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Progress in Natural Science:Materials International 2008年第7期18卷 867-872页

作者： qing zhang, jun huang, {2. yu * pops research centre, department of environmental Science and engineering, tsinghua university, beijing 100084,{12. pops research {2. Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

Quantitative structure–property relationship (QSPR) models were developed for soot–water partition coefficient (KSC) values of selected persistent organic pollutants (pops), i.e. 10 polychlorinated dibenzo-p-dioxins and dibenzofurans, nine polychlorinated biphe- nyls, four polycyclic aromatic hydrocarbons and two polybrominated diphenyl ethers, using partial least squares (PLS) regression. Quan- tum chemical descriptors computed by parameterized model revision 3 Hamiltonian method were used as predictor variables. The cross- validated Q2.um value for the optimal QSPR model is 0.844, indicating a good predictive capability for the logKSC values of these chem- icals. The QSPR results showed that average molecular polarizability (a), standard heat of formation (DHf) and energy of the lowest unoccupied molecular orbital (ELUMO) have dominant effects on KSC of pops. The results suggested that logKSC values of pops increase with the increase of a. Contrarily, logKSC values decrease with the increase of ELUMO and DHf of pops.

关键词： Quantitative structure–property relationships Black carbon Persistent organic pollutants Quantum chemical descriptors Partial least squares

Helmholtz decomposition with a scalar Poisson equation in elastic anisotropic media

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Petroleum Science 2024年第3期21卷 1597-1610页

作者： Xin-yu Fang gang Yao {2.-{2. Zheng Ping-Min zhang Di Wu Feng-Lin Niu State Key Laboratory of Petroleum Resources and engineering China University of Petroleum(Beijing)Beijing102249China Unconventional Petroleum research Institute China University of Petroleum(Beijing)Beijing102249China department of Mathematics College of ScienceChina University of Petroleum(Beijing)Beijing102249China College of Geophysics China University of Petroleum(Beijing)Beijing102249China department of Earth Environmental and Planetary SciencesRice UniversityHoustonTX77005UA

P-and S-wave separation plays an important role in elastic reverse-time *** can reduce the artifacts caused by crosstalk between different modes and improve image *** addition,P-and Swave separation can also be used to better understand and distinguish wave types in complex *** present,the methods for separating wave modes in anisotropic media mainly include spatial nonstationary filtering,low-rank approximation,and vector Poisson *** of these methods require multiple Fourier transforms or the calculation of large matrices,which require high computational costs for problems with large *** this paper,an efficient method is proposed to separate the wave mode for anisotropic media by using a scalar anisotropic Poisson operator in the spatial *** 2. problems,the computational complexity required by this method is 1/2.of the methods based on solving a vector Poisson ***,compared with existing methods based on pseudoHelmholtz decomposition operators,this method can significantly reduce the computational *** examples also show that the P and S waves decomposed by this method not only have the correct amplitude and phase relative to the input wavefield but also can reduce the computational complexity significantly.

关键词： Anisotropic media Scalar anisotropic Poisson equation Improved elastic wavefield decomposition

Phase transfer-based high-efficiency recycling of precious metal electrocatalysts

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Green Chemical engineering 2024年第1期5卷 68-74页

作者： qing Zeng Shaonan Tian yu {2. Hui Liu Dong Chen Xinlong Tian Chaoquan Hu jun Yang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing100190China State Key Laboratory of Marine Resource Utilization in South china Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou570228China Nanjing IPE Institute of Green Manufacturing Industry Nanjing211100China Center of Materials Science and Optoelectronics engineering University of Chinese Academy of SciencesBeijing100049China

Recycling precious metals with high-efficiency is undoubtedly beneficial to optimize resource utilization for environmental remediation and sustainable ***,we report an efficient route to recycle the palladium(Pd)and platinum(Pt)electrocatalysts using a phase transfer *** strategy involves acidic dissolution of deactivated precious metal(Pd/Pt)electrocatalysts from their loading substrates,mixing with an ethanolic solution of dodecylamine(DDA),subsequent extraction of metal ions into a non-polar organic phase,and final reduction by sodium borohydride to reproduce high-performance electrocatalysts towards typical electrochemical reactions,e.g.,oxygen reduction reaction(ORR)and ethanol oxidation reaction(EOR).In specific,the transfer efficiencies are up to 98%and the final recovery rate is over 85%for Pd and Pt electrocatalysts in each *** approach symbolizes a facile and efficient way to recover precious metals,which might be applied to recycling a wide range of metals in various realms after appropriate modifications.

