66 mg·L-1·d-1 in the presence of Fe-GAC, which was ca.17 times that of non-amended control group (0.96 mg·L-1·d-1). The addition of Fe-GAC stimulated the secretion of extracellular polymeric substance (EPS), improved the electron transfer capability and promoted the production of Cytochrome C. Besides, the key functional enzyme activities (HZS, HDH and NAR) were highest in the Fe-GAC group, which were approximately 1.06~1.56 times higher than those of GAC-amended and blank groups. Microbial community analysis showed that the abundance of the DAMO archaea (Candidatus Methanoperedens) and Anammox bacteria (Candidatus Brocadia) were remarkably increased with the addition of Fe-GAC. Functional genes associated with nitrogen removal and methane oxidation in Fe-GAC system were up-regulated. This study provides a promising strategy for high rate of nitrogen removal upon Anammox-DAMO process. © 2023, The Authors. All rights reserved.

关键词： Nitrogen removal

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Effects of Coix Seed on Physicochemical, Structural and Digestive Properties of Wheat Dough and Noodle Quality

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SSRN 2024年

作者： Wu, Yingmei Xu, Longquan Yu, Yunliu Wang, Chengli Pu, Dingfang School of Public Health The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education Guizhou Medical University Guiyang550025 China Technology Center China Tobacco Guizhou Industrial Co. Ltd. Guiyang550000 China

The effect of coix seed flour (0–25%) on the physicochemical, structural and digestive properties of wheat dough and noodles quality was investigated. Ciox seed flour can help to improve the elasticity of dough due to protein polymerization and the enhancement of network structure. This is consistent with the pasting characteristics and secondary structure analysis results of the dough. The setback value(SB)raised to 1095cP and the β-sheet structure in the gluten protein increased at the expense of the α-helical structure with increasing coix seed flour. The texture characteristics and cooking property data revealed that 20% coix seed flour addition achieving the highest sensory score can improve the springiness and chewiness of noodles. When the addition of coix seed was 25%, HI and EGI decreased by 18% and 15.3%, respectively. Correlation analysis indicated that the pasting characteristic parameters play an important role in evaluation on noodles quality. © 2024, The Authors. All rights reserved.

关键词： Proteins

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Exceptional kinetics of heavy metals adsorption from wastewater through tannic-mediated nano-hydrous zirconium oxide (HZO) encapsulated within mesoporous carbon

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Journal of Hazardous Materials 2025年 494卷 138576页

作者： Qiu, Hui Chen, Shuxin Zhang, Jiakang Zhang, Qingrui 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 State Key Laboratory of Metastable Materials Science and Technology Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse Yanshan University Qinhuangdao066004 China

Conventional immobilization techniques for nanosized metal oxides frequently result in nanoparticle aggregation within the carrier matrix pores, causing severe pore blockage and compromised mass transfer efficiency. A novel hydrous zirconium oxide-based nanocomposite (denoted as ZrTA@CMK-3) was successfully synthesized by leveraging ordered mesoporous carbon (CMK-3) as a structural scaffold, pre-functionalized with a highly negatively charged tannic acid-zirconium (TA-Zr) macromolecular network. Adsorption kinetics evaluation revealed that 85.5 % of the Pb(II) adsorption capacity was achieved within 1 min, with complete equilibrium reached in 5 min, and a kinetic rate constant (k2) of 0.0537 g‧mg−1‧min−1, which is up to 100 times higher than that of other adsorbents. The strongly negatively charged TA-Zr network synergizes with CMK-3’s ordered meso-structure to enable accelerated heavy metal ion transport through the pore channels, achieving outstanding Pb(II) adsorption kinetics. X-ray photoelectron spectroscopy analyses indicated that the dominant adsorption mechanism of ZrTA@CMK-3 for Pb(II) is attributed to the inner-sphere complexation between Zr−O−H groups and Pb(II) ions. Fixed-bed column test demonstrated that ZrTA@CMK-3 column sustained treatment capacity of 2050 bed volumes (BV) for simulated industrial wastewater (pH 6.0), maintaining effluent Pb(II) concentrations TA@CMK-3 enable significant reductions in hydraulic retention requirements while maintaining operational efficiency, positioning this composite as a promising solution for cost-effective heavy metal removal in industrial wastewater treatment systems. © 2025 Elsevier B.V.

