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Effects of habitat configuration on biodiversity along gradients of forest cover on the Swiss Plateau

Forest Ecosystems 2024年第5期11卷 659-669页

作者： Yiwen Pan Anna M.Hersperger Gang Ge Michael P.Nobis key laboratory of poyang lake environment and resource utilization Ministry of EducationSchool of Resources&EnvironmentNanchang UniversityNanchang330031China Swiss Federal Institute for Forest Snow and Landscape Research WSLZürcherstrasse 1118903BirmensdorfSwitzerland School of Life Sciences Nanchang UniversityNanchang330031China

The negative effects of habitat loss on biodiversity are undisputed,while the effect of habitat configuration,i.e.,the spatial arrangement of habitat area,has been debated for *** develop a more comprehensive understanding,it is important to know when and how configuration *** this study,we tested whether forest configuration influences the richness of species in groups characterized by varying shade tolerance in different ways and how such effects are related to habitat amount(i.e.,the percentage of forest cover)at the landscape *** on 104 survey plots(each measuring 1km^(2))of vascular plants on the Swiss Plateau,and using two statistical approaches(i.e.,multiple regression and path analysis),we modeled the effects of habitat amount and configuration(measured as number of forest patches,total edge length,and proximity index)across all the plots and separately for three habitat amount classes:30%forest *** we modeled all plots together,we found that,after controlling for habitat amount,the forest configuration significantly affected species *** we considered the different habitat amount classes separately,most of the significant effects of habitat configuration on species richness occurred only for habitat amounts of<10%forest ***,the response to forest configuration differed among species with different shade *** forest area was<10%,the effects of the number of patches and the total edge length on the species richness of light-demanding forest species were greater than the effect of habitat amount,whereas neither configuration metric affected the richness of shade-tolerant *** conclusion,our findings highlight the importance of configuration in landscapes with a small amount of *** the same time,they demonstrate that considering the confounding factors(*** traits)is important for understanding the effects of forest configuration on biodiversity and that genera

关键词： Forest plants Habitat amount Landscape fragmentation Species richness Swiss Plateau

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Asymmetric configuration activating lattice oxygen via weakening d-p orbital hybridization for efficient C/N separation in urea overall electrolysis

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Journal of Energy Chemistry 2024年第5期92卷 233-239页

作者： Chongchong Liu Peifang Wang Bin Hu Xiaoli Liu Rong Huang Gang Zhou key laboratory of Integrated Regulation and resource Development on Shallow lake of Ministry of Education College of EnvironmentHohai UniversityNanjing 210098JiangsuChina

Urea oxidation reaction(UOR)is proposed as an exemplary half-reaction in renewable energy applications because of its low thermodynamical ***,challenges persist due to sluggish reaction kinetics and complex by-products *** this end,we introduce the lattice oxygen oxidation mechanism(LOM),propelling a novel UOR route using a modified CoFe layered double hydroxide(LDH)catalyst termed *** calculations and in-situ characterizations highlight the activated lattice oxygen(O_(L))within CFRO-7 as pivotal sites for UOR,optimizing the reaction pathway and accelerating the *** the urea overall electrolysis application,the LOM route only requires a low voltage of 1.54 V to offer a high current of 100 mA cm^(-2) for long-term utilization(>48 h).Importantly,the by-product NCO^(-)−is significantly suppressed,while the CO_(2)2/N_(2) separation is efficiently *** work proposed a pioneering paradigm,invoking the LOM pathway in urea electrolysis to expedite reaction dynamics and enhance product selectivity.

关键词： Lattice oxygen Urea oxidation reaction Overall electrolysis Products selectivity

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Greenhouse gas emissions from Daihai lake,China:Should eutrophication and salinity promote carbon emission dynamics?

