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The Spatio-temporal Evolution of Ecological Risk and Its Drivers in the Weihe River Basin Landscape from 1990 to 2020

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Journal of Resources and Ecology 2024年第4期15卷 1004-1014页

作者： SUN Linlin xu delan MU Zhiqiang ZHAO Xiaowen LIU Baoguo School of Architecture Kashi UniversityKashiXinjiang 844006China School of Management Engineering Huaiyin Institute of TechnologyHuai’anJiangsu 541004China College of Landscape Architecture and Art Henan Agricultural UniversityZhengzhou 450002China

The Weihe River Basin has a significant number of tributaries and a delicate ecological *** the spatial and temporal evolution and determinants of landscape ecological risk in the Weihe River Basin(WRB)can improve the scientific protection and development of its watershed *** study is based on land use statistics from the WRB for a 30-year period represented by 1990,2000,2010,and *** initial model for the assessment of landscaping ecological hazards was created using the software that was also used to generate the landscape ecological risk index,such as ArcGIS 10.4 and Fragstats ***,the spatial and temporal evolution of landscape ecological risk in the vicinity of the study area was characterized by the trajectory of the center of gravity migration and the spatial autocorrelation of ***,Geodetector was used to analyze ecological risk drivers in the *** to the findings,the high-risk and relatively high-risk regions are steadily expanding,while the low-risk and relatively low-risk areas dominate the ecological risk landscape in the *** the Weihe River Basin,Xianyang and Xi'an are the areas to which the high-risk centers of gravity are *** spatial correlations were found between the landscape ecological hazards in the study area,most prominently in the form of high-high and low-low *** primary drivers are the interplay between the GDP component,temperature,and elevation as a single factor.

关键词： land use landscape ecological risk GIS spatio-temporal analysis geodetector Weihe River Basin

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生态式膜生物反应器处理生活污水的中试研究

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工业水处理 2015年第12期35卷 30-33页

作者：刘强徐德兰张学杨徐州工程学院环境工程学院江苏徐州221111

在曝气池中种植芦苇,将普通的膜生物反应器(MBR)改造成生态式膜生物反应器(EMBR)。采用EMBR处理生活污水,对其处理效能进行中试研究。试验结果表明,EMBR能够有效去除有机物及营养物质,对COD、BOD5、NH3-N、TN、TP的平均去除率分别为95.7... 详细信息

在曝气池中种植芦苇,将普通的膜生物反应器(MBR)改造成生态式膜生物反应器(EMBR)。采用EMBR处理生活污水,对其处理效能进行中试研究。试验结果表明,EMBR能够有效去除有机物及营养物质,对COD、BOD5、NH3-N、TN、TP的平均去除率分别为95.7%、97.3%、97.3%、48.7%、79.3%。EMBR处理效能的提高主要归功于芦苇根系附着生物膜的生物降解作用以及芦苇的吸收作用。

关键词：膜生物反应器芦苇生活污水

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Riverine sulfate sources and behaviors in arid environment,Northwest China:Constraints from sulfur and oxygen isotopes

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Journal of Environmental Sciences 2024年第3期137卷 716-731页

作者： Yifu xu Wenjing Liu Bing xu Zhifang xu Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

The fate of riverine sulfate ion (SO_(4)^(2-)) and its environmental effects in arid environment are difficult to evaluate due to its complicated sources and strongly coupled behaviors with water cycle which is significantly modified by *** understand the sulfur cycle in aquatic systems in arid environment,the chemical and sulfur and oxygen isotopic compositions (δ^(34)S_(SO4)and δ^(18)O_(SO4)) of major rivers around the Badain Jaran Desert,northwestern China,were *** rivers had averaged SO_(4)^(2-)content at 1336μmol/L,over 10times higher than the global *** δ^(34)S_(SO4)and δ^(18)O_(SO4)values ranged from-5.3‰to+11.8‰and+1.6‰to+12.8‰,*** end-member analysis and the inverse model showed that riverine sulfate was mainly derived from evaporites dissolution (0-87%),sulfide oxidation (13%-100%) and precipitation (0-33%),indicating heterogeneity in sulfur sources and behaviors along the river drainage with the lithology variations and climate *** isotopic tools combining with hydro-chemistry compositions could be applied to reveal sulfur cycle in arid *** on the calculation,sulfide oxidation plays the primary role in the headwater and upstream in the Qilian-Mountains area,where sulfide is widely *** the proportion of evaporites dissolution contributing to riverine sulfate is much higher in downstream in a drier ***,less precipitation and higher temperature can lead to more intensive evaporation,affecting the process of sulfide oxidation and enhancing the rates of evaporites dissolution and sulfate precipitation in the basin.

