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Optimization of national food production layout based on comparative advantage index

Energy Procedia 2019年 158卷 3846-3852页

作者： Yating Liu Saige Wang Bin Chen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 P.R. China

A large amount of land and water was needed for food production. In China, the geographical mismatch of land and water resources is increasing the structural tensions among spatial water and land reallocation in national food supply chain. Unreasonable national food production layout would threat land and water security. To improve food production self-sufficiency, an optimization model of national food production layout was established based on the agricultural food production comparative advantage index (ACI) and the linear programming optimization. ACI was built based on the local land, water endowment and socio-economic features, to evaluate the suitability for agricultural food production in each province. In this study, the objective function is maximization of the provincial agricultural food production comparative advantage index, and minimization of the provincial water and land footprint of agricultural food production. The constraint condition includes the natural resources, social demand, ecological environment and production condition. The optimal results showed that the maize production in Tianjin, Shanxi and Shaanxi has an obvious decrease and the production of soybean in Guangdong, Hainan and Yunnan increase after optimization. The corresponding adapting strategy was suggested to ensure the land, water security as well as sustainable food supplying. The objective of this study is to illustrate how an optimization model could be possibly used to adapt unreasonable food production layout for achieving the synergies between land, water and food.

关键词： food production optimization food security water security land conservation

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A three-scale input-output analysis of blue and grey water footprint for Beijing-Tianjin-Hebei Urban Agglomeration

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Energy Procedia 2019年 158卷 4049-4054页

作者： Zhenzhen Tian Saige Wang Bin Chen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 P.R. China

As the most economically developed urban agglomeration in North China, Beijing-Tianjin-Hebei region has been experiencing increasing water scarcity due to the growing economy and increasing water-intensive patterns. Given this, we built an urban three-scale water footprint model based on three-scale input-output analysis for an urban complex socioeconomic system. In this model, the sources and sinks of every sector’s economic flow were all divided into three scales(urban, domestic and foreign). We investigated the blue and grey water footprint of the economy in 2012 of the Jing-Jin-Ji agglomeration. The result showed that from the perspective of final demand, the urban consumption consumes the largest value of blue water of 4.75×10 9 m³, and the blue water embodied in government consumption accounts to 1.6×10 9 m³, in which foreign, domestic and local consumption account for 0.16%, 0.02% and 99%, respectively. And from the perspective of domestic and foreign trade, almost all sectors are net blue water exporters, and the agriculture sector was the biggest grey water exporter, holding volume of 1.37×10 11 m³. By incorporating three-scale input-output model into urban agglomeration water footprint, we analyzed the role of sectors and regions in the water network based on their import and export from other regional and international nodes. We aim to provide insights for water consumers inside and outside the urban agglomeration into rebalancing water resource use and diminishing water scarcity.

关键词： Three-scale input-output analysis Water footprint Jing-Jin-Ji urban agglomeration

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Energy return on investment, energy payback time, and greenhouse gas emissions of coal seam gas(CSG) production in China: a case of the Fanzhuang CSG project

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Petroleum Science 2018年第1期15卷 185-199页

作者： Zhao-Yang Kong Xiu-Cheng Dong Xi Lu Xin Wan School of Business Administration China University of Petroleum (Beijing) School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University School of Economics and Management Beijing University of Chemical Technology

The studies and development of coal seam gas（CSG） have been conducted for more than 30 years in China, but few of China＇s CSG projects have achieved large-scale commercial success; faced with the boom of shale gas, some investors are beginning to lose patience and confidence in CSG. China currently faces the following question： Should the government continue to vigorously support the development of the CSG industry？ To provide a reference for policy makers and investors, this paper calculates the EROI_（stnd）[a standardized energy return on investment（EROI） method], EROI_（ide）（the maximum theoretical EROI）, EROI_（3,i）（EROI considering the energy investment in transport）, and EROI_（3,1＋e）（EROI with environmental inputs） of a single vertical CSG well in the Fanzhuang CSG project in the Qinshui Basin. The energy payback time（EPT） and the greenhouse gas（GHG） emissions of the CSG systems are also calculated. The results show that over a 15-year lifetime, EROI_（stnd）, EROI_（ide）, EROI_（3,1）, and EROI_（3,1＋e）are expected to deliver EROIs of approximately11：1, 20：1, 7：1, and 6：1, respectively. The EPT within different boundaries is no more than 2 years, and the life-cycle GHG emissions are approximately 18.8 million kg CO_2 equivalent. The relatively high EROI and short EPT indicate that the government should take more positive measures to promote the development of the CSG industry.

