检索结果-南通市图书馆

The phytolith carbon sequestration in terrestrial ecosystems:the underestimated potential of bamboo forest

ecological Processes 2023年第1期12卷 872-883页

作者： Xuekun Cheng Huiru Lv Shuhan Liu Chong Li Pingheng Li Yufeng Zhou Yongjun Shi Guomo Zhou State key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityLin’anHangzhou 311300China zhejiang province key think tank:institute of ecological civilization Zhejiang A&F UniversityLin’anHangzhou 311300China key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration of zhejiang province Zhejiang A&F UniversityLin’anHangzhou 311300China School of Environmental and Resources Science Zhejiang A&F UniversityLin’anHangzhou 311300China

Background Terrestrial ecosystems contain significant carbon storage,vital to the global carbon cycle and climate *** in human production activities and environmental factors affect the stability of carbon storage in *** sequestration in plant phytoliths offers a sustainable method for long-term carbon *** occluded in phytoliths(PhytOC)is a kind of carbon that can be stable and not decomposed for a long time,so it is crucial to conduct more in-depth research on *** We undertook a meta-analysis on PhytOC across global terrestrial ecosystems,analyzing 60 articles,encapsulating 534 *** observed notable differences in phytolith and PhytOC contents across various *** forest ecosystems exhibited the highest vegetation phytolith and PhytOC content,while soil phytolith content was most prominent in bamboo forests and PhytOC content in *** activities,such as grassland grazing,had a lesser impact on soil PhytOC transport than actions like cutting and tillage in croplands and *** study separated bamboo ecosystems,analyzing their PhytOC content and revealing an underestimation of their carbon sink *** Notwithstanding our findings,phytoliths’intricate environmental interactions warrant further exploration,crucial for refining ecosystem management and accurately estimating PhytOC *** deepened understanding lays the foundation for studying phytoliths and the carbon sink dynamics.

关键词： Carbon sequestration Phytoliths PhytOC Terrestrial ecosystem Soil carbon

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Most root-derived carbon inputs do not contribute to long-term global soil carbon storage

引用

Science China Earth Sciences 2023年第5期66卷 1072-1086页

作者： Guocheng WANG Liujun XIAO Ziqi LIN Qing ZHANG Xiaowei GUO Annette COWIE Shuai ZHANG Mingming WANG Songchao CHEN Ganlin ZHANG Zhou SHI Wenjuan SUN Zhongkui LUO institute of Agriculture Remote Sensing and Information Technology College of Environmental and Resource SciencesZhejiang UniversityHangzhou310058China LAPC Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China School of Atmospheric Sciences Guangdong Province Key Laboratory for Climate Change and Natural Disaster StudiesSun Yat-sen UniversityZhuhai519082China New South Wales Department of Primary Industries University of New EnglandArmidaleNSW2351Australia State key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing210008China Academy of ecological civilization Zhejiang UniversityHangzhou310058China key Laboratory of Environment Remediation and ecological Health Ministry of EducationZhejiang UniversityHangzhou310058China State key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing100093China key Laboratory of Agricultural Remote Sensing and Information System Zhejiang ProvinceHangzhou310058China

Plant root-derived carbon(C)inputs(I_(root))are the primary source of C in mineral bulk ***,a fraction of I_(root)may lose quickly(I_(loss),e.g.,via rhizosphere microbial respiration,leaching and fauna feeding)without contributing to long-term bulk soil C storage,yet this loss has never been quantified,particularly on a global *** this study we integrated three observational global data sets including soil radiocarbon content,allocation of photo synthetically assimilated C,and root biomass distribution in 2,034 soil profiles to quantify I_(root)and its contribution to the bulk soil C *** show that global average I_(root)in the 0-200 cm soil profile is 3.5 Mg ha^(-1)yr^(-1),~80%of which(i.e.,I_(loss))is lost rather than co ntributing to long-term bulk soil C storage.I_(root)decreases exponentially with soil depth,and the top 20 cm soil contains>60%of total I_(root).Actual C input contributing to long-term bulk soil storage(i.e.,I_(root)-I_(loss))shows a similar depth distribution to I_(root).We also map I_(loss)and its depth distribution across the *** results demonstrate the global significance of direct C losses which limit the contribution of I_(root)to bulk soil C storage;and provide spatially explicit data to facilitate reliable soil C predictions via separating direct C losses from total root-derived C inputs.