关键词： Precious metal Phase transfer Extraction Recovery Electrocatalyst

Effects of Diesel Concentration on the Thermal Conductivity,Specific Heat Capacity and Thermal Diffusivity of Diesel-Contaminated Soil

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Journal of Thermal Science 2024年第2期33卷 696-709页

作者： WU yuhao WU yuefei LUO Gubai {2. Teng WANG qing FAN Liwu SONG Xin yu Zitao Key Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province Zhejiang UniversityHangzhou310027China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou310027China Institute of Thermal Science and Power Systems School of Energy EngineeringZhejiang UniversityHangzhou310027China Center environmental Protection Technology Company Limited Beijing100176China Institute of Soil Science Chinese Academy of SciencesNanjing210008China

High energy consumption is a serious issue associated with in situ thermal desorption(TD)remediation of sites contaminated by petroleum hydrocarbons(PHs).The knowledge on the thermophysical properties of contaminated soil can help predict accurately the transient temperature distribution in a remediation site,for the purpose of energy ***,such data are rarely reported for PH-contaminated *** this study,by taking diesel as a representative example for PHs,soil samples with constant dry bulk density but different diesel mass concentrations ranging from 0% to 2.% were prepared,and the variations of their thermal conductivity,specific heat capacity and thermal diffusivity were measured and analyzed over a wide temperature range between 0℃ and 12.℃.It was found that the effect of diesel concentration on the thermal conductivity of soil is negligible when it is below 1%.When diesel concentration is below 10%,the thermal conductivity of soil increases with raising the ***,when diesel concentration becomes above 10%,the change of the thermal conductivity of soil with temperature exhibits the opposite *** is mainly due to the competition between soil minerals and diesel,because the thermal conductivity of minerals increases with temperature,whereas the thermal conductivity of diesel decreases with *** analysis results showed that,compared with temperature,the diesel concentration has more significant effects on soil thermal *** of the diesel concentration,with the increase of temperature,the specific heat capacity of soil increases,while the thermal diffusivity of soil *** addition,the results of a control experiment exhibited that the relative differences of the thermal conductivity of the soil samples containing the same concentration of both diesel and a pure alkane are all below 10%,indicating that the results obtained with diesel in this study can be extended to the family of PHs.A theo

关键词： contaminated soil diesel concentration thermal conductivity specific heat capacity thermal diffusivity thermal desorption fractal model

Species-level Microbiota of Biting Midges and Ticks from Poyang Lake

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Biomedical and environmental Sciences 2024年第3期37卷 266-277,I0001-I0003页

作者： GONG Jian WANG Fei Fei LIU Yang qing PU Ji DONG Ling Zhi zhang Si Hui {2. Zhen Zhou {2. yu yuan LI Ya Ben YANG Cai Xin TAO yuan Meihui ZHAO Li jun JIN Dong LIU Li yun YANG Jing LU Shan department of Epidemiology School of Public HealthShanxi Medical UniversityTaiyuan 030001ShanxiChina National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China Jiangxi Provincial Key Laboratory of Animal-Origin and Vector-Borne Diseases Nanchang Center for Disease Control and PreventionNanchang 330038JiangxiChina research Units of Discovery of Unknown Bacteria and Function Chinese Academy of Medical SciencesBeijing 100730China

