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Carbon footprint and carbon neutrality pathway of green tea in China

Advances in Climate Change Research 2022年第3期13卷 443-453页

作者： Ming-Bao HE Shi-Xiang ZONG Ying-Chun LI Ming-Ming MA Xin MA Kuo LI Xue HAN Ming-Yue ZHAO Li-Ping GUO Yin-Long XU Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural SciencesBeijing 100081China Beijing Key Laboratory for Forest Pest Control Beijing Forestry UniversityBeijing 100083China

With the rising popularity of the concept of“carbon neutralization”,low-carbon products are likely to gain more *** to this,green tea-an important beverage that is widely consumed in China-along with emissions from planting,processing,and use phase should be given ***,quantifying the carbon footprint(CF)of green tea is an essential task in developing the pathway to carbon *** this study,we quantified the CF and mitigation potential of green tea through life cycle assessment,after which we investigated the pathway toward carbon neutrality in 16 major tea-producing regions(except Hainan and Taiwan)in *** system boundary was divided into six subsystems from cradle to grave:cultivation,processing,transport,packaging,consumption,and *** results showed that the total carbon emissions of green tea reached 44.13 Mt CO_(2)eq in 2019,of which 43%came from consumption and 28%from *** were 18.78 Mt CO_(2)eq emissions from fertilizer production and application,while there was a 7.71 Mt CO_(2)eq carbon sink of tea *** average carbon intensity was 24.30 kg CO_(2)eq kg−1 tea,while Shandong and Guizhou ranked as the top two ***,Hubei,and Yunnan Provinces had the largest amounts of carbon emissions at 6.79,6.14,and 5.96 Mt CO_(2)eq,*** 2030,2050 and 2060,total carbon emissions would be reduced by 46%,63%,and 86%,respectively,under carbon neutrality assumption.A small amount of 6.14 Mt CO_(2)eq carbon emissions was retained to be offset by carbon trading or zero-carbon ***,the results indicate that adopting low-carbon fertilizers and clean energies will be a key entry point for carbon-neutral green tea.

关键词： Carbon neutrality Pathway life cycle assessment Carbon footprint Green tea China

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Comparative carbon emission assessments of recycled and natural aggregate concrete: Environmental influence of cement content

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Geoscience Frontiers 2021年第6期12卷 66-75页

作者： Marian Sabǎu Dan V.Bompa Luis F.O.Silva Department of Civil and Environmental Engineering Universidad de la Costa080020 BarranquillaColombia Department of Civil and Environmental Engineering University of SurreyGuildford GU27XHUK Departamento de Ingeniería Civil y Arquitectura Universidad de LimaAvenida Javier Prado Este 4600Santiago de Surco 1503Peru

This work examines the environmental and geochemical impact of recycled aggregate concrete production with properties representative for structural *** environmental influence of cement content,aggregate production,transportation,and waste landfilling is analysed by undertaking a life cycle assessment and considering a life cycle inventory largely specific for the *** obtain a detailed insight into the optimum life cycle parameters,a sensitivity study is carried out in which supplementary cementitious materials,different values of natural-to-recycled aggregate content ratio and case-specific transportation distances were *** results show that carbon emissions were between 323 and 332 kgCO_(2)e per cubic metre of cement only natural aggregate *** values can be reduced by up to 17%by replacing 25%of the cement with fly *** contrast,carbon emissions can increase when natural coarse aggregates are replaced by recycled aggregates in proportions of 50%and 100%,and transportation is not included in ***,the concrete with 50%recycled aggregate presented lower increase,only 0.3%and 3.4%for normal and high strength concrete,*** some cases,the relative contribution of transportation to the total carbon emissions increased when cement was replaced by fly ash in proportions of 25%,and case-specific transportation distances were *** absolute values,the concrete mixes with 100%recycled aggregates and 25%fly ash had lower carbon emissions than concrete with cement and natural aggregates *** environmental benefits can be obtained when the transportation distances of fly ash are relatively short(15–25 km)and the cement replacement by fly ash is equal or higher than 25%,considering that the mechanical properties are adequate for practical *** observations from this paper show that recycled aggregate concrete with strength characteristics representative for structural members can have lowe

关键词： life cycle assessment Recycled aggregate Natural aggregate Transportation distance OpenLCA

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Towards net zero carbon buildings:Accounting the building embodied carbon and life cycle-based policy design for Greater Bay Area,China

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Geoscience Frontiers 2024年第3期15卷 284-297页