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Journal of environmental Sciences 2024年第1期135卷 407-423页

作者： Xiangwei Li Ruihong Yu Jun Wang Heyang Sun Xinyu Liu Xiaohui Ren Shuai Zhuang Zhiwei Guo Xixi Lu Inner Mongolia key laboratory of River and lake Ecology School of Ecology and EnvironmentInner Mongolia UniversityHohhot 010070China key laboratory of Mongolian Plateau Ecology and resource utilization Ministry of EducationHohhot 010070China Autonomous Region Collaborative Innovation Center for Integrated Management of Water resources and Water environment in the Inner Mongolia Reaches of the Yellow River Hohhot 010018China Department of Geography National University of Singapore117570Singapore

Greenhouse gases(GHGs)emitted or absorbed by lakes are an important component of the global carbon ***,few studies have focused on the GHG dynamics of eutrophic saline lakes,thus preventing a comprehensive understanding of the carbon ***,we conducted four sampling analyses using a floating chamber in Daihai lake,a eutrophication saline lake in Inner Mongolia Autonomous Region,China,to explore its carbon dioxide(CO_(2))and methane(CH_(4))*** mean CO_(2)emission flux(FCO_(2))and CH_(4)emission flux(FCH_(4))were 17.54±14.54 mmol/m^(2)/day and 0.50±0.50 mmol/m^(2)/day,*** results indicated that Daihai lake was a source of CO_(2)and CH_(4),and GHG emissions exhibited temporal *** mean CO_(2)partial pressure(p CO_(2))and CH_(4)partial pressure(p CH_(4))were 561.35±109.59μatm and 17.02±13.45μatm,which were supersaturated relative to the *** regression and correlation analysis showed that the main influencing factors of p CO_(2)were wind speed,dissolved oxygen(DO),total nitrogen(TN)and Chlorophyll a(Chl.a),whereas the main influencing factors of p CH_(4)were water temperature(WT),Chl.a,nitrate nitrogen(NO_(3)^(-)-N),TN,dissolved organic carbon(DOC)and water *** regulated carbon mineralization and organic matter decomposition,and it was an important influencing factor of p CO_(2)and p CH_(4).Additionally,the trophic level index(TLI)significantly increased p CH_(4).Our study elucidated that salinity and eutrophication play an important role in the dynamic changes of GHG ***,research on eutrophic saline lakes needs to be strengthened.

关键词： Eutrophication Salinity Greenhouse gas emissions Inland lake Inner Mongolia Autonomous Region

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Efficient stabilization of dredged sludge with high water content using an improved bio-carbonation of reactive magnesia cement method

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第9期16卷 3760-3771页

作者： Rui Wang Chaosheng Tang Xiaohua Pan Dianlong Wang Zhihao Dong Xiying Zhang Xiancai Lu School of Earth Sciences and Engineering Nanjing UniversityNanjing210023China Qinghai Provincial key laboratory of Geology and environment of Salt lake Qinghai Institute of Salt LakesChinese Academy of SciencesXining810008China

This study proposed an improved bio-carbonation of reactive magnesia cement(RMC)method for dredged sludge stabilization using the urea pre-hydrolysis *** on unconfined compression strength(UCS),pickling-drainage,and scanning electron microscopy(SEM)tests,the effects of prehydrolysis duration(T),urease activity(UA)and curing age(CA)on the mechanical properties and microstructural characteristics of bio-carbonized samples were systematically investigated and *** results demonstrated that the proposed method could significantly enhance urea hydrolysis and RMC bio-carbonation to achieve efficient stabilization of dredged sludge with 80%high water content.A significant strength increment of up to about 1063.36 kPa was obtained for the bio-carbonized samples after just 7 d of curing,which was 2.64 times higher than that of the 28-day cured ordinary Portland cement-reinforced *** elevated T and UA could notably increase urea utilization ratio and carbonate ion yield,but the resulting surge in supersaturation also affected the precipitation patterns of hydrated magnesia carbonates(HMCs),which weakened the cementation effect of HMCs on soil particles and further inhibited strength enhancement of bio-carbonized *** optimum formula was determined to be the case of T?24 h and UA?10 U/mL for dredged sludge stabilization.A 7-day CA was enough for bio-carbonized samples to obtain stable strength,albeit slightly affected by *** benefits of high efficiency and water stability presented the potential of this method in achieving dredged sludge stabilization and resource *** investigation provides informative ideas and valuable insights on implementing advanced bio-geotechnical techniques to achieve efficient stabilization of soft soil,such as dredged sludge.