关键词： Sulfur and oxygen isotopes Source apportionment Inverse model Arid environment Inland rivers Northwestern China

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Laboratory evaluation of high-friction thin overlays for pavement preservation

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Frontiers of Structural and Civil Engineering 2024年第6期18卷 936-948页

作者： Ouming xu Rentao xu Lintong JIN School of Highway Chang’an UniversityXi’an 710064China School of Materials Science and Engineering Chang’an UniversityXi’an 710061China

Traditional asphalt concrete(AC)and stone matrix asphalt(SMA),which are used as thin asphalt overlays,are common maintenance strategies to enhancing ride quality,skid resistance,and ***,several studies have used a novel asphalt mixture known as a high-friction thin overlay(HFTO)to improve surface ***,it remains uncertain whether the laboratory properties of HFTO differ significantly from those of conventional *** study aims to evaluate the laboratory properties of HFTO mixtures and compare them with those of AC and *** mixtures with nominal maximum size of 9.5 mm were produced in the laboratory,and performance tests were conducted,including wheel tracking test,low temperature flexural creep test,moisture susceptibility test,Cantabro Abrasion Test,Marshall Test,sand patch test,British pendulum test,and indoor tire-rollingdown *** results showed that the HFTO exhibited a lower tire/pavement noise than the AC and ***,HFTO had superior high-temperature stability,larger macro texture,and higher skid resistance in comparison to those of AC,but lower than those of ***,HFTO mixtures may be considered a suitable replacement for traditional AC mixtures in regions where skid resistance and noise reduction are concerns.

关键词： road engineering pavement maintenance high friction thin overlay performance skid resistance tire/pavement noise

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生态园林城市建设驱动下的城市绿地景观格局变化研究

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广西师范大学学报（自然科学版） 2020年第6期38卷 140-147页

作者：杨瑞卿杨学民徐德兰徐州工程学院环境工程学院江苏徐州221008 徐州市住房和城乡建设局江苏徐州221008 桂林理工大学旅游与风景园林学院广西桂林541004 桂林理工大学植物与生态工程学院广西桂林541004

生态园林城市是人与自然和谐相处的最佳城市形态,建设生态园林城市对城市绿地景观格局优化具有重要作用。以徐州市2004年和2014年的Quick Bird卫星影像为信息源,运用地理信息系统技术,选取斑块平均面积、斑块密度、香农多样性指数、香... 详细信息

生态园林城市是人与自然和谐相处的最佳城市形态,建设生态园林城市对城市绿地景观格局优化具有重要作用。以徐州市2004年和2014年的Quick Bird卫星影像为信息源,运用地理信息系统技术,选取斑块平均面积、斑块密度、香农多样性指数、香农均匀度指数、最小距离指数和廊道密度等,对徐州市在国家生态园林城市建设驱动下的绿地景观格局变化进行研究。结果表明:2004—2014年,徐州市城市绿地斑块平均面积从0.17 hm^2增加到0.40 hm^2,斑块密度从5.97个/hm^2降低到2.45个/hm^2,廊道密度从1.12 km/km^2增加到2.32 km/km^2,公园绿地最小距离指数明显增加。这说明在国家生态园林城市建设驱动下,徐州市中心城区的绿地数量在增长的同时,景观格局也在不断优化,主要表现为:绿地斑块增大、破碎度降低、景观连接度明显提高、防护绿地功能增强、公园绿地分布向均匀化发展,这些变化对保护城市生物多样性、提升城市绿地系统生态功能、方便居民使用起到重要作用。

关键词：城市绿地景观格局生态园林城市徐州市

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大型水生植物对东太湖河湖交汇区矿质元素分布特征的影响

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生态环境学报 2009年第5期18卷 1644-1648页

作者：徐德兰雷泽湘韩宝平中国矿业大学环境与测绘学院江苏徐州221008 徐州工程学院环境工程系江苏徐州221008 仲恺农业技术学院环境科学与工程系广东广州510225

河流是湖泊物质运移的重要通道,对湖泊生态系统有重要的影响。各矿质元素及营养物质迁移、累积使得河湖交汇处成为重金属元素和营养物质的汇库。通过对太湖的入湖河流及其与太湖交汇区域不同植物群落沉积物中矿质元素、有机质含量分析,... 详细信息

河流是湖泊物质运移的重要通道,对湖泊生态系统有重要的影响。各矿质元素及营养物质迁移、累积使得河湖交汇处成为重金属元素和营养物质的汇库。通过对太湖的入湖河流及其与太湖交汇区域不同植物群落沉积物中矿质元素、有机质含量分析,结果表明:河流表层沉积物重金属元素含量是其与太湖交汇区表层沉积物重金属元素含量的4～5倍。而元素间的相关系数因不同的生态环境存在差异,且P、Ca、Cu、Sr与其它元素间在河湖交汇区及定向河道均无显著相关关系;而SOM在河湖交汇区有强相关,而在河流中则否。

