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Nanoscale zero valent iron-activated persulfate coupled with Fenton oxidation process for typical pharmaceuticals and personal care products degradation

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Separation and Purification Technology 2020年 239卷

作者： Junxue Wu Bin Wang Giovanni Cagnetta Jun Huang Yujue Wang Shubo Deng Gang Yu School of Environment Beijing Key Laboratory for Emerging Organic Contaminants Control State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) Tsinghua University Beijing 100084 China Institute of Plant and Environmental Protection Beijing Academy of Agriculture and Forestry Science Beijing 100089 China

In this study, a two-staged nanoscale zero valent iron-activated persulfate coupled with Fenton (nZVI-PS-Fenton) oxidation process is applied to remove typical pharmaceuticals and personal care products (PPCPs) from water. Due to the partial substitution of PS by cheaper H 2 O 2 , the main advantage of the combined treatment is to reduce the cost of oxidation reagent and reduce sulfate release in water. Experiment results indicated that sulfamethazine (50 mg L −1 ) is degraded up to 96% within 30 min using 2 mM nZVI, 1 mM PS and 0.5 mM H 2 O 2 . Thanks to the acidifying effect of persulfate addition for degradation of PPCPs and reduction of pH value in the first stage, the Fenton reaction could further finalize sulfamethazine degradation independently from initial pH. The degradation of PPCPs obeyed pseudo-first-order reaction kinetics. The effect of organic and inorganic radical scavengers naturally present in water was studied: results indicated that they actually have an inhibition effect, but this is perceivable at rather high concentrations. Nine typical PPCPs ( i.e. , bisphenol A, indomethacin, norfloxacin, tetracycline, paracetamol, carbamazepine, phenacetin, sulfamethoxazole and sulfamethazine) were significantly degraded (77–100%), suggesting that the proposed nZVI-PS-Fenton process can be applied to remove such kind of pollutants from (waste) water streams and prevent their spread into the environment.

关键词： nZVI Persulfate Fenton oxidation Degradation PPCPs

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Assessment of the Binding Mechanism of Ergothioneine to Human Serum Albumin: Multi-Spectroscopy, Molecular Docking and Molecular Dynamic simulation

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SSRN 2024年

作者： Meng, Xiaohui Xia, Zhangchen Cheng, Junwen Wang, Yanbin Ren, Xueyong He, Liang Liu, Dan Key Laboratory of State Forest Food Resources Utilization and Quality Control Zhejiang Academy of Forestry Hangzhou310023 China Zhejiang Provincial Key Laboratory of Resources Protection Innovation of Traditional Chinese Medicine Zhejiang A&F University Hangzhou311300 China National Forestry and Grassland Engineering Technology Center for Wood Resources Recycling College of Materials Science and Technology Beijing Forestry University Beijing100083 China Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province College of Biology and Environmental Engineering Zhejiang Shuren University Hangzhou310015 China

Ergothioneine (EGT) has attracted great attention due to its extremely potent antioxidant properties, universally acknowledged as ‘longevity vitamin’. In order to comprehensive understanding of its pharmacodynamics and pharmacokinetics, the binding mechanism of EGT with human serum albumin (HSA) was clarified by cutting-edged multi-spectroscopic approaches and in silico molecular docking coupled with molecular dynamic simulation. Our fluorescence quenching results revealed that the binding of EGT to HSA was in a static quenching mode validated by the descending Ksv values with temperatures increased and 1012 order of Kq. van’t Hoff criterion revealed the combination of EGT with HSA was a spontaneous exothermic process (ΔG=-24.16 kJ•mol-1) via hydrogen bonding and van der Waals force interactions (ΔH=-60.25 kJ•mol-1, ΔS=-129.44 J•mol-1•K-1) at 310 K. The analysis of UV-vis absorption spectrum, synchronous fluorescence spectrum, three-dimensional fluorescence spectrum and circular dichroism indicated the addition of EGT affected the microenvironment of Try214 and rearranged the structure of HSA. The binding replacement assay interpreted their binding site was near the subdomain IIA of HSA (Sudlow's site I), which was intuitively exhibited by molecular docking. In addition of obvious van der Wall forces, attractive charge and Pi-alkyl interactions, the chiral betaine group (N+(CH3+)3) in the side chain of EGT was inclined to form hydrogen bonds with Lys199, Ser287 and Arg257 in the hydrophobic cavity of albumin. Moreover, the dynamic simulation reinforced the equilibrium and stability of formed docking complex by four indicators (RMSD, RMSF, Rg, SASA) within 100 ns. This study has shredded insights on the elucidation of the binding behavior of EGT with HSA and paved an avenue for its deep application in the field of pharmaceuticals and cosmetics. © 2024, The Authors. All rights reserved.