关键词： Reactive magnesia cement(RMC)biocarbonation Urea pre-hydrolysis Dredged sludge Efficient stabilization Unconfined compressive strength Microbially induced carbonate precipitation(MICP)

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Spatial and temporal water quality characteristics of poyang lake Migratory Bird Sanctuary in China

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Chinese Journal Of Geochemistry 2015年第1期34卷 38-46页

作者： Yue Liang Huayun Xiao Xiaozhen Liu Jian Xiong Wenhua Li key laboratory of poyang lake environment and resource utilization Ministry of Education School of Environmental and Chemical Engineering Nanchang University

poyang lake Migratory Bird Sanctuary includes Bang lake, Sha lake, Dahu lake, and estuaries of the Xiu and Gan Rivers in the Migratory Bird Natural Reserve. Water samples were collected and analyzed to study spatial and temporal water quality variation. Strong seasonal variation of water quality was found. The water quality of Bang lake was relatively poor compared to Sha and Dahu lakes in the wet season, but better in the normal season. During the dry season, the water quality of Bang lake is negatively affected by the activity of migratory birds. According to the correlation analysis of monthly concentrations of each parameter, the concentrations of COD, NH?-4–N, and NO3–N were highly correlated. The correlation index was 0.829 and significance index was0.042 \ 0.05. From north to south within Bang lake, the concentration of TN decreased; however, the concentration of Chl-a increased. From east to west within Bang lake,concentrations of COD, NH?4–N, NO-3–N, and Chl-a increased. The Xiu and Gan Rivers influence the water quality of Bang lake, especially in the northeast area of the lake. The water quality of Bang lake only reached Chinese water quality standard level IV or V according to a fuzzy comprehensive evaluation. The evaluation factors impacting Bang lake are TN[TP[NH?4–N[COD, in order of decreasing importance. The waters of poyang lake Migratory Bird Sanctuary have been polluted; one of the important contributing factors was migratory birds' disturbance and feces.

关键词：候鸟保护区水质特点鄱阳湖时间空间中国 O3浓度环境质量标准

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Biomass briquette fuel,boiler types and pollutant emissions of industrial biomass boiler:A review

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颗粒学报:英文版 2023年第6期77卷 79-90页

作者： Hong Huang Yan Gao Hunan Chen Yiying Wu Jiayi Wang Chenglong Yu Jianlong Li Changwei Zou School of resources and environment Nanchang UniversityNanchang330031China key laboratory of poyang lake environment and resource utilization Ministry of EducationNanchang330031China School of Land resources and environment Jiangxi Agricultural UniversityNanchang330045China

Biomass is considered a renewable and cleaner energy source alternative to fossil *** recent years,industrial biomass boilers have been rapidly developed and widely used in the industrial *** work makes a review on the fuel types used in industrial biomass boilers,the fuel characteristics and the characteristics of air pollutants emitted from the combustion of industrial biomass boilers and other contents in different ***,the existing research still has many *** the future,further research on biomass fuel,industrial biomass boiler combustion process and the pollutants emitted by industrial biomass boiler combustion,especially the carbonaceous aerosol emitted by in-dustrial biomass boiler and carbonaceous aerosol optical properties still need to be *** the same time,the potential harm of carbonaceous aerosols emitted from industrial biomass boiler sources to human health and climate change needs to be studied in *** review provides a scientific basis for the accurate evaluation of industrial biomass boilers and the effective prevention and control of various pollutants of industrial biomass boilers.