Objective The purpose of this study was to investigate the bacterial communities of biting midges and ticks collected from three sites in the Poyang Lake area,namely,Qunlu Practice Base,Peach Blossom Garden,and huangtong Animal Husbandry,and whether vectors carry any bacterial pathogens that may cause diseases to humans,to provide scientific basis for prospective pathogen discovery and disease prevention and *** Using a metataxonomics approach in concert with full-length 16S rRNA gene sequencing and operational phylogenetic unit(OPU)analysis,we characterized the species-level microbial community structure of two important vector species,biting midges and ticks,including 33 arthropod samples comprising 3,885 individuals,collected around Poyang *** A total of 662.OPUs were classified in biting midges,including 195 known species and 373 potentially new species,and 618 OPUs were classified in ticks,including 2.7 known species and 32. potentially new ***,OPUs with potentially pathogenicity were detected in both arthropod vectors,with 66 known species of biting midges reported to carry potential pathogens,including Asaia lannensis and Rickettsia bellii,compared to 50 in ticks,such as Acinetobacter lwoffii and Staphylococcus *** found that Proteobacteria was the most dominant group in both midges and ***,the outcomes demonstrated that the microbiota of midges and ticks tend to be governed by a few highly abundant *** sp7 was predominant in biting midges,while Coxiella sp1 was enriched in ***,Coxiella spp.,which may be essential for the survival of Haemaphysalis longicornis Neumann,were detected in all tick *** identification of dominant species and pathogens of biting midges and ticks in this study serves to broaden our knowledge associated to microbes of arthropod *** Biting midges and ticks carry large numbers of known and potentially novel bacteria,and carry a wide

关键词： Biting midge Tick Microbiota Pantoea Coxiella

Compound extreme inundation risk of coastal wetlands caused by climate change and anthropogenic activities in the Yellow River Delta,china

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Advances in Climate Change research 2024年第1期15卷 134-147页

作者： Xiao-Li WANG Ai-qing FENG Xi-Yong HOU qing-Chen CHAO Bai-{2.an SONG {2.-Bin LIU Qi-Guang WANG He XU {2.-Xin zhang Dong Li Li-Jie DONG {2. GUO CAS Key Laboratory of Coastal environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Shandong Key Laboratory of Coastal environmental Processes Yantai 264003China china Meteorological Administration Key Laboratory for Climate Prediction Studies National Climate CentreBeijing 100081China Tongji Urban Planning Design research Institute Shanghai 200092China School of Geography and Tourism Qilu Normal UniversityJinan 250200China china Meteorological Administration Training centre China Meteorological AdministrationBeijing 10008China university of Chinese Academy of Sciences Beijing 100049China Marine Science and Technology College Zhejiang Ocean UniversityZhoushan 316022China

The coastal wetlands of the Yellow River Delta(YRD)in china are crucial for their valuable resources,environmental significance,and economic ***,these wetlands are also vulnerable to the dual threats of climate change and human *** substantial attention to the historical shifts in YRD's coastal wetlands,uncertainties remain regarding their future trajectory in the face of compound risks from climate change and anthropogenic *** on a range of remote sensing data sources,this study undertakes a comprehensive investigation into the evolution of YRD's coastal wetlands between 2.00 and ***,the potential fate of coastal wetlands is thoroughly analyzed through the Land Use/Cover Change(LUCC)simulation using System Dynamic-Future Land Use Simulation(SD-FLUS)model and the extreme water levels projection integrated future sea-level rise,storm surge,and astronomical high tide in 2.30,2.50,and 2.00 under scenarios of SSP1-2.6,SSP2.4.5,and *** revealed that YRD's coastal wetlands underwent a marked reduction,shrinking by 1688.72.km²from 2.00 to *** decline was mostly attributed to the substantial expansion in the areas of artificial wetlands(increasing by 82..78 km2.,construction land(increasing by 767.71 km²),and shallow water(increasing by 2.4.58 km²).Looking ahead to 2.30-2.00,the fate of coastal wetlands appears to diverge based on different *** the SSP1-2.6 scenario,the area of coastal wetland is projected to experience considerable *** contrast,the SSP5-8.5 scenario anticipates a notable decrease in coastal *** to the inundated area suffered from the current extreme water levels,the study projects a decrease of 6.8%-10.6%in submerged coastal wetlands by 2.30 and 9.4%-18.2.by 2.50 across all *** 2.00,these percentages are projected to decrease by 0.4%(SSP2.4.5)and 2..1%(SSP5-8.5),but increase by 35.7%(SSP1-2.6).Results suggest that coastal wetlands in th

关键词： Climate change Anthropogenic activities Compound extreme risk Coastal wetlands Yellow River Delta

Disaster effects of climate change in High Mountain Asia:State of art and scientific challenges Disaster effects of climate change in High Mountain Asia:State of art and scientific challenges