关键词： Coal seam gas EROI Energy payback time Greenhouse gas emissions Global warming potential China

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Water shortage risk transferred through interprovincial trade in Northeast China

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Energy Procedia 2019年 158卷 3865-3871页

作者： Tao Cao Saige Wang Bin Chen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 P.R. China

With active interprovincial economic trade, water resources embodied in economic goods and services are also transferred. In China, water resources are uneven spatial distributed and many regions are facing serious water shortage. As the spatial mismatch of water resources and water consumers, provincial water shortage risk are changing by transferring in or out water resources in wetter regions or drier regions. In this study, we constructed a water shortage risk trade model to assess one region’s (sector’s) potential economic output reduction induced by its economic trade partners’ water shortage. Take Northeast China (including Heilongjiang, Jilin and Liaoning province, namely HJL region) as a case study, we figured out the provinces that have larger risk on HJL region’s sectoral economic output and the main provinces influenced by HJL region’s water shortage. Finally, we analyzed the water shortage risk transfer among sectors in HJL region. The results show that risk from HJL region is mainly transferred to coastal regions and a large quantity of virtual water shortage risk (VWSR) are transferred among sectors in this region due to the intensive trade activities within this region. Water shortage in Heilongjiang transferred larger risk to other provinces than Jilin and Liaoning, while vulnerability index of Liaoning is higher than Heilongjiang, Jilin, which is vulnerable to water shortage in Heilongjiang, Jilin and Beijing. This study can provide insights for local water security management through identifying the key provinces and trade pathways to reduce water risk and avoid water risk transferring to improve the intersectoral and interprovincial water coordinated management for achieving national water sustainable supplying.

关键词： water shortage risk Northeast China Multi-regional input-output analysis water management

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Identification of Direct Anchoring Sites for Monoatomic Dispersion of Precious Metals (Pt, Pd, Ag) on CeO2Support

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Angewandte Chemie 2024年第11期136卷

作者： Dr. Fei Wang Prof. Kai Li Bolang Li Chunxue Wang Zhao Li Dr. Yan Zhang Prof. Wenpo Shan Prof. Yunbo Yu Prof. Changbin Zhang Prof. Qiang Fu Prof. Ping Ning Prof. Joseph S. Francisco Prof. Xiao Cheng Zeng Prof. Hong He Faculty of Environmental Science and Engineering Kunming University of Science and Technology Kunming 650500 China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Department of Chemistry University of Pennsylvania Philadelphia PA 19104 USA Department of Materials Science & Engineering City University of Hong Kong Kowloon 999077 Hong Kong

Monoatomic dispersion of precious metals on the surface of CeO 2 nanocrystals is a highly practical approach for dramatically reducing the usage of precious metals while exploiting the unique properties of single-atom catalysts. However, the specific atomic sites for anchoring precious metal atoms on the CeO 2 support and underlying chemical mechanism remain partially unknown. Herein, we show that the terminal hydroxyls on the (100) surface are the most stable sites for anchoring Ag atoms on CeO 2 , indicating that CeO 2 nanocubes are the most efficient substrates to achieve monoatomic dispersion of Ag. Importantly, the newly identified chemical mechanism for single-metal-atom dispersion on CeO 2 nanocubes appears to be generic and can thus be extended to other precious metals (Pt and Pd). In fact, our experiments also show that atomically dispersed Pt/Pd species exhibit morphology- and temperature-dependent CO selectivity in the catalytic CO 2 hydrogenation reaction.

关键词： Single-metal-atom Generic Anchoring mechanism CeO2 Terminal hydroxyls CO2 Hydrogenation

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As(III) and As(V) adsorption on nanocomposite of hydrated zirconium oxide coated carbon nanotubes

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Journal of Colloid and Interface Science 2018年 511卷 277-284页

作者： Liu, Dengchao Deng, Shubo Maimaiti, Ayiguli Wang, Bin Huang, Jun Wang, Yujue Yu, Gang School of Environment Beijing Key Laboratory for Emerging Organic Contaminants Control State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC) Tsinghua University Beijing 100084 China

Novel hydrated zirconium oxide (ZrO(OH)2) coated carbon nanotubes (CNTs) were prepared via a filtration-steam hydrolysis method, and were used to remove As(III) and As(V) from drinking water. This adsorbent was charac... 详细信息