关键词： Hydrogen bonds

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The China groundwater crisis: A mechanistic analysis with implications for global sustainability

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Sustainable Horizons 2022年 4卷

作者： Lancia, Michele Yao, Yingying Andrews, Charles B. Wang, Xiaoli Kuang, Xingxing Ni, Jinren Gorelick, Steven M. Scanlon, Bridget R. Wang, Yanxin Zheng, Chunmiao State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen China EIT Institute for Advanced Study Ningbo China Department of Earth and Environmental Sciences School of Human Settlements and Civil Engineering Xi'an Jiaotong University Xi'an China S.S. Papadopulos & Associates Inc. RockvilleMD United States Department of Civil Engineering The University of Hong Kong Hong Kong Hong Kong College of Environmental Sciences and Engineering Peking University Beijing China Department of Earth System Science Stanford University StanfordCA United States Bureau of Economic Geology Jackson School of Geosciences University of Texas at Austin AustinTX United States China University of Geosciences Wuhan China

Over the past several decades, China has rapidly depleted groundwater storage, and has lagged in managing and protecting this resource. As a result, dried up rivers, land subsidence, saltwater intrusion, and wetland losses are extensive. To assist with managing this vital groundwater resource, we constructed the first national-scale numerical groundwater flow model of China to provide a comprehensive overview and understanding of the subsurface flow dynamics. The groundwater model is three-dimensional with a 10 km by 10 km horizontal resolution and five discretized vertical layers (up to 1700 m below the land surface). The calibrated model matched calculated to observed water levels and sufficiently reproduced water budgets. The model was used to reconstruct groundwater depletion by retracing the different stages of Chinese economic development. From 1945 to 2020, the northern provinces are characterized by an average groundwater depletion of ∼16.7 km3/yr (equivalent to 30% of the Yellow River's annual flow) while southern China has experienced no substantial groundwater depletion. groundwater depletion is consistent with a large observed reduction in groundwater discharge as baseflow to the Yellow River (-23%) relative to negligible variation in baseflow in the Yangtze River. Our study provides a holistic tool to support development of nationwide water management strategies and temper the effects of a future water crisis that China's growing economy could propagate at the global scale. © 2022

关键词： groundwater resources

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Correction to "Emission Measurements on a Large Sample of Heavy-Duty Diesel Trucks in China by Using Mobile Plume Chasing"

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environmental science & technology 2023年第45期57卷 17659页

作者： Hui Wang Shaojun Zhang Xiaomeng Wu Yifan Wen Zhenhua Li Ye Wu School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing 100084 P. R. China. State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084 P. R. China. Beijing Laboratory of Environmental Frontier Technologies School of Environment Tsinghua University Beijing 100084 China.

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A review of prediction methods for oilfield produced water scaling

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IOP Conference Series: Earth and environmental Science 2021年第3期651卷

作者： Yan Yan Tao Yu Jiayu Song Baichun Wu Chengtun Qu State Key Laboratory of Petroleum Pollution Control CNPC Research Institute of Safety and Environmental Technology Beijing 102206 China College of Chemistry and Chemical Engineering Xi'an Shiyou University Shanxi Oil and Gas Pollution Control and Reservoir Protection Key Laboratory Xi'an 710065 China

In oilfield development, pipeline corrosion and reservoir damage caused by produced water scaling are serious problems. Studying the scaling trend of produced water, and predicting the scaling position, scale amount, and scale type is of great significance to the production and development of oilfields, as well as scale prevention and cleaning. In this paper, the mechanism of scaling in produced water is studied from the perspective of five aspects: fluid incompatibility, thermodynamic condition change, crystal adsorption, kinetic factors and bacterial corrosion; moreover, other factors affecting the scaling are analyzed. Mathematical models of scaling prediction methods, scaling prediction methods, and simulation experiments of scaling prediction methods are introduced, and the characteristics of each scaling prediction method and simulation experiment are compared. Finally, the development of scaling prediction methods is prospected.