作者： Hanwei Liang Xin Bian Liang Dong Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Research Center of Urban Sustainable Development/School of Geographical Sciences Nanjing University of Information Science&Technology(NUIST)Nanjing 210044China Department of Architecture and Civil Engineering Chalmers University of TechnologySE-41296 GothenburgSweden Shenzhen Research Institute(SRI) City University of Hong KongShenzhenChina Department of Public and International Affairs(PIA) City University of Hong Kong999077Hong Kong Special Administrative Region School of Energy and Environment(SEE) City University of Hong Kong999077Hong Kong Special Administrative RegionChina Centre for Public Affairs and Law City University of Hong Kong999077Hong Kong Special Administrative RegionChina

Carbon mitigation of buildings is critical to promote a net-zero *** international society has vigorously promoted“Net Zero Carbon Buildings”across the globe,and accounting for building carbon emissions is critical to support this *** carbon,which represents carbon emissions from the entire lifecycle of the buildings,is fundamental for realizing the idea of zero ***,only limited studies have been conducted so far that take into account the city *** paper aimed to act as a first try to account for the embodied carbon emissions in buildings in 2020 for the Guangdong-Hong Kong Macao Greater Bay Area in China(GBA).We integrated remote sensing techniques such as night-time light data(NLT)and building material flows analysis to calculate and spatialize the newly generated building material stocks(MS).Based on the MS data,we further applied life cycle assessment(LCA)to assess the embodied carbon in the *** results highlighted that over 163 million tons of embodied carbon in buildings of GBA are expected to be generated,from 497 million tons of newly generated building MS in *** embodied carbon in each life cycle stage is valuable for further lifecyclebased policy designs for:(i)supporting the updating of the green building certification system with consideration of the embodied carbon;(ii)promoting the green building material application and certification;and(iii)reducing the embodied carbon intensity from compact urban planning policy,such as the urban agglomeration policies in *** goal of this paper was to shed a light on reducing carbon emissions from the perspective of the entire lifecycle and promote the development of net zero carbon buildings in China and Asia-Pacific.

关键词： Net zero carbon building Embodied carbon life cycle assessment life cycle-based policies Greater Bay area

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Carbon emission quantification and reduction in pavement use phase:A review

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Journal of Traffic and Transportation Engineering(English Edition) 2024年第1期11卷 69-91页

作者： Linjie Zhu Jin Li Feipeng Xiao Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji UniversityShanghai 201804China

The carbon emissions arising from road pavement infrastructures have emerged as critical issue in recent *** life cycle of a pavement can be divided into five phases,namely raw materials and production,construction,use,maintenance and end of *** the use phase generates the highest carbon emissions throughout the pavement's life cycle,it is usually neglected in most pavement life cycle assessment(LCA)studies due to its complexity and ***,this review selected 126 relevant references,focuses on quantification methods,influential factors and reduction technologies of carbon emissions in pavement use *** the carbon accounting approached,the LCA approach,remains the most widely used for evaluating the environmental impact of ***,the primary influential factors on the use phase'carbon emission include pavement-vehicle interaction primarily affected by pavement roughness,pavement albedo and climate *** influential factors above indirectly cause changes in carbon emissions by influencing the pavement performance and subsequent vehicle ***,the review surveys carbon emission reduction technologies during pavement use phase,focusing mainly on reducing pavement rolling resistance and constructing cool *** pavements and permeable pavements are the most widely used cool pavement ***,the aspects involved in this paper hold significant promise for quantifying and reducing carbon emissions in the pavement use phase.

关键词： Pavement Carbon emission life cycle assessment Use phase Emission reduction

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Environmental impacts of domestic resource extraction in China

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Ecosystem Health and Sustainability 2019年第1期5卷 67-78,I0013页

作者： Shen Zhao He-Ming Wang Wei-Qiang Chen Dong Yang Jing-Ru Liu Feng Shi State Environmental Protection Key Laboratory of Eco-Industry Northeastern UniversityShenyangChina Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of ScienceXiamenFujianChina Xiamen Key Lab of Urban Metabolism XiamenFujianChina SDAS Key Laboratory of Scientific Decision-Making Institute of Science and Technology for Development of ShandongQilu University of Technology(Shandong Academy of Sciences)JinanChina Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijingChina

Introduction:The rapid development of economy has led to extensive raw material consumption and relevant environmental damage in *** analyze environmental impacts and identify materials resulting in these environmental effects via raw material extraction,we combine economy-wide material flow accounting and life-cycle analysis methods to estimate environmental impacts of Chinese domestic extraction(DE)during the period of 1992–*** relationship between these increasing environmental impacts and Chinese GDP was also explored by decoupling ***:Results show that Chinese DE increased by 372%during 1992–*** global warming potential,abiotic depletion potential,and respiratory inorganics of Chinese DE increased by 195%,46%,and 408%,*** terms of specific materials,extraction of iron ores,gravel and sand,and coal induced the most environmental *** relationship between environmental impacts and Chinese GDP/DE was characterized by relative ***:To minimize the environmental impacts of extraction,we recommend that the Chinese government improve its extraction techniques and reduce excess demand for materials with large extraction such as iron ores,gravel and sand,and *** also recommend researching alternative materials for scarce resources like molybdenum,gold,and fluorite.