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Advances in Climate Change research 2024年第3期15卷 367-389页

作者： Hao WANG Bin-Bin WANG Peng CUI Yao-Ming MA Yan WANG Jian-Sheng HAO yu WANG Ya-Mei LI Li-jun SUN Jiao WANG Guo-Tao {2. Wei-Mo LI yu LEI Wen-qing ZHAO Jin-Bo TANG Chao-yue LI Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Institute of Geographic Sciences and Natural Resources research Chinese Academy of SciencesBeijing 100101China china‒Pakistan Joint research Center on Earth Sciences Chinese Academy of SciencesIslamabad 45320Pakistan College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China College of Atmospheric Science Lanzhou UniversityLanzhou 730000China National Observation and research Station for Qomolongma Special Atmospheric Processes and environmental Changes Dingri 858200China

High Mountain Asia(HMA)shows a remarkable warming tendency and divergent trend of regional precipitation with enhanced meteorological *** rapid thawing of the HMA cryosphere may alter the magnitude and frequency of nature *** reviewed the influence of climate change on various types of nature hazards in HMA region,including their phenomena,mechanisms and *** reveals that:1)the occurrences of extreme rainfall,heavy snowfall,and drifting snow hazards are escalating;accelerated ice and snow melting have advanced the onset and increased the magnitude of snowmelt floods;2.due to elevating trigger factors,such as glacier debuttressing and the rapid shift of thermal and hydrological regime of bedrock/snow/ice interface or subsurface,the mass flow hazards including bedrock landslide,snow avalanche,ice-rock avalanches or glacier detachment,and debris flow will become more severe;3)increased active-layer detachment and retrogressive thaw slumps slope failures,thaw settlement and thermokarst lake will damage many important engineering structures and infrastructure in permafrost region;4)multi-hazards cascading hazard in HMA,such as the glacial lake outburst flood(GLOF)and avalanche-induced mass flow may greatly enlarge the destructive power of the primary hazard by amplifying its volume,mobility,and impact force;and 5)enhanced slope instability and sediment supply in the highland areas could impose remote catastrophic impacts upon lowland regions,and threat hydropower security and future water *** future,ongoing thawing of HMA will profoundly weaken the multiple-phase material of bedrock,ice,water,and soil,and enhance activities of nature *** and cascading hazards of high magnitude will prevail in *** the glacier runoff overpasses the peak water,low flow or droughts in lowland areas downstream of glacierized mountain regions will became more frequent and *** escalating hazards in the HMA region requires tackling s

关键词： High Mountain Asia Climate change Cryosphere degradation Nature hazards Disaster risk

Ecological risk assessment of OCPs and DLCs in the Haihe River

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Ecological risk assessment of OCPs and DLCs in the Haihe Riv...

Investigation of Mechanochemical Degradation of Dechlorane Plus as a Novel pops

持久性有机污染物论坛2.09暨第四届持久性有机污染物全国学术研讨会

作者： Bin Wang,gang yu,Tai Wang,{2. huang,Tingting zhang,Hongying Hu (department of environmental Science and engineering,pops research centre,tsinghua {12., beijing 100084,china

1 Introduction The Haihe River,the largest water body in the North china and the most badly polluted one among the seven largest rivers in china,flows through the Tianjin city and finally entered Bohai *** an important chemical industry city in china,Tianjin has produced huge amounts of organochlorine pesticides(OCPs),such as hexachlorocyclohexanes(HCHs),DDTs,as well as pentachlorophenol(PCP)

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Investigation of Mechanochemical Degradation of Dechlorane P...

Occurrence of pharmaceuticals in wastewater treatment plants of beijing,china

持久性有机污染物论坛2.10暨第五届持久性有机污染物全国学术研讨会

作者： Wang zhang,jun {2.,Xue Li,gang yu~*,Shubo Deng (department of environmental Science and engineering,pops research Center,tsinghua university,{12.,P.R.china)

*** DP is a chlorinated flame retardant additive which is highly effective,aliphatic chlorine-containing crystalline organic compound,ground to free-flowing,white *** compound was introduced as a substitute for Dechlo...

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Occurrence of pharmaceuticals in wastewater treatment plants...