A5069219613- Recycling and Waste Management Techniques
- Extraction and Separation Processes
- Environmental Impact and Sustainability
- Sustainable Industrial Ecology
- Silk-based biomaterials and applications
- Metallurgy and Material Science
- Metal Extraction and Bioleaching
- Metallurgical Processes and Thermodynamics
- Silkworms and Sericulture Research
- Mining and Resource Management
- Sustainable Supply Chain Management
- Phosphorus and nutrient management
- Bauxite Residue and Utilization
- Thermoregulation and physiological responses
- Mercury impact and mitigation studies
- Viral Infectious Diseases and Gene Expression in Insects
- Insect Utilization and Effects
- Sports Performance and Training
- Molten salt chemistry and electrochemical processes
- Climate Change Policy and Economics
- Graphite, nuclear technology, radiation studies
- Electric Vehicles and Infrastructure
- Biochemical and Structural Characterization
- Land Use and Ecosystem Services
- Climate Change and Health Impacts
The University of Tokyo
2009-2025
National Institute for Environmental Studies
2016-2025
Institute of Agrobiological Sciences
2002-2021
National Agriculture and Food Research Organization
2019-2021
ORCID
2021
Tohoku University
2004-2014
Ibaraki University
2014
Chiba Institute of Technology
2014
Osaka University
2014
Cardiac Society of Australia and New Zealand
2012
Critical metals are technologically vital to the functionality of various emerging technologies, yet they have a potentially unstable supply. This condition calls for strategic planning based on expected long-term demand and supply these implications attached. Here, we provide first systematic review studies (88 in all) exploring projected status critical materials, covering 48 elements with 546 data points global through 2030 2050. Interestingly, results indicate that, date, no outlook is...
This study, encompassing 231 countries and regions, quantifies the global transfer of three critical metals (neodymium, cobalt, platinum) considered vital for low-carbon technologies by means material flow analysis (MFA), using trade data (BACI) metal contents commodities, resolving optimization problem to ensure balance within each country region. The study shows that in 2005 international led flows 18.6 kt neodymium, 154 402 t platinum identifies main commodities top 50 bilateral links...
Abstract: A general analytical model of materials flow analysis (MFA) incorporating physical waste input‐output is proposed that fully consistent with the mass balance principle. Exploiting triangular nature matrix input coefficients, which obtained by rearranging ordering sectors according to degrees fabrication, material composition derived, gives products. formal mathematical definition (or objects, be accounted for MFA) also introduced, excludes occurrence double accounting in...
Summary The demand for biofuels has recently increased because of rising prices fossil fuels and diversification energy resources. As a result, the sugarcane corn been increasing, not only food production, but also as sources energy. In this context, securing supplies phosphorus, required an essential nutrient in agricultural considerable implications that extend beyond policy. It is therefore important to consider quantity availability phosphorus resources remain untapped, supply phosphate...
In previous studies on the physical chemistry of pyrometallurgical processing aluminum scrap, only a limited number thermodynamic parameters, such as Gibbs free energy change impurity reactions and variation activity an in molten aluminum, were taken into account. contrast, this study we thermodynamically evaluated quantitative removal limit impurities during remelting scrap; all relevant total pressure, coefficient target impurity, temperature, oxygen partial oxidation product, considered....
Substantial amounts of post-consumer scrap are exported to other regions or lost during recovery and remelting, both export losses pose a constraint desires for having regionally closed material cycles. To quantify the challenges trade-offs associated with closed-loop metal recycling, we looked at cycles from perspective single unit trace through several product life Focusing on steel, used current process parameters, loss rates, trade patterns steel cycle study how that was originally...
Meeting the 2-degree global warming target requires wide adoption of low-carbon energy technologies. Many such technologies rely on use precious metals, however, increasing dependence national economies these resources. Among those with supply security concerns are referred to as critical metals. Using Policy Potential Index developed by Fraser Institute, this study a new footprint indicator, mining risk (MRF), quantify directly and indirectly affecting economy through its consumption We...
Even for metals, open-loop recycling is more common than closed-loop due, among other factors, to the degradation of quality in end-of-life (EoL) phase. Open-loop subject loss functionality original materials, dissipation forms that are difficult recover, and recovered metals might need dilution with primary meet requirements. Sustainable management metal resources calls minimization these losses. Imperative this quantitative tracking fate materials across different stages, products, A new...
Economic growth and sometimes the use of green technologies have been associated with a rapid rise in metals minerals. In today's globalized economy, natural resource consumption influences environmental impacts far removed from place consumption. Knowledge about flow substances is fundamental to reducing controlling material cycle. Economy-wide analysis (MFA) an excellent tool quantify balances specific areas for waste management. The goal this study was identify worldwide nickel, copper,...