关键词： Decoupling analysis economy-wide material flow accounting life cycle assessment environmental impact material flows

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Carbon footprinting of carbon capture and -utilization technologies: discussion of the analysis of Carbon XPRIZE competition team finalists

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Clean Energy 2021年第4期5卷 587-599页

作者： Sylvia Sleep Raghav Munjal Michael Leitch Marcius Extavour Adriana Gaona Shah Ahmad Emily Nishikawa Vaidehi Pitre Peter Psarras Andrea Ramirez Heather L.MacLean Joule A.Bergerson Department of Chemical and Petroleum Engineering University of CalgaryCalgaryABCanada XPRIZE Foundation Culver CityCAUSA Department of Civil&Mineral Engineering University of TorontoTorontoONCanada Department of Agricultural Food&Nutritional ScienceUniversity of AlbertaEdmontonABCanada Department of Chemical and Biomolecular Engineering University of PennsylvaniaPhiladelphiaPAUSA Department of Engineering Systems and Services Delft University of TechnologyDelftCNThe Netherlands

life cycle assessments(LCAs)of early-stage technologies can provide valuable insights about key drivers of emissions and aid in prioritizing research into further emissions-reduction *** this potential value,further development of LCA methods is required to handle the increased uncertainty,data gaps,and confidentially of early-stage *** study presents a discussion of the life cycle carbon footprinting of technologies competing in the final round of the NRG COSIA Carbon XPRIZE competition-a US$20 million competition for teams to demonstrate the conversion of CO_(2) into valuable products at the scale of a small industrial pilot using consistent deployment conditions,boundaries,and methodological *** competition allowed the exploration of how LCA can be used and further improved when assessing disparate and early-stage *** intensity estimates are presented for two conversion pathways:(i)CO_(2) mineralization and(ii)catalytic conversion(including thermochemical,electrochemical,photocatalytic and hybrid process)of CO_(2),aggregated across teams to highlight the range of emissions intensities demonstrated at the pilot for individual life cycle stages.A future scenario is also presented,demonstrating the incremental technology and deployment conditions that would enable a team to become carbon-avoiding relative to an incumbent process(*** emissions relative to a reference pathway producing a comparable product).By considering the assessment process across a diverse set of teams,conversion pathways and products,the study presents generalized insights about opportunities and challenges facing carbon capture and-utilization technologies in their next phases of deployment from a life cycle perspective.

关键词： CCUS life cycle assessment carbon footprinting carbon capture and utilization

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A Literature Review on Sustainability of Bio-Based and Biodegradable Plastics:Challenges and Opportunities

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Energy Engineering 2022年第4期119卷 1611-1647页

作者： Taofeeq D.Moshood Gusman Nawanir Fatimah Mahmud Fazeeda Mohamad Mohd Hanafiah Ahmad Airin AbdulGhani Faculty of Industrial Management Universiti Malaysia PahangMalaysia

This study examines the literature on bio-based and biodegradable plastics published between 2000 and 2021 and provides insights and research suggestions for the *** study gathers data from the Scopus and ISI Web of Science databases,then picks 1042 publications objectively and analyses their ***,144 papers from the Web of Science are analysed to present insights and classifications of the literature based on content analyses,including assessment/evaluation of the sustainability of bio-based and biodegradable Plastics,sustainability of biodegradable Plastics,and factors driving the uptake of biodegradable *** study finds that most research on bio-based and biodegradable plastic film evaluations considered only one dimension of sustainability,few considered two dimensions,and very few considered three ***,in recent years,academic and industrial interest has grown dramatically in biodegradable plastics towards *** triple bottom line method in this report(economic benefit,social responsibility,and environmental protection)was employed to assess the biodegradable plastics towards *** journals,Influential authors,top contributing institutions,top contributing nations,and contributions by fields are all identified in this *** research gives a detailed but straightforward theoretical design of bio-based and biodegradable *** study’s results and future research initiatives provide a new path for further investigation and contribution to the field.