关键词：水生生态系统重金属河流太湖

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郑州黄河风景名胜区生态敏感性评价研究

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林业资源管理 2022年第6期 95-100页

作者：孙林林徐德兰刘保国河南农业大学风景园林与艺术学院淮阴工学院管理工程学院

利用AHP层次分析法从地形地貌、自然环境、风景资源、人类活动4个方面对郑州黄河风景名胜区进行生态敏感性评价。结果表明：郑州黄河风景名胜区整体生态敏感性以中、高为主；不敏感区面积为2.195 km2,占比8.7%;低敏感区面积为6.104 km2... 详细信息

利用AHP层次分析法从地形地貌、自然环境、风景资源、人类活动4个方面对郑州黄河风景名胜区进行生态敏感性评价。结果表明：郑州黄河风景名胜区整体生态敏感性以中、高为主；不敏感区面积为2.195 km2,占比8.7%;低敏感区面积为6.104 km2,占比24.3%;中敏感区面积为6.959 km2,占比27.7%;高敏感区面积为6.175km2,占比24.6%;极敏感区面积为3.697km2,占比14.7%。评价结果可为郑州黄河风景名胜区生态保护和高质量发展提供参考。

关键词：郑州黄河风景名胜区生态敏感性评价 AHP层次分析法 GIS空间分析法

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囊泡状介孔SiO_2合成因素的研究进展

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化工新型材料 2013年第6期41卷 3-6页

作者：张彦武翠翠徐德兰周国伟山东省高校轻工精细化学品重点实验室山东轻工业学院化学与制药工程学院济南250353

讨论了利用不同类型的表面活性剂作模板,通过硅源的水解与凝聚反应得到不同孔径的囊泡状介孔SiO2的合成过程。综述了通过改变不同反应物(模板剂、硅源、助剂)及反应条件(温度、pH值)调控囊泡形成及介孔结构转变的相关机理,并对囊泡状介... 详细信息

讨论了利用不同类型的表面活性剂作模板,通过硅源的水解与凝聚反应得到不同孔径的囊泡状介孔SiO2的合成过程。综述了通过改变不同反应物(模板剂、硅源、助剂)及反应条件(温度、pH值)调控囊泡形成及介孔结构转变的相关机理,并对囊泡状介孔SiO2的应用和发展前景进行了展望。

关键词：囊泡状SiO2 表面活性剂合成因素机理

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Aldehyde oxidase mediated enantioselective metabolic health risk of dinotefuran

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Science China Chemistry 2024年第6期67卷 2079-2091页

作者： Liwei xu Xinxin xu Hua Kuang Chuanlai xu Xiaoling Wu State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxi214122China International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology Jiangnan UniversityWuxi214122China Collaborative Innovation center of Food Safety and Quality Control in Jiangsu Province Jiangnan UniversityWuxi214122China

Chiral pollutants often pose significant differential environmental health *** this study,the biotransformation of chiral dinotefuran(DIN)and its enantioselective metabolic toxicity mechanisms have been systemically ***,reversedphase chromatography-high resolution mass spectrometry was developed to quantify the content of DIN R/S chiral enantiomer with pg level sensitivity,revealing a lower elimination rate constant(K_(e))of S-DIN(0.730 h^(-1))than R-DIN(0.746 h^(-1)).Secondly,the interaction mechanism between DIN metabolism and important endogenous bioactive molecules,such as aldehyde oxidase(AOX)and neurotransmitters,was *** DIN nitro-group was converted into a guanidine group by the reducing site of nearby flavin adenine dinucleotide(FAD)in AOX with the preferred higher affinity of ***,the endogenous tryptophan(Trp)aldehyde metabolic intermediate,5-hydroxyindoleacetaldehyde(5-HIAL),provides a persistent electron donor for DIN reduction via the oxidation-catalyzed site in AOX,resulting in remarkable up-regulation of monoamine neurotransmitters such as serotonin and ***,the higher level of neurotransmitters further mediated dysregulation of oxylipin homeostasis via the serotonergic pathway,where S-DIN exhibited more pronounced liver lipid damage and environmental health risk with the accumulated lipid biomarkers,oxidized triglyceride(OxTG)and oxidized sphingomyelin(OxSM).This study elucidates the AOX-mediated enantioselectivity metabolic pathway of DIN,providing a new analytical method for chiral pollutants and paves the way for their health risk assessments.

关键词： neonicotinoid dinotefuran enantiomer aldehyde oxidase metabolomics health risk

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Granting strength to aerogel fibers through encapsulation

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Science China Materials 2024年第4期67卷 1365-1366页

作者： Wenhui xu Department of Basic Chemistry School of PharmacyJiangxi University of Chinese MedicineNanchang 330004China

Aerogel fibers, distinguished by their lightweight nature, pronounced porosity, large surface area, and superior thermal insulation properties, have diversified applications in thermal management, energy devices, and environmental remediation[1]. However, compared with monolithic ones, these fibershaped aerogels exhibit limited mechanical strength and resilience due to their one-dimensional small size.

关键词： strength fibers thermal

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