The global transition to fundamentally decarbonized electricity and transport systems will alter the existing resource flows of both fossil fuels metals; however, such a may have unintended consequences. Here we show that decarbonization sectors curtail fuel production while paradoxically increasing extraction associated with metal by more than factor 7 2050 relative 2015 levels. Importantly, approximately 32–40% this increase in is expected occur countries weak, poor, failing governance,...
This study presents the results of chemical thermodynamic analysis on distribution elements in smelting process metallic materials to examine controllability impurities pyrometallurgical technique. The present work can give an answer against frequently given question; "Which impurity element be removable metallurgical process?" or "How far level controlled?". proposed method was applied estimate 29 for a copper converter and 26 steel-making shows tendency among gas, slag, metal phases as...
Abstract Silk is a protein fiber used to weave fabrics and as biomaterial in medical applications. Recently, genetically modified silks have been produced from transgenic silkworms. In the present study, silkworms for mass production of three colors fluorescent silks, (green, red, orange) are generated using vector originating fibroin H chain gene classical breeding method. The suitability recombinant making investigated by harvesting large amounts cocoons, obtained rearing over 20 thousand...
Summary Alloying elements in steel add a wide range of valuable properties to materials that are indispensable for the global economy. However, they likely be effectively irretrievably blended into when recycled because (among other issues) lack information about composition scrap. This results alloying dissipating slag during steelmaking and/or becoming contaminants secondary steel. We used waste input‐output material flow analysis model quantify unintentional flows (i.e., chromium, nickel,...
To build a life cycle assessment (LCA) database of Japanese products embracing their global supply chains in manner requiring lower time and labor burdens, this study estimates the intensity embodied environmental burden for commodities produced Japan. The is measure generated globally by unit production commodity can be used as inventory data LCA. calculation employs an input–output LCA method with link model that defines system boundary grounded simplified multiregional framework. As...
Spider dragline silk is a natural fiber that has excellent tensile properties; however, it difficult to produce artificially as long, strong fiber. Here, the spider (Araneus ventricosus) protein gene was cloned and transgenic silkworm generated, expressed fusion of fibroin heavy chain in cocoon silk. The content ranged from 0.37 0.61% w/w (1.4–2.4 mol%) native fibroin. Using good silk-producing strain, C515, can make raw its cocoons for first time. characteristics (toughness) improved by 53%...
Steel is not elemental iron but rather a group of iron-based alloys containing many elements, especially chromium, nickel, and molybdenum. recycling expected to promote efficient resource use. However, open-loop steel could result in quality loss nickel molybdenum and/or material chromium. Knowledge about alloying element substance flow needed avoid such losses. Material analyses (MFAs) indicate the importance recovery elements. Flows are interconnected, MFAs have paid little attention...
Metals can in theory be infinitely recycled a closed-loop without any degradation quality. In reality, however, open-loop recycling is more typical for metal scrap recovered from end-of-life (EoL) products because mixing of different species results quality that no longer matches the originals. Further losses occur when meeting requirement target product requires dilution secondary material by adding high purity materials. Standard LCA usually does not address these losses. This paper...
Alloying metals are indispensable ingredients of high quality alloy steel such as austenitic stainless steel, the cyclical use which is vital for sustainable resource management. Under current practice recycling, however, different likely to be mixed in an uncontrolled manner, resulting function losses and dissipation with distinctive functions, contamination recycled steels. The latter could result dilution loss, if metal scrap needed virgin iron reduce below critical levels. Management...
Economic growth is associated with a rapid rise in the use of natural resources within economy, and has potential environmental impacts at local and/or global scales. In today's globalized each country indirect flows supporting its economic activities, resource consumption through supply chains influences far removed from place consumption. One way to control identify chain. this study, we used link input–output model (GLIO, hybrid multiregional model) detect linkages between national nickel...
Metals underpin essential functions in modern society, yet their production currently intensifies climate change. This paper develops global targets for metal flows, stocks, and use intensity the economy out to 2100. These are consistent with emissions pathways achieve a 2 °C goal cover six major metals (iron, aluminum, copper, zinc, lead, nickel). Results indicate that despite advances low-carbon production, transformative system change meet society's needs less is required remain within...
Summary Effective life cycle management of polyvinyl chloride (PVC) calls for the separation end‐of‐life PVC products at time collection not only from other wastes but among different types as well. Information about flow in economy is important this purpose. Within framework Japanese input−output (IO) table year 2000, with around 400 industry sectors, captured terms six PVC‐embodying and three types, (1) flexible (soft PVC), (2) rigid (hard (3) others. The degree resolution; consideration...