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Correction: Impact of water quality parameters on bacteria inactivation by low-voltage electroporation: mechanism and control

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environmental Science: Water Research & Technology 2018年第6期4卷 882-882页

作者： Zheng-Yang Huo Guo-Qiang Li Tong Yu Yun Lu Hao Sun Yin-Hu Wu Cecilia Yu Xing Xie Hong-Ying Hu Environmental Simulation and Pollution Control State Key Joint Laboratory State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC) School of Environment Tsinghua University Beijing 100084 PR China School of Civil and Environmental Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA Shenzhen Environmental Science and New Energy Technology Engineering Laboratory Tsinghua-Berkeley Shenzhen Institute Shenzhen 518055 PR China

Correction for ‘Impact of water quality parameters on bacteria inactivation by low-voltage electroporation: mechanism and control’ by Zheng-Yang Huo et al., Environ. Sci.: Water Res. Technol., 2018, DOI: 10.1039/c8e...

Correction for ‘Impact of water quality parameters on bacteria inactivation by low-voltage electroporation: mechanism and control’ by Zheng-Yang Huo et al., Environ. Sci.: Water Res. Technol., 2018, DOI: 10.1039/c8ew00041g.

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Species Diversity, Growth, Status, and Biovolume of Taia River Riparian Forest in Southern Sierra Leone: Implications for Community-Based Conservation

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International Journal of Forestry Research 2020年第1期2020卷

作者： Fayiah, Moses Kallon, Baimba F. Dong, Shikui James, Mathew S. Singh, Sanjay State Key Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Department of Forestry School of Natural Resources Management Njala University Moyamba District Southern Province Sierra Leone Department of Biological Sciences School of Environmental Sciences Njala University Moyamba District Southern Province Sierra Leone Biodiversity and Climate Change Division Indian Council of Forestry Research and Education Dehradun India

Riparian forest inventory is essential in understanding the floristic biodiversity and provides necessary information on the growth trend and status of plant diversity along forest ecosystem, especially the riparian forests. This study was undertaken to assess the species diversity, growth status, and bio-volume of Taia riparian forest for community-based conservation intervention. In this study, we enumerated 602 individual trees, which comprised 49 species that belong to 37 genera in 25 families. In total, 14 rectangular plots of dimension 20 × 50 m2 were demarcated. All trees species within the sampled plots having diameter at breast height [Dbh] ≥7 cm were identified and height measured using the Haga altimeter, girth and measuring tape to determine the growth status. The result shows that 83% of the trees enumerated have [Dbh] that range from 7 to 30 cm, whereas 17% had [Dbh] greater than 30 cm. Funtumia africana and Trichilia heudelotii were the dominant species in almost all aspects in the study area. Meliaceae, Apocynaceae, and Mimosaceae were the dominant families with the highest species. The Shannon diversity index was 3.094, whereas the Simpson and Evenness diversity was 0.9303 and 0.4502, respectively. Other diversity indices estimated were Margalef 7.544, Equitability 0.7949, and Fisher_alpha 12.77. The overall biovolume was 283.05 m,3 with a total basal cover of 12.54 m2. Height and [Dbh] were not significantly correlated with the biovolume. Biotic pressure such as fuelwood collection, unsustainable charcoal production, pole harvesting, bushfires, and other traditional and cultural functions contributes greatly to the exploitation of the riparian forest. Therefore, urgent strategic conservation and protection measures should be adopted to prevent further degradation of forest ecosystems along river banks in the district and other ecologies in Sierra Leone. © 2020 Moses Fayiah et al.