关键词： Carbon inputs Root biomass Soil organic carbon Depth distribution Bulk soil carbon Radiocarbon

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Zeolite-mediated hybrid Cu^(+)/Cu~0 interface for electrochemical nitrate reduction to ammonia

引用

Journal of Energy Chemistry 2023年第12期87卷 136-143,I0005页

作者： Jiabao Lv Angjian Wu Liang Wang Yunhao Zhong Zhihao Zeng Qunxing Huang Xiaoqing Lin Hao Zhang Shaojun Liu Qian Liu Songqiang Zhu Xiaodong Li Jianhua Yan Zhifu Qi Hao Bin Wu State key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027ZhejiangChina Baima Lake Laboratory Hangzhou 310053ZhejiangChina Laboratory of Clean Energy and Carbon Neutrality of zhejiang province Jiaxing Research InstituteZhejiang UniversityJiaxing 314031ZhejiangChina key Lab of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina institute for Composites Science Innovation(InCSI)and State key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina

The electrocatalytic conversion of reactive nitrogen species to ammonia is a promising strategy for efficient NH_(3) *** this study,we reveal that the hybrid Cu^(+)/Cu~0 interface is catalytically active for electrochemical ammonia synthesis from nitrate *** maintain the hybrid Cu^(+)/Cu~0 state at negative reaction potentials,hydrophilic zeolite is used to modify Cu/Cu_(2)O electrocatalyst,which demonstrates an impressive NH_(3) production rate of 41.65 mg h^(-1) cm^(-2)with ~100% Faradaic efficiency of ammonia synthesis at-0.6 V ***-situ Raman spectroscopy unveil the high activity originates from the zeolite reconstruction at the electrode–electrolyte interface,which protects the valence state of Cu~0/Cu^(+) site under negative potential and promotes electrochemical activity towards NH_(3) synthesis.

关键词： Electrochemical nitrate reduction reaction Ammonia synthesis In-situ Raman spectroscopy Zeolite Density functional theory

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A comparative study of methods for remediation of diesel-contaminated soil

引用

Journal of zhejiang University-Science A(Applied Physics & Engineering) 2021年第10期22卷 792-804页

作者： Fan-xu MENG Yan SONG Li-juan MAO Wen-jun ZHOU Dao-hui LIN Department of Environmental Science Zhejiang UniversityHangzhou 310058China Analysis Center of Agrobiology and Environmental Sciences Zhejiang UniversityHangzhou 310058China The institute of zhejiang ecological civilization Huzhou 313300China

Soil pollution by diesel fuels is a worldwide environmental problem,but little research has been carried out into on-site techniques for remediation of soil polluted by waste *** study compared chemical oxidation and soil washing methods for their efficiency and environmental and economic *** was spiked with 0#diesel to simulate an actual pollution level of about 1260 mg/kg total petroleum hydrocarbon(TPH).Fenton-like oxidation eliminated 90.4%of the TPH with a Fe2+׃H2O2 ratio of 1:10 in 5 d compared with 25.8%removal by the activated persulfate method under the same *** washing tests,sodium dodecylbenzenesulfonate and Tween 80 were both unsuitable for TPH washing,while ultrapure water removed 36.1%of TPH in 75 *** the Fenton-like oxidation technique met remediation goals based on the screening values of the Guideline for Risk Assessment of Contaminated *** environmental impact and economic assessment of techniques demonstrated the superiority of water washing for dealing with low-degree TPH contamination.

关键词： Total petroleum hydrocarbon(TPH) Chemical oxidation Soil washing Environmental risk Soil remediation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multi-proxy evidence of environmental change related to collapse of the Liangzhu Culture in the Yangtze Delta,China

引用

Science China Earth Sciences 2021年第6期64卷 890-905页

作者： keyang HE Houyuan LU Guoping SUN Xiang JI Yonglei WANG Kaikai YAN Xinxin ZUO Jiangping ZHANG Bin LIU Ningyuan WANG key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing100029China Center for Excellence in Tibetan Plateau Earth Sciences Chinese Academy of SciencesBeijing100101China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing100049China zhejiang Provincial institute of Cultural Relics and Archaeology Hangzhou310014China State key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian province Fujian Normal UniversityFuzhou350007China