关键词： Biodegradable plastic bioplastic influential factors life cycle assessment biopolymers triple bottom line(TBL)

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ENERGY CONSUMPTION,ENVIRONM ENTAL IMPACTS AND EFFECTIVE MEASURES OF GREEN OFFICE BUILDINGS:Alife cycle APPROACH

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Journal of Green Building 2015年第4期10卷 161-177页

作者： Guozhu Mao Hao Chen Huibin Du Jian Zuo Stephen Pullen Yuan Wang School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300072China College of Management and Economics Tianjin UniversityTianjin 300072China Center for Energy&Environmental Policy Research Institute of Policy and ManagementChinese Academy of SciencesBeijing 100190China School of Architecture&Built Environment EntrepreneurshipCommercialisation and Innovation Centre(ECIC)The University of AdelaideAdelaide 5005Australia School of Natural and Built Environments University of South AustraliaAdelaide 5001Australia

The last few decades have witnessed a rapid development of green buildings in China especially the office *** life cycle assessment(LCA)approach has potential to weigh the benefits and costs associated with green building ***,the LCA method evaluates the costs and benefits across a building’s life cycle with a system *** this study,a green office building in Beijing,China,was analyzed by life cycle assessment to quantify its energy use and evaluate the environmental impacts in each life cycle *** environmental impacts can be reduced by 7.3%,1.6%and 0.8%by using 30%gas-fired electricity generation,increasing the summer indoor temperature by 1℃,and switching off office equipment and lighting during lunchtime,***,by reusing 80%of the selected materials when the building is finally demolished,the three major adverse environmental impacts on human health,ecosystem quality,and resource depletion can be reduced by 11.3%12.7%,and 7.1%*** analysis shows that electricity conservation is more effective than materials efficiency in terms of a reduction in environmental *** findings are useful to inform decision makers in different stages of the green building life cycle.

关键词： green office building life cycle assessment energy consumption environmental impacts

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Environmental impacts concerning flexible power generation in a biogas production

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Carbon Resources Conversion 2019年第2期2卷 117-125页

作者： O.Hijazi S.Tappen M.Effenberger Agricultural Systems Engineering Technical University of MunichCenter of Life and Food Sciences85354 FreisingGermany Bavarian State Research Center for Agriculture Institute for Agricultural Engineering and Animal HusbandryFreisingGermany

Combined heat-and-power units(CHPUs)of biogas plants can be operated at partial load or in intervals to respond to market conditions or interventions by the grid *** this study,we present calculations for the specific greenhouse gas(GHG)emissions of electricity from biogas driven CHPUs in dependence of engine *** the methodology of life cycle assessment and using measured data from five real-world biogas plants in Bavaria,we investigated the following scenarios for the operation of the CHPU:(1)full load,(2)80%load response and(3)60%load *** system boundary included the whole biogas production chain,starting from the production/supply of the input materials and ending at the supply of electricity(functional unit:1 kWh of electrical energy fed into the grid).As electrical efficiency and engine load are positively correlated,partial-load operation results in higher specific GHG emissions of electricity from *** impact of decreasing efficiency of the CHPU under partial load on overall specific GHG emissions turned out to be higher than the influence of methane slip from the ***,the increase of further efficiencies such as higher yields,efficient use of synthetic and organic fertilizers,as well as minimization of fuel consumption and the use of regenerative fuels also lead to further decrease of GHG emissions.

关键词： life cycle assessment Biogas plant CHP unit Flexibility Electricity Load response Interval GHG emissions

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Environmental sustainability opportunity and socio-economic cost analyses of phosphorus recovery from sewage sludge

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Environmental Science and Ecotechnology 2023年第4期16卷 135-146页

作者： Jiawen Xie Xingchen Zhuge Xixi Liu Qian Zhang Yiwen Liu Peizhe Sun Yingxin Zhao Yindong Tong School of Environmental Science and Engineering Tianjin UniversityTianjin300072China Robert M.Buchan Department of Mining Queen's UniversityKingstonK7L 3N6Canada School of Science Tibet UniversityLhasa850012China

Although phosphorus(P)recovery and management from sewage sludge are practiced in North America and Europe,such practices are not yet to be implemented in ***,we evaluated the environmental sustainability opportunity and socio-economic costs of recovering P from sewage sludge by replacing the current-day treatments(CT;sludge treatment and landfill)and P chemical fertilizer application(CF)in China using life cycle assessment and life cycle costing *** potential P recovery scenarios(PR1‒PR3:struvite,vivianite,and treated sludge)and corresponding current-day scenarios(CT1‒CT3 and CF)were *** indicated that PR1 and PR2 have smaller environmental impacts than the current-day scenarios,whereas PR3 has larger impacts in most ***3 has the lowest net costs(sum of internal costs and benefits,39.1-54.7 CNY per kg P),whereas PR2 has the lowest external costs(366.8 CNY per kg P).Societal costs for production and land use of 1 kg P by P recovery from sewage sludge(e.g.,∼527 CNY for PR1)are much higher than those of P chemical fertilizers(∼20 CNY for CF).However,considering the costs in the current-day treatments(e.g.,∼524 CNY for CT1),societal costs of P recovery scenarios are close to or slightly lower than those of current-day *** the three P recovery scenarios,we found that recovering struvite as P fertilizer has the highest societal *** study will provide valuable information for improved sewage sludge management and will help promote the sustainable supply of P in China.

关键词： Phosphorus recovery Sewage sludge life cycle assessment Environmental impacts Societal costs

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