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Identifying the Fate of Dissolved Organic Matter in Wastewater Treatment Plant Effluent-Dominated Urban River Based on Fluorescent Flux Budget Approach

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SSRN 2024年

作者： Fu, Xiaowei Ju, Mengdie Wu, Ruibin Jia, Zichen Yin, Hailong Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources Tongji University 200092 China State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China

Effluent organic matter from wastewater treatment plants (WWTPs) is an important source of dissolved organic matter (DOM) in urban rivers worldwide. Identifying the fate of DOM in urban river is crucial for water quality management. To address this concern, a fluorescent flux budget approach was conducted to probe the fate of DOM in WWTP effluent-dominated urban river, in combination with on-site measurement and fluorescence components interpretation. An urban river receiving two WWTPs effluents in Hefei City, China was chosen as the study site, where a spatially longitudinal measurement of river hydrology and water quality were performed. The findings revealed the presence of three humic-like components (C1, C2, C4) and one protein-like component (C3) in this investigated river, among which C2 and C4 were indicative of anthropogenic influences, mainly associated with treated effluents. For each fluorescent component, the WWTP effluent contributed over 80% of the total fluorescent dissolved organic matter (FDOM) input in this river. Using the developed FDOM flux budget model, it was revealed that the C1 and C3 were almost conserved within the waterbody, while the C2 and C4 experienced losses due to biogeochemical reactions within the water body. The degradation rates of C2 and C4 in the WWTP effluent-dominated urban river were estimated to be 0.109–0.174 d-1 and 0.096–0.320 d-1, respectively. Spatial heterogeneity of reaction rates for C2 and C4 were associated with both in-stream photodegradation and photodegradation-induced biological degradation of treated effluent. Our on-site study highlights that after treated effluent is released into the receiving waterbody, the FDOM would undergo loss from the waters particularly for anthropogenic humic-like substances C2 and C4. Additionally, the quantified FDOM degradation rate in actual urban water environment provides significance for river water quality management, especially when using DOM as the surrogate indicator o

关键词： Rivers

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Insight into the synergistic mechanism of sonolysis and sono-induced BiFeO3 nanorods piezocatalysis in atenolol degradation: Ultrasonic parameters, ROS and degradation pathways

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Chemosphere 2023年 335卷

作者： Hong, Mingjian Yao, Juanjuan Rao, Fanghui Chen, Zihan Gao, Naiyun Zhang, Zhi Jiang, Wenchao Key Laboratory of Three Gorges Reservoir Region's Eco-Environment Ministry of Education Chongqing University Chongqing400045 China State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai200092 China

Herein, BiFeO3 nanorods (BFO NRs) was synthesized as the piezoelectric catalyst. The synergistic mechanism of sonolysis and sono-induced BFO-piezocatalysis in atenolol degradation was revealed and the effect of ultrasonic parameters on it was investigated for the first time. The results indicated that 100 kHz was the optimal frequency for the sonolytic and sono-piezocatalytic degradation of atenolol in ultrasound/BFO nanorods (US/BFO NRs) system, with the highest synergistic coefficient of 3.43. The piezoelectric potential differences of BFO NRs by COMSOL Multiphysics simulations further distinguishing that the impact of cavitation shock wave and ultrasonic vibration from sonochemistry reaction (i.e., 2.48, −2.48 and 6.60 V versus 0.008, −0.008 and 0.02 V under tensile, compressive and shear stress at 100 kHz). The latter piezoelectric potentials were insufficient for reactive-oxygen-species (ROS) generation, while the former contributed to 53.93% •OH yield in US/BFO NRs system. Sono-piezocatalysis was found more sensitive to ultrasonic power density than sonolysis. The quenching experiments and ESR tests indicated that the ROS contribution in atenolol degradation followed the order of •OH > 1O2 > h+ > O2•- in US/BFO NRs system and 1O2 generation is exclusively dissolved-oxygen dependent. Four degradation pathways for atenolol in US/BFO NRs system were proposed via products identification and DFT calculation. Toxicity assessment by ECOSAR suggested the toxicity of the degradation products could be controlled. © 2023 Elsevier Ltd

关键词： Bismuth compounds

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Pervasive influence of heavy metals on metabolic pathways is potentially relieved by hesperidin to enhance the phytoremediation efficiency of Bassia scoparia

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environmental Science and pollution Research 2024年第23期31卷 34526-34549页