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A Mixed Layer Height Parameterization in a 3-D Chemical Transport Model: Implications for Gas and Aerosol simulations

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SSRN 2024年

作者： Kim, Hyeonmin Park, Rokjin J. Hong, Song-You Park, Do-Hyeon Kim, Sang-Woo Oak, Yujin J. Feng, Xu Lin, Haipeng Fu, Tzung-May School of Earth and Environmental Sciences Seoul National University Seoul Korea Republic of Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder United States Physical Sciences Laboratory The National Oceanic and Atmospheric Administration Earth System Research Laboratories Boulder United States Center for Sustainable Environment Research Korea Institute of Science and Technology Seoul Korea Republic of John A. Paulson School of Engineering and Applied Sciences Harvard University CambridgeMA United States State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Guangdong Shenzhen China Shenzhen Institute of Sustainable Development Southern University of Science and Technology Guangdong Shenzhen China Seoul National University Korea Republic of

Vertical mixing within the planetary boundary layer (PBL) is crucial for determining surface-level pollutant concentrations. However, standard PBL schemes in chemical transport models (CTMs) often fail to adequately define the upper bounds of vertical mixing, particularly at night. This limitation frequently results in overestimated nocturnal concentrations of pollutants near the surface. To address this issue, we propose a parameterization of mixed layer height (MLH) derived from the Yonsei University (YSU) PBL scheme and thoroughly evaluate it by comparing simulations with various observations. We utilized the Weather Research and Forecasting model coupled with GEOS-Chem (WRF-GC) to simulate gas and aerosol distributions over South Korea during the Satellite Integrated Joint Monitoring of Air Quality (SIJAQ) campaign in 2021. The WRF-GC simulations incorporating the MLH parameterization improved the excessive titration of O3 and the overproduction of HNO3 and NO3- in the model. Consequently, the model performances in gaseous and aerosol simulations showed a better agreement with observations, with changes in normalized mean biases (NMBs) of NOX (from 50% to -27%), O3 (from -49% to -28%), NO3- (from 126% to 91%), NH4+ (from 113% to 85%), BC (from 322% to 135%), and PM2.5 (from 58% to 28%). © 2024, The Authors. All rights reserved.

关键词： Atmospheric chemistry

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Influence of turbulence boundary condition on pollutant diffusion for a natural draft cooling tower with flue gas injection

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Journal of Physics: Conference Series 2019年第1期1300卷

作者： Guangjun Yang Li Ding Zhaobing Guo School of Atmospheric Physics Nanjing University of Information Science & Technology Nanjing China State Environmental Protection Key Laboratory of Atmospheric Physical Modeling and Pollution Control National Environmental Protection Research Institute for Electric Power Nanjing China

The influence of the specification of turbulence model in equilibrium atmosphere boundary layer (ABL) on the numerical simulation of pollutant diffusion for a natural draft cooling tower with flue gas injection is investigated. The ABL must be considered due to the immense size of cooling tower. The flow field and pollutant distribution under the circumstance of different turbulence boundary conditions are predicted by solving Navier-Stokes (N-S) equations based on shear-stress transport (SST) k-ω turbulence model. The results indicate that the pollutant distribution remains almost unchanged when the turbulence boundary condition changed, it can be inferred that the turbulence boundary condition has little effect on the diffusion of pollutant for other Reynolds Average Navier-Stokes (RANS) turbulence models. Since RANS cannot consider the fluctuation velocity, it is not very suitable for predicting the pollutant diffusion. To more accurately simulate the pollutant propagation and diffusion, the large eddy simulation (LES) model is needed.

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Author Correction: China's greenhouse gas emissions for cropping systems from 1978-2016

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Scientific data 2023年第1期10卷 122页

作者： Dijuan Liang Xi Lu Minghao Zhuang Guang Shi Chengyu Hu Shuxiao Wang Jiming Hao Beijing Laboratory of Environmental Frontier Technologies School of Environment Tsinghua University Beijing 100084 China. Department of Environmental Health Harvard T.H. Chan School of Public Health Boston MA USA. Beijing Laboratory of Environmental Frontier Technologies School of Environment Tsinghua University Beijing 100084 China. xilu@***. State Key Joint Laboratory of Environment Simulation and Pollution Control and State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University Beijing 100084 P. R. China. xilu@***. College of Resources and Environmental Sciences National Academy of Agriculture Green Development Key Laboratory of Plant-Soil Interactions of MOE China Agricultural University Beijing P.R. China. School of Computer Science China University of Geosciences Wuhan 430074 China. State Key Joint Laboratory of Environment Simulation and Pollution Control and State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University Beijing 100084 P. R. China.

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