Novel hydrated zirconium oxide (ZrO(OH)₂) coated carbon nanotubes (CNTs) were prepared via a filtration-steam hydrolysis method, and were used to remove As(III) and As(V) from drinking water. This adsorbent was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). The ZrO(OH)₂ coated on the surface of CNTs was amorphous, and the coating thickness was in the range of 1–8 nm. The ZrO(OH)₂/CNTs nanocomposite showed high adsorption for both As(III) and As(V) with the maximum adsorption capacities of 78.2 and 124.6 mg/g, respectively, according to the Langmuir fitting. The adsorption capacities of ZrO(OH)₂/CNTs at the equilibrium concentration of 10 μg/L were 2.0 mg/g for As(III) and 7.2 mg/g for As(V) at pH 7, much higher than those of ZrO(OH)₂ nanoparticles. Meanwhile, the adsorption rates of As(III) and As(V) on the ZrO(OH)₂/CNTs were higher than the ZrO(OH)₂ nanoparticles. The spent adsorbent can be regenerated by re-coating ZrO(OH)₂ as the preparation method, and the adsorbed amounts of As(III) and As(V) on the ZrO(OH)₂/CNTs changed little within six cycles. This ZrO(OH)₂/CNTs nanocomposite shows a promising application potential for the removal of As(III) and As(V) from drinking water. © 2017 Elsevier Inc.

关键词： Arsenic removal Filtration-steam hydrolysis method Regeneration ZrO(OH)2/CNTs nanocompsite

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Bio-templated formation of defect-abundant VS_2 as a bifunctional material toward high-performance hydrogen evolution reactions and lithium-sulfur batteries

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Journal of Energy Chemistry 2020年 42卷 34-42页

作者： Guo Tianqi Song Yingze Sun Zhongti Wu Yuhan Xia Yu Li Yayun Sun Jianhui Jiang Kai Dou Shixue Sun Jingyu School of Environment Henan Normal University Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control-Ministry of Education Henan Xinxiang 453007 College of Energy Soochow Institute for Energy and Materials Innovations Soochow University Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Jiangsu Suzhou 215006 College of Materials Science and Engineering Shenzhen University Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advance Technology of Ceramics Guangdong Shenzhen 518060 Institute for Superconducting and Electronic Materials University of Wollongong Australia Wollongong NSW 2522

Transition metal chalcogenides have nowadays garnered burgeoning interest owing to their fascinating electronic and catalytic properties, thus possessing great implications for energy conversion and storage applications. In this regard, their controllable synthesis in a large scale at low cost has readily become a focus of research. Herein we report diatomite-template generic and scalable production of VS_2 and other transition metal sulfides targeting emerging energy conversion and storage applications. The conformal growth of VS_2 over diatomite template would endow them with defect-abundant features. Throughout detailed experimental investigation in combination with theoretical simulation, we reveal that the enriched active sites/sulfur vacancies of thus-derived VS_2 architectures would pose positive impacts on the catalytic performance such in electrocatalytic hydrogen evolution reactions. We further show that the favorable electrical conductivity and highly exposed sites of VS_2 hold promise for serving as sulfur host in the realm of Li-S batteries. Our work offers new insights into the templated and customized synthesis of defect-rich sulfides in a scalable fashion to benefit multifunctional energy applications.

关键词： Bio-templated Vanadium disulfide Defect-abundant Hydrogen evolution reaction Lithium-sulfur batteries

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Source apportionment of PM_(2.5)light extinction in an urban atmosphere in China

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Journal of environmental Sciences 2018年第1期30卷 277-284页

作者： Zijuan Lan Bin Zhang Xiaofeng Huang Qiao Zhu Jinfeng Yuan Liwu Zeng Min Hu Lingyan He Key Laboratory for Urban Habitat Enuironmental Science and Technology School of Enuironment and EnergyPeking University Shenzhen Graduate SchoolShenzhen 518055China Shenzhen Research Academy of Environmental Sciences Shenzhen 518001China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

Haze in China is primarily caused by high pollution of atmospheric fine particulates（PM2.5）.However, the detailed source structures of PM2.5 light extinction have not been well established, especially for the roles of various organic aerosols, which makes haze management lack specified targets. This study obtained the mass concentrations of the chemical compositions and the light extinction coefficients of fine particles in the winter in Dongguan, Guangdong Province, using high time resolution aerosol observation instruments. We combined the positive matrix factor（PMF） analysis model of organic aerosols and the multiple linear regression method to establish a quantitative relationship model between the main chemical components, in particular the different sources of organic aerosols and the extinction coefficients of fine particles with a high goodness of fit（R^2= 0.953）. The results show that the contribution rates of ammonium sulphate,ammonium nitrate, biomass burning organic aerosol（BBOA）, secondary organic aerosol（SOA） and black carbon（BC） were 48.1%, 20.7%, 15.0%, 10.6%, and 5.6%, respectively. It can be seen that the contribution of the secondary aerosols is much higher than that of the primary aerosols（79.4% versus 20.6%） and are a major factor in the visibility decline. BBOA is found to have a high visibility destroying potential, with a high mass extinction coefficient, and was the largest contributor during some high pollution periods. A more detailed analysis indicates that the contribution of the enhanced absorption caused by BC mixing state was approximately 37.7% of the total particle absorption and should not be neglected.