作者： Hussain, Mazhar Hafeez, Arslan Rizwan, Muhammad Rasheed, Rizwan Seleiman, Mahmoud F. Ashraf, Muhammad Arslan Ali, Shafaqat Farooq, Umer Nafees, Muhammad Department of Botany Government College University Faisalabad Faisalabad38000 Pakistan Department of Environmental Sciences Government College University Faisalabad Faisalabad38000 Pakistan Department of Plant Production College of Food and Agriculture Sciences King Saud University P.O. Box 2460 Riyadh11451 Saudi Arabia Department of Biological Sciences and Technology China Medical University Taichung40402 Taiwan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing21023 China

Hesperidin (HSP), a flavonoid, is a potent antioxidant, metal chelator, mediator of signaling pathways, and regulator of metal uptake in plants. The study examined the ameliorative effects of HSP (100 μM) on Bassia scoparia grown under excessive levels of heavy metals (zinc (500 mg kg−1), copper (400 mg kg−1), cadmium (100 mg kg−1), and chromium (100 mg kg−1)). The study clarifies the underlying mechanisms by which HSP lessens metabolic mayhem to enhance metal stress tolerance and phytoremediation efficiency of Bassia scoparia. Plants manifested diminished growth because of a drop in chlorophyll content and nutrient acquisition, along with exacerbated deterioration of cellular membranes reflected in elevated reactive oxygen species (ROS) production, lipid peroxidation, and relative membrane permeability. Besides the colossal production of cytotoxic methylglyoxal, the activity of lipoxygenase was also higher in plants under metal toxicity. Conversely, hesperidin suppressed the production of cytotoxic ROS and methylglyoxal. Hesperidin improved oxidative defense that protected membrane integrity. Hesperidin caused a more significant accumulation of osmolytes, non-protein thiols, and phytochelatins, thereby rendering metal ions non-toxic. Hydrogen sulfide and nitric oxide endogenous levels were intricately maintained higher in plants treated with HSP. Hesperidin increased metal accumulation in Bassia scoparia and thereby had the potential to promote the reclamation of metal-contaminated soils. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Detoxification

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Eco-districts in France:What tools to ensure goals achievement?

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Science China Earth Sciences 2020年第6期63卷 865-874页

作者： Kathleen BOQUET Charline FROITIER Jinhui LI Kaihua XU Xianlai ZENG State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Higher Institute for Environmental Engineering and Management MINES ParisTechParis Cedex 06France GEM Company Limited Shenzhen 518101China

Globally,to build cities and communities more inclusive,safe,resilient and sustainable is one of the most important sustainable development ***-districts in cities emerged as an answer to current global environmental concerns and have been developed in France since the *** objective of this work is to gather operational feedback from sustainable neighborhood projects owners to better understand the key barriers of such projects and how to overcome them.A case study of the eco-district Les Tanneries,Lingolsheim showed that the carbon footprint of each inhabitant annually amounted to 4 tons CO2 equivalent,more than half of the French *** for improvements were clearly identified regarding transports and food carbon *** for energy consumption,social diversity and density reached the level of the eco-districts average.A governance review pointed out some superior practices such as the formalization of a specification requirements handbook,a competition between project management teams,and the use of neighborhood sustainability assessment tools to measure and track changes in *** validated tools and obtained results can be useful in building sustainable cities and even China’s ecological civilization.

关键词： Geography and environment City management Eco-district Sustainability Assessment France

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Influence of leachate microenvironment on the occurrence of phthalate esters in landfills

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Chemosphere 2023年 343卷 140278页

作者： Zhang, Yifan Gao, Yiman Xi, Beidou Yuan, Ying Tan, Wenbing College of Water Sciences Beijing Normal University Beijing100875 China State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing100012 China

Phthalate esters (PAEs) are added to various products as plasticizers. Plastic waste containing PAEs enters landfills as they age with use. However, the influence of microenvironmental changes on the occurrence of PAEs during landfill stabilization is still unknown. In this study, we evaluated the relationship between the physical and chemical properties of leachate, the structure of bacterial communities and the chemical structure of dissolved organic matter (DOM), and the occurrence of PAEs and the mechanism underlying their responses to changes. Landfill leachate in different stabilization states had high Cl− and NH4+ contents and its metal element (Cr, Pb, and Zn) contents generally decreased with the increase in landfill ages. Proteobacteria, Bacteroidetes, and Firmicutes were important phyla and had an average relative abundance of 68.63%. The lignin/carboxylate-rich alicyclic molecule structure was the main component of DOM (56%–64%). Of the 6-priority controlled PAEs in leachate, di-n-butyl phthalate was the most abundant (1046 μg L−1), while butyl phthalate was not detected. The results showed that pH, the relative abundance of Chloroflexi, and the value of SUVA254 can directly influence the occurrence of PAEs in leachate. The positive and negative effects vary depending on the PAE content and molecular weight. DBP and DEHP have higher environmental risks in the aquatic system. These results are intended to provide a scientific basis for the evolutionary characterization of the microenvironment in complex environmental systems and the control of novel contaminants, such as PAEs. © 2023 Elsevier Ltd