The Liangzhu Culture(5300–4300 cal.a BP)has been regarded as the culmination of the Neolithic Age in the Yangtze Delta and as an archaic ***,the reason behind the collapse of the Liangzhu Culture remains *** scholars attributed it to social conflicts or foreign invasions,while others suggested that environmental deterioration,such as cold episodes,inundation and palaeo-typhoon events,disrupted the ***,the yellowish silty sediments widely overlying the Liangzhu group sites have been presumed to be one of the vital clues to resolving these *** process and cause of their formation are key to understanding the decline in the Liangzhu *** this study,two typical profiles composed of the Liangzhu cultural layer and yellowish silty sediments were collected in Liangzhu Ancient *** proxies,including pollen,phytoliths and diatoms,along with radiocarbon and optically stimulated luminescence dating and synthesized geochemical evidence from different sediments,were applied to reconstruct ecological and hydrological changes and discuss their linkage to cultural *** regional ecology was typical freshwater wetlands during 4800–4400 cal.a BP,which facilitated rice farming and large-scale architectural engineering in Liangzhu Ancient *** from microfossils and dating of the yellowish silty sediments indicated that Liangzhu Ancient City was significantly affected by seawater after abandonment during 4300–3400 cal.a ***,geochemical evidence,including trace element and Sr-Nd isotopic compositions,suggested that the primary provenance of the yellowish silt was a mixture of sediments from the Qiantang River,East China Sea,Yangtze River and Yellow River,which had been transported to Liangzhu Ancient City by the Yellow Sea Coastal Current and a marine ***,based on evidence from archaeological sites and numerical simulation in the Yangtze Delta,it was supposed that the short-term

关键词： Collapse of the Liangzhu Culture Yangtze Delta Yellowish silt Microfossils Geochemistry

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Global methyl halide emissions from biomass burning during 2003-2021

引用

Environmental Science and Ecotechnology 2023年第2期14卷 79-86页

作者： Xiaoyi Hu Di Chen Liting Hu Bowei Li Xinhe Li Xuekun Fang College of Environmental&Resource Sciences Zhejiang UniversityHangzhouZhejiang310058PR China State key Joint Laboratory for Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing100871PR China Center for Global Change Science Massachusetts Institute of TechnologyCambridgeMA02139USA

Methyl halides(CH3Cl,CH3Br,and CH3I)are ozone-depleting *** burning(BB)is an important source of methyl *** temporal variations and global spatial distribution of BB methyl halide emissions are ***,global methyl halide emissions from BB during 2003e2021 were estimated based on satellite data.A significant decreasing trend(p<0.01)in global methyl halide emissions from BB was found between 2003 and 2021,with CH3Cl emissions decreasing from 302 to 220 Gg yr^(-1),CH3Br emissions decreasing from 16.5 to 11.7 Gg yr^(-1),and CH3I emissions decreasing from 8.9 to 6.1 Gg yr^(-1).From a latitudinal perspective,the northern high-latitude region(60e90N)was the only latitude zone with significant increases in BB methyl halide emissions(p<0.01).Based on an analysis of the drivers of BB methyl halide emissions,emissions from cropland,grassland,and shrubland fires were more correlated with the burned area,while BB emissions from forest fires were more correlated with the emissions per unit burned *** non-BB emissions of CH3Cl increased from 4749 Gg yr^(-1)in 2003 to 4882 Gg yr^(-1)in 2020,while those of CH3Br decreased from 136 Gg yr^(-1)in 2003 to 118 Gg yr^(-1)in 2020(global total CH3I emissions are not available).The finding indicates that global CH3Cl and CH3Br emissions from sources besides BB increased and decreased during *** on our findings,not only searching for unknown sources is important,but also re-evaluating known sources is necessary for addressing methyl halide emissions.

关键词： Methyl halides Biomass burning Emission inventory Global budget Ozone depletion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pioneering observation of atmospheric volatile organic compounds in Hangzhou in eastern China and implications for upcoming 2022 Asian Games

引用

Journal of Environmental Sciences 2023年第2期124卷 723-734页

作者： Bowei Li Steven Sai Hang Ho Xinhe Li Liya Guo Rui Feng Xuekun Fang College of Environmental&Resource Sciences Zhejiang UniversityHangzhou 310058China Division of Atmospheric Sciences Desert Research InstituteRenoNevada89512USA Center for Global Change Science Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA

Understanding the emission sources of volatile organic compounds(VOCs)is critical for air pollution *** measurements of atmospheric VOCs were conducted from January to February in Hangzhou in *** average measured concentration of total VOCs(TVOCs)was 38.2±20.9 ppb,>42% lower than that reported by previous studies at the urban center in *** VOC concentrations and proportions were similar between weekdays and *** the long holidays of the Spring Festival in China,the concentrations of TVOCs were∼50% lower than those during the regular days,but their profiles showed no significant difference(p>0.05).Further,we deduced that aromatics and alkenes were the most crucial chemicals promoting the formation of O3 and secondary organic aerosol(SOA)in *** to interspecies correlations,combustion processes and solvent use were inferred as major VOC emission *** study provides implications for air quality improvements before and during the upcoming Asian Games that will be hosted in Hangzhou in 2022.

关键词： VOCs Atmospheric observation Eastern China 2022 Asian game Air quality improvements

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：