关键词： Fine particles Organic aerosol Positive matrix factorisation Light extinction Multiple linear regression

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Maternal Exposure to Nitrosamines In Drinking Water During Pregnancy And Indices of Fetal Growth In a Chinese Cohort

SSRN

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SSRN 2022年

作者： Luo, Qiong Miao, Yu Liu, Chong Bei, Er Zhang, Jin-Feng Zhang, Ling-Hua Deng, Yan-Ling Qiu, Yu Lu, Wen-Qing Wright, J. Michael Chen, Chao Zeng, Qiang Department of Occupational and Environmental Health School of Public Health Tongji Medical College Huazhong University of Science and Technology Hubei Wuhan China School of Public Health Tongji Medical College Huazhong University of Science and Technology Hubei Wuhan China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing China Maternal and Child Health Care Service Centre of Xiaonan District Hubei Xiaogan China Office of Research and Development U.S. Environmental Protection Agency Center for Public Health and Environmental Assessment CincinnatiOH United States

No human studies have focused on drinking water nitrosamines, a group of emerging unregulated nitrogenous disinfection by-products that exhibits genotoxicity and developmental toxicity in experimental studies. This cohort study included 2457 mother-infant pairs from a single drinking water supply system in central China. The associations of maternal trimester-specific and entire pregnancy exposure of drinking water nitrosamines with indices of fetal growth [birth weight (BW), low birth weight (LBW), small for gestational age (SGA) and preterm delivery (PTD)] were evaluated. Elevated maternal N-nitrosodimethylamine (NDMA) exposure in the second trimester and N-nitrosopiperidine (NPIP) exposure during the entire pregnancy were associated decreased BW and increased risks of PTD [e.g., risk ratio (RR) = 2.16;95% CI: 1.23, 3.79 and 1.66 for the highest vs. lowest tertile of NDMA;p for trend = 0.002]. Elevated maternal exposure of N-nitrosodiethylamine (NDEA) in the second trimester was associated with increased risk of SGA (RR = 1.80;95% CI: 1.09, 2.98 for the highest vs. lowest tertile;p for trend = 0.01). Our study detected associations of maternal exposure to drinking water nitrosamines during pregnancy with decreased BW and increased risks of SGA and PTD. © 2022, The Authors. All rights reserved.

关键词： Potable water

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Maternal Exposure to Nitrosamines In Drinking Water During Pregnancy And Birth Outcomes in a Chinese Cohort

SSRN

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SSRN 2022年

作者： Luo, Qiong Miao, Yu Liu, Chong Bei, Er Zhang, Jin-Feng Zhang, Ling-Hua Deng, Yan-Ling Qiu, Yu Lu, Wen-Qing Michael, J. Wright Chen, Chao Zeng, Qiang Department of Occupational and Environmental Health School of Public Health Tongji Medical College Huazhong University of Science and Technology Hubei Wuhan China School of Public Health Tongji Medical College Huazhong University of Science and Technology Hubei Wuhan China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University Beijing China Maternal and Child Health Care Service Centre of Xiaonan District Hubei Xiaogan China Office of Research and Development U.S. Environmental Protection Agency Center for Public Health and Environmental Assessment CincinnatiOH United States

Maternal exposure to regulated disinfection by-products (DBPs) during pregnancy has been linked with adverse birth outcomes. However, no human studies have focused on drinking water nitrosamines, a group of emerging unregulated nitrogenous DBPs that exhibits genotoxicity and developmental toxicity in experimental studies. This cohort study included 2,457 mother-infant pairs from a single drinking water supply system in central China, and maternal trimester-specific and entire pregnancy exposure of drinking water nitrosamines were evaluated. Multivariable linear and Poisson regression models were used to estimate the associations between maternal exposure to nitrosamines in drinking water and birth outcomes [birth weight (BW), low birth weight (LBW), small for gestational age (SGA) and preterm delivery (PTD)]. Elevated maternal N-nitrosodimethylamine (NDMA) exposure in the second trimester and N-nitrosopiperidine (NPIP) exposure during the entire pregnancy were associated decreased BW (e.g., β = -88.6 g;95% CI: -151.0, -26.1 for the highest vs. lowest tertile of NDMA;p for trend = 0.01) and increased risks of PTD [e.g., risk ratio (RR) = 2.16;95% CI: 1.23, 3.79 and 1.66 for the highest vs. lowest tertile of NDMA;p for trend = 0.002]. Elevated maternal exposure of N-nitrosodiethylamine (NDEA) in the second trimester was associated with increased risk of SGA. Our study detected associations of maternal exposure to drinking water nitrosamines during pregnancy with decreased BW and increased risks of SGA and PTD. These findings are novel but require replication in other study populations. © 2022, The Authors. All rights reserved.

关键词： Potable water

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