关键词： Bacteria

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Insights into the Role of Vocs Properties on Desorption Behaviors of Two Porous Polymeric Resins

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SSRN 2023年

作者： Liu, Huijuan Yu, Yansong Long, Chao School of Eco-Environment Hebei University Baoding071002 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Desorption is a critical process in the recovery or post-treatment of adsorbents saturated with volatile organic compounds (VOCs). In this study, the thermal desorption behaviors for eight VOCs on hypercrosslinked polymeric resin (HPR) and macroporous polymeric resin (MPR) were investigated through isothermal desorption and temperature programmed desorption (TPD). Compared with MPR, HPR with more micropores exhibited a lower desorption rate constant, lower desorption efficiency and higher desorption activation energy due to the strong binding energy generated between VOCs molecules and narrow micropores. As the polarizability of VOCs increased, the desorption rate constants on two porous polymeric resins decreased, while the desorption activation energy showed an incremental trend. Excellent linear correlations were observed between VOC polarizability and desorption rate constants (R2=0.957 for HPR and R2=0.940 for MPR) as well as between VOC polarizability and desorption activation energy (R2=0.981 for HPR and R2=0.969 for MPR). Furthermore, a polyparameter linear free energy relationship (PP-LFER) was developed to explore the influences of intermolecular interactions on desorption behaviors of VOCs on porous polymeric resins. The results indicated that the dispersive interaction, which is directly related to polarizability of VOCs, was the primary factor influencing the desorption activation energy of VOCs on porous polymeric resins. The find from this study helps evaluate fleetly and availably the desorption properties of VOCs based on their polarizability. © 2023, The Authors. All rights reserved.

关键词： Volatile organic compounds

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Diffusion of "Dual Carbon" Policies Among Chinese Cities: A Network Evolution Analysis

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SSRN 2024年

作者： Wang, Jiaming Jia, Ling Wang, Yiyi Wang, Peng Huang, Lei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Faculty of Civil Engineering and Mechanics Jiangsu University Zhenjiang212013 China

Numerous regions across China have introduced "dual carbon" policies, yet the response of cities to these policies remains unclear. In this study, we used emission data from 271 Chinese cities for the years 2010, 2015, and 2020 to construct a complex network of urban emissions with a modified gravity model. By modeling the strategic interaction behavior of unban-level response to the policy, we simulated the diffusion process of the "dual carbon" policy among cities through network evolution analysis. It was found that China's carbon emission network primarily comprises four urban agglomerations: Beijing-Tianjin-Hebei, Yangtze River Delta, Pearl River Delta, and Sichuan-Chongqing. The "dual carbon" policy exhibits a network diffusion effect, with cost-effectiveness serve as a critical factor influencing its spread. And the current low carbon price in China does not provide adequate positive incentives for carbon reduction. Additionally, through counterfactual scenario analysis and an exploration of network structural characteristics, we highlighted the vital role of core cities within urban agglomerations in facilitating efficient policy diffusion. This study offers valuable insights for the selection of pilot cities and the sustainable regional dissemination of policies, providing guidance for more effective policy implementation. © 2024, The Authors. All rights reserved.

关键词： Complex networks

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Long-Term and Multi-Scale Assessment of Enhancing Mechanisms of Methanogenesis in Magnetite Nanoparticle-Mediated Anaerobic Digestion: From Digester Performance, Biochemical Parameters to Microbial Communities

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SSRN 2024年

作者： Li, Jibin Sun, Desheng Wu, Siqi Yang, Wenlan Xiong, Lei Zhang, Weiming Hua, Ming Pan, Bingcai State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of the Environmental Science and Engineering Yangzhou University Yangzhou225000 China