关键词： Mesoporous materials

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Ensemble source apportionment of particulate matter and volatile organic compounds and quantifying ensemble source impacts on ozone

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Journal of Environmental Sciences (China) 2025年 157卷 534-545页

作者： Liang, Weiqing Wang, Zhenyu Zhao, Dongheng Liu, Jinxing Ma, Tong Feng, Yinchang Shi, Guoliang State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Tianjin Key Laboratory of Urban Transport Emission Research College of Environmental Science and Engineering Nankai University Tianjin300350 China College of Environmental Science and Engineering Nankai University Tianjin300350 China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin Environmental Monitoring Technology Enterprise Key Laboratory School of Precision Instrument and Optoelectronics Engineering Tianjin University Tianjin300072 China Co. Ltd. Tianjin300072 China Chinese Research Academy of Environmental Sciences Beijing100012 China

Serious fine particulate matter (PM2.5) pollution and rapidly increasing of ground-level ozone (O3) concentrations are concern issues in China. To achieve the comprehensive control of PM2.5-O3 composite air pollution, exploring the common sources of PM2.5 and VOCs is essential. However, previous researches most carried out either PM2.5 or VOCs source appointment. In this study, we applied the ensemble source apportionment method to explore the impacts of common sources on PM2.5-VOCs. Subsequently, we obtained the ensemble source impacts on O3 combining the extracted VOCs source profile and ozone formation potential. We found that the focus of environmental management and source control should be varied accordingly for different pollutants. Vehicle emission was the largest contributor (41 %) to PM2.5-VOCs, while industrial emission was the main common source (51 %) to O3. The result showed that the O3 production rate is not only related to the VOCs emission, but also to the reactivity of VOCs. In addition, sensitivity tests revealed that temperature was the main factor affecting O3 formation. The study provides a framework to explore the common sources impact on PM2.5 and VOCs, which is benefit to address both PM2.5 and O3 mitigations. © 2024

关键词： Emission control

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Characterization of dissolved organic matter changes during electrolysis of biochemical effluent in printing and dyeing

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Zhongguo Huanjing Kexue/China Environmental Science 2022年第12期42卷 5650-5657页

作者： Zheng, Rui-Hao Huang, Yan Liu, Zi-Feng Wang, Jia-De College of Environment Zhejiang University of Technoloy Hangzhou310014 China Zhejiang Provincial Key Laboratory of Industrial Pollution Microbial Control Technology Hangzhou310014 China Deqing Ecological Environment Monitoring Station Deqing313200 China

Fluorescence excitation emission matrix (EEM), combined with ultraviolet-visible absorption spectroscopy (UV-vis), infrared spectroscopy (IR) and gas chromatography-mass spectrometry (GC-MS), were employed to identify the structure and composition of dissolved organic matter (DOM) from the electrolysis process of printing and dyeing biochemical effluent, to reveal the changes in macroscopic water quality indicators COD and BOD. The three-dimensional fluorescence spectroscopy PARAFAC analysis showed that there were three significant fluorescence peaks of tyrosine (C1), tryptophan (C2) and humic acid (YC3) in printing and dyeing biochemical effluent. At a current density of 15mA/cm2, after a certain period of electrolysis (e.g. 30min), the original fluorescence intensity began to gradually weaken, the maximum fluorescence intensity (Fmax) of C1 and C2 fractions remained the same, and DC3 tryptophan component appeared and reduced Fmax. The B/C ratio of the wastewater increased from 0.27 to 0.42, and the C=C, C=O, C-N and C-O-C structures of the printing and dyeing biochemical tailwater DOM were degraded and the corresponding organic compounds such as olefins, ketones, amines, alcohols, benzenes, halogenated hydrocarbons and esters in the raw water were gradually degraded into small molecule organic acids, alkyl esters, alkanes and other by-products, which is the essential reason for the transformation of fluorophores and the improvement of biochemical properties. The three-dimensional fluorescence visualizes the characteristic spectra of the DOM composition of the electrolysis process, which supports the scientific evaluation of the electrolysis technology and the subsequent traceability of the printing and dyeing biochemical effluent. © 2022 Chinese Society for Environmental Sciences. All rights reserved.

关键词： Effluents

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