关键词： Industrial biomass boilers Biomass briquette fuel Emissions of air pollutants Biomass combustion

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Postsynthetic acid modification of amino-tagged metal-organic frameworks:Structure-function relationship for catalytic 5-hydroxymethylfurfural synthesis

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Chinese Journal of Chemical Engineering 2022年第9期35卷 245-252页

作者： Yao Zhong Cuiying Huang Lijie Li Qiang Deng Jun Wang Zheling Zeng Shuguang Deng key laboratory of poyang lake environment and resource utilization(Nanchang University)of the Ministry of Education School of ResourceEnvironmental and Chemical EngineeringNanchang UniversityNanchang 330031China School for Engineering of Matter Transport and EnergyArizona State UniversityArizona 85287United States

Developing an efficient and selective catalyst for the dehydration of fructose to 5-hydroxymethylfurfural(HMF)is significant for biomass ***,a metal-organic framework(MOF)with acidity and strong hydrophobicity is first reported by the condensation of amino-tagged MOFs with mercapto carboxylic acids and subsequent *** hydrophobic acidic MOFs possess acid densities ranging from 0.2-1.0 mmol·g^(-1),H_(2)O contact angles of 114°-125°,and specific surface areas above260 m^(2)·g^(-1).Compared to the methyl sulfo-functionalized MOF,the benzene sulfo-functionalized MOF with a strong hydrophobicity shows much higher activity and selectivity for the conversion of fructose to *** particular,2.99%(mass)UiO-PhSO_(3)H shows the best catalytic performance with a 90.4%HMF yield due to its suitable hydrophobicity and abundant acidic ***,the catalyst shows great stability after recycling for 5 *** work provides an interesting design strategy for the preparation of hydrophobic acidic MOFs and shows the powerful synergistic effect of acidity and hydrophobicity.

关键词： Metal-organic framework 5-Hydroxymethylfurfural Fructose Acidity Hydrophobicity

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Effect of hydroxyl groups on hydrophilic and photocatalytic activities of rare earth doped titanium dioxide thin films

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Journal of Rare Earths 2015年第2期33卷 148-153页

作者：杜军吴其钟汕顾馨刘娇郭海志张文龙彭海龙邹建国 key Lab of poyang lake Ecology and Bio-resource utilization (Ministry of Education) Department of Chemical Engineering College of Environmental and Chemical Engineering Nanchang University

Rare earth（Y, La and Nd） doped TiO2 thin films were prepared on glass slides by sol-gel method. The photocatalytic decomposition of methylene blue in aqueous solution was used as a probe reaction to evaluate their photocatalytic activities. The effects of hydroxyl groups on hydrophilic and photocatalytic activities were investigated by means of techniques such as X-ray diffraction（XRD）, atomic force microscopy（AFM）, Fourier transform infrared（FTIR）, optical contact angle, UV-Visible spectroscopy and VIS spectroscopy. The results showed that an appropriate doping of rare earth could cause the TiO2 lattice distortion, inhibited phase transition from anatase to rutile, accelerated surface hydroxylation and produced more hydroxyl groups, which resulted in a denser surface and smaller grains（40–60 nm）, and a significant improvement in the hydrophilicity and photoreactivity of TiO2 thin films. The optimal content of rare earth was between 0.1 wt.% and 0.3 wt.%. Moreover, the modification mechanism of rare earth doping was also discussed.

关键词： TiO2 rare earth hydroxyl groups hydrophilicity photocatalytic activity

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Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactive black 5

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Frontiers of environmental Science & Engineering 2021年第5期15卷 237-246页

作者： Zhifei Ma Huali Cao Fengchun Lv Yu Yang Chen Chen Tianxue Yang Haixin Zheng Daishe Wu key laboratory of poyang lake environment and resource utilization(Ministry of Education) School of Resources Environmental&Chemical EngineeringNanchang UniversityNanchang330031China State key laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing100012China

High-efficiency and cost-effective catalysts with available strategies for persulfate(PS)activation are critical for the complete mineralization of organic contaminants in the environmental remediation and protection fields.A nanoscale zero-valent iron-embedded modified mesoporous carbon(MCNZVI)with a core-shell structure is synthesized using the hydrothermal synthesis method and high-temperature *** results showed that nZVI could be impregnated within mesoporous carbon frameworks with a comparatively high graphitization degree,rich nitrogen doping content,and a large surface area and pore *** material was used as a persulfate activator for the oxidation removal of Reactive Black 5(RB5).The effects of the material dosage,PS concentration,pH,and some inorganic anions(i.e.,Cl^(−),SO_(4)^(2−))on RB5 degradation were then *** highest degradation efficiency(97.3%)of RB5 was achieved via PS(20 mmol/L)activation by the MCNZVI(0.5 g/L).The pseudo-first-order kinetics(k=2.11×10^(−2)min^(−1))in the MCNZVI/PS(0.5 g/L,20 mmol/L)was greater than 100 times than that in the MCNZVI and *** reactive oxygen species(ROS),including^(1)O_(2),SO_(4)^(·−),HO^(.),and·O_(2)^(−),were generated by PS activation with the *** oxygen was demonstrated to be the primary ROS responsible for the RB5 *** MCNZVI could be reused and regenerated for *** work provides new insights into PS activation to remove organic contamination.

关键词： MCNZVI Core-shell structure Reactive Black 5 Persulfate Mechanism

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Contrasting sources and enrichment mechanisms in lithium-rich salt lakes:A Li-H-O isotopic and geochemical study from northern Tibetan Plateau

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Geoscience Frontiers 2024年第2期15卷 315-333页

作者： Fei Xue Hongbing Tan Xiying Zhang MSantosh Peixin Cong Lu Ge Chao Li Guohui Chen Yu Zhang School of Earth Sciences and Engineering Hohai UniversityNanjing 210098PR China key laboratory of Comprehensive and Highly Efficient utilization of Salt lake resources Qinghai Provincial Key Laboratory of Geology and Environment of Salt LakesQinghai Institute of Salt LakesChinese Academy of SciencesQinghai 810008PR China School of Earth Sciences and resources China University of Geosciences BeijingBeijing 100083PR China Department of Earth Sciences University of AdelaideSA 5005Australia Yonsei Frontier Lab Yonsei UniversitySeoul 0372Korea

Lithium(Li),a crucial mineral resource for modern high-tech industries,is notably abundant in the northern Tibetan Plateau,primarily within lithium-rich salt ***,the exploration and development of these resources are hindered due to an incomplete understanding of their nature and *** we present results from a comprehensive study on the hydrochemical parameters,whole-rock geochemistry,H-O isotopes,and Li concentrations in surface brine,river water,geothermal springs,and associated rocks from two representative lithium-enriched salt lakes,the Laguo Co(LGC)and Cangmu Co(CMC)in Tibet to understand the genetic *** water-salt balance calculations and H-O isotopic analysis reveal that Li in LGC and CMC primarily originates from the Suomei Zangbo(SMZB,~91%)and Donglong Zangbo(DLZB,~75%)rivers,*** is estimated that the LGC and CMC took a minimum of 6.0 ka and 3.0 ka to accumulate their current lithium resources,*** distinct geological characteristics reflect evolutionary differences between the two lakes,suggesting diverse lithium sources and enrichment *** high lithium ion concentration and light lithium isotope composition in the SMZB river waters indicate the genetic relationship with lithium-enriched geothermal springs in the Tibetan *** results suggest that lithium in the LGC originates from lithium-enriched geothermal springs and is primarily supplied through the small-scale SMZB *** contrast,the formation and evolution of CMC are influenced by the northern Lunggar rifts,receiving a prolonged and stable input from the DLZB,resulting in high lithium concentrations and isotopic *** absence of lithium-enriched geothermal springs and the prevalence of silicate rocks in the CMC catchment suggest that lithium may be sourced from the weathering of silicate rocks,such as granitic pegmatite veins containing lithium-rich beryl,widely distributed in the upstream area of *** forward modeling a

关键词： Lithium isotopes Hydrochemistry Salt lakes Enrichment mechanism Tibetan Plateau

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