Magnetite nanoparticles (Fe3O4-NPs) have been demonstrated to be involved in direct interspecies electron transfer between syntrophic bacteria, yet a comprehensive assessment of the ability of Fe3O4-NPs to cope with process instability and volatile fatty acids (VFAs) accumulation in scaled-up anaerobic reactors is still lacking. Here, we investigated the start-up characteristics of an expanded granular sludge bed (EGSB) with Fe3O4-NPs as an adjuvant at high organic loading rate (OLR). The results showed that methane production rate of R1 (with Fe3O4-NPs) was approximately 1.65 folds of R0 (control), and effluent COD removal efficiency was maintained at approximately 98.32% upon 20 kg COD/(m3·d) OLR. The components of volatile fatty acids are acetate and propionate, and the rapid scavenging of propionate accumulation was the difference between R1 and the control. The INT-ETS activity of R1 was consistently higher than that of R0 and R2, and the electron transfer efficiencies increased by 68.78% and 131.44%, respectively. Meanwhile, the CV curve analysis showed that the current of R1 was 40% higher than R3 (temporary addition of Fe3O4-NPs ), indicating that multiple electron transfer modes might coexist. High-throughput analysis further revealed that it was difficult to reverse the progressive deterioration of system performance with increasing OLR by simply reconfiguring bacterial community structure and abundance, demonstrating that the Fe3O4-NPs-mediated DIET pathway is a prerequisite for establishing multiple electron transfer systems. This study provides a long-term and multi-scale assessment of the gaining effect of Fe3O4-NPs in anaerobic digestion scale-up devices, and provides technical support for their practical engineering applications. © 2024, The Authors. All rights reserved.

关键词： Magnetite

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Different response of bacterial community to the changes of nutrients and pollutants in sediments from an urban river network

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Frontiers of environmental Science & Engineering 2020年第2期14卷 161-172页

作者： Fang Zhang Hao Zhang Ying Yuan Dun Liu Chenyu Zhu Di Zheng Guanghe Li Yuquan Wei Dan Sun School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua UniversityBeijing 100084China College of Resource and Environmental Science China Agricultural UniversityBeijing 100193China Ocean College Zhejiang UniversityZhoushan 316021China

Microbial communities in sediment are an important indicator linking to environmental pollution in urban river ***,how the diversity and structure of bacterial communities in sediments from an urban river network respond to different environmental factors has not been well *** goal of this study was to understand the patterns of bacterial communities in sediments from a highly dense urbanized river network in the lower Yangtze River Delta by Illumina MiSeq *** correlations between bacterial communities,the environmental gradient and geographical distance were analyzed by redundancy analysis(RDA)and network *** diversity and richness of bacterial community in sediments increased from upstream to downstream consistently with the accumulation of nutrient in the urban river *** community composition and structure showed obvious spatial changes,leading to two distinct groups,which were significantly related to the characteristics of nutrient and heavy metal in *** substance,available nitrogen,available phosphorus,Zn,Cu,Hg and As were selected as the key environmental factors shaping the bacterial community in sediments based on *** co-occurrence patterns of bacterial networks showed that positive interaction between bacterial communities increased but the connectivity among bacterial genera and stability of sediment ecosystem reduced under a higher content of nutrient and heavy metal in *** sensitive and ubiquitous taxa with an overproportional response to key environmental factors were detected as indicator species,which provided a novel method for the prediction of the pollution risk of sediment in an urban river network.

关键词： Sediment Urban river network Bacterial community Network analysis Indicator species

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Nitrate removal from aqueous solutions by magnetic cationic hydrogel:Effect of electrostatic adsorption and mechanism

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Journal of environmental Sciences 2020年第5期32卷 177-188页

作者： Junyi Li Shuoxun Dong Yili Wang Xiaomin Dou Haotian Hao College of Environmental Science and Engineering Beijing Key Lab for Source Control Technology of Water PollutionBeijing Forestry UniversityBeijing 100083China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China

Excessive nitrate(NO3-)is among the most problematic surface water and groundwater *** this study,a type of magnetic cationic hydrogel(MCH)is employed for NO3-adsorption and well characterized *** adsorption capacity is considerably pHdependent and achieves the optimal adsorption(maximum NO3--adsorption capacity is95.88±1.24 mg/g)when the pH level is *** fitting result using the homogeneous surface diffusion model indicates that the surface/film diffusion controls the adsorption rate,and NO3-approaches the center of MCH particles within 30 *** diffusion coefficient(Ds)and external mass transfer coefficient(kF)in the liquid phase are1.15×10-6 cm2/min and 4.5×10-6 cm/min,*** MCH is employed to treat surface water that contains 10 mg/L of NO3-,and it is found that the optimal magnetic separation time is 1.6 *** high-efficiency mass transfer and magnetic separation of MCH during the adsorption-regeneration process favors its application in surface water ***,the study of the mechanism involved reveals that both-N+(CH3)3 groups and NO3-are convoluted in adsorption via electrostatic *** is further found that ion exchange between NO3-and chlorine occurs.

关键词： Adsorption Nitrate removal Low concentration Electrical stern layer Magnetic cationic